A DEDICATION TO YOU

We established the Excellence in RISA Awards in order to shine a light on our most valuable asset, you!

Over the years, we have seen some amazing projects that were designed using RISA software, and now is your chance to showcase your work, and share a bit about the blood, sweat, and tears it takes to bring a project to life.

Wekiva Parkway

(Section 6)

Lake Seminole County, FL

Project Description

Lead Engineer | Michael Veegh

Company | Construction Technologies & Engineering, Inc.

Contractor | Superior Construction Co.

Software | RISA-3D

This project consists of three balanced cantilever bridges built with form travelers i.e. self-launching formwork machines that support themselves off the previously built segment to construct the next one. Construction Technologies & Engineering (CTE) was hired by Superior Construction, the general contractor on the project, to perform an independent design review of the form traveler. This required an accurate 3D model of the traveler to verify the structural adequacy in multiple situations and to determine the form traveler weight, center of gravity and reactions on the bridge as part of the camber calculations. A form traveler consists of three independent form systems, all supported by the same structural frame. In order to accurately set the form elevations for each pour, the traveler has to be analyzed as one complete, integrated system. These individual form settings are important because even small deviations from theoretical segment dimensions can have outsized effects on the bridge camber because of the cantilever amplification and the cumulative nature of segment deflections. In addition, CTE performed field inspections of the travelers before first use and reported back to the contractor with CTE’s findings and recommendations. There were also some special situations where Construction Technologies & Engineering helped the contractor with bridge closure pours using the form travelers, initial load testing of the form travelers and designing a scheme whereby the upper part of the form traveler was moved as a unit by crane from one bridge structure to the next.

How was RISA used?

Since Construction Technologies & Engineering project involvement wasn’t centered around routine building production tasks, they reserved RISA-3D for specialized projects. These include the realm of bridge construction equipment, the development of substantial civil temporary works, and various building repairs and rehabilitation initiatives.

RISA-3D proved invaluable in this recent endeavor involving form travelers, enabling precise modeling and design validation, encompassing the intricate formwork elements. While the majority of the model was constructed directly within RISA-3D using a stick-built approach, certain components were imported from CAD software. What sets RISA-3D apart is its remarkable speed and user-friendly interface. Results are attainable with remarkable swiftness, and the iterative process is notably expedited.

In CTE’s line of work, the steel code verification feature of the program has been a tremendous asset, offering invaluable assistance. The crux lies in comprehending the program’s full spectrum of capabilities and crafting modeling strategies that leverage these functionalities to their utmost potential.

9 The Esplanade

Perth, WA

Lead Engineer | Arup

Company | Arup

Architect | REX/ Hassell

Contractor | Multiplex

Software | ADAPT-Builder

Project Description

The Esplanade stands tall as a 22-story commercial development crafted from concrete in Perth, WA, and is the brainchild of Brookfield Properties. Arup is providing a new service to Multiplex (contractor) on this development. In addition to meticulously handling the intricate design and documentation of the structure, Arup has assumed responsibility for an array of construction services associated with the development.

These encompass a gamut of activities such as reinforcement scheduling, intricate steelwork shop detailing, posttension design and shop drawings, formulation of temporary works design, creation of LOD 400 Models, and the implementation of Connect AR for site coordination. Furthermore, Arup has undertaken tasks including pour sequencing, bulk excavation, development of 4D and 5D construction models, and vigilant quantity tracking.

This comprehensive suite of services was instigated due to the persistent challenges faced by the contractor, particularly concerning the amplification of costs—up to 30%—from the tender document phase to the actual construction costs, primarily in aspects like reinforcement and post-tension strand quantities. With us providing all services, there is greater control and transparency between design and construction, with monthly tracking and comparison between tender and constructions costs. This is a real step change in the construction industry, using digital technology to advance the construction industry.

How was RISA used?

ADAPT-Builder is at the center of Arup’s delivery and has been used to streamline concrete and steel workflows. All structure is now modeled and designed in ADAPT-Builder by the engineer. There is no longer the need for a drafter to build a model in another software. All is now controlled by the engineer, giving a single source of truth, saving time, money and reducing risk and loss of information.

Plattsburgh Water Resource Recovery Facility | Chemical Disinfection Building

Plattsburgh, NY

Project Description

Lead Engineer | Annette Mason

Company | Aubertine and Currier Architects, Engineers & Land Surveyors, PLLC

Architect | Brian Jones

Contractor | Branon Construction

Software | RISA-3D; RISAConnection

The focus of the project was centered on improving disinfection and odor control at the Plattsburgh Water Resource Recovery Facility, primarily in the Chemical Disinfection Building. This Chemical Disinfection building was constructed to accommodate two new sodium thiosulfate tanks and one new sodium hypochlorite tank, as well as provide space for electrical and mechanical functions. Special precautions were taken to ensure that the high-risk sodium hypochlorite room was separated from other areas of the building. The building boasts a mat slab and concrete foundation walls of sufficient depth to contain any chemical spills and includes concrete piers which connect to the structural steel superstructure. Due to the importance of a wastewater treatment facility, the building is classified as Risk Category III and designed to withstand a Seismic Design Category C event. The structural steel framing and connections were designed using RISA-3D and RISAConnection to ensure the building is resilient and secure. RISA-3D was instrumental in calculating the member sizes as well as the shear and moment reactions necessary to design the connections. The result is a building that fulfills its intended purpose while being able to withstand potential risks with an aesthetic twist to try to bring a visually pleasing building into the community as the adjacent properties are frequently used for public events.

How was RISA used?

The structural steel frame of the building was designed using RISA-3D, which resulted in a stunning design feature showcased through the large glass curtain wall on the northwest corner of the building. All the structural steel designed in the space is visible from the interior as well.

The undertaking presented an array of intricate structural design complexities to address. These encompassed a series of significant factors including a higher risk category and a higher seismic design category surpassing that of typical structures in New York state. Additionally, considerations encompassed the fluctuating groundwater level, the potential for buoyancy issues given the project’s proximity to Lake Champlain, the substantial building height, and its exposure to potentially strong winds. Furthermore, the project featured an abundance of window openings and intricate glass elements that added to the design challenges.

RISA-3D made the tedious task of calculating a steel frame with significant moment values effortless. Additionally, it allowed for the efficient redesign of members, making the whole process much smoother. Tying the masonry backup wall to the structural steel frame was achieved with a spandrel beam, which was also designed in both RISA-3D and RISAConnection. Through the director tool, the reaction values and selected connections were seamlessly brought over to RISAConnection for the design of all connections on the steel frame. The robust structure designed using RISA software meets and exceeds all expectations to create a project that will stand the test of time.

White Bear Lake Area

High School

White Bear Lake, MN

Project Description

Lead Engineer | BKBM Engineers

Company | BKBM Engineers

Architect | Wold Architects and Engineers

Contractor | Kraus Anderson

Software | RISA-3D

The White Bear Lake Sr. High School project encompasses several additions to an existing building. One of the additions is a commons space utilizing slanted columns with steel bracing and moment frames. The slanted columns and diagonal braces are meant to simulate the masts of sailboats at various lists when docked as the school is part of a prominent sailing community. The structure is ‘sandwiched’ in between existing circular buildings on almost all sides. Long cantilevers extend the new structure to meet the existing to avoid underpinning existing foundations. There is a high-low roof condition, interrupting the continuity of the diaphragm. Steel beams and joists frame the roof structure and a steel supported mechanical mezzanine houses the mechanical systems to serve the space. This particular area is constructed in two sequences where a temporary wall needed to be constructed until the second sequence could be erected while the first one went into service.

How was RISA used?

The project’s structural analysis employed RISA-3D, utilizing plate modeling for its diaphragms. The structure was modeled in Revit and exported to RISA-3D where loadings and boundary conditions were modeled. Multiple versions of the model were generated to study various boundary conditions and unique behavior/interaction of the frames in the 3D space that would have been lost had a 2D software been utilized to model the main frames only. There was considerable axial load in some of the beams between frames and loading in the diaphragms at low roofs due to gravity only loading. Many of the designs were controlled by gravity-only load combinations. The slanted columns are set in pairs and converge on a single workpoint. Idealizing this boundary condition and extracting the reactions for footing designs was captured in copied models to better understand how to idealize the structure in RISA. Reactions were exported and input into spreadsheets to design eccentric footings due to the permanent horizontal thrusting from dead and snow loads.

Vandamm House

Park City, UT

Project Description

Lead Engineer | Spencer Lee

Company | ConstruPT

Architect | Upwall Design

Contractor | Midway Construction

Company

Software | ADAPT-Builder

A 25,000 sq ft residential post-tensioned (PT) transfer slab in Park City, Utah, was designed for a home inspired by the Vandamm House from Hitchcock’s “North by Northwest” film. The front of the house featured a distinctive temporary cantilevered structure that required careful consideration during the design phase. Later on, this cantilevered section was supported by HSS rectangular braces.

One of the project’s unique aspects was a 10,000-15,000 sq ft area beneath the main driveway and entrance, often referred to as the “cave.” This space necessitated the installation of several long-span bonded post-tensioned beams supporting a one-way slab. The engineer of record for this project, known as Canyons Structural, based in Salt Lake City, Utah, reached out for collaboration. This connection had been established through prior interactions, where they had sought assistance with ADAPT-Builder for various podium and PT projects. Canyons Structural contacted our expert to explore the possibility of implementing post-tensioning in the main driveway, as the beams spanning the “cave” roof extended over 80 feet and the large built-up steel girders faced challenges related to temperature fluctuations in Park City.

How was RISA used?

Eighty foot long-span bonded beams and one-way unbonded slabs were designed using ADAPT-Builder and required advanced capabilities of the software for deflection and stress computations. ADAPT-Builder’s capabilities of integrated beam and slab design with usage case functionality made it a perfect solution for analysis and design of the combined long-span beam and slabs. Unique loading conditions with transfer, snow, and truck loading made ADAPT-Builder functionality a perfect solution.

Car Barn Project

Santa Barbara, CA

Project Description

Lead Engineer | Morgan Prescott Jones

Company | Doyle-Morgan Structural Engineering, Inc.

Architect | Appleton Partners LLP

Contractor | John Lambe Construction, Inc.

Software | RISA-2D

Structural design for a new 2-story 10,972 sq ft barn to house the owner’s extensive collection of thirty (30) vintage Ferraris. The barn contains a center viewing catwalk, supported by diagonal tie-rods, above the main floor. The catwalk connects a small second-story office (also accessible via elevator) on one end, to an attached 1,248 sq ft covered deck at the other end.

Each of the six moment frames utilized in the design was supported by a 24” diameter cast-in-place caisson, connected by concrete grade beams running in both directions. The design challenge was to provide a 224’ x 60’ open bay with vaulted ceiling and full-length cupola. In the long direction, the design utilized conventional shear walls in between the large windows. In the short direction the design utilized a series of six (6) cathedral shaped moment frames. The finish wall façade was site constructed, full-sized adobe bricks. The roofing was clay tiles (shipped from Colombia, South America).

How was RISA used?

The six cathedral shaped moment frames at 26.6” on-center were designed using RISA-2D. Because the finished wall façade was constructed with full-sized bricks and the roofing was clay tiles, not only were moment frames spanning a large, vaulted area, but they were resisting an imposing inertial mass. RISA-2D was used to iteratively refine the sizes of the moment frame members to satisfy the geometry which would provide the aesthetic the architect was looking to achieve.

South Beach at Long Branch

Long Branch, NY

Project Description

Lead Engineer | Bill Bocchieri

Company | Harrison Hamnett

Structural Engineers

Architect | Shore Point Architecture

Contractor | Cornerstone Construction

Software | RISA-3D | RISAFloor

RISAConnection

Designing a new 9-story cast-in-place concrete building brings unique challenges. The structure boasts a twoway slab design, highlighted by spacious cantilevered balconies stretching up to 12 feet and a rooftop pool. The concrete framework rests upon a multi-tiered steel-framed transfer slab positioned above an underground parking level. This transfer slab takes on the added responsibility of supporting an elevated pool slab featuring a sandy beach-style entrance. A distinctive aspect of the design involves a steel structure with an entirely different column grid, a necessity to satisfy the need for slender columns that can be accommodated within the parking zone. This innovative approach ensures the successful integration of the concrete and steel elements, creating a harmonious and functional architectural solution.

How was RISA used?

The design process for the project relied on RISAFloor ES for the structural aspects of concrete slabs, columns, and bearing walls. Additionally, it was employed for the design of the steel-framed transfer slab. To facilitate the creation of construction documents, the model was seamlessly transferred to Revit through RISA’s utility plug-in. Furthermore, RISA-3D played a pivotal role in the lateral design, assisting in the distribution of lateral loads throughout the structure. This integrated approach ensured a comprehensive and efficient workflow, where each software application contributed to different facets of the design and analysis, ultimately resulting in a well-coordinated and robust structural solution.

Skyway Center

San Carlos, CA

Project Description

Centrex Construction requested design services for New Hangars | Tenant Lounge | GSE Building at San Carlos Airport (SQL) for Skyway Center (Owner). The project site is located directly south of the Hiller Aviation Museum. The existing structures on the site were removed to accommodate the new aviation facility.

Lead Engineer | JRMA

Company | JRMA

Architect | JRMA

Contractor | Centrex Construction

Software | RISAFoundation

The hangars accommodate a variety of corporate and personal aircraft and were designed to be divided for tenant-based needs. The two Hangar Groups are oriented an in east-west direction (perpendicular to the runway) with a new taxi lane between the hangar groups. The north Hangar Group has a small Tenant Lounge on the east side and the south hangar group has access from both the north and south with the potential to add in an east-west demising wall or provide for flow-through hangars. The east side of the south Hangar Group has a GSE Building with east facing access.

How was RISA used?

RISAFoundation facilitated the checking of standardized footing to various load combinations. The original design was that each hangar has its independent moment frame and therefore a footing will be supporting two columns from two adjacent hangars. The challenge was the seismic reactions at these two columns are always opposite in direction. Also, the door jamb and moment frame column share a common footing which creates an eccentric loading. The issue arose when after value engineering, it was decided to share one column for two adjacent hangars. The original RISA model was updated to accommodate this change and the redesign was done very quickly.

The software contains a range of valuable features. The DXF import and export functionality proved highly advantageous, facilitating seamless data interchange. The capacity for spreadsheet-based input and output emerged as the second most beneficial aspect, streamlining data management. Usability was elevated through the ability to conveniently hide and isolate specific elements as needed.

Empyrean Temple

Black Rock City, NV

Project Description

Lead Engineer | Rbhu Engineering

Company | Rbhu Engineering

Architect | Laurence Renzo Verbeck

Contractor | Laurence Renzo Verbeck

Software | RISA-3D

The Empyrean Temple, designed by architect Renzo Verbeck, debuted at Burning Man 2022. Comprising 8 star blade canopies crafted from wood adorned with tessellation lattice, the temple draws from ancient cosmology where the Empyrean symbolized a fiery celestial realm. Its design invites introspection and spiritual exploration for visitors as they traverse its experiential space. The sculpture-cum-architecture melds sacred geometry into a monumental light and shadow compass rose beacon.

The project aimed to provide an experiential artwork for Black Rock City, Nevada, an annual gathering that builds a non-denominational temple for reflection. The Empyrean Temple, chosen for 2022, embodies inclusivity, offering a healing central flame for reflection, resolution, release, and renewal. Built through community collaboration, the temple becomes a communal space, culminating in its ritualistic burning.

Rbhu’s engineers collaborated with Renzo to ensure structural integrity, given the massive yet temporary nature of the installation. The 70-foot-tall wooden structure features an overarching compression ring supporting the 55-foot canopy and flame. The canopies, resembling star blades, transition from solid to open lattice, embodying energy release. Empyrean Temple embodies profound symbolism in a transient architectural masterpiece, evoking spiritual connections at Burning Man.

How was RISA used?

RISA-3D was chosen for this project due to its impressive speed and reliability in terms of frame analysis. Notably, the software serves as an essential tool when it comes to adhering to strict quality assurance and quality control (QA/QC) processes.

The primary hurdle in engineering sculptures lies in the realm of aesthetics. Aesthetics assume a pivotal role, thus necessitating a delicate balance between structural support placement and artistic expression. This demands an engineering approach that adheres to a specific set of constraints driven by the aesthetic vision. Moreover, additional challenges stemming from site conditions and foundation considerations further compound the task.

The Key

Rosslyn, VA

Project Description

Lead Engineer | Meyer Consulting Engineers

Company | Meyer Consulting Engineers

Architect | MTFA Architects

Contractor | The Dittmar Company

Software | ADAPT-Builder

The Key project is a mixed-use development with two high-rise towers located in the heart of downtown Rosslyn, Virginia. The gross footprint area of the complex equals approximately 1,125,950 sq ft. A 30-story residential tower and a 39-story hotel tower rise independently above the 17th level. The building will contain 508 residential units, 351 hotel rooms, approximately 359 parking spaces, several commercial tenant spaces, an elevated outdoor plaza area with pool, a gymnasium and golf simulator. As the new tallest building in Rosslyn, The Key provides exquisite views of the nation’s capital.

The structure comprises concrete foundations and framing with mild reinforced slabs at the lower-level parking decks and post-tensioned slabs at the public and residential floors. Concrete transfer girders as deep as 6’-6” with spans up to 70ft were used to produce large open spaces at the ground floor lobby and, the 8th floor ballroom. An 18-inch-deep post tensioned slab was used at the mechanical access level to span up to 50ft over the conference rooms below while supporting up to 150 pounds per square foot live load. Several columns above the entrance lobby diverge into two separate columns which slope between level 4 and 18.

How was RISA used?

ADAPT-Builder was used to perform three-dimensional analysis of the building to determine the seismic and wind forces to be resisted by the lateral force resisting systems. The lateral system includes a combination of concrete and masonry shear walls surrounding the several elevator and stairway openings. In the past, using a more conservative two-dimensional analysis, a building of this size would have required masonry shear walls to be used at the demising walls between units. However, because of the efficiency of the ADAPT-Builder’s three-dimensional analysis, these additional shear walls were not required.

ADAPT-Builder RC was used to analyze and design the mild reinforced parking garage decks from lower level 3 up to level 2. ADAPT-Builder PT was used to analyze and design the post-tensioned slabs from level 2 up to the roof of both towers. In the past, these post tensioned slabs would have been designed one column line at a time. The ADAPT-Builder software allowed for entire floor slabs to be designed all at once with the output being easily exported to AutoCAD for quick entry onto the structural drawings.

Generac Power Systems

Sound Testing Facility

Waukesha, WI

Project Description

Lead Engineer | Todd Weber

Company | Oliver Construction Company

Architect | Josh Davison

Contractor | Oliver Construction Company

Software | RISA-3D | RISAFoundation |

RISASection

A long-standing client approached Oliver Construction with a specific request. They needed an area to conduct decibel level evaluations for a diverse range of generators, in order to comply with sound emission regulations enforced by various states and municipalities. The testing area had to be versatile enough to accommodate both existing and future generator models, some of which were anticipated to weigh up to 100,000 pounds. Moreover, the client required a generous open space surrounding the equipment for acousticians to set up microphone arrays at precise distances from the generators for testing purposes. Additionally, they wanted the building designed with the option of enclosing it in the future.

To address these needs, Oliver Construction chose a 44,500-pound bridge crane equipped with a 50-ton lifting capacity, a minimum 38-foot clear hook height, and a 75-foot clear span. The crane’s design factored in the need for ample space between columns, allowing easy access for semi-trailers, which would deliver equipment directly to the crane. The entire structure, including 78-foot clear span trusses supported by columns spaced at 28 feet on-center, was meticulously designed using RISA-3D. For the foundation, RISAFoundation was employed to design column piers and footings capable of withstanding the crane’s motion and future wind loads. The construction utilized a total of 157 tons of steel, 33 tons of rebar, and 450 cubic yards of concrete within a compact 115-foot by 82-foot building footprint.

How was RISA used?

A combination of RISA-3D, RISASection and RISAFoundation were used to design this unique structure and supporting foundations. RISA-3D was utilized to generate more than 270 relevant load combinations used to analyze the structure subjected to many distinct types of loads. Load combinations needed to account for a 50-ton capacity, 44,500-pound moving bridge crane, vertical loads for the current open or future enclosed structure and wind loads on a snow/ice covered structure. Very stringent deflection requirements to keep the crane in alignment were set by the crane supplier: A maximum of span/600 vertical and span/400 horizontal.

After analyzing code required load combinations, W14x145 x 53-foot columns were selected. RISASection was used to create a built-up section for the crane runway. A W36x160 with a MC18x42.7 was chosen for the runway beams to meet both vertical and horizontal deflection requirements. The 78-foot clear span trusses were fabricated in two pieces and bolted together in the field. Each truss consisted of W12x72 top chords and W12x65 bottom chords with tube steel web members. Various horizontal and vertical bracing was used to meet the tight deflection requirements. Column reactions sent to RISAFoundation resulted in the design of 4-foot square piers reinforced with (12)#10 bars. Multiple hold-down ties were required to resist the loads transferred through (12)-1 ½” diameter x 3-foot-long anchor rods. 17-foot square x 37-inch-thick footings were required to resist the large vertical and moment loads transferred by the piers.

Maintenance Building Facility

Thousand Oaks, CA

Project Description

Lead Engineer | Wil Hana

Company | JRMA

Architect | Richard Hasapis

Contractor | FBE

Software | RISAFoundation

The building spans 17,440 square feet and comprises 8 vehicle bays, along with an adjoining two-story office that serves hauling operations. The structure boasts 3 repair bays, 2 PM preventative maintenance (PM) bays, a dedicated welding bay, a bay for tire maintenance, and even a truck wash bay. The attached office space is designated as an operational support facility, accommodating functions such as dispatch, a designated area for drivers’ breaks, and restroom facilities.

Externally, the walls are constructed using a combination of concrete masonry units (CMU) and metal panel siding. The roof framework is composed of metal trusses and purlins, supporting a standing seam metal roof. The original architectural floor plan called for braced bays independent of each other. The challenge was the architect revised the floor plan that made the two orthogonal braced frames share the same column and made us use an L shape foundation. Designing for stability was the main issue and by enlarging the foundation 6 inches every run an optimized size was achieved.

How was RISA used?

Due to significant overturning forces on the structure, RISAFoundation was used to efficientlyminimize the mat foundation’s volume. For this project, the DXF import/export functionality proved highly advantageous, facilitating seamless data exchange between analysis and drafting software. Additionally, the capacity for spreadsheet-based input and output emerged as another highly useful aspect of the process, allowing for streamlined data management. Finally, usability was increased through the ability to conveniently hide and isolate specific model elements during review.

Hosmer Elementary School

Watertown, MA

Project Description

Lead Engineer | Kevin Champagne

Company | Pare Corporation

Architect | AI3

Contractor | Brait Builders

Software | RISA-3D | RISAFloor |

RISAFoundation | RISAConnection

Hosmer Elementary, part of a series of school projects undertaken by the Watertown School District, stood as the largest of the Elementary School endeavors, spanning three stories and encompassing 140,000 square feet. Its design presented a host of intricate challenges. Noteworthy design elements encompassed extensive longspan floor and roof steel supporting upper-level classrooms above the gymnasium, while also accounting for roof loads and snow drifts. Additionally, it involved bracing the substantial curtain walls and the creation of a trussed connector bridge linking the two wings of the structure.

One distinctive feature of Hosmer Elementary’s structural design was the glass-clad bridge, uniting the building’s two wings. This bridge incorporated multi-story steel trusses to achieve a slender and open floor structure. Pare, the engineering firm, devised a steel superstructure supported by braced frames and shallow foundations. Collaboratively with the architect, Pare strategically placed braces and devised creative orientations to align with architectural layouts. Furthermore, Pare’s expertise extended to crafting structural designs for solar canopies in the parking and walkway areas, enhancing the buildings’ solar array capacity for net-zero efficiency.

How was RISA used?

The design process commenced within the RISAFloor platform, utilizing the architectural floor plan as the foundational blueprint.

As the project evolved, the design seamlessly transitioned to RISA-3D and RISAFoundation. The transition to RISA-3D provided additional structural modeling features as well as robust lateral analysis. The superstructure reactions (from RISAFloor and RISA3D) were then used as the starting point for foundation design using RISAFoundation.

RISAConnection played a pivotal role in scrutinizing moment connections, ensuring they met stringent requirements even when constrained by specific member sizes. During the early phases of the project, the RISA-Revit link facilitated a synchronized workflow, allowing for a holistic and integrated approach to design and engineering.

LodeStar

Black Rock City, NV

Project Description

Lead Engineer | Rbhu Engineering

Company | Rbhu Engineering

Architect | Randy Polumbo

Contractor | Randy Polumbo

Software | RISA-3D

This memorizing sculpture rose 50 feet into the air from the dusty playa flats at Burning Man. The piece is composed of a Lockheed Martin Loadstar military jet. The piece was originally fabricated in 2017, it had its first debut at Coachella. The team decided to take the project to Burning Man 2018 and complete the interior that they had not managed to finish the year before! Lodestar on playa gave fantastic views from the top and was also a collection spot for individuals who gathered together in the “blossom” that was at the tail of the jet!

The project took six months to build and the crew consisted of about two dozen people. While at Burning Man the crew at one point almost took the whole project apart to start again. While in the process of engineering the team at Rbhu made the Lodestar crew add around 150 pieces of new steel to the structure. While the piece was at Coachella the project was closed off at the top. Individuals were not able to go to the platform. With the new addition of new steel it was made possible for people to go up to the viewing platform.

How was RISA used?

Rbhu’s company has a rich history of employing RISA-3D for over a decade, complemented by their engineers’ impressive track record of more than 15 years of hands-on experience with the software, which they rely on extensively in their day-to-day operations.

Rbhu’s predominant tools for analysis revolve around RISA-3D’s frame and plate analysis capabilities. RISA-3D was used to build the structural model and perform global analysis. One notable aspect about RISA is its transparency in displaying formulas, along with its ability to vividly present the interplay between demands and capacities.

RISA-3D was chosen for this project due to its impressive speed and reliability in terms of frame analysis. Notably, the software serves as an essential tool when it comes to adhering to strictquality assurance and quality control (QA/QC) processes.

The primary hurdle in engineering sculptures lies in the realm of aesthetics. Aesthetics assume a pivotal role, thus necessitating a delicate balance between structural support placement and artistic expression. This demands an engineering approach that adheres to a specific set of constraints driven by aesthetic vision. Moreover, additional challenges stemming from site conditions and foundation considerations further compound the task.

Ocean Boulevard Residence

Newport Beach, CA

Project Description

Lead Engineer | PBA Engineering

Company | Patel Burica and Asscociates Inc

Architect | Geoff Sumich Design

Contractor | Nicholson Construction

Software | RISAFloor | RISAFoundation |

ADAPT-Builder

This custom residence on Ocean Boulevard in Newport Beach consists of over 12,000 sq ft of livable space in three levels, including subterranean living space. The residence includes a living wall, an interior courtyard, a car elevator, and a glass walled pool visible from the subterranean living space. The roof deck, second floor, and main floor all provide 180 degree iconic Newport Beach views. All views are made possible by an innovative structural design that includes over 50’ of glass on at two levels of the front elevation.

How was RISA used?

RISAFloor was chosen for the gravity analysis of the upper two levels (which include steel and wood beams) to ensure accuracy in deflection calculations due to multiple large cantilevers. The main level is a conventionally reinforced concrete podium engineered using ADAPT-Builder. RISAFoundation was utilized for the foundation, which receives loads from the podium and includes retaining walls that retain soil and a glass walled pool.

The Pacific Bin

Monroe, WA

Project Description

Lead Engineer | Nabil Taha/Caleb Sale

Company | PSE Consulting Engineers, Inc

Architect | Dakota Kerkove |

Creative Touch Home Design

Contractor | Devon Loerop

Software | RISA-3D | RISAFoundation

The Pacific Bin is a custom residential project, constructed using ISO (shipping) containers. Five individual containers were used to create a 2-story home, complete with rooftop decks and panoramic windows that allow the residents to take in the awe-inspiring views. Three containers were utilized for the first floor structure, with two additional containers being used to construct the 2nd floor living space that cantilevers over the deck below.

How was RISA used?

RISA-3D was used to design the majority of this home. PSE Consulting modeled the entire, re-purposed shipping container house in RISA-3D, applying all gravity, wind and seismic loading to the full structure. Overall, RISA-3D allowed PSE Consulting to analyze the building as a whole (accomplishing their design intent) while still creating an affordable and attainable build. This allows PSE Consulting to make the most of the existing container structure while representing the modifications in an accurate manner. By modeling in RISA-3D, engineers can look at the interaction of the containers in the project as well as consider the deflections present for a more serviceable home. Computer modeling the full structure in RISA-3D also allows engineers to incorporate features such as the cantilevers seen in this project with minimal reinforcing of the container structure.

Ad Astra

Atlanta, GA

Project Description

Lead Engineer | Rbhu Engineering

Company | Rbhu Engineering

Architect | Megan Mosholder

Contractor | Megan Mosholder

Software | RISA-3D

Ad Astra is a public sculpture located in Atlanta, Georgia standing at 30 feet tall made of steel framing with structural cables. The new Microsoft campus was the original location of Atlantic Steel, a manufacturing plant located in the heart of Atlanta for almost 100 years. Closing in 1998, the plant affected more than 300 jobs. Today, Microsoft is bringing jobs back to the city but now with world-class environmental sustainability, which says a lot about the continuing reincarnation of the city of Atlanta. “Ad Astra”, Latin for “to the stars” not only represents Microsoft’s contribution to Atlanta but all the possibilities the major corporation represents.

This sculpture is dedicated to the artist’s best friend, Erin “Peach” Arthur, who died at the age of 45. Peach was diagnosed with stage 4 pancreatic cancer at the beginning of the Covid-19 quarantine (April 2020) and was actively dying while the artist was creating the drawings for ”Ad Astra” in March 2021. Her death has left a hole in the hearts of countless individuals. This sculpture is a testament to her memory.

How was RISA used?

Rbhu, over the course of a decade, has established a rich tradition of leveraging RISA-3D, augmented by their team of engineers with a remarkable collective experience of more than 15 years in hands-on usage of this software. Their reliance on RISA-3D has become a fundamental element of their daily operational landscape.

At the core of their analytical toolkit lies RISA-3D’s robust frame and plate analysis capabilities. Within the software’s digital realm, they meticulously craft intricate structural models, embarking on comprehensive global analyses that navigate the complexities of diverse design challenges. Among the many virtues of RISA lies its exceptional transparency in presenting complex formulas, providing a clear window into the intricate interplay between structural demands and their corresponding capacities.

Alisal Community School

Salinas, CA

Project Description

Lead Engineer | Joseph A. Vela

Company | Silver Creek Modular

Architect | Aedis Architects

Contractor | Silver Creek

Software | RISA-3D | RISAFoundation

The Alisal Community School project involves the construction of a two-story building spanning 38,116 sq ft to accommodate the expansion of an elementary school campus. The building comprises 64 individual steel moment frame structures (modules) that are connected to create a unified assembly. Each module is designed as a momentresisting space frame following the Light Modular Steel Moment Frame Buildings standard per CBC 2212A.

The floor frame assemblies are composed of a structural channel frame and joists, filled with lightweight concrete over b-deck to create a rigid floor diaphragm. On the other hand, the ceiling and roof frame assembly consists of a wide flange frame with cold formed joists, forming a flexible diaphragm.

How was RISA used?

To accurately simulate seismic loads, the RISA software was used, with specific adjustments made for different diaphragms. The seismic load generator creates the load for the rigid diaphragm by adjusting the R value, while the roof seismic load is directly applied to the joints of the frame for the flexible diaphragm.

In the RISA-3D modeling, vertical shear and tension/compression connections between modules are also taken into account. The connectors are represented as rigid links with pinned joints at the interface, and tension/compression bolts are modeled as close as possible to the column, typically spaced 8’ o.c. Shear bolts are placed at the midpoint of the beam, where the shear force is usually at its lowest.

The building’s foundation is also simulated in RISAFoundation, utilizing the design strip features and soil pressure checks in the critical footing areas. These features enabled us to effectively model and analyze this unique footing design.

Fortress Obetz

Obetz, OH

Lead Engineer | Nabil Taha

Company | PSE Consulting Engineers, Inc

Architect | SHP Leading Design

Contractor | Falcon Structures

Software | RISA-3D

Project Description

Fortress Obetz is a 6,500 seat stadium located at the former site of Columbus Motor Speedway in Obetz, Ohio. It is planned to be a community asset to host many events including; farmers’ markets, trade shows, sporting events, concerts, and other community activities. The stadium’s main function, will be as the home of the Major League Lacrosse team, Ohio Machine. Fortress Obetz Stadium is one of the most amazing projects PSE Consulting has been a part of. This large, one-of-a-kind structure is built completely out of over 100 individual shipping containers. The project is one of the largest shipping/cargo container construction projects in the United States, with the main structure serving as a “the hub” for the stadium, with videoboards, concessions, bathrooms and ticket sales all incorporated.

How was RISA used?

RISA-3D was used extensively to model the cargo containers used to construct the three-story building. PSE Consulting’s process involved a thorough analysis of container interactions to ensure adherence to safety standards, building codes, and structural viability in all dimensions.

Within RISA-3D, PSE Consulting’s modeling efforts included applying gravity, wind, and seismic loads. This approach maximized the utilization of the existing container structure while maintaining precision in representing modifications. Notably, RISA3D allowed for the exploration of container interactions within the project, while also assessing deflections. Leveraging computer modeling, PSE Consulting was not only able to create multiple models for distinct structures but also a unified model encompassing the entirety of the complex. This comprehensive modeling approach played a significant role in the project’s overall success.

Moe’s

Locust Grove, GA

Project Description

Lead Engineer | Smiley Structural Engineering

Company | Smiley Structural Engineering

Architect | Tedrow Design Group PC

Contractor | Jimmy Salvador

Software | RISA-3D | RISAFloor |

RISAFoundation

Welcome to your favorite fast-food restaurant! Located adjacent to the Tanger Outlets in Locust Grove, this 4,300 sq ft building includes a 2,600 sq ft Moe’s Restaurant and a 1,700 sq ft adjacent tenant space. The wood structure cladded in masonry veneer and EIFS resulted in an economical and efficient building that was simple to build for the contractor and met the client’s aesthetic requirements.

How was RISA used?

A seamless integration of software tools expertly managed the project’s intricacies. RISAFloor provided the ability to analyze gravitational forces for the structure and design its LVL girders. Pre-engineered roof trusses were specified on the project, so placeholders only were used in the RISAFloor model. RISA-3D took charge of the dynamic interplay of lateral forces, skillfully designing the shear walls. Meanwhile, the meticulous analysis of perimeter and interior foundations was deftly executed by RISAFoundation, cementing the project’s stability alongside its ambitious goals.

Impact Museums

Atlanta, GA

Project Description

Lead Engineer | Christopher Murphy

Company | Stability Engineering

Architect | Eric Kronberg

Contractor | Alan Glickson

Software | RISA-3D | RISAFloor |

RISAConnection

Converting a 30,000 sq ft industrial building into a public assembly area involved a 15,000 sq ft 2nd story addition. The existing roof framing was gradually removed to reinforce exterior walls. Wood framing and shear walls created the 2-story area upfront, while steel framing with braced frames supported the 1-story event space at the back. Noteworthy features include a full-height fire wall, distinction between 1-story and 2-story sections, sizable storefront openings in wood and masonry walls, and provisions for suspended A/V equipment from the event space roof.

How was RISA used?

RISAFloor was used to design the 1-story, steel-framed portion of the building, with RISAConnection used for typical connections and lateral frame design assistance. Local and global deflection limits were crucial to maintaining a roof that can accommodate new mechanical unit weights and A/V equipment, while providing acceptable deflection and performance. RISA-3D was used to design custom lateral frames at the front half of the building with timber posts and steel tie-rod X-bracing.

Large Paper Roll Structural Steel Rack System

Clinton, MS

Project Description

For this project, the engineering team generated two RISA-3D structural software models, one for single-sided and another for double-sided SK4000 Tubular Structural Rack Systems. The primary objective was to ascertain the maximum nodal displacements at the top of the frames.

Lead Engineer | Chris Aprile

Company | Steel King Industries Inc.

Software | RISA-3D

Both structural models incorporated P-Delta Analysis, a geometric non-linear effect that arises in structures under compressive loads and lateral displacement from environmental factors such as seismic forces, though wind loads were not applicable in this scenario, given the enclosed building environment.

The client specified a stringent requirement for maximum lateral displacement, mandating that it should not exceed 10mm (approximately 0.3937 inches) according to their AGV supplier’s guidelines. Recognizing the importance of adhering to these precise operational tolerances, the team conducted a comprehensive P-Delta Analysis. This approach was chosen because it accurately addresses non-linearities that can significantly impact displacements and other critical outcomes. In many instances, relying solely on linear static analysis may lead to underestimations compared to the more rigorous P-Delta (Non-Linear) Analysis.

How was RISA used?

RISA-3D was utilized because the project required very strict operational frame displacement tolerances that had to work in unison with the Automated Storage and Retrieval System (AS/RS). The maximum lateral displacement at the top of the structure could not exceed 10mm.

The structural model results from the LRFD load combination (LC2 – Gravity Critical) for the arms loaded on the single-sided SK4000 Tubular Structural Rack model analysis show that when all five shelf levels are product loaded to the maximum roll load of 2500 Kgs. (5,512 Lbs.) each, the cross-aisle (Global Z) lateral displacement is approximately 9.6mm (0.378 inches). This is less than the maximum lateral displacement requirement of 10mm (0.3937 inches). Next, the LRFD load combination (LC5 – DA Seismic Load) that includes seismic forces on the system, the down-aisle (Global X) lateral displacement is approximately 8.1mm (0.319 inches), and less than the maximum lateral displacement requirement of 10mm (0.3937 inches).

Lubber Run Community Center

Arlington, VA

Project Description

Lead Engineer | Clive Fox

Company | Springpoint Structural

Architect | VMDO Architects

Contractor | MCN Build

Software | RISA-3D | RISAFloor

This 55,000 sq ft recreation center was designed to replace an aged facility on the same site. The overall structural design made extensive use of concrete slabs and walls and the adjacent administrative programs were framed with wood columns, beams and tongue and groove roofs. The gymnasium was framed with tapered glulam beams and rectangular columns and T & G roof. All wood framing was supported on the concrete structure below. A 50,000 sq ft single story poured in place concrete parking garage was constructed immediately adjacent to the facility. Almost all concrete roofs serve as landscaped accessible spaces and the roof over the garage is fully landscaped with many facilities for sport and recreation for all ages. This project was one of 16 that won the AIA award for 2023.

How was RISA used?

The building and parking garage were designed separately with RISAFloor as they are separate structures. The tapered glulam beams were designed with RISA-3D. Most of the concrete roofs are flat plates and RISAFloor’s ability to design such structures with non-orthogonal column layouts was extremely useful. Extensive use was made of the shear cap utility. Most concrete is exposed and notwithstanding long spans (30’ in the garage) and heavy dead and live loads, all concrete is crack free thanks to RISA’s excellent compliance with the ACI code. The cantilevered running track in the gymnasium was designed in RISA-3D and the supporting concrete torsion beams were designed by hand. Some areas of the flat plates needed supplementary beams that were modeled in the Concrete Slabs Floor Type to obtain accurate load distribution.

Stockyards

Atlanta, GA

Project Description

The Stockyards Atlanta, situated in Atlanta, Georgia, is a historic district that has undergone a remarkable transformation. Once a bustling livestock market and slaughterhouse area, it has evolved into a dynamic mixeduse development, seamlessly blending the charm of its preserved historic buildings with modern amenities.

Lead Engineer | Christopher Murphy

Company | Stability Engineering

Architect | Patrick Johnson

Contractor | Stewart Teegarden

Software | RISA-3D | RISAFloor | RISAConnection

This project involved the modification of a pre-existing 20,000 sq ft, single-story industrial building, complete with a partial basement. The ambitious endeavor aimed to convert this space into a versatile multi-use office and commercial facility, incorporating an entirely new 12,000 sq ft second story. The structural design for this undertaking proved to be intricate and demanding.

Significant attention was directed towards stiffening and reinforcing the building’s shell structure. This effort was particularly crucial at the basement level, where the foundations had suffered considerable erosion over time, leaving certain sections unsupported. To accommodate the new second story, portions of the existing roof framing required partial demolition to make way for the new floor and terrace framing, further exemplifying the intricate nature of this project.

How was RISA used?

RISAFloor and RISA-3D were used to design the 2nd story floor and terrace framing, as well as the new roof framing. Pitched cantilevered roof framing was designed with moment connections in one direction for lateral resistance. On the main floor, custom moment frames with partial braced-frames at one end were used to accommodate the open floor plan. Tie-rod X-bracing frames were used in the orthogonal direction for lateral resistance. RISA-3D and RISAConnection were crucial in the design of these lateral systems.

Riverwalk Phase II

Lincoln, NH

Project Description

Lead Engineer | Lily Beyer

Company | Summit Engineering

Architect | Robert Martel

Contractor | DHI Inc

Software | RISA-3D | RISAFloor |

RISAFoundation | RISAConnection

Riverwalk Phase II is a 5 story steel framed building, extending the existing Phase I project. It included composite steel floor framing, and CFMF roof trusses to support the iconic standing seam red roof. Three cupolas mark the corners and center of the building. The basement level includes a spa, conference center, and various back of house functions. The first floor is a mix of public space and private units, and the upper floors are primarily private rooms as well. Large movable partitions in the conference room required additional heavy beams to control deflection. The winery space on the ground floor included two story tall fermentation tanks, which were installed in the building during construction with the remaining steel erection completed around them.

The column grid is fairly tight, at 14 ft, allows for shallow framing that provides substainial ceiling heights. The fourth floor is above the eave, with a steel level above supporting CFMF roof trusses and CFMF rafters. This roof expanse is interrupted by many dormers, giving ample space for the fourth floor units. A concrete catwalk down the center of the truss space allows for easy maintenance access. Due to the length and layout of the building, it was determined that an expansion joint was required part way down the building. As a result, each side was treated as a separate structure and appropriate expansion joint covers were provided and the corridor and exterior walls.

How was RISA used?

The building design was largely completed in RISAFloor for gravity framing, and the lateral analysis in RISA-3D. The structural engineering drawings were completed in Autodesk Revit, with the RISA-Revit link used to move the beam designs back and forth. This allowed the complicated column grid to be laid out in Revit, in coordination with the architect’s model, and the beam design and layout to be completed in RISA.

RISA-3D was used to complete the lateral design of the building, including wind and seismic design. Due to the very large roof, an additional level was modeled in RISA to account for the CFMF truss roof. Initially the sloped roof tools were used, but as the model was refined this was dropped in favor of having the full cupola height included to account for the wind loads on the highest steel being transferred to the floors below.

RISAFoundation allowed the complicated combined footings to be modeled at the interior corridor brace lines, as well as isolated footings at the exterior of the building. These RISAFoundation slab elements allowed the bearing pressure and concrete design to happen at once. A combined footing with a narrow offset was used along the existing building to ensure the stability of the existing foundation during construction.

RISAConnection was used to design baseplates, and ensure geometric restrictions were reasonable before sending the model to the detailer. The steel detailer used SDS2 for design, but incorporated the Revit model to validate their modeling.

REI Athens

Athens, GA

Project Description

Lead Engineer | Christopher Murphy

Company | Stability Engineering

Architect | Daniel Maas

Contractor | Bailey Construction

Software | RISA-3D | RISAFloor |

RISAConnection

Structural design of a 16,000 sq ft 1-story retail development for a new REI Co-op location in Athens, GA. This project entailed the demolition of an existing wing at the end of an existing shopping mall to make way for a new building shell adhering to REI brand standards. Structure consists of steel-framed roof supported by steel columns, CMU exterior walls, and mix of shallow and deep foundations abutting the existing building, including a 14ft tall retaining wall at the rear side to accommodate surrounding grade. Expedited construction administration services were provided to deliver the building shell on an 8-month timeline from groundbreaking to tenant move-in.

How was RISA used?

RISAFloor was critical for designing efficient roof framing, in light of a shortage of long-span steel joists. Wide flange steel members were used for roof joists and beams throughout the footprint of the building, with REI brand equipment suspended from the roof at multiple locations. Lateral force resisting system included a mix of CMU reinforced shear walls, steel braced frames, and steel moment frames along the storefront.

Rihanna Super Bowl Halftime Show

2023

Glendale, AZ

Project Description

Lead Engineer | Ryan Kunkel

Company | TAIT Towers

Contractor | TAIT Towers

Software | RISA-3D

The Super Bowl is the most watched television event in the United States every year and the halftime show, is the most prestigious headlining opportunity for any musical act. Rihanna’s Super Bowl halftime show on February 12, 2023, was highly anticipated and marked her first performance since the 2018 Grammys. Suspended on seven platforms ranging from 15 to 60 feet above the field, Rihanna and her dancers created a stunning 13-minute musical spectacle. The LED-lit platforms shifted positions as she performed her hits, with an oblong red stage below serving as the centerpiece.

The intricate rigging system for Rihanna’s halftime performance was meticulously designed, engineered, fabricated, and installed by TAIT Towers. The team of mechanical and structural engineers at TAIT analyzed the entire system using RISA-3D. The elaborate system was then meticulously reviewed and approved by Clark Reder Engineering, a third party engineering partner on the project.

How was RISA used?

RISA-3D was utilized to engineer the performance platforms, counterweight system, and redirect trusses. RISA was chosen for the Super Bowl analysis as the design was iterating quickly and RISA supports quick geometry updates which was very helpful. In addition, RISA handles inputs of many load cases and combinations well which was another advantage.

In the last 8 years, TAIT has been able to figure out a lot of creative workflows in RISA to model things like rigging systems. As a result, using RISA-3D has allowed TAIT to create ”custom tools” which can then be applied directly to the analysis and design of rigging systems, furthering the usefulness of RISA.

Champion Ranch

Rochelle, TX

Project Description

Lead Engineer | Mark A. Thomey

Company | Structural Engineering

Architect | Design Visions of Austin

Contractor | Bounds Commercial Construction

Software | RISA-3D | RISAFoundation

The Champion Ranch Trophy Room project was the vision of the owner for a world class showplace destination for hunting, fishing and other outdoor experiences. Located in the hill country of west Texas, the building design called for an open concept, steel framed structure that could accommodate all the artificial topography, wall murals, display of mounted animals from around the world, and luxurious suites while providing high end, on-site entertainment for its guests like concerts, dining, and gaming. Structural design challenges were abundant from the start of the project. The architectural concept for the building included very complex geometry such as skewed/curved beams, spiral staircases, a circular observation tower with elevator, multiple floor levels, a movie theater with stadium seating, and the blending of multiple structural materials.

The core of the building included a one hundred seventeen feet wide clear-span, steel frame with hot-rolled columns and roof trusses/beams. Secondary roof framing was composed of light-gage, cold-formed Z-purlins and steel decking. Lean-to frames ran along the front and back sides to provide covered entry access and kitchen/staff quarters. Long-span floor trusses were required so large, column free spaced could be achieved.

Floors were framed with hot-rolled beams, light-gage, cold-formed C-joists and open web steel joists. Interior columns were a combination of round and square HSS sections. Longitudinal bracing used a combination of WT’s for horizontal, and HSS sections for vertical orientations. RISA-3D was used extensively for analysis and design of the structure.

How was RISA used?

RISA-3D was the workhorse for modeling, analysis, and design of the superstructure of the building. The flexibility and power of RISA’s graphical capabilities for seeing the structural interconnectivities and applying loads aided immensely, as the architectural layout seemed to change from week to week during the course of the project. Columns, bracing, and beams moved numerous times to accommodate wall offsets from floor to floor, wall openings, stair access, additional framing for HVAC equipment, and interior design considerations. Drafting and detailing efforts were greatly assisted by the RISA-Tekla link. Once modeling and design were completed in RISA, the results were seamlessly transferred to Tekla for producing engineering drawings and performing steel detailing.

All the bracing connections, as well as the many moment connections in the floor framing, were designed in RISAConnection. It was also used to design and provide details for all of the standard, or typical, connections throughout the framing system, e.g. single plate and clip angle connections for beam-to-beam, beam-to-column, and column base plate applications.

Once the superstructure analysis was completed, all data was transferred into RISAFoundation for foundation design. The foundations consisted of a combination of isolated, spread footings, mat foundations, and an independent slab-on-grade. Again, the power, flexibility, and interoperability of all the RISA software programs made it much easier to accommodate changes in the model and then reverify the integrity of all the structural components.