March March 2018, 2018, Vol Vol 29 29 No.3 No.3 Africa's leading construction journal
Aviation Infrastructure Africaâ&#x20AC;&#x2122;s airports expansion
Getting Value with Decorative Concrete Water Borehole Services Laser Distance Meters
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MANAGING EDITOR Robert Barnes DEPUTY MANAGING EDITOR Francis Makari FEATURES EDITOR Dennis Ayemba COUNTRY EDITORS Kenya - Anthony Kiganda Uganda - Betty Nabakooza Nigeria - Boladale Ademiju South Africa - Jimmy Swira WRITERS Yvonne Andiva, Dorcas Kang'ereha, Pascal Musungu, Pascal Musungu, Nita Karume, Moreen Gakii WEB & GRAPHIC DESIGN Margaret Atieno Sales and Marketing Manager Ken Okore
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March March 2018, 2018, Vol Vol 29 29 No.3 No.3
Africa's leading construction journal
In the next issue, we look at how drones can be applied in construction
ADVERTISING Kenya: William Mutama, Trizah Njoroge, Lilian Khavosa, Fredrick Otieno South Africa: Thuli Nkosi, Winnie Sentabire, Angeline Ntobeng, Uganda: Nobert Turiyo, Selina Salumah Namuli Botswana: Dickson Manyudza, Gerald Mazikana Ethiopia: Haimanot Tesfaye, Ruth Girma Tanzania: Tom Kiage Malawi: Anderson Fumulani Ghana: Samuel Hinneh, Caleb Donne Hadjah Zambia: Susan Kandeke Zimbabwe: Chiedza Chimombe Rwanda: Collison Lore Nigeria: Seni Bello China:Weng Jie
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REGULARS Editor's Comment 3 Corporate News 4 Association News 5 Events 6 Product News 7 Management 8 Opinion - Lights Out!
Poor Governance and Africa’s Energy Crisis 10
COVER STORY: 12 Aviation Infrastructure: Africa’s relentless airports expansion Laser Distance Meters: Handheld device for measuring 16 Access Control: Access Control of the future 19 Concrete: Getting great value with decorative concrete 20
Published by Group Africa Publishing Ltd Head Office: Consolidated Bank House, 4th floor, Koinange Street, Nairobi 00100 Kenya, Tel: +254 772642042, +254-20-2213607 Email: firstname.lastname@example.org Uganda Agent Projects Unusual Uganda Ltd. Jemba Plaza, Luwum St. Kampala, Uganda Tel: +256 776 883181 email@example.com Botswana Agent Cadline (Pty) Ltd. P/Bag 494 Gaborone, Botswana.
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March 2018 Volume 29 No. 3
Laser Distance Meters
African airports should be autonomous to facilitate expansion
A Laser Distance Meter wins on every count: speed, accuracy, safety, versatility, convenience and functionality.
Africa is experiencing an upsurge of airports expansions but countries are finding it difficult to sustain the different projects due to financial constraints. The airports are making money, but most of it is spent on other things. Airport revenues are collected by the
16 Water Borehole Services in Kenya
revenue authorities and taken straight to the Treasury, a clear case of not feeding the goose that is laying the egg. The airport gets back a little from what it collects. Therefore, failure to get financing for the expansion of airports can be attributed to not having control over the revenues they collect. The pressure to modernize and expand airports
Although borehole drilling is seen
in Africa is unrelenting given the increase in air
by some as complex and expensive,
travel across the continent. According to a report by
players in the sector paint a different
ForwardKeys, a company that predicts travel patterns
and records bookings, in 2016, Ethiopiaâ&#x20AC;&#x2122;s travel sector grew by 9.6%, and Tanzania by 10.6%. The report also showed that Mauritius grew by 11.6%, and Kenya by 14.9%. But, while the traffic numbers look good,
governments are still cash strapped to expand or even build new airports to match increased traffic.Case in point isKenya where plans to begin construction of a new greenfield airport have been shelveddue to
Compressed Air: Onsite Compressed Air on Demand 24 Water Borehole: Water Borehole Service in Kenya 26 AWCS: Automatic Window Control System For Building 31 Water Meters: Mitigating the Water Crisis in Africa 33 Project: Sanlam Towers 36 Project: Enkang 38
financial pressures. Not all African governments have the capacity and resources to maintainand, improve airports and one solution to the problem is to consider making them autonomous to facilitate the necessary expansions.
Ghana Agent Image Consortium 1st Floor, The Ecobank Building, Tesano. Tel: 233(0)30 223 2728 I 233(0)274807127 I +233(0)206299159 Fax: 233(0)24 882 8286 Email: firstname.lastname@example.org, Calebhadjah@gmail.com
Nigeria Agent Rahma Associates B23/24, Aishetu Emoewa Plaza, 196, Iju Water Works Road, Ifako Ijaye Lga,Agege, Lagos. Tel: 234-1-7347860 Email: email@example.com
Kenya Agent Northwest Ventures Ltd P.O. Box 16414 - 00100 G.P.O Nairobi, Kenya Tel: +254 20 2679809 I 2679808, 2091305
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VINCI to build a pumped storage hydroelectric plant in Morocco French-based VINCI Construction Company has been awarded a US $346m contract to build a pumped storage hydroelectric plant (PSP) in Morocco near Agadir. The project, which consists of storing energy in hydraulic form, is part of the development and integration plan for renewable energies in the country. It includes execution studies, construction of civil engineering, supply of equipment and transfer equipment, assembly, testing and commissioning of the station. The civil engineering works The civil engineering works carried out by the construction company will also include the excavation of two basins, the digging of the production plant installed on the hillside and buried, the installation of the transfer pipe over 3km, of which 1km is buried. Access to the facilities for the site and for the future operation of the site also requires the creation of new roads and the rehabilitation of several others.
RIEGL wins a prestigious MAPPS Award
Energas powers Enertec’s gen sets into Southern Africa
RIEGL has became the proud recipient of the 2017 MAPPS Geospatial Products and Services Excellence Award. This prestigious award was bestowed upon the RIEGL miniVUX-1UAV miniaturized LiDAR sensor for unmanned laser scanning in the Technology Innovation category at the 2018 MAPPS Winter Conference. The RIEGL miniVUX-1UAV is a user-friendly and cost-efficient device to acquire survey-grade measurement data by use of remotely piloted multi-rotor, rotary-wing, or fixed-wing UAVs for a variety of applications. The RIEGL miniVUX-1UAV provides high speed data acquisition using echo signal digitization and online waveform processing, based on RIEGL’s sophisticated Waveform-LiDAR technology. Its excellent multiple target capability achieves superior measurement results, the 360° field of view allows complete acquisition of the environment, and its well-designed housing supports mounting, even with restricted weight and space requirements.
Leading supplier of specialized equipment to the natural gas industries in Southern Africa, Energas Technologies, has entered into a distribution agreement with R Schmitt Enertec, a German manufacturer of gas engines, generator sets and co-generation sets, to offer Enertec’s highly efficient power generators to the local market. R Schmitt Enertec’s range of highly efficient and innovative power generators is now available in South Africa and the neighboring countries through local supplier Energas Technologies. Depending on customer requirements, Energas will offer Enertec’s wide range of generator sets with or without heat recovery and co-generation; the ENERGIN, ENERGIN GEN+ and ENERGIN CHP units, ranging from 115 to 500 kW. ENERGIN generator sets are designed for power production in island or parallel mode with other generators and/or the utility.
Stabila measuring app allows for ‘smart’ construction sites The Stabila Measuring app allows construction-industry professionals to technology. Stabila is one of the use their smartphones for quick and easy documentation and processing premium brands distributed locally by Upat SA (Pty) Ltd. of measurements. The app is compatible with Stabila’s LD 520 and Available free of charge from the LD 250 BT laser distance measurers, using integrated Bluetooth Smart Apple App Store and Android Play Store, not only does the app make it possible to create drawings of spaces and objects, it also allows users to import images from a gallery, and add dimensions directly to these items. Before measuring an object or surface area with a smart device, the user takes a picture, and then applies the Stabila distance-measuring units. These measurements are transferred onto the picture captured on the smart device, and can be moved where required. Using the app, the user can even draw lines and rejig measurements The new Stabila Measures app provides for improved design, accordingly. The picture is assigned functionality, and intuitive operation 4
CR | March 2018
a job name and number, and can be emailed directly to the customer, or shared with the project office, in addition to being stored digitally for reference purposes. “The new Stabila Measuring app provides for improved design, functionality, and intuitive operation,” Upat National Product Specialist Charl Weber comments. Measurements can be transferred wirelessly from the lasers to a smartphone or tablet, making it possible to document projects on-site, and to communicate this critical information directly to the project team.
USEA hosts the Africa Energy Forum The
Association (Usea), hosted the 2018 Africa Energy Forum, in Kampala;
USAid through its Power Africa initiative. More
gathered to showcase off-grid solutions, which, according to
NSE lauds Buhari’s order on local content The Nigerian Society of Engineers (NSE) has lauded Nigeria’s president Muhammadu Buhari’s executive order on local content as a move in the right direction which would drastically reduce capital flight in the country. According NSE President Mr.KunleMakuolu the order will boost the capacity of local engineers to contribute their quota to the development of Nigeria. The order, labeled “Executive Order 5’’, is meant to improve local content in public procurement with science, engineering and technology components. Moreover, it also prohibits the ministry of
Usea chairman Emmy Kimbowa,
interior from giving visas to foreign workers whose skills are readily
will catalyze economic growth.
available in Nigeria.
Only 5% of Uganda’s population
However, it also notes that where expertise is lacking, procuring
is connected to the national grid.
entities will give preference to foreign companies and firms with a
This means that, to meet their
demonstrable and verifiable plan for indigenous development, prior
energy needs, many of those who
to the award of such contracts.
do have access to electricity are
Mr. Makuolu further urged the president to ensure that the order is
employing off-grid technologies
obeyed to prevent Nigerians from continuously developing other
such as distributed power and solar home systems.
economies and neglecting their own.
Energy minister Irene Muloni and US ambassador to Uganda Deborah Malac checked out the exhibition booths and delivered addresses. UK High Commissioner Peter West and Power Africa officials were also there. Uganda’s per capita electricity consumption of 157 kilowatt hours (kWh) is considerably lower than the sub-Saharan Africa per capita average of 552 kWh and the global per capita average of 2,472 kWh. By 2020, the government aims to achieve a national electrification rate of 30% through new onand off-grid connections, and to increase per capita consumption to 578 kWh.
NIOB urges gvt to engage local professionals, contractors
CESA to focus on effective ethical leadership this year The consulting Engineers of South Africa is set to focus on effective ethical leadership with the theme of ‘Our Future is Now’ as a theme for this year. According to the newly appointed president Neresh Pather, the world of the future can only be changed and facilitated through the leadership of today embracing the true purpose of service to humanity. “Change can be effected if we believe in it and work hard enough to achieve it and that with great leadership we can succeed. We need to ensure that all South Africans and Africans are given a fair chance to further their contribution to our continent. We need to allow for practices to address the imbalance of the past for this will take many, many years to address”. Planned programs of employment creation, skills development and encouraging trade relations with our neighbor’s, developed and emerging countries should be accelerated,” he said during the presentation of his presidential message and theme for the year.
The Nigerian Institute of Building (NIOB) has urged the Federal Government to evolve a definite policy to engage local professionals and indigenous contractors for involvement in the capacity development of industry practitioners. According to the NIOB President, Mr Kenneth Nduka, this has become imperative because of the ever-changing socio-economic and technological environment. “The Federal Government should show greater faith in exploring how best to add good value to societal expectations for policy making undertakings to be advantageously harvested,” he said. He further added that professional institutions like the NIOB have to be rightly situated as lighthouses guiding the members, the industry and general public from bad practice, corruption, indiscipline and bad governance. The president also pledged that the management and administration will be subjected to periodic audit and scrutiny to sustain administrative effectiveness and improve operational governance. Mr. Nduka also expressed his disappointment at the lack of political will on the part of all levels of government to effectively situate and enforce a statutory provision that would professionally drive activities in the built environment sector.
NIOB President Kenneth Nduka March 2018 | CR
Future Energy Nigeria
East Africa BUILD 2018
Future Energy Nigeria has evolved from the West African Power Industry Convention (WAPIC). This energy conference and expo addresses the Nigerian power crisis through industry connectivity and creative solutions. After 15 years of successfully driving new and existing industry relationships across the region, WAPIC has established its base in Nigeria to support the privatisation of the Nigerian power space. Nigeria is a country going through a tough economic cycle, compounded by a struggling energy sector and it is now that the platform of a meeting place to engage industry stakeholders keen to represent the sector is more important than ever. This refreshed project will continue to drive collaboration, networking, solutions and positive results for a sector that is beginning to emerge from crisis. The only industry meeting point that discusses, debates and provides answers to the future development of the sector. 13 – 14 November 2018 Eko Hotel & Suites, Lagos, Nigeria
East Africa BUILD 2018 is the ideal platform which provides participants unique insights on the entry strategies to the East African market and helps them assess the potential growth of their products and services in the region, as well as showcase their latest products, equipment and technology to the East African Building & Construction Industry. Delegates will have the opportunity to meet and network with a variety of people that matter to their business; from existing clients, suppliers, investors and to new customers Government officials, Trade officials, importers &
Stone and surface Saudi Stone & Surface Saudi is the only event in the Kingdom dedicated to connecting suppliers of interior and
industry professionals, like you, who are responsible for specifying and
for the commercial, residential, hospitality, and other real estate development projects.
exporters and the business community at large. The event
Discover the latest designs in
will bring together industry experts from across the globe
natural stones, covering, flooring
and within the region to exchange ideas, knowledge and
and other surface design products
share their expertise, as they connect with one another.
and innovative solutions – from marble, granite, tiles, ceramics, wall covering, flooring products, paints, carpets and other surface design materials at the show. Meet new suppliers from 18 countries and learn from over 30 hours of CPD accredited sessions at the conference and network with your industry peers.
Kenya - Architectural Association of Kenya
- Ethiopian Association of Civil Engineers
- Institute of Engineers of Kenya - Association of Consulting Engineers of - Kenya - Association of Professional Societies of East Africa APSEA)
- Association of Consulting Engineers Nigeria - Association of Professional Women
- Zimbabwe Institute of Engineers
- Institution of Surveyors of Kenya
- The Construction Industry Federation of Zimbabwe (Cifoz)
Ghana - Ghana Institute of Engineers
Engineers Of Nigeria - Council of Registered Builders of Nigeria - The Nigerian Institute of Architects - American Association of Petroleum Geologists Africa Region
- Khuthaza ( Women for Housing)
- Architects Registration Council
- Concrete Manufacturers Association
- Ghana Institute of Surveyors
- Green Building council of SA
- Ghana Green Builders Association
- South African Property Owners Association
- Ghana Institute of Planners
- Master Builders South Africa
- Association of Building and Civil Engineering
- Building and Construction Skilled Artisans
Contractors of Ghana
Association of Nigeria (BACSAAN)
- Nigeria Society of Engineers - Nigeria Institute of Architects
Institute of Surveyors of Uganda
Uganda Institute of Professional Engineers (UIPE) &
Institute of Namibian Quantity Surveyors
Uganda society of Architects
Association of Consulting Engineers of Namibia
- Zambia Institute of Architects (ZIA)
- Tanzania Institute of Quantity Surveyors
- Institute of Botswana Quantity Surveyors 6
- Construction Contractors Association of Ethiopia
- Zimbabwe Institute of Quantity Surveyors
- Kenya Property developers Association
- South African Council for the Quantity
and Quantity Surveyors (AQSRB)
- Association of Ethiopian Architects
- Institute of Quantity Surveyors of Kenya
South Africa - ASAQS
- Tanzania’s Registration Board of Architects
- Construction Regulation Board (CRB)
CR | March 2018
- Association of Building and Civil Engineering Contractors (ABCEC). www.constructionreviewonline.com
New John Deere 204L and 304L Compact Wheel Loaders
KOHLER presents CERIC and VEIL, a new age in freestanding baths These new showstopper baths from Kohler are bound to impress.
Liebherr debuts 50 M5 XXT concrete pump truck
John Deere has announced the new 204L and 304L compact wheel loaders, which are specifically designed to increase uptime and deliver higher productivity to customers. These models are built for professionals who frequently work in small spaces and on rough terrain. The 204L packs 62 horsepower, while the 304L delivers 67 horsepower while in use. Both models are equipped with Final Tier 4 Yanmar engines, and they have hydrostatic transmissions that keep noise to a minimum. Operators can also opt for ride control, which can reduce material spillage and create a smoother ride over uneven terrain. “We’re packing more productivity and efficiency into the wheel loader with the release of our L-Series models,” said Drew Miller, product marketing manager of compact wheel loaders with John Deere Construction & Forestry. “Perfect for year-round use, these workhorses were designed to take on tough jobs from warmer summer months to snowy winter conditions, while enabling the use of a versatile attachments portfolio when you need them.” The wheel loaders also have self-adjusting park and service brakes, as well as ground-level maintenance points for easy access. They include extended service intervals for engine oil/filter, final drives oil and hydraulic oil as well. Operators can opt for an enclosed cab or an open station with these loaders, both of which provide 360-degree visibility.
The simple, clean curves of the Ceric convey a minimal craft shape
Liebherr has unveiled its new
with ceramic detailing, expressing contemporary warmth and a soft appeal. The linear lines and symmetry are also appealing whilst the sloped lumbar support lets you indulge in a deep relaxing soak. Veil’s organic, flowing and immaculately balanced curves evoke a sculpted simplicity in tune with contemporary style. This freestanding
50-meter truck-mounted concrete pump, the 50 M5 XXT. The pump truck’s five section boom reaches to 161 feet vertically and 146 feet horizontally. For moving the material, the
bath offers a luxuriously deep bathing experience with supportive
M5 XXT offers four pump unit
contours that cocoon your body.
options with outputs from 138
Kohler launches these hand-crafted baths from a new solid cast resin
to 167 square meters per hour.
material, KOHLER Lithocast ®; a gloss cast resin that is lightweight
The four pivoting outriggers are
and easy to clean. This technologically advanced material allows for new geometries, textures and designs to emerge. Each bath is carefully shaped from one, solid piece, ensuring structural integrity, and the lightweight material allows for easier transport and on-site installation.
secured directly to the distributor boom pedal which directs the weight from the boom directly into the outriggers with no flexing of the body of the truck. Liebherr kept the weight down and increased stability with a newly designed boom pedestal. The slewing ring and drive are proprietary Liebherr components. The front and rear outriggers on the M5 XXT pivot on the same point. “This gives you a ton of flexibility as you set up,” says Liebherr’s
“Setting up on tight jobsites is very easy to do. You gain more Ceric freestanding bath
Veil freestanding bath
than 180 degrees working range on the boom,” he says.
New compactor from Volvo to boost productivity
The market wants a heavy
Volvo has added a variety of technological advancements to its new
20 years and be structurally sound
DD110C double drum asphalt compactor.
and safe on the jobsite, says
The 10-ton-class compactor, which will be formally introduced at the
Nichols. For this reason the all-
World of Asphalt show in March, features an optional Compact Assist
German made Liebherr M5 XXT
with Density Direct, which provides real-time density data displayed on a 10-inch touchscreen. The system prevents operators from over-
machine that they know will last
is built with rugged components and simplified electronics.
or under-compaction and allows them to react quickly to the density results, rather than waiting for a nuclear gauge or core sample. With the onboard display’s Impact Spacing Meter, the operator can control the compactor’s speed and maintain the correct impact spacing, even when following a paver traveling at 60 feet per minute. The DD110C runs on a 148-horsepower Volvo D4 Tier 4 Final engine and delivers 3,800 vibrations per minute.
March 2018 | CR
4 TIPS FOR CONSTRUCTION PROJECT MANAGEMENT SUCCESS
he nature of a construction project managerâ&#x20AC;&#x2122;s work largely vary from site to site much less company to company. However, what is vastly clear is that a construction PM has a lot of responsibilities compared to most PMs in different industries. This can be attributed to the fact that construction is a demanding and
unique industry. Extensive knowledge about the industry can often be the difference between a successful project completion and delays. The following are a few tips that can be highly useful to a construction PM to ensure project management success.
Effective Communication Communication is a very important tool for the success of practically every project out there regardless of the industry. Nevertheless, effective communication is one of the most critical elements to the success of a construction projects in particular.
The PM needs to make sure that there is constant and consistent flow of information not only on the ground but also with the stakeholders and supplier; in every single phase of the implementation of the project. With everyone on board, the implementation process will be much smoother and this will make it easier for the PM to solve any problems if or when they arise.
Continuous Planning The implementation of a construction project can be surprising at times because things may not go as initially planned. The PM is likely to encounter situations that may force him to make changes on the initial plan. Therefore, he is expected to be as flexible as possible so as to make changes on the fly as aspects of the project unfold. As a matter of fact, he may need to refine, revise and keep developing new plans through the implementation process to ensure the project is successful; keeping in mind that even the slightest of changes can have a significant impact on the overall outcome of the product. Pay attention to complaints from stakeholders or colleagues, and other warning signs, like a missed deadline or cost overrun, that there may be a problem. Preventing a crisis will keep your project running smoothly, save you a lot of time, and keep you, your team, and your stakeholders confident in progressing with the project.
CR | March 2018
Get Involved The PM as the head of the project has to be actively involved in every aspect of the project. He must literally work alongside his workers, leading by example. With the construction industry being so demanding, the PM has to understand his workers as well as familiarize himself with the construction site thoroughly. This would came in handy in case of a human resource issue that needs to be resolved. You have to become an integral part of the implementation process
Manage your expectations Too many projects are doomed to fail from the beginning because of unrealistic expectations. Setting impossible deadlines and assigning too much work to your colleagues will surely result in sloppy work and often missed deadlines; which will in turn throw your project off course, necessitating patch-up work, timeline extensions, eroded stakeholder trust, and a frustrated team. Understanding your workers will help you know their strengths and weaknesses. This can assist you in assigning tasks based on each colleagueâ&#x20AC;&#x2122;s skillset. Delegating tasks to the right person is very important because success relies on how well team members can execute their tasks.
Poor Governance and Africa’s Energy Crisis
Max Bankole Jarrett, Directorin-charge Africa Progress Panel
frica is rich in resources and opportunities. However, poor governance is the cause of Africa’s energy crisis. In so many fields, however, the continent is yet to hit its stride, often because there is not enough political will to manage resources better and create necessary incentives. Africa’s energy crisis is a prime example. Two-thirds of Africans – 620 million people – still do not have access to “affordable, reliable, sustainable and modern electricity”, one of the key global development goals. Decades of neglect and mismanagement have left Africa with some of the world’s worst-functioning grid systems. Africa’s energy deficit continues to stifle economic growth, job creation, agricultural transformation, and improvements in health and education. To achieve the Sustainable Development Goals in Africa and globally, it is essential that the continent’s leaders face squarely the global energy “trilemma”: how to power the socio-economic transformation of their countries by providing electricity that is reliable, clean and affordable for all.
Most electricity theft in Africa is carried out not by people too poor to afford electricity, but by people and organizations that consume large amounts of electricity and could pay for it. Several countries are showing what can be done to bridge the energy gap, fast. However, there is a need for greater action, across the board. That’s why the latest report from the Africa Progress Panel, Lights Power Action: Electrifying Africa, calls for a massive increase in investments – in on-grid, mini-grid and off-grid solutions – to solve Africa’s energy crisis more quickly. Lights Power Action underlines that the 620 million Africans without access to electricity cannot wait for grid expansion. Grid-connected megaprojects such as large dams and power pools are essential to scale up national and regional energy generation
CR | March 2018
and transmission, but they are slow and expensive. Governments must also increase investment in off-grid and mini-grid solutions, which are cheaper and quicker to install. More needs to be done Alongside greater investment, much more must also be done to better manage and prevent the loss of Africa’s existing resources, as the APP has emphasized in previous reports. That challenge is not only financial and technical, it is also deeply political. There is a pressing need for continued improvements in governance in the energy sector. As the chair of the Africa Progress Panel, Kofi Annan, has said: “African governments have a vital task to undertake, one that goes to the heart of the continent’s energy problems: fixing national energy grids that are unreliable and financially fragile. Many energy utilities suffer from mismanagement and inefficiency. A lack of accountability and transparency nurtures corruption. These are serious and persistent problems, yet they are solvable, as many countries are demonstrating”. Unreliable power supply is the main hurdle for businesses in Africa, as Lights Power Action notes. Thirty countries in Africa experience regular power shortages and blackouts, costing their economies on average 2% of their GDP, and up to 5% in some cases. Power shortages are often a result of electricity transmission and distribution (T & D) losses incurred because of physical and technological deficiencies. Africa’s high T&D losses, well above the world’s average of 7%, represent a major challenge for the power sector. Their severe impacts on the quantity and quality of energy supply, as well as the attendant economic costs, are felt throughout the power chain. It’s refreshing to see how strong political commitment, backed by financial support from multilateral banks and the private sector, has led to the implementation of T&D network development plans in countries such as Ethiopia, Ghana, Kenya, Mozambique and Nigeria. However, most of these investments are not specifically intended to connect the underserved. To accelerate the pace of energy access for all, the APP urges leaders to ensure that all urban and rural areas within the www.constructionreviewonline.com
power grid’s reach are included in the planning and development of T&D networks. Theft and the role of governments The problematic power situation is exacerbated by corruption and mismanagement, as well as theft and vandalism. In our report, no finding shows the paucity of governance in the energy sector more starkly than the fact that in several countries a proportion of electricity theft – a problem across the continent –is carried out by organizations that are nominally part of the government, including the armed forces in some countries. The analysis in Lights Power Action: Electrifying Africa shows that most electricity theft in Africa is carried out not by people too poor to afford electricity, but by people and organizations that consume large amounts of electricity and could pay for it, including government, corporate, industrial and commercial groups. This reality emphasizes why power provision is a highly political issue and an essential governance challenge in many African countries. According to Kofi Annan, “poor energy governance reflects the wider governance deficit that threatens to derail development efforts in a number of countries [but] where there is good leadership, there are excellent prospects for energy transition”.
The APP calls on Africa’s leaders to tackle the vested interests and networks of political patronage that are preventing many public energy utilities from providing optimal service in the national interest. The Panel also urges all governments to put in place integrated plans and policies to scale up Africa’s energy transition. In addition to enhancing and rolling out the grid, within countries and across borders, these plans should include incentives to invest in off-grid and mini-grid systems, protect consumers, and facilitate demand among disadvantaged groups. “Traditional approaches to extending the grid are no longer viable as the main option for African countries”, Mr. Annan has said. “They will take too long and will not meet the needs of our growing economies and societies. Instead, governments and their partners need to seize the opportunity to re-imagine their energy futures”. As Lights Power Action highlights, the recent rapid progress of countries such as Côte d’Ivoire, Ethiopia, Morocco and Rwanda in improving electricity provision shows just what can be achieved. It’s time for Africa as a whole step up the pace today to create a bright new energy environment tomorrow.
March 2018 | CR
the future ‘OPEN shaping of Africa’s aviation infrastructure SKIES’
Africa’s relentless airports expansion
THE BIG AIRPORTS AND MAJOR DESTINATIONS GET BIGGER
s Africa’s population grows and air travel becomes more affordable, together with increased foreign direct investment on the continent, construction of new airports and expansion of existing facilities has to accelerate. For instance, between 2011 and 2012 business activities at African airports rose from 45% to 80%. This trajectory has largely been attributed to the growth
of the continents GDP of 6.1% contrary to the global estimation of 5.8%. According to Nick Fadugba, the chief executive of African Aviation Services Limited, the African airports should restructure to facilitate commerce and tourism within and out of the continent. “This will foster sustainable development,” he notes. Therefore, in 2012, airport construction and
Copperbelt International Airport 12
CR | March 2018
The African passenger’s aviation industry has faced a number of changes in recent years. Firstly, the domestic, intra-and intercontinental traffic increased from 41.2 million passengers in 2002 to 127 million passengers in 2014 at an average growth rate of 16%; this is according to the International Civil Aviation Organization (ICAO) report of 2013. The Africa-Europe route, with approximately 1.2 million weekly nonstop return seats in July 2016, had by far the highest passenger share in the total international traffic to and from Africa. The second largest intercontinental market is the Africa-Middle East route 800,000, followed by Asia 90,000, North America 50,000and Latin America 12,000. This growth has been driven by sustained economic growth rates and increased urbanization in Africa and a paradigm shift, albeit a slow one, towards a market-oriented system that emphasized the liberalization of air transport services on the continent. Moreover, the Yamoussoukro Decision entered into force in 2002 creating a comprehensive policy framework with the stated aim of liberalizing air transport across Africa. Air traffic growth in the African hub airports can also be attributed to liberalization policies that their respective countries have pursued in recent years. In fact, Egypt, Kenya, Nigeria and South Africa, like an increasing number of African countries, have in recent years adopted a more liberalized approach to bilateral air services agreement, allowing for multiple designations of airlines and an unlimited number of frequencies. Moreover, the International Air Transport Association (IATA) projects a 5.1% growth in passenger numbers across the region by 2035 where nearly 300 million passengers will travel to and from African destinations and as a result, airport development projects today are mushrooming across the continent. Majority of airports in Africa are undergoing expansion in a bid to cater for rapidly growing passenger and cargo traffic volumes.
expansion plans were announced by several governments hosting regional hubs. In North Africa, Algeria budgeted US $952 million and Egypt US $18.5 billion on airport work. Nigeria budgeted US $1.07 billion in West Africa, and Rwanda US $650 million. In Southern Africa, Angola set aside US $2.1 billion for airport expansion, and Zambia committed US $500 million. Ethiopia Ethiopia’s showcase Bole Airport in Addis Ababa, opened in the early 2000s, is already seeing a US$ 250 million expansion. When completed, the facility will be one of Africa’s largest airports, handling 120 million travelers annually, the same capacity as Dubai and Heathrow airports. Bole International Airport is truly a regional facility, and 70% of passengers are transit travelers who never leave the airport but change planes for other destinations.
Additionally, Ethiopia’s Gambella Airport has recently installed a US$1.3m advanced Air Traffic Control (ATC) tower that directs aircrafts during takeoff and landing.The Ethiopian Civil Aviation Authority (ECAA) constructed the tower with the aim of expediting the movement of the increasing traffic jams at the Airport. “The project experienced delay for some times due to security issues of the Airlines hindering easy and flexible access to the construction site,” said Habtamu Ashine, Aerodrome Engineering Section Supervisor, during the handover ceremony of the project, held on September 20, 2017. Along with Gambella, the construction of six more towers are underway, and eight towers Gode, Bale Robe, Assosa, Kombolcha, Semera, Shire Endasillassie, Jinka, and Hawassa to commence in the future.
This will be a category two runway that conforms to international standards,” said Mr. Andersen.The current JKIA’s traffic capacity stands at 89%, thus it is necessary to expand its capacity as soon as possible. According to KAA, the technology of the proposed facility will meet the International Civil Aviation Organization’s (ICAO) category II specifications. The technology will also enable operations in bad weather thus avoiding diversion of aircraft.The project is an ICAO code F runway which can handle the new generation extra wide bodied aircrafts such as Airbus A380 and Boeing B747-800.
Kenya East Africa’s primary tourism destination, Kenya, is set to spend US $358m on construction of a new runway at the Jomo Kenyatta International Airport (JKIA) in Nairobi. Johny Andersen, of the Kenya Airports Authority (KAA) says that, on completion, the project will reduce mishaps on the path as it will nearly double the aircraft movement from 25 to 45 aircrafts per hour. “The runway will be an upgrade of the existing one (which was built in the 1970s).
Zambia Zambia is currently renovating and expanding the Kenneth Kaunda International Airport. The project which will cost US $360m is progressing well with construction of the new rescue and fire services expected to be completed within the course of this year.
Additionally, in 2020 JKIA expects to handle slightly over 17million passengers annually. The growth is also expected to accelerate to 35million by 2030.
The country is also set to undertake the construction of Copperbelt international airport in Ndola at a cost of US $400. The airport is projected to handle 2 million passengers and will consist of plane hangars,
BOLE International Airport www.constructionreviewonline.com
March 2018 | CR
JKIA Greenfield Project rest rooms, fire station, office blocks, kitchen, restaurants, waiting rooms, laundry facilities, service shops, kiosks and car park, among others. It will service the Copperbelt and North-Western parts of the country in tune with the region’s economic growth and travel needs. According to Zambia’s president Edgar Lungu, the government has prioritized the expansion of transport infrastructure as it is critically essential for sustained growth and socio economic transformation. “For us to achieve diversified and resilient economy as espoused in the seventh National Development Plan, we have to build a well function transport system, the project is a fulfillment of the patriotic front’s commitment to infrastructure development as one of the key priorities and strategy for accelerating our country’s socio economic development,” he noted during the commissioning of the CIA project. Egypt In North Africa, Egypt has recently unveiled the newly refurbished Cairo International Airport Terminal 2 at a cost of US$436m by the Turkey-based Limak Holding. The renovation, which was launched in response to the rapidly increasing passenger traffic at the airport, will increase the terminal’s capacity to 7.5m passengers per year from the previous 3.5m per year.
CR | March 2018
Cairo International Airport Partly funded by the World Bank, the renovation was aimed at further enhancing Egypt’s air transport sector, which is crucial to the country’s economic development. It will improve the quality of services, and reiterate the airport’s role as a regional hub. It will also allow the airport to handle large-body aircraft such as Airbus A380, Super Jumbo and Boeing 747. According to Olivier Le Ber, the World Bank’s Lead Transport Specialist, the refurbishment aims to support Egypt to improve the quality of airport services and strengthen its air transport capacity. “Having a good and reliable airport is very important for tourism which is an important sector for job creation and for bring foreign exchange revenues,” he said. All African countries have agreed to ‘open skies’ aviation treaties that will bring uniformity to pricing, routes and air space use fees. When these commitments are actually put into practice, African air travel will expand exponentially, driven this time by African travelers flying within the continent and not just international travelers on longdistance flights. With cut throat competition between countries in a bid to become the hub of choice for airline traffic it remains to be seen if the ambitious expansion of African airport will match those of developed countries. For now, it is clear that the continent is set to benefit greatly with the current quest for expansion.
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March 2018 | CR
Laser Distance Meters Proven handheld device for measuring distances, areas and Volumes
aser distance meters (LDM) provides you with various measuring techniques for the precise measurement of distances of up to three kilometers. A Laser Distance Meter sends a pulse of laser light to the target and measures the time it takes for the reflection to return. For distances up to 30m, the accuracy is 3mm. Onboard processing allows the device to add, subtract, and calculate areas and volumes and to triangulate. You can measure distances at a distance. Compared with a good, old-fashioned tape there’s no contest. A Laser Distance Meter wins on every count: speed, accuracy, safety, versatility, convenience and functionality. Basic Principles A Laser Distance Meter sends out a finely focused pulse of light to the target and detects the reflection. The meter measures the time between
those two events, and converts this to a distance. The formula is simple: Distance = Ä (Speed x Time). However the speed of light is 300,000 km per second, so to resolve differences of (say) 1 cm, the meter must measure time intervals of the order of billionths of a second. But don’t worry – the technology is well established and reliable. A laser distance meter can measure distances of up to 30m with an accuracy of É3mm. An Ultrasonic Distance Meter works on a similar principle, but instead of light it uses sound with a pitch too high for the human ear to hear. The speed of sound is only about ⅓ of a km per second, so the time measurement is easier, but there are other issues, as we shall see below.
achieve this, all the components work together in a perfectly coordinated overall system. This system is made up of a laser, the transmitter and receiver optics, the sensitive photo diodes and sophisticated electronics and algorithms for time or phase measurement. Drawingon various optoelectronic principlesfor measuring devices,
These laser sensors use laser light (pulsed or continuously modulated) to measure geometric distances, heights, lengths, levels and positions in a non-contact process. To
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such as time-of-flight, phase comparison and the pulse back-mixing method. These individual methods allow measurements accuracy to the millimeter, and measuring ranges up to several hundred meters. Natural and manmade surfaces/objects Using laser distance sensors or laser distance meter, you can measure on natural surfaces or reflectors and obtain fast and precise results. The laser distance meters operate using visible or invisible laser radiation and are rated as eye safe in compliance with laser class 1 or 2. The devices arecompact and locust allowing for various applications including construction, industrial both indoor and outdoor. All of the devices offer common standard interfaces, analog or digital data output, and parameterizable switching outputs. Besides laser distance meters for industrial applications, there are also extremely compact and high-performance laser distance meters (“laser rangefinder” based on diode- or solid-state lasers) for deployment in defense and security technology. A Laser Distance Meter is accurate to within a few millimeters, certainly equaling a tape for larger distances, and the line is always dead straight; no bending or sagging. You have a choice of units, and there is no risk of misreading, as with the intermediate marks on a tape. The Laser Distance Meter is much faster; point, click, and you have the result in front of you on the display. The job is done in just a fraction of the time it would take to use a tape. You donot need to walk to and fro, or have a helper at the other end. What is more, you can use it with one hand, leaving the other free to hold your notebook. With a backlit display and the laser dot itself, you can use your Laser Distance Meter in relatively poor lighting conditions.
of the line of sight of the LDM from the horizontal line is always displayed on screen in real time as one changes position of LDM. So one can easily measure inclined distances at various vertical angles including precise horizontal lines (0o), vertical lines (90o) and at 45o inclinations. You can use this function also to check horizontality and verticality of the surfaces and lines. Indirect distance measuring Indirect distance measure can easily be achieved. You are only required tomeasure at least two distance measurements, one precisely horizontal and other to the top of the object byselecting Pythagoras measurement function of the LDM. The height of a billboard can easily be measured with a simple 3 measurements, the first shot establishes the horizontal distance, while the 2nd and 3rd measurements establish the top and base angle of the billboard. Height is then calculated and instantly displayed on the screen. Suppose you have to measure up for a cable run underneath a building. There is no line of sight between the start and end of the run; you have to walk around the corner. Obviously a complicated task
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There is no need to wait until morning or to rig up lights. You donot have to access the far end of the measurement range or poke anything where it shouldnot be poked;only the laser light has to do that.You do not have to worry about obstacles on the ground, or even large features such as pipes or cables. If there is a line of sight to your target, and it is within range, you can very quickly find out exactly how far away it is. For the same reason, you can measure upwards without climbing to a ceiling or to the top of a building. So, the Laser Distance Meter brings safety benefits as well. No more scrambling up ladders or over steep or wet surfaces to get a measurement. These safety and versatility benefits are particularly valuable in hazardous environments, and there will be occasions when you would not be able to do the job at all with a tape. Only a Laser Distance Meter will do. Distance measurement with tilt sensors With LDM, Measuring a distance is easy, just power on your LDM and aim at your target and press measure. The inclination angle
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March 2018 | CR
with a tape, followed by some work on a calculator. However with your Laser Distance Meter you can measure two sides of a right-angled triangle, and it will work out the third with its built-in Pythagoras functionality. Similarly, you can get the height of a structure without even being next to it, just by measuring your distance from the base and from the top, and you can measure the width of a building by standing some distance away and taking measurements from there. Something else that a tape simply cannot do is to work out an area from two length measurements, or a volume from three measurements. Answers in seconds without a notebook and calculator. Another feature intrinsic to a Laser Distance Meter is that it can measure continuously in situations where you would have to reposition a tape repeatedly. You can walk along, marking out a path that is (say) a certain minimum distance from a building. This is another bonus that has great value in hazardous environments. There are many applications, such as to measure the width of a billboard, or to between one point with another point, which are separated by a river, or two inaccessible points, but you ask for a quick, accurate, and safe solution of measurement. So simply take two distance measurements to one point and then move the LDM to take the measurement to the second point, the distance between these two points will automatically be calculated and instantly displayed on the screen. Area and volume measurements Area calculations, measure width and length, then area enclosed is automatically calculated. Volume calculations, measure length, width and height. The volume enclosed by the three measurements is then automatically calculated
Why use a tape now! Finally a good old tape measure may be simple and reliable, but it is limited. You will need to find someone to hold the other end and also need to raise hot-work permits, make risk assessments and method statements. A Laser Distance Meter is accurate and quick and requires only one person and one hand. It is easy to use and versatile. Laser Distance Meters have on-board processing enabling the device to triangulate and calculate; it knows Pythagoras. You can measure distances at a distance, add, subtract and calculate areas and volumes. According to Mr. Felix Orina of Orbital Africa Limited, technology is changing at unprecedented rate. As well, the survey equipment and their associated technology keep on changing each and every day. â&#x20AC;&#x153;To be at pace with modern technological dynamics, we often try as much as possible to sell latest equipment to our clients. To augment equipment sales, we offer technical support and advise our clients to invest in new equipment such Drones, RTK/GNSS, digital levels, robotic total stations in order to optimize their returns on investment,â&#x20AC;? he adds. Orbital Qpfc advert.pdf 1 3/1/2018 5:43:29 PM
Camera and point Finder: When you are taking measurements up to 30m or further, the laser spots can hardly be visible and it is impossible to measure distance accurately. But some LDMs including Mileseey P7 which are equipped with high resolution camera and zooming capabilities (4X zoom in P7) can easily locate the right target on the screen and then simply pressing measure button to record the distance. Some LDM can measure up to 100m just as conveniently as measuring 10m. MY
The measurement taken can be exported to your smart mobile device or laptop via Bluetooth. The drawing or plans can be prepared thereafter.
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Contactless, Wearable’s, Wireless, Mobility, Cloud; Access Control of the Future
frican corporates have made great strides in the adoption of electronic based physical security systems. Residential developments are now joining the train with a storm, as the world heads to Smart homes. Mobility has also enabled accessing, monitoring and controlling spaces from anywhere in the globe. Traditionally, premise access was based on lock and key. Access control systems are an electronic evolution of the traditional padlock, these systems dictate who when and how entry into any space will be made. With the evolution of the internet protocol (IP) and developments in software, computing and storage system, Access control is now a converged IP system, operating in the realm of information technology. This revolutionaries’ access control easing the way we manage entry into our spaces.
with authorization to enter a space should do so with ease but at the same time the systems must ensure to unauthorized person gains access. Ease on management and monitoring is another major factor that is driving change in access control, with owners, users and property managers seeking systems that centralize managements and provide a lower total cost of ownership. Effective security basics are based on three core elements • Identity of Authorized personnel • Authentication • Authorization of Authenticated individuals to access the premise The major areas of new developments are in Authentication systems, Central control and management, Contactless access, power conservation and, integration with other systems
Making access control smooth, convenient while heightening security levels has been the main drivers to growth of this industry. Individuals
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March 2018 | CR
EVENTS NEWS DECORATIVE CONCRETE
GETTING GREAT VALUE WITH DECORATIVE CONCRETE
veryone regardless of the industry is looking for a solution that will not only be reliable but also as cost effective as possible. It does not matter which continent or country you come from, the construction solution you settle for has to project some level of value. Those in the decorative concrete industry have known for years that on a construction project, the value of decorative concrete presents itself over and over again, a simple concept called “value engineering.”
A primary tenet of value engineering is that basic functions be preserved and not reduced as a consequence of pursuing value improvements, such as reduced costs, an improved final product, and easier maintenance. Decorative concrete has become the logical choice for many construction projects because it delivers great value. Consider these popular applications where decorative concrete offers real benefits in terms of performance, cost savings, and aesthetics:
The decorative concrete advantage: • Cost savings by eliminating traditional floor coverings and using the slab on grade as the finished floor. • Reduced maintenance and longer service life. • Better resistance to moisture and heavy foot traffic. • Good light reflectivity.
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More big-box retailers are choosing decorative concrete as a finished floor as opposed to high-maintenance floor coverings or coverings that can fail due to moisture exposure. Many smaller retailers find that stained concrete floors are not only attractive but also very cost effective. Polished concrete is another popular choice for interior floors, especially in educational and medical facilities, because they create an attractive, lightreflective, easy-to-maintain durable surface.
Theme Parks Instead of traditional masonry pavers for flatwork and pedestrian areas, more theme parks are using stamped
concrete because of reduced long-term maintenance and care. Over time, pavers often become loose or they settle, resulting in tripping hazards. Replacing existing pavers with new ones can create undesirable aesthetics because the colors rarely match. The decorative concrete advantage: • No more loose or settled pavers that require resetting or replacement. • The elimination of tripping hazards that increase liability for parks and resorts. • Stamped concrete is safe, easy to maintain, and has a long service life.
Green Building Another area where decorative concrete has proven to be a value to builders and developers is in the implementation of sustainable building practices. Traditional floor coverings often require adhesives that emit VOCs into the atmosphere over
time, reducing the indoor air quality. Green building with concrete can contribute to sustainability in other areas as well by providing thermal mass and improving light reflectivity. Light-colored concrete pavements have also been proven to reduce the urban heat island effect by improving solarreflectivity values. The decorative concrete advantage: • Reduced energy requirements. • Conservation of resources. Concrete itself is made primarily from recycled materials and contributes to sustainable building. • Better indoor air quality. On your next construction project, try applying a value-engineering approach to your design process and the selection of materials. You will often discover that decorative concrete is the best choice.
Hi-Tech decorative cementitious surfaces for prestigious spaces Having completed impressive projects in over 80 countries world-wide, Ideal Work is a European leader in the production and development of decorative cementitious finishes. With an extensive range of high quality and technologically innovative systems, Ideal Work offers the possibility to create luxurious wall and floor finishes for both interiors and exteriors: residential, tourist, hospitality, commercial, public, private, institutional or cultural. Through passion and know-how, Ideal Work has been able to transform cement into a versatile, adaptable and attractive option for creating very aesthetically pleasing yet durable finishes. Ideal Work also offers certified application skills training and has a full technical and sales support structure for its clients.
March 2018 | CR March 2018 | CR 2121
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March 2018 | CR
Onsite compressed air on demand With recent advances in construction-specific rotary screw portable compressors, contractors are guaranteed of a steady supply of compressed air onsite for various uses in construction projects.
he oil-injected portable single-stage rotary screw compressorhas become an indispensable tool on construction sites in Africa, wherever and whenever contractors need compressed airto power heavy tools, as an alternative to stationary compressors. Though, it is also often misunderstood equipment.Unsurprisingly, it is not uncommon for wrong equipment to be used for applications, with very costly results. Concisely,Construction Reviewunderlines topical information about portable compressors sourced from OEMs that target the Sub-Sahara African market.
User-friendly control Firstly, functionally, there is not much difference between the electric-powered rotary screw compressors and oil-injected portable rotary screw compressors. However, in comparison with a stationary electrical screw compressor, a portable compressor has a pneumatic control system, with minimum amount of electronics. On the other hand, modern stationary compressors are manufactured with feature control panels with sophisticated microcontrollers and lots of settings and options.
Safety devices Safety is one of the most important features of portable compressors, bearing in mind that they are engineered to work in explosive or flammable environments. As a bare safety minimum, the portable compressor has safety devices for low oil pressure and/or oil level and too high temperature. Safety features like safety shut off valvesto and spark arrestor to prevent the diesel fumes from causing fire explosionare standard.
Endurance and reliability Robustness, strength and reliability are essential features in portable air compressors that are used in tough industrial environments.In particular, citing one area, the compressor has to be made of strong components like high-quality air filters.
Capacity range Portable air compressors come in all shapes and sizes. Typically driven by diesel engines, the size of the engine and the compressor depends on the air flow that is required and the air pressure. Usually, portable air compressors can deliver compressed air ranging from 7 to 12 bars.
Common Options Portable air compressors are available with many different options and extras. Basic options for portable air compressors include: • After cooler (to cool down the compressed air) • Moisture traps, filters. • Reheated (to heat-up the cooled-down air, to prevent moisture problems) What do I really need? The long and short of it, contractors have to seek conclusive answers to the following questions, before making the crucial decision of purchasing or hiring a compressor:
• • • •
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Specifically,what do I need a compressor for? What kind of compressor do I need? What is the right capacity of the compressor to serve my needs? Does the manufacturer offer back up services and sufficient replacement parts?
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March 2018 | CR
Water Borehole Services in Kenya
The process of drilling a borehole begins with a hydrogeological survey. This survey is carried out to determine such factors as groundwater levels and hydraulic characteristics. It should be done by a qualified and registered geologist. Once the geologist is satisfied with the ground water potential, authorization to proceed is obtained from the Water Resource Management Authority (WRMA). This
oreholes are necessary in areas where a steady
is followed by an Environmental Impact Assessment
supply of clean water is unavailable. Boreholes
(EIA). If the National Environmental Management
are drilled for many uses including industrial,
Authority (NEMA) is satisfied that the proposed drilling
irrigation and domestic consumption.
will not have undesirable impact on the immediate environment, the organization then issues a licence. The
Most Kenyan developers have opted for ground water
drilling may then commence although in some cases one
exploitation to attract tenants or buyers to their property
may require a no-objection letter from the local water
due to unreliable or even non-existent supply of water by
Mobilization of equipment then follows and the actual drilling gets underway.
Although borehole drilling is seen by some as complex and expensive, players in the sector paint a different
Steps in Drilling:
picture. The entire process including surveys, actual
Generally, the following steps are followed. They may
drilling and installation of pump may cost anything from
however differ slightly from service provider to service
Ksh 1.2 m to 3 million. Factors affecting cost include
provider. The client may also influence some elements.
physical distance from where the drilling company is located, their pricing policies, geological characteristics of the site, extent of the hole and pump used. There are
Drilling of 11â&#x20AC;?until loose top formation and installing 9â&#x20AC;? temporary casing, then drilling 8â&#x20AC;? up to recommended depth.
also several licensing requirements that cost money. 26
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3. 4. 5. 6. 7.
Casing: Installation of 6” casing pipe – Class – B (
Davis & Shirtliff
4.5mm thickness ) up to bottom. Generally ratio of
The Davis & Shirtliff Group is the leading supplier of
plain casing and screen casing is 70:30 but depends on
water related equipment in the East African region.
the hole drilled.
Founded in 1946, business activities are focused on six
Gravel Pack: Inserting 2-4mm natural gravel outside
principal product sectors - Water Pumps, Boreholes,
the casing and inside the open hole for artificial
Swimming Pools, Water Treatment, Generators and
Solar Equipment. The group is Kenyan based and
Development: This is done by air jetting until clean
operates through a network of Kenyan branches as well
water emerges. Generally, this can take up to 3 hours
as regional subsidiaries in Uganda, Tanzania, Zambia,
but may vary with the hole.
Rwanda, South Sudan and a partnership in Ethiopia.
Well head Slab: This is done using cement, sand and
Based in Nairobi, the company stocks a comprehensive
gravel in proper ratios to prevent contamination of the
range of borehole equipment sourced from leading
manufacturers around the world.
Capping: A cap is fitted over the hole until installation of pump.
Test pumping: This is done to measure the exact yield
This company offers borehole equipment and service.
of the borehole. The water needs to be pumped out
It is not engaged in actual drilling. Products supplied
continuously for 24 hours. It is then possible to tell the
include a wide range of pumps including surface
yield of the well, rest level and pumping water level.
pumps, dewatering pumps, sewage pumps, irrigation
This is important in determining the size of pump to
and borehole pumps. Others are motors and electrical
be installed. On the basis of test pump report, one
switch gears, pressure vessels and break tanks, horse
can decide the pump installation depth, size of pump,
reel pump sets as well as firefighting and sprinkler sets.
motor, delivery pipe, cable, control panel, water meter
The company also stocks pressure switches and gauges,
and other sundries.
uPVC submersible ipes, submersible cables, switch
Water chemical and bacteriological analysis is then
and control gears and accessories.
done by government chemist to assess if the water is
suitable for domestic/industrial use or not. Completion Report: A completion report is then filed with WRMA and a copy availed to the client.
SERVICE PROVIDERS Apex Boreholes & Engineering Company Apex Borehole & Engineering Company is one of the companies involved in borehole business. The Nairobibased company that operates not only in Kenya but also the larger East Africa region undertakes hydrological surveys, Environmental Impact Assessment (EIA), borehole drilling and equipping (installation of pumps). The company is well equipped and staffed to carry out these services. It boasts four rigs, three pump testing units, five terameters for survey, four engineers, five geologists and over 10 support staff. Technical Manager Harrison Mackenzie dispels the misconception that borehole drilling is an expensive undertaking for the client. He reckons that it really depends on the purpose of the borehole. “If it’s water for irrigation, that is an income generating business; if it’s real estate, that is a multi-million shilling investment”, he says. He adds that the average cost of a borehole (Ksh 2 million) is reasonable.
Boreholes are drilled for many uses including industrial, irrigation and domestic consumption.
March 2018 | CR
of ancillary services like Borehole refurbishment or Decommissioning, Borehole Surveying, Pump & Control Systems and their supply, Installation and Management Contract. The Nairobi-based company is sufficiently equipped both in terms of physical equipment and human resources. Geofarthom Drilling Company Limited Geofarthom is a Kenyan company that undertakes borehole drilling, equipment supply, dams and piping works. It serves a wide range of customers including parastatals, churches, institutions and individuals among others. The company operates four drilling rigs with capability to drill up to 380 metres. Kisima Drilling (EA) Ltd Kisima Drilling (EA) Ltd provides borehole drilling and associated services in the whole of Kenya with the exception of North Eastern and Coastal regions. Their clients range from individual to organizations. The company owns three drilling rigs and has a human capital of 40. According to P.R. Patel who is a director, the main The entire process including surveys, actual drilling and installation of pump may cost quite a substancial amount. From its offices and workshop at G.F. Corvin premises in Ruaraka Nairobi, the company is able to support its clients countrywide. Majitec’s clients include plumbers, construction sites, building services, agricultural irrigation and sewage treatment among others. The company boasts a well trained service team to offer technical support and support to its clients before and after sales. Aquadeep Drilling Solutions Limited Aquadeep Drilling Solutions Limited not only designs and constructs boreholes but also offers a complete range
challenges facing his company are delays in obtaining approval from government agencies as well as unhealthy competition. PRD Rigs Kenya Limited PRD Rigs Kenya Limited is a leading manufacturer of drilling and exploration rigs. The company serves water well contractors, mining companies, geotechnical and water services companies across East Africa. PRD Rigs has a fully equipped assembly section and workshops manned by qualified technical personnel. To read more and to comment on this story visit: http://www.constructionreviewonline.com
Apex Boreholes & Engineering Co. Ltd Registered Professional Borehole Contractors and Water Experts P.O. Box 60028-00200, Nairobi Kenya.ABC Bank Building, Dar es Salaam Road, Nairobi Email: email@example.com Tel: +254 725 267 083, +254 726 679 886
SERVICES OFFERED • Groundwater Hydro-Geological Survey • Environmental Impact Assessment (EIA) • Borehole Drilling Services • Submersible and Booster Pumps • Elevated Tank Installation • Borehole/Well Rehabilitation • Geo-Membrane Ponds 28
CR | March 2018
Geofarthom Hpfc.pdf 1 2/21/2018 4:54:44 PM
March 2018 | CR
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CR | March 2018
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Automatic Window Control System For Building
ne of the main reasons to automate windows is that of convenience. Not all windows are located at reachable height and may need a pole to operate, in some larger rooms and corridors many windows may need to be opened, so clearly an automated solution is preferable. On securing premises in the evening, automated systems can ensure all windows are closed prior to setting alarm systems. Other benefits can include ‘night time cooling’ strategies, when premises may not be occupied, and an automated solution can operate above ground windows on a time switch basis. The integration of automated windows into a complete building management system can ensure the most efficient use of energy. It is crucial that the ventilation strategy is decided at the outset of the design process. By adopting either a completely natural ventilated solution or a hybrid mixed Mode solution with mechanical cooling for in only the harshest of weather conditions, can significantly reduce a buildings running costs.
How do we achieve the ‘automation’? A window ‘actuator’ is usually an electrical device which is placed on the leading edge of a window to open and close a window to various degrees as required. These come in Three basic types, a ‘chain’ actuator, a ‘rack and pinion’actuator and a ‘linear’ actuator. Chain actuators are the most compact and operate by pushing a one wayfolding chain out from a flush motorised housing fitted to the frame or opening light. In areas where windows are much larger, linear and rack pinion actuators, based on fixed ‘screw’ and motor principle may be used. Whilst These Devices May Seem To Be Simple, Window Actuators Do Come In A Very Wide Range Of Sizes And Typical Offer The Following Choice Specification: Voltage: Either in 24V DC or mains 230V AC ratings. Where smoke control is required 24V DC actuators are used so that these can be operated from an independent battery back-up in case of fire and power outage in the building.
March 2018 | CR
Load Usually indicated in amperage and is very important to consider when specifying a complete system. Often cheaper units are less efficient and require greater loads which results in an increase of control panels to operate at the higher amerage, not to mention the increased energy requirements. Force Indicated in Newtons (9.81 N = 1Kg) and required to open and close the window safely in all weather conditions. Referring back to efficiency, the available force within the unit should be as efficient as possible to reduce the amperage required. Some larger windows may need two actuators to perform correctly. Stroke This is the distance the actuator travels creating the safe opening of the window normally indicated in millimetres. Speed Indicated in millimetres per second. This is an important consideration in smoke ventilation situations where smoke vents must fully open with a 60 second time limit.
CR | March 2018
Size Units vary in size depending on their specification but housings are very important to be considered when looking at the space available within the reveal, the size of the vent and the stroke required. Intelligence: Some basic actuators rely on simple switches to limit and run the actuator motor, where occupant intervention is required. Some more sophisticated devices offer resistance feedback and information on where the actuator is within its cycle by the use of incremental volt measurement. The most important aspect of all these variables is getting the right actuator in the right place to do the job most effectively with the minimum of maintenance. As mentioned earlier it is crucial to get a specialist involved at the very early design stages to determine the most efficient product and designs available. Leaving the choice of actuator to the lowest common denominator â&#x20AC;&#x201C; cost, can have a serious detrimental impact on an installations performance and on-going maintenance requirements.
Mitigating the Water Crisis In Africa
ater is a heavenly gift, which is unfortunately not always available. Cape Town is experiencing its worst drought in 100 years and has only 60 dayâ&#x20AC;&#x2122;s water left. Two consecutive years of water crisis has left almost 40 million people at risk in 17 African countries. The Horn of Africa is facing its third consecutive year of devastating drought, decimating crops and livestock, causing famine and disease.
Everyone should now realize their responsibility to conserve this scarce and valuable resource. In 2002 UNESCO declared access to clean water a basic human right, indispensable for a healthy and dignified life. Sophisticated infrastructure is required for managing, storing and reticulation of water to best serve communities. People can no longer be expected to collect water from dams and rivers. Rapid urbanization and population growth, coupled with climate change, is escalating competition for water allocation and is creating conflict between the value of water (tariffs) and the rights of different consumer groups. Most water supply systems are public investments for social improvement. It is invariably subsidized, as consumerâ&#x20AC;&#x2122;s contributions are not able to cover the cost of maintenance and operation of the system. Prepaid Metering Prepaid meters were installed in some low income areas in the UK since 1990, but were subsequently outlawed due to the negative
social and economic impact. Poverty is one of the root challenges in the water sector, manifesting itself in the inability to pay for water services. The adverse effect on poor or jobless households has to be considered, because if one cannot pay upfront, one is unable to access water. There are advantages, though. After initial push-back from civic organizations, prepaid metering is gaining acceptance. The benefit is that the consumer can budget and plan ahead to avoid unexpected bills or penalties for over-consumption. Payment can now be made electronically. Utilities do not have to maintain expensive billing systems and related staff costs and bad debts are eliminated. However, this solution has a high cost of equipment and infrastructure and requires higher qualified staff instead of lower paid meter readers. Prepaid vendors require expensive infrastructure to operate their systems, which is recovered through added vending fees.
It is essential to monitor meters constantly to ensure the integrity of the system. Unmonitored meters can easily be bypassed and taken off the grid without being noticed. Another risk is vandalism. Due to the inability to pay for water, users may damage meters to get free water. Post Paid Metering Conventional meters require very little maintenance and initial installation cost is much lower than pre-paid meters. However, the infrastructure required for reading and billing is labour intensive and costly. Meters are only read once a month and unequal reading periods makes it difficult to apply statistical analysis. Most leaks are only detected or reported when disputes arise. Authorities lose approximately 40% of potable water due to leaks and other losses (non-revenue water) so timely reporting is essential to curb losses. The risk for both parties is over-consumption which may lead to the inability of the consumer to pay, resulting in bad debts, penalties and fines. The Future A compromise has to be found as there are pros and cons for conventional and pre-paid systems. Effective water management has to consider the social needs, requirements and convenience of communities. A combination of conventional pre-paid and restrictions may be a solution, incorporating a tariff system with subsidies for poorer areas.
March 2018 | CR
DESIGN IS NOT JUST HOW IT LOOKS AND FEELS LIKE;
It is also how it works
anlam Tower, a state of the art eighteen storey office tower designed by GAPP Architects & Urban Designers, is setting new standards for high rise building construction in Kenya.
According to Peter J. Muller, who oversaw the construction on behalf of GAPP Architects & Urban Designers, the building draws upon lessons learned on previous projects to create a timeless design that will appeal to many generations while remaining appropriate to its life cycle. “It was designed to be constructed quickly and within the allocated budget, but keeping in mind its functionality and durability after completion.” Located along Waiyaki Way in Nairobi, the tower is envisaged to grow Sanlam’s global brand presence within Kenya. “The building hosts an eighteen storey office tower with a lettable area of 15,000 square meters, a four storey basement parking,as well as a three storey above-ground parking silo. The building is designed to have standby generators for backup power supply and a bore hole to supplement water supply,” said Muller.
CR | March 2018
toilet which leaves you to deal with
“Unlike the common extraction
A number of energy efficient and
your waste, the urinals send the waste
systems that draw odours out of
green architecture systems were
directly to a water treatment plant,”
the toilet bowl and into the air we
central to the tower design:
says Muller.“This type of urinal
breathe, the Hygizone does the
system is cost-effective since no
opposite. It draws odours inwards,
fresh water pipes are needed, with no
preventing it from leaving the toilet
With environment conservation in
mechanical or electric parts and no
bowl altogether.The system connects
mind, the design uses a 13mm thick
additional water required. It is also
to the duct in the ceiling, and expels it
clear laminated double tempered
more hygienic, considering there is no
outside.” explains Muller.
performance glass instead of
flushing mechanism and is odourless,
traditional air conditioning. “The
saving on the need for air fresheners
Natural cross ventilation
thermal performance glass reflects
and perfumed tablets,” he added.
Natural cross ventilation, Muller explains, involvessupplying and
heat while allowing light into the building, reducing glare in the
Due to cost constraints, the waterless
removing air from an indoor space
process. Moreover, the glass allows
urinal system was not implemented.
without the use of mechanical
heat to build up and absorbs heat from
An automated flush urinal, linked to
systems. This type of passive design
the roof,” explained Mr. Muller. The
a user sensor was however installed
attempts to use the natural air pressure
choice of the ideal combination of
instead. While still incorporating fresh
and forces to pull air through the
solar factor and U-value is essential
water flush pipes, the system uses less
building, and is the least expensive
in cutting down the building’s energy
water than regular urinals and can be
form of cooling and ventilation from
requirements, as well as saving on
adjusted to optimize water usage.
both a financial and environmental
investments in cooling systems and
In addition, the building is also the
point of view. Successful cross
firstin Kenya to utilise a Hygizone
ventilation is determined by having
system.Accordingly to Muller,
high levels of thermal comfort and
Sanitary & Water Saving
“The system involves extracting
adequate fresh air for the habitable
A number of innovative sanitary
the foul air directly from the toilet,
spaces, while having limited or no
ware fittings were incorporated into
removingodour and bacteria from
energy being supplied for active
the building. The design initially
the sourcebefore itcontaminatesthe
HVAC cooling and ventilation.
proposed the use of waterless urinals.
washroom. This extraction from
According to Muller, the building
Unlike regular urinals that utilize
thetoilet bowl provides a reduction
hasa dual window systemthat will aid
fresh water to flush the system, this
in the airflow required, and is more
in influencing air flow.“In order to
waterless system uses gravity to
efficient than conventional systems.
maximize wind ventilation, you want
flush the waste instead. “The outflow
When you utilize the Hygizone, you
the pressure difference between the
pipes connect to the building’s
eliminate the age old problem of toilet
inlet and outlet to be maximized. In
conventional plumbing system. In
odours and airborne bacteria.”
most cases, high pressures occur on
other words, unlike a composting
the inlet side of a building and low
March 2018 | CR
pressures occur on the outlet side. The approach is more
in terms of accessibility and the physical nature of the
convenient since it helps prevent excess moisture and heat
from building up in the ceiling. If you want cooler air, opening the bottom window will allow the warmer air will
rise and ventilate the room,” demonstrates Muller.
The Sanlam Tower has placed significant emphasis on fire detection and suppression mechanisms to ensure
the highest level of fire safety when the building is in
The design for Sanlam Tower placed a strong emphasis
use. “We contracted one of the best Engineering firms to
on the use on natural lighting which is supplemented by
evaluate the fire requirements and make recommendations
artificial lighting when required. According to Muller,
on the best possible approach to fire detection and
“The building uses occupation sensors during the day to
suppression within the building.These mechanisms are to
enhance natural lighting. This goes a long way in energy
meet the highest of international standards,” said Muller.
“This includes fire lobbies, fail safe sprinkler systems and fire breaks within windows, which ensures the vision
The eastern and western façade, which are more
glazing system breaks in the event of a fire,” he added.
vulnerable to peak morning and afternoon sun, are protected with aluminium fins to reduce solar glare and
heat gain, as well as serving to enhance the aesthetics of
Water has been a major challenge in the city over
the building. The design also incorporates a “light tower”
the years. With this in mind, the building is designed
on top of the building, which Muller explains will form a
to harvest and store rain water collect from the
visible landmark and signage structure that will be visible
roof.“Considering the small size of the roof,we decided
from a distance. The tower also hides the water storage
to do piping in order to have enough water,” says Muller.
tanks on the roof.
“In addition, we have included other systemsfor water conservation, such as the use of infrared sensor sanitary
fittings which are designed to operate directly from a main
With the ongoing threat of global terrorism in Kenya,
water supply. The sensor operates on detection of a user
the security design had a significant impact on shaping
by infrared beam,” he added.
the building. According to Muller, these concerns were carefully considered and taken in account, particularly
CR | March 2018
Visibility Multiple elements within the design are subtly used to create a unique synergy between classical proportions and modern forms within the tower faรงade. The aluminium shading fins, while reducing solar glare and heat gain, enhance the vertical proportions and aesthetics of the building. At night, these fins along the eastern and western faรงades will be illuminated to create a glowing effect, emphasizing the vertical lines and patterns, while the light tower on top of the structure forms a glowing crown that can be seen from a distance.
Main entrance The main entrance to the building is accessed via a large roundabout with a unique water feature at its centre, characterised by a series of large granite cubes. A central atrium around the reception area stretches four storeys high, creating a grand entrance and sense of generous space within the building.
Other features The building includes a series of landscaped and terraced spaces, providing break areas for users. The rooftop will include a multipurpose terrace and function venue that can be used for corporate events, and is divided into an indoor area with air
We are proud to be associated with the Construction of Sanlam Towers as the Consulting Quantity Surveyors on site www.macegroup.com/ymr
conditioning facilities, as well as an external area for public functions. Additionally, artificial plants are used on the terraces to minimise water consumption. 180209 JW SanlamTowers Advert.indd 2
March 2018 | CR
ENKANG A Modern and Affordable Development
gong Road has always been considered a
Enkang Apartments comprises 370 residential units
prime area to live or work in. Its proximity to
of various configurations. The development consists
amenities, major health facilities, educational
of studio apartments as well as 1, 2 and 3-bedoom
institutions and other services has seen many upwardly
apartments spread out on 6 blocks each having 11 floors.
mobile individuals flock the area in search of property to
The 1-bedroom and studio apartments are tailored for
buy or rent. Businesses have also not been left out; there
young professional while the 2 and 3-bedroom units are
are dozens of major NGOs and SMEs that operate from
ideal for growing families. The studios occupy 31square
the relatively quiet area of Nairobi.
meters while the 1, 2 and 3-bedroom units measure 50, 85 and 110 square meters respectively.
It therefore came as no surprise that Eris Property
Developers chose Ngong Road as the location of their
All the units are designed with vast open spaces allowing
owners to customize their interiors to suit their tastes.
CR | March 2018
Zimaki Qpfc advert samples.pdf 1 2/14/2018 4:46:09 PM
CIVIL STRUCTURAL ENGINEERING AUDIT C
We are proud to be associated with the Enkang Apartments Project Suite 11, 4th Flr, Vision Plaza, Mombasa Road P.O. Box 19721-00100 Nairobi, Kenya. Tel: +254 20 2066927 Cell: +254 733 909553, +254 751 264480 Email: email@example.com
The front view of Enkang www.constructionreviewonline.com
March 2018 | CR
Besides the residential units, Enkang features
Features and amenities
a 4-storey commercial centre at the entrance
Each block features an open roof terrace where
Affordability is one of the underlying pillars
from Ngong Road (the development can also
residents may congregate for parties of get-
of Enkang. Studio apartments start from Ksh
be accessed from Wahu Road at the rear).The
togethers. Each unit has a kitchen yard and a
3.2m while the 1, 2 and 3-bedroom apartments
commercial centre will house a spa and salon,
balcony. There is a high window to wall ratio.
start from 4.5m, 7.5m and 8.5m respectively.
There is a jogging track around the complex
and ample children’s play area.
Developer – Eris Property Developers
restaurants, a mini-mart, gym and health clinic. Estimated to cost at least Ksh1.2 billion
Architect – AIA Architects
(approximately US120 million), the
The entire development will enjoy solar water
development is being undertaken in two
heating and a pressurized water system. A
phases with the first phase commencing in
borehole with ensure that water is available
Structural Engineer – Edcons (K) Ltd
August last year and expected to be complete
throughout the development. The developer
Quantity surveyor – Zimaki Consult
in April 2019 while the second phase is
has also provided a back-up generator to
Services Engineer – Corporate Facilities
scheduled for completion in May 2020.
run essential services and common areas
whenever is outage from the utility provider.
Main Contractor – China Jiangsu International
According to the developers, Enkang was
Security has not been taken for granted: an
conceived as a modern and affordable
electric fence with CCTV motion sensor
property, a haven of peace within 15-20
cameras will be installed. In addition, all
minutes of the Central Business District. With
entries and exits within the development shall
growing infrastructure expansion in the area
Lifts – Sumacer Kenya
(Ngong Road is being converted into a dual carriageway with the first section already
Each block shall have a high speed lift
complete), property owners in the area are
controlled by a card.
enjoying capital appreciation.
Parking is available in the ratio of 1:1.5.
CR | March 2018
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