Segmental Retaining Walls

SPECIFICATION GUIDE

Segmental Retaining Walls

SPECIFICATION GUIDE

Plaza Salt + Pepper, London

LandmarkÂŽ Cashel, Galway

Segmental Retaining Walls Specification Guide

Introduction

CONTENTS 1. INTRODUCTION Intro to Segmental Retaining Walls

04

2. SEGMENTAL RETAINING WALL RANGES

3. DESIGN INFORMATION + ADVICE Wall Types

44

Machine Install (Vertica)

48

Corner Details

52 55

Anchor Vertica速

10

Curve Details

Anchor Landmark速

18

Handrails + Barriers

58

Anchor Diamond速

26

Small Wall Inspiration

60

Anchor Bayfield速

34

4. TECHNICAL INFORMATION Advice + Guidance

64

The Environment

66

Design + Specification Services

68

AG.UK.COM

Section 1

Introduction

Introduction 02 | 03

Segmental Retaining Walls Specification Guide

Introduction to Segmental Retaining Walls

AG ANCHOR RETAINING WALLS The best system for the best solution

When designing and specifying a retaining wall, there are many solutions available to engineers – such as cast in-situ, gabion, stone, gravity walls and hybrid systems.

While these can all be made to work well, each option comes with challenges – some are timeconsuming to build and some are difficult to engineer safely. Some types can only be built with a reverse angle, while others are expensive to implement. Many solutions also lack the aesthetic finesse that architects and landscaping designers require.

AG manufacture and supply segmental retaining walls as we believe, simply, that these offer the best solution for engineers.

And amongst the many ranges of segmental retaining walls available today, AG’s Anchor system offers what we feel is by far the bestengineered option – providing a

range of safe, flexible, cost-effective solutions that let construction professionals produce superior walls not just quickly, but also beautifully, within any project. AG have produced Anchor systems for 1,000s of walls, big and small, throughout the UK and Ireland – which means we have the experience and knowledge to help.

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Section 1

Introduction

AG / Anchor Segmental Retaining Walls

Introduction to Segmental Retaining Walls

THE ADVANTAGES

AG segmental retaining walls versus other types of walls

They’re flexible

They’re durable

Segmental retaining walls are generally the most cost-effective solution as they usually require less complex engineering. So no concrete footings, steel fixers, shuttering or special backfill – and a reduced need for scaffolding.

Labour and equipment costs tend to be lower too.

Curves and grade changes are easy to build in. Large heights are much easier to engineer because the geogrid built into the wall backfill stabilises the soil behind the wall.

With the correct design and soil reinforcement, walls in excess of 40 feet can be accomplished.

Segmental retaining walls, unlike many other types of wall, are tolerant to settlement and movement.

They’re ‘site contained’

They’re feature-friendly

They’re safer

Backfill material placed behind the retaining wall can often simply be the material excavated from the site itself. This saves expense, time and reduces CO2 emissions caused by transporting large amounts of material to and from your site.

The Anchor system makes curved walls as easy to build as straight walls – but it’s also easy to add steps, lights, seating and terraces where required in garden installations.

Unlike many other alternatives, Anchor retaining wall systems cannot be climbed easily by children, making them the safer choice for public areas.

04 | 05

They’re cost effective and simple to build

Segmental Retaining Walls Specification Guide

Introduction to Segmental Retaining Walls

THE ADVANTAGES

AG segmental retaining walls versus other segmental retaining wall systems

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Durability

Design

Innovation

AG Anchor segmental retaining wall blocks are manufactured from locally sourced, high grade aggregates using the latest computerised systems. Durability and performance is assured by meeting or exceeding targets for crushing strength and water absorption.

Across the AG Anchor range, all our products are carefully designed to complement their environment – from Bayfield® in domestic gardens right through to largescale commercial installations of Landmark® and Vertica®. The closed face design also ensures that rodent infestations are extremely unlikely.

Products like our Landmark® system feature a unique mechanical connection between the blocks, PVC locking bar and the geogrid reinforcement, permitting extremely high loading conditions – providing suitability for all retaining wall applications from landscaping to heavy engineering.

Efficiency

Environment

Global expertise

All AG Anchor blocks use capping blocks that are shaped asymmetrically (tapered) – making capping straight or curved walls much more efficient as the shape of the capping piece minimises the need for cuts.

All AG Anchor segmental retaining wall blocks are produced in the UK from locally sourced materials and manufactured with 100% harvested rain water and 100% renewable energy in the production process.

Anchor retaining wall systems are manufactured in Ireland by AG under license from Anchor Wall Systems. This combined expertise in block design, block manufacture and engineering design offers a unique and unbeatable product range, quality and service available throughout the UK and Ireland.

Section 1

Introduction

AG / Anchor Segmental Retaining Walls

Our Vertica® and Landmark® systems are BBA and HAPAS approved.

Introduction to Segmental Retaining Walls

BBA + HAPAS CERTIFICATION What are BBA + HAPAS?

What is HAPAS?

What is BBA certification?

BBA is the British Board of Agrément, an organisation that tests, inspects and approves products, systems and installers within the construction industry.

BBA’s certification and inspection services are recognised by building control, local authorities, industry insurers and the key construction trade associations in the UK. BBA make regular inspections and quality audits at AG and have evaluated and overseen all the performance testing for these retaining wall systems.

How long have the systems been BBA certified?

Anchor’s Vertica® system gained BBA certification in 2003 and the Anchor Landmark® system followed in 2004.

HAPAS is the Highway Authorities Product Approval Scheme – a scheme administered by BBA in conjunction with the UK Highways Authorities and other industry bodies. It was established to provide a nationally recognised approval scheme for innovative products and systems used in highway works.

How long have these systems been HAPAS certified?

The BBA approval of both Anchor Landmark® and Anchor Vertica® systems was recently extended in June 2017 to full HAPAS certification.

What are the benefits of HAPAS certification?

Anchor Vertica® and Landmark® HAPAS (BBA) certified retaining wall blocks have a minimum 28 day compressive strength of 40 N/mm2 (unlike most competing masonry units which are manufactured to 10.5 N/mm2 and standard Vertica® which is manufactured to 24 N/ mm2). The certified block systems also satisfy the durability requirement of class XF2 in accordance with BS 8500-1: 2015 – their high compressive strength and high cement content mean that they will not degrade due to the action of de-icing salts in the same way as units manufactured to 10.5 N/mm2.

Design in accordance with BS 8006-1:2010, Annex B delivers a design life of 120 years – giving specifiers complete assurance that the block will meet the design life expectations for the development of Design Codes Highway Works structures.

Durability and performance is further assured by AG’s agreed BBA quality control procedure, which includes factory and testing audits and end user assessments. Further details can be obtained from our Technical Specification Department.

06 | 07

HAPAS certification shows compliance with quality standards and engineering performance when Anchor Landmark® and Vertica® systems are used on critical projects. The certification demonstrates that these systems meet a much higher standard than most ordinary retaining wall systems, with the minimum compressive strength of AG’s HAPAS approved systems being approximately 75% higher than many commonly used block systems.

Standards + Performance

Segmental Retaining Walls Specification Guide

Segmental Retaining Walls AG.UK.COM

Section 2

Anchor Segmental Retaining Walls

Segmental Retaining Walls

SEGMENTAL RETAINING WALL RANGES Anchor Vertica速

10

Anchor Landmark速

18

Anchor Diamond速

26

Anchor Bayfield速

34

XX 08||XX 09

Segmental Retaining Walls Specification Guide

Anchor Vertica® retaining walls

DRY-BUILD RETAINING WALLS WITH A NEAR VERTICAL APPEARANCE

Anchor ® Vertica The Anchor Vertica® system is designed for steep, sloping hillsides and other traditionally difficult installation areas – but the project applications for Anchor Vertica® are almost endless.

Vertica® walls can be built to virtually any height in incredibly tight spaces thanks to patented, built-in alignment locators and a near vertical rise – resulting in less excavation and land loss.

Typically used with geosynthetic reinforcement, Vertica® blocks meet or exceed industry standards for strength and durability. Please see page 46 for information on an Anchorplex™ Vertica® installation.

Anchor Vertica® is available in 2°, 4° and 7° face angles, two finishes – Straight or StoneCut® – and a variety of warm earth tone colours. AG have introduced a new ‘double sided’ block to the Vertica range which enables a vertical wall to be constructed without mortar with the same textured finish on both sides.

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Vertica® is also available for machine installation, which can make the installation process significantly faster. Visit professional.ag.uk.com/machineinstall to see a video demonstration.

Section 2

Retaining Walls

Vertica®

Introduction

Anchor Vertica® retaining walls 10 | 11

Segmental Retaining Walls Specification Guide

Anchor Vertica® retaining walls

Anchor Vertica® 1 Anchor Vertica® Basalt, Dungannon

5 Anchor Vertica® Basalt, Installation

2 Anchor Vertica® Basalt, Craigavon Hospital

6 Anchor Vertica® Basalt, Wexford

3 Anchor Vertica® Basalt, Wexford

7 Anchor Vertica® Basalt, Derry/L’Derry

4 Anchor Vertica® Canelletto, Wexford

8 Anchor Vertica® Canelletto, Newtownabbey

2

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1

3

Section 2

Retaining Walls

Vertica®

Projects

Anchor Vertica® retaining walls

4

7

5

8

12 | 13

6

Segmental Retaining Walls Specification Guide

Anchor Vertica® retaining walls

Anchor Vertica®

Dry-build retaining walls with a near vertical appearance

COLOURS + FINISHES

BASALT

CASHEL

CANELLETTO

CORRIB

STRAIGHT CUT FINISH (BASALT)

STONE CUT FINISH (BASALT)

Frost Resistant

<1.0m No Reinforcement

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Section 2

Retaining Walls

Vertica®

Product Information

438 x 100mm

PROFILES

200 x 75mm

Anchor Vertica® retaining walls

457 x 200mm

303

254 175

The stone face is naturally textured to give the wall a weathered appearance.

75

100

330

438 200 SHORT CUT CAP

CAP BLOCK 280

457

200

200

228

457

457

CORNER BLOCK

DOUBLE SIDED BLOCK

see the benefits on page 17 280

280

350

200

200

350

457

457

STONE CUT

STRAIGHT CUT

MACHINE INSTALL Anchor Vertica® can now be installed mechanically using a special clamp in conjunction with an excavation digger. Segmental retaining wall ‘machine installation’ is exclusive to AG – the benefits include: A significantly reduced cost of installation onsite and reduced labour costs.

•

Significantly faster installation than traditional methods of segmental retaining wall installation.

•

Vertica® can be packaged to suit machine installation at no extra cost.

AG’s SRW ‘machine installation’ is the safest option and the least likely to cause injury: the safest way to lift and install a product is important with CDM (the legal regulator for construction health and safety). The specifier has a duty of care to select the installation method least likely to result in human injury.

See page 48 for more information. Please contact our Technical Specification Department for more information.

14 | 15

•

•

Segmental Retaining Walls Specification Guide

Anchor Vertica® retaining walls

Anchor Vertica®

Dry-build retaining walls with a near vertical appearance

STOCK INFORMATION Product type

STANDARD BLOCK 4°**

Length (mm)

Depth (mm)

Height (mm)

457

280

200

Available Finishes

In Stock

Stone Cut Straight Cut Stone Cut

DOUBLE SIDED BLOCK

457

280

200

CORNER BLOCK

457

228

200

Straight Cut

CAP BLOCK

438*

254

100

Straight Cut

SHORTCUT CAP

200†

330

75

Straight Cut

Straight Cut

Yes

Available Colours

Cashel / Corrib

MTO

Basalt / Canelletto / Cashel / Corrib

MTO

Basalt / Canelletto / Cashel / Corrib

Yes

Yes MTO Yes MTO

Packs per 8 wheeler

Packs per unit lorry

38

1.79

10

IRE 14 / GB 15

45

40

1.7

10

IRE 14 / GB 15

N/A

40

42

2

12

IRE 14 / GB 14

N/A

48

20

0.94

14

IRE 20 / GB 22

N/A

120

10.3

1.236

10

IRE 14 / GB 21

Units per pack

4.1

45

4.1

Unit weight (kg)

Basalt / Canelletto

MTO

MTO

Weight per pack (t)

m2 per pack

Basalt / Canelletto Cashel / Corrib Basalt / Canelletto Cashel / Corrib Basalt / Cashel / Canelletto Corrib

* The Cap Block ‘short side’ 303mm in length. ** Machine install is available for this product. † The ShortCut Cap ‘short side’ 175mm in length.

N / A – Not applicable.

MTO – Made to order (minimum quantity required).

BBA Approved Vertica is available as MTO. Stone Cut and Straight Cut blocks are available MTO as 2º and 7º.

Frost Resistant

<1.0m

INSTALLATION DATA

No Reinforcement Minimum inside radius (to back of block on bottom course)

Minimum outside radius (to back of block on bottom course)

Tolerances on all dimensions (mm)

Blocks

Set back / Face angle (degrees)

STONE CUT BLOCK

4°

2.4m

1.8m

±2mm

Stone cut

stretcher

10.9

STRAIGHT CUT BLOCK

4°

2.4m

1.8m

±2mm

Straight cut

stretcher

10.9

stretcher

10.9 N/A

Face finish

Face geometry

no. per m2 / lm

DOUBLE SIDED BLOCK

0°

N/A

N/A

±2mm

Stone cut / Straight cut

CORNER BLOCK

N/A

N/A

N/A

±2mm

Straight split

stretcher

CAP BLOCK

N/A

N/A

N/A

±2mm

Straight split

stretcher

2.7

SHORTCUT CAP

N/A

N/A

N/A

±2mm

Straight split

stretcher

5.4

Stone Cut and Straight Cut blocks are available MTO as 2º and 7º.

N / A – Not applicable.

MANUFACTURING

CERTIFICATION

Anchor segmental retaining wall blocks are manufactured from locally sourced, high grade aggregates. Using the latest computerised mixing systems ensures colour and strength consistency. The naturally textured finish of the Vertica® range is produced using a computercontrolled manufacturing process. PLANT OF MANUFACTURE (POM): Made at our Fivemiletown production plant.

ISO 14001 ISO 9001 OSHAS 18001 CE Marking

AG.UK.COM

Environmental Management.

Quality Management.

Occupational Health and Safety Management.

Download our Declaration of Performance (DOP) data at: www.ag.uk.com/cemarking HAPAS + BBA The Vertica® Wall System is HAPAS and BBA Roads + bridges certified for use in conjunction with Enkagrid PRO geogrids. Agreement Certification No. 17/H268. Download data at: professional.ag.uk.com/ products/retaining-walls/anchor-vertica#tab3

SPECIFICATION REFERENCE: NBS PLUS: 45-25-66/320 Precast concrete interlocking blocks D41 Crib walls, gabions and other gravity retaining walls – 310 DRYSTACK INTERLOCKING MASONRY

Section 2

Retaining Walls

Vertica®

Product Information

Vertica®

Vertica®

Vertica®

standard block

double sided block

BBA approved

457 x 200mm

438 x 100mm

Vertica® Standard + Double Sided 24N/mm2 blocks are suitable for any project not requiring Highways Authority approval.

Vertica® BBA blocks meet the requirements of the Highways Authority as set out in the D.C.H.W. handbook.

STANDARDS + PERFORMANCE

STANDARDS + PERFORMANCE

Our segmental retaining wall products are regularly tested to record important physical characteristics and to comply with product specific performance criteria. The durability and performance of Anchor blocks is assured by meeting or exceeding targets for compression strength and water absorption.

The Anchor Vertica® BBA certified retaining wall block has a minimum 28 day compressive strength of 40N / mm2, and satisfies the durability requirement of class XF2 in accordance with BS 8500-1:2015.

Product Type Manufactured to Efflorescence

Dry-build retaining walls with a ‘naturally textured’ finish BS EN 771-3:2011+A1:2015 Specification for masonry units.

State-of-the-art factory controlled vapour curing significantly reduces this naturally occurring chemical reaction

200 x 75mm

Anchor Vertica® retaining walls

Vertica® is available in both a standard and BBA approved unit.

When designed in accordance with BS 8006-1: 2010, Annex B, the design life of an Anchor Vertica® BBA wall is 120 years.

Durability and performance of the Anchor Vertica® BBA retaining wall block is assured by AG, having agreed with the BBA a quality control procedure. Further details can be obtained from our Technical Specification Department.

If you need further assistance with any of these products please consult our Technical Specification Department.

FEATURES + BENEFITS

SUSTAINABILITY Energy Use Water Used Recyclable Manufacturing

100% renewable 100% rain water harvesting 100% of this product can be recycled Produced in the UK from locally sourced materials

Recycled Aggregate Content: 65% Waste Wood + Plastic: 100% recycled Carbon Footprint We have a new state-of-the-art washing plant which enables AG to produce walling from 100% recycled waste aggregate. Please contact our Technical Specification Department if you are interested in specifying such a product.

BREEAM ‘A’ Rating – in accordance with the BRE Green Guide to Specification.

GRAVITY / ENGINEERED Gravity (max 1m) Engineered (above 1m)

LICENCE Anchor blocks are manufactured under licence from Anchor Wall Systems.

ADVICE + GUIDANCE

• The 4º block has anti-climb benefits – designed with playgrounds in mind.

• The Stone Cut finish uses patented technology to create a ‘crunched’ finish, similar to natural stone.

• Variety of warm earth tone colours available and a natural textured finish.

• Mortarless and pinless – built with no mortar or concrete, the unique dry build locking system allows fast track construction in all weathers. This means quicker installation rates than traditional brick and blockwork.

• Features a patented locating lug that acts as a guide to ensure accurate alignment and precise set back every time.

• Suitable for all retaining walls – from low height landscape to tall commercial walls.

• The capping block is shaped asymmetrically (tapered), making capping straight or curved walls much easier.

VERTICA® DOUBLE SIDED BLOCK New to our Vertica® range is a ‘double sided’ block, which enables a 0º / vertical wall to be constructed without mortar with the same textured finish on both sides: • The Double Sided block is recommended for finishing the final course of a normal Vertica® retaining wall when both sides would be visible.

• When used in conjunction with a design, the Double Sided block can be used as a parapet wall or crash barrier - see page 47.

• To create an aesthetically pleasing ‘stop end’ block simply split the Double Sided block in half for a normal Vertica retaining wall - an alternative to curving your wall into the bank.

• The Double Sided block can also be used as a temporary barrier, providing way leave access.

• The Double Sided block can be used as a self-supporting, freestanding, mortarless wall – not retaining.

16 | 17

For advice and guidance on ordering, installation, etc – see pages 64 for more information.

• A distinctive design allows taller wall construction in incredibly tight spaces. Use in developments or where space is at a premium.

Segmental Retaining Walls Specification Guide

Anchor Landmark® retaining walls

HIGH PERFORMANCE POSITIVE MECHANICAL CONNECTION RETAINING WALL

Anchor ® Landmark Anchor Landmark® is a HAPAS approved, positive mechanical connection retaining wall system that takes performance to new heights.

Suitable for high performance under extreme loading conditions, it’s designed with a unique locking connection between the block face and geogrid to offer unparalleled connection strength – so it’s suitable for even the most challenging projects.

The Anchor Landmark® system features a portrait-orientated ‘riven stone’ face of slightly varying depths to form a highly aesthetically-pleasing retaining wall solution.

Built with no mortar or concrete, the unique dry-build locking system of Landmark® allows fast-track construction in all weathers, meaning quicker installation rates than traditional brick and blockwork.

For more information on the positive connection system, see page 46 for details.

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Section 2

Retaining Walls

Landmark®

Introduction

Anchor Landmark® retaining walls 18 | 19

Segmental Retaining Walls Specification Guide

Anchor Landmark® retaining walls

Anchor Landmark® 1 Anchor Landmark®

4 Anchor Landmark® Basalt, Banbridge

2 Anchor Landmark® Basalt, Sunday Hill, Southampton

5 Anchor Landmark® Canelletto, Belfast

3 Anchor Landmark®

6 Anchor Landmark® Canelletto, Belfast

1

AG.UK.COM

2

Section 2

Retaining Walls

Landmark®

Projects

Anchor Landmark® retaining walls

4

5

6

20 | 21

3

Segmental Retaining Walls Specification Guide

Anchor Landmark® retaining walls

Anchor Landmark®

High performance positive mechanical connection retaining wall

COLOURS + FINISHES

BASALT

Frost Resistant

CASHEL

CANELLETTO

A UNIQUE MECHANICAL CONNECTION

is capable of withstanding loads that well exceed the reinforcement’s allowable design strength.

Unlike other segmental retaining wall systems that rely on gravity and frictional forces to connect block and reinforcement materials, the Landmark® system features a true mechanical connection of the reinforcement material to the block. This mechanical connection is achieved by a lock bar, made from an engineered polymer, that fits snugly into a channel formed in the block and secures the reinforcement product.

Tenacious Connection Capacity

The unit’s specially designed locking system allows the assembled wall to more reliably withstand the forces of earth pressures, surcharges and seismic loads. Tests demonstrate that the Landmark® connection system

While system connection strength controls the design of most segmental retaining wall systems on the market today, the Landmark® system changes the status quo.

With this system, the lock bar mechanically secures the soil reinforcement products to the Landmark® units. A carefully engineered channel accommodates the specific shape of the lock bar and a range of reinforcement product types.

Connection capacity tests performed on the Landmark® system in combination with a range of reinforcement products prove that the system’s mechanical connection maintains a firm grip on reinforcement materials.

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Lateral loads applied to the back of a segmental retaining wall system place the reinforcement in tension.

Tension causes the lock bar to mechanically secure the reinforcement product to the unit. Increased tension in the reinforcement causes an increase in the securing efficiency of this true mechanical connection system.

Section 2

Retaining Walls

Landmark®

Product Information

200 x 190mm

PROFILES

200 x 75mm

Anchor Landmark® retaining walls

200 x 380mm

175

75

330

1,000

200 LOCK BAR

SHORT CUT CAP

300 / 320

180

380

380

300 / 320

200

200

FULL HEIGHT TAPERED BLOCK

FULL HEIGHT BLOCK

180

180

300 / 310

190

190

300

200 200

FOUNDATION BLOCK

22 | 23

HALF HEIGHT BLOCK

Segmental Retaining Walls Specification Guide

Anchor Landmark® retaining walls

Anchor Landmark®

High performance positive mechanical connection retaining wall

STOCK INFORMATION Product type

Width (mm)

Depth (mm)

Height (mm)

In Stock

Available Colours

m2 per pack

Units per pack

Unit weight (kg)

Weight per pack (t)

Packs per 8 wheeler

Packs per unit lorry

FULL HEIGHT BLOCK

200

300 / 320†

380

MTO

Basalt / Cashel / Canelletto

3.41

45

39

1.85

10

IRE 14 / GB 15

TAPERED FULL HEIGHT BLOCK

200

300 / 320†

380

MTO

Basalt / Cashel / Canelletto

3.41

45

39

1.75

10

IRE 14 / GB 15

HALF HEIGHT BLOCK

200

300 / 310†

190

MTO

Basalt / Cashel / Canelletto

1.37

36

23

0.828

14

IRE 22 / GB 24

FOUNDATION BLOCK

200

300

190

MTO

Basalt / Cashel / Canelletto

N/A

48

22

1.06

10

IRE 16 / GB 22

SHORTCUT CAP

200‡

330

75

Yes

Basalt / Cashel / Canelletto

N/A

120

10.3

1.236

10

IRE 14 / GB 21

MTO – All Landmark® colours are made to order (minimum quantity required) (†) To give the staggered appearance Anchor Landmark® has two different sized blocks. The depth at top and bottom of block varies due to the inclined split face. (‡) The ShortCut Cap short side is L 175mm.

INSTALLATION DATA Frost Resistant

Blocks

Set back / Face angle (degrees)

Minimum inside radius (to back of block on bottom course)

Minimum outside radius (to back of block on bottom course)

FULL HEIGHT BLOCK

25mm (3.8°)

2.10m

2.45m

Straight cut

soldier

13.2

TAPERED FULL HEIGHT BLOCK

25mm (3.8°)

2.10m

2.45m

Straight cut

soldier

13.2

HALF HEIGHT BLOCK

12mm (3.8°)

2.10m

2.45m

Straight cut

soldier

26.3

FOUNDATION BLOCK

N/A

N/A

N/A

Straight cut

soldier

0.019

SHORTCUT CAP

N/A

N/A

N/A

Split cut

stretcher

5.4

Face finish

Face geometry

no. per m2 / lm

AG.UK.COM

MANUFACTURING

CERTIFICATION

Anchor segmental retaining wall blocks are manufactured from locally sourced, high grade aggregates. Using the latest computerised mixing systems ensures colour and strength consistency. The naturally textured finish of the Landmark® range is due to the most modern computercontrolled manufacturing process. PLANT OF MANUFACTURE (POM): Made at our Fivemiletown production plant.

ISO 14001 ISO 9001 OSHAS 18001 CE Marking

Environmental Management.

Quality Management.

Occupational Health and Safety Management.

Download our Declaration of Performance (DOP) data at: www.ag.uk.com/cemarking

HAPAS

Landmark® Wall System is HAPAS Roads + Bridges certified for use in conjunction with Enkagrid PRO geogrids. Agreement Certification No. 04/R138.

Download data at: professional.ag.uk.com/products/ retaining-walls/anchor-landmark#tab3

SPECIFICATION REFERENCE: NBS PLUS: 45-25-66/320 Precast concrete interlocking blocks D41 Crib walls, gabions and other gravity retaining walls - 310 DRYSTACK INTERLOCKING MASONRY

Section 2

Retaining Walls

Landmark®

Product Information

STANDARDS + PERFORMANCE

FEATURES + BENEFITS

Our segmental retaining wall products are regularly tested to record important physical characteristics and to comply with product specific performance criteria. The durability and performance of Anchor blocks is assured by meeting or exceeding targets for crushing strength and water absorption.

• Portrait orientated ‘riven stone’ face of slightly varying depths.

If you need further assistance in this respect please consult our Technical Specification Department.

Product Type Manufactured to Efflorescence

High performance positive mechanical connection retaining wall BS EN 771-3:2011+A1:2015 Specification for masonry units.

State-of-the-art factory controlled vapour curing significantly reduces this naturally occurring chemical reaction

200 x 75mm

• Built with no mortar or concrete, the unique dry-build locking system allows fast-track construction in all weathers – that means quicker installation rates than traditional brick and blockwork.

• The unique mechanical connection between the Anchor Landmark® blocks, PVC locking bar and the geogrid reinforcement permits extremely high loading conditions; Anchor Landmark® is therefore suitable for all retaining wall applications from landscape to heavy engineering.

• Generally, the Anchor Landmark® system is used for tall engineered walls and is BBA certified up to 10m (although structures exceeding this height have been designed and constructed).

• HAPAS Roads + Bridges certified for use in conjunction with

SUSTAINABILITY Energy Use Water Used Recyclable Manufacturing

200 x 190mm

Anchor Landmark® retaining walls

200 x 380mm

Enkagrid PRO geogrids.

100% renewable 100% rain water harvesting 100% of this product can be recycled Produced in the UK from locally sourced materials

Recycled Aggregate Content: 65% Waste Wood + Plastic: 100% recycled Carbon Footprint We have a new state-of-the-art washing plant which enables AG to produce walling from 100% recycled waste aggregate. Please contact our Technical Specification Department if you are interested in specifying such a product BREEAM ‘A’ Rating – in accordance with the BRE Green Guide to Specification.

ADVICE + GUIDANCE

• Can be built to any retained height and is suitable for any application.

• The capping block is shaped asymmetrically (tapered), making capping straight or curved walls much easier.

Installation of the capping block will be easier and quicker as the shape of the capping piece minimises the need for cuts.

GRAVITY / ENGINEERED Gravity (max 1.2m) Engineered (above 1.2m)

LICENCE Anchor blocks are manufactured under licence from Anchor Wall Systems Inc.

For advice and guidance on ordering, installation, etc – see pages 64 for more information.

24 | 25

Segmental Retaining Walls Specification Guide

Anchor Diamond® retaining walls

DRY-BUILD RETAINING WALLS WITH A STRAIGHT SPLIT FACE

Anchor Diamond® Each Anchor Diamond® block features a patented rear lip that acts as a guide to ensure accurate alignment and precise set back every time without the need for mortar. Combined with its mortarless and pinless design, this provides clear advantages: installation in almost all weathers and reduced labour costs.

Anchor Diamond® 25 block can be built up to 0.9m high (Diamond® 30 up to 1.2m high) with no geogrid and up to 3m high with geogrid.

Please see page 45 for information on an Anchorplex™ Diamond® installation.

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Section 2

Retaining Walls

DiamondÂŽ

Introduction

Anchor DiamondÂŽ retaining walls 26 | 27

Segmental Retaining Walls Specification Guide

Anchor Diamond® retaining walls

Anchor Diamond® 1 Anchor Diamond® Basalt, Moneymore

6 Anchor Diamond® Basalt, Selby

2 Anchor Diamond® Canelletto, Enniskillen

7 Anchor Diamond® Basalt, Selby

3 Anchor Diamond® Cashel, Dungannon

8 Anchor Diamond® Basalt, Moneymore

4 Anchor Diamond® Basalt, Aughnacloy

9 Anchor Diamond® Canelletto, Belper

5 Anchor Diamond® Basalt, Larne

2

3

AG.UK.COM

1

4

Section 2

Retaining Walls

DiamondÂŽ

Projects

Anchor DiamondÂŽ retaining walls

5

8

6

9

28 | 29

7

Segmental Retaining Walls Specification Guide

Anchor Diamond® retaining walls

Anchor Diamond® Dry-build retaining walls with a straight split face

COLOURS

Frost Resistant

<.9m

BASALT

CASHEL

CANELLETTO

CORRIB

No Reinforcement Diamond 25

<1.2m No Reinforcement Diamond 30

AG.UK.COM

Section 2

Retaining Walls

Diamond速

Product Information

PROFILES

200 x 75mm

Anchor Diamond速 retaining walls

435 x 150mm

The stone face is naturally textured to give the wall the appearance of natural cut stone.

175

75

330

200 SHORT CUT CAP

150

218

435

CORNER BLOCK

250

150

150

300

435

435

DIAMOND速 30 BLOCK

DIAMOND速 25 BLOCK

30 | 31

Segmental Retaining Walls Specification Guide

Anchor Diamond® retaining walls

Anchor Diamond® Dry-build retaining walls with a straight split face

STOCK INFORMATION Product type

Frost Resistant

Length (mm)

Depth (mm)

Height (mm)

30 BLOCK

435

300

150

25 BLOCK

435

250

150

CORNER BLOCK

435

218

150

SHORTCUT CAP

200†

330

75

In Stock

Yes

m2 per pack

Available Colours Basalt / Cashel / Canelletto

MTO

Corrib

MTO

Basalt / Cashel / Canelletto / Corrib

Yes MTO Yes MTO

Basalt / Cashel / Canelletto

Units per pack

Unit weight (kg)

Weight per pack (t)

Packs per 8 wheeler

Packs per unit lorry

3.5

54

26

1.44

10

IRE 16 / GB 19

3.5

54

23

1.24

10

IRE 16 / GB 21

N/A

48

29.5

1.44

10

IRE 16 / GB 19

N/A

120

10.3

1.236

10

IRE 16 / GB 21

Corrib Basalt / Cashel / Canelletto Corrib

The Short Cut cap ‘short side’ 175mm in length.

MTO – Made to order (minimum quantity required) †

<.9m No Reinforcement Diamond 25

<1.2m No Reinforcement Diamond 30

INSTALLATION DATA Blocks

Set back / Face angle (degrees)

Minimum inside radius (to back of block on bottom course)

Minimum outside radius (to back of block on bottom course)

Tolerances on all dimensions (m)

30 BLOCK

10.6°

2.7m

0.9m

±2mm

24 N/mm2

Straight cut

stretcher

15.4

25 BLOCK

10.6°

2.4m

1.2m

±2mm

24 N/mm2

Straight cut

stretcher

15.4

CORNER BLOCK

N/A

N/A

N/A

±2mm

24 N/mm2

Straight cut

stretcher

N/A

SHORTCUT CAP

N/A

N/A

N/A

±2mm

N/A

Straight split

stretcher

5.4

Compressive strength*

Face finish

Face geometry

no. per m2 / lm

*Compressive strength determined by a 150mm cube from a block.

MANUFACTURING

CERTIFICATION

Anchor segmental retaining wall blocks are manufactured from locally sourced, high grade aggregates. Using the latest computerised mixing systems ensures colour and strength consistency. The weathered finish of the Diamond® range is due to the most modern computer-controlled manufacturing process. POM: Made at our Fivemiletown production plant.

ISO 14001 ISO 9001 OSHAS 18001 CE Marking

Environmental Management.

Quality Management.

Occupational Health and Safety Management.

Download our Declaration of Performance (DOP) data at: www.ag.uk.com/cemarking

AG.UK.COM

SPECIFICATION REFERENCE: NBS PLUS: 45-25-66/320 Precast concrete interlocking blocks D41 Crib walls, gabions and other gravity retaining walls – 310 DRYSTACK INTERLOCKING MASONRY

Section 2

Retaining Walls

Diamond®

Product Information

STANDARDS + PERFORMANCE

FEATURES + BENEFITS

Our segmental retaining wall products are regularly tested to record important physical characteristics and to comply with product specific performance criteria. The durability and performance of Anchor blocks is assured by meeting or exceeding targets for compression strength and water absorption.

• Built with no mortar or concrete, the unique dry-build locking system allows fast-track construction in all weathers – that means quicker installation rates than traditional brick and blockwork.

If you need further assistance in this respect please consult our Technical Specification Department.

Product Type Manufactured to Efflorescence

Dry-build retaining walls with a ‘naturally textured’ finish BS EN 771-3:2011+A1:2015 Specification for masonry units.

State-of-the-art factory controlled vapour curing significantly reduces this naturally occurring chemical reaction

SUSTAINABILITY Energy Use Water Used Recyclable Manufacturing

100% renewable 100% rain water harvesting 100% of this product can be recycled Produced in the UK using responsibly sourced materials

Recycled Aggregate Content: 65% Waste Wood + Plastic: 100% recycled Carbon Footprint We have a new state-of-the-art washing plant which enables AG to produce walling from 100% recycled waste aggregate. Please contact our Technical Specification Department if you are interested in specifying such a product BREEAM ‘A’ Rating – in accordance with the BRE Green Guide to Specification.

200 x 75mm

Anchor Diamond® retaining walls

435 x 150mm

• Features a patented rear lip that acts as a guide to ensure accurate alignment and precise set back every time without the need for mortar.

• Mortarless and pinless (fast-track construction).

• Diamond® 25 can be built to 0.9m high while Diamond® 30 can be built up to 1.2m high with no geogrid.

• The capping block is shaped asymmetrically (tapered), making capping straight or curved walls much easier.

• Installation of the capping block will be easier and quicker as the shape of the capping piece minimises the need for cuts.

GRAVITY / ENGINEERED Diamond 25 Gravity (max 0.9m provided the ground behind the wall is no greater than a 1:3 slope).

Engineered (above 0.9m).

Diamond 30 Gravity (max 1.2m provided the ground behind the wall is no greater than a 1:3 slope).

Engineered (above 1.2m).

LICENCE Anchor blocks are manufactured under licence from Anchor Wall Systems Inc.

ADVICE + GUIDANCE For advice and guidance on ordering, installation, etc. – see pages 64 for more information.

32 | 33

Segmental Retaining Walls Specification Guide

Anchor Bayfield® retaining walls

DRY-BUILD RETAINING WALLS WITH A DISTRESSED STONE FINISH

Anchor ® Bayfield With its rough hewn weathered texture, Anchor Bayfield® is an extremely versatile dry-build walling option.

Bayfield® is available in four attractive standard palettes, with a distressed stone face providing a weathered, textured appearance akin to natural dry stone walling. It can be used to create attractive retaining walling up to 0.9m high using blocks alone, can be combined with geogrid reinforcement to build engineered walls up to 3m, or terraced to create the build shown in the photo opposite.

To add to the speed and convenience of dry-build, Bayfield® features a patented rear lip that acts as a guide to ensure accurate alignment and precise set-back every time.

AG.UK.COM

Section 2

Retaining Walls

Bayfield®

Introduction

Anchor Bayfield® retaining walls 34 | 35

Segmental Retaining Walls Specification Guide

Anchor Bayfield® retaining walls

Anchor Bayfield® 1 Anchor Bayfield®, Enniskillen

6 Anchor Bayfield®, Private

2 Anchor Bayfield® Cashel, Private

7 Anchor Bayfield® Corrib, Fivemiletown

3 Anchor Bayfield® Basalt, Derry

8 Anchor Bayfield® Basalt, Hillsborough

4 Anchor Bayfield® Cashel, Fivemiletown

9 Anchor Bayfield® Canelletto, Omagh

5 Anchor Bayfield® Cashel, Omagh

2

3

AG.UK.COM

1

4

Section 2

Retaining Walls

Bayfield®

Projects

Anchor Bayfield® retaining walls

5

8

6

9

36 | 37

7

Segmental Retaining Walls Specification Guide

Anchor Bayfield® retaining walls

Anchor Bayfield®

Dry-build retaining walls with a distressed stone finish

COLOURS

BASALT

CASHEL

CANELLETTO

CORRIB

Frost Resistant

<.9m No Reinforcement

AG.UK.COM

Section 2

Retaining Walls

Bayfield®

Product Information

PROFILES

200 x 75mm

Anchor Bayfield® retaining walls

435 x 150mm

The stone face is distressed to give the wall a weathered textured appearance akin to natural dry stone walling.

175

75

330

200 SHORT CUT CAP

150

218

435

CORNER BLOCK

150

250

435

38 | 39

BLOCK

Segmental Retaining Walls Specification Guide

Anchor Bayfield® retaining walls

Anchor Bayfield® Dry-build retaining walls with a distressed face finish

STOCK INFORMATION Product type

Length (mm)

Depth (mm)

Height (mm)

BLOCK

435

250

150

CORNER BLOCK

435

218

150

Yes

SHORTCUT CAP

200†

330

75

Yes

†

In Stock

Yes MTO

Available Colours

m2 per pack

Basalt / Cashel / Canelletto

Unit weight (kg)

Units per pack

Weight Packs per per pack (t) 8 wheeler

Packs per unit lorry

3.5

54

24

1.3

10

IRE 16 / GB 21

N/A

48

29.5

1.44

10

IRE 16 / GB 19

N/A

120

10.3

1.236

10

IRE 16 / GB 21

Corrib Basalt / Cashel / Canelletto Corrib Basalt / Cashel / Canelletto Corrib

The Short Cut cap ‘short side’ 175mm in length.

INSTALLATION DATA Frost Resistant

<.9m

Blocks

Set back / Face angle (degrees)

Minimum inside radius (to back of block on bottom course)

Minimum outside radius (to back of block on bottom course)

Tolerances on all dimensions Compressive (m) strength*

BLOCK

10.6°

2.4m

1.2m

±2mm

24 N/mm2

Stone cut

stretcher

15.36

CORNER BLOCK

N/A

N/A

N/A

±2mm

24 N/mm2

Straight cut

stretcher

N/A

SHORTCUT CAP

N/A

N/A

N/A

±2mm

N/A

Straight split

stretcher

5.4

Face finish

Face geometry

no. per m2 / lm

No Reinforcement

AG.UK.COM

MANUFACTURING

CERTIFICATION

Anchor segmental retaining wall blocks are manufactured from locally sourced, high grade aggregates. Using the latest computerized mixing systems ensures colour and strength consistency. The weathered finish of the Diamond® range is due to the most modern computer-controlled manufacturing process. POM: Made at our Fivemiletown production plant.

ISO 14001 Environmental Management.

ISO 9001 Quality Management.

OSHAS 18001 Occupational Health and Safety Management.

CE Marking Download our Declaration of Performance (DOP) data at: www.ag.uk.com/cemarking

SPECIFICATION REFERENCE: NBS PLUS: 45-25-66/320 Precast concrete interlocking blocks D41 Crib walls, gabions and other gravity retaining walls – 310 DRYSTACK INTERLOCKING MASONRY

Section 2

Retaining Walls

Bayfield®

Product Information

STANDARDS + PERFORMANCE

FEATURES + BENEFITS

Our segmental retaining wall products are regularly tested to record important physical characteristics and to comply with product specific performance criteria. The durability and performance of Anchor blocks is assured by meeting or exceeding targets for compression strength and water absorption.

• Built with no mortar or concrete, the unique dry-build locking system allows fast-track construction in all weathers – meaning quicker installation rates than traditional brick and blockwork.

If you need further assistance in this respect please consult our Technical Specification Department.

Product Type Manufactured to Efflorescence

Dry-build retaining walls with a ‘distressed stone’ finish BS EN 771-3:2011+A1:2015 – Specification for masonry units.

State-of-the-art factory controlled vapour curing significantly reduces this naturally occurring chemical reaction

• Features a patented rear lip that acts as a guide to ensure accurate alignment and precise set back every time.

• Can easily be built up to 900mm high with no concrete, mortar or geogrid.

• The stone face is rough hewn to give the wall a weathered textured appearance akin to natural dry stone walling.

• The capping block is shaped asymmetrically (tapered), making capping straight or curved walls much easier.

• Installation of the capping block will be easier and quicker as the shape of the capping piece minimises the need for cuts.

SUSTAINABILITY Energy Use Water Used Recyclable Manufacturing

200 x 75mm

Anchor Bayfield® retaining walls

435 x 150mm

100% renewable 100% rain water harvesting 100% of this product can be recycled Produced in the UK from locally sourced materials

Recycled Aggregate Content: 65% Waste Wood + Plastic: 100% recycled Carbon Footprint We have a new state-of-the-art washing plant which enables AG to produce walling from 100% recycled waste aggregate. Please contact our Technical Specification Department if you are interested in specifying such a product BREEAM ‘A’ Rating – in accordance with the BRE Green Guide to Specification.

GRAVITY / ENGINEERED Gravity (max 0.9m provided the ground behind the wall is no greater than a 1:3 slope).

Engineered (above 0.9m).

LICENCE Anchor blocks are manufactured under licence from Anchor Wall Systems Inc.

ADVICE + GUIDANCE For advice and guidance on ordering, installation, etc – see pages 64 for more information.

40 | 41

Segmental Retaining Walls Specification Guide

Design Information + Advice AG.UK.COM

Section 3

Design Information + Advice

Design Information + Advice

Wall Types

44

Machine Install (Vertica)

46

Corner Details

50

Curve Details

53

Handrails + Barriers

56

Small Wall Inspiration

58

DESIGN INFORMATION +

ADVICE XX 42||XX 43

Segmental Retaining Walls Specification Guide

Design Information + Advice

AN INTRODUCTION TO WALL TYPES Gravity Walls

Engineered Walls

A gravity wall is a retaining wall that does not use soil reinforcement. It has height limitations specific to each product. A gravity wall relies on the weight and setback of the block to resist the soil forces being exerted on the wall.

These are segmental retaining walls taller than gravity walls that can be designed several ways. Geosynthetic reinforcement is often used – however, in conjunction with AG, two other options are available: Anchorplex™ and the Stabilisure system.

GRAVITY WALL SYSTEM

Agricultural grade boundary fence. An open boarded fence is recommended. NB. A closed boarded fence will add significant windloading to the wall.

Slope of the ground behind the wall not greater than 1:3

Caps to be fixed to top row with suitable construction adhesive

600mm x 150mm levelling pad using compacted Dot Type 1 sub base on sound soil base

Well graded cranular fill (Max 75mm partical size) compacted in max 150mm deep layers

1200

L 435mm x D 300mm x H 150mm Anchor® Diamond 30 blocks (Nom. 10.6 degrees face from vertical) 10.6º

300mm wide column of single sized drainage stone 300

SYSTEM

1.2m High Anchor® Diamond Gravity Retaining Wall Full installation guides for reinforced and gravity walls available on request.

100mm diameter, semi-perforated land drain piped to positive outlet

AG.UK.COM

Section 3

Design Information + Advice

Design Information + Advice

TYPES OF ENGINEERED WALL SYSTEMS

Topsoil

Low-permeable Soil

Filter Fabric

Reinforced Soil Zone

Geosynthetic Reinforcement

Drainage Aggregate

Levelling Pad Drainpipe

SYSTEM A

Geosynthetic-Reinforced Retaining Wall mass behind the facing units. The larger the stabilised soil mass, the more soil can be retained or held back. The geosynthetic reinforcement in the soil extends past the theoretical failure plane and serves to create a large rectangular mass of block and reinforced soil, restraining the retained soil.

44 | 45

A geosynthetic-reinforced wall needs to be designed by a qualified engineer. With reinforced retaining walls there are (theoretically) no height limitations, and they are used in taller applications. It requires more work area behind the structure. The block of soil is stabilised by introducing reinforcement layers into the soil

Segmental Retaining Walls Specification Guide

Design Information + Advice

SYSTEM B

Anchorplex™ The Anchorplex™ retaining wall system offers a unique solution to problematic wall construction sites. It is a retaining wall built with Anchor products and self-compacting structural backfill specified by a qualified professional, backed up with all of the calculations required to meet the needs of the most challenging sites.

Topsoil

Filter Fabric

Lowpermeable Soil

In combination with an Anchor block, the structural backfill attaches itself to the wall facing, effectively increasing the depth and increasing the mass of the facing. The structural backfill acts as the required drainage zone.

Using this system of structural backfill eliminates the need to construct a stabilised earth zone behind the wall facing. This method of construction also requires substantially less excavation than is necessary with grid-reinforced wall systems. Because of these efficiencies and the ease of design, Anchorplex™ walls have become extremely popular with contractors and designers worldwide.

Anchorplex Structural Backfill Levelling Pad

Drainpipe

Anchorplex™ Applications Reinforced Walls Up To 3 Metres Anchorplex™ construction is often a more costeffective solution than building with geogrid reinforcement in walls up to about 3 metres tall.

Limited Room to Excavate

The structural backfill that meets Anchor Wall Systems’ specifications allows water to drain behind the wall.

It is often possible to build an Anchorplex™ wall in situations where traditional geogrid reinforcement is not an option because of boundary lines, rock outcroppings or other obstructions that limit the amount of excavation that can be done.

Competing with Machine-Placed ‘Big Blocks’ For wall heights less than 3 metres, Anchorplex™ walls are almost always more economical than machine-placed ‘big block’ walls – and are always better-looking structures.

Further information available on request.

AG.UK.COM

Example of an Anchorplex™ wall system.

Section 3

Design Information + Advice

Stabilisure STABILISURE is a unique micro soil nailing system, which can be mobilised quickly and for installation in limited working space to provide stability improvements for the in-situ soils.

150mm wide drainage column: 10mm single size stone

Capping block to be fixed with suitable construction adhesive

Temporary cut slope: safe angle of repose to be determined by contractor.

L 457mm x D 280mm x H 200mm Anchor® Vertica blocks 4º

STABILISURE G100 soil nails embedment depth and horizontal centres are generally 1.4m.

Minimum 100mm diameter rigid uPVC drainage pipe to suitable approved outfall.

The pipe must be fully jettable and regularly maintained.

Compacted Class 6F2 fill leveling pad to be placed on competent original founding stratum. Any soft/loose or unsuitable aterial encountered to be replaced with compacted Class 6F2 fill. Foundation details to be confirmed at formal design stage.

Capping block to be fixed with suitable construction adhesive

0º Vertical Parapet / Crash Barrier Constructed using Anchor® Vertica Double Sided block

Design Information + Advice

Pins to be bent up into voids between the Vertica blocks and voids filled with C20 concrete

SYSTEM C

1200

L 457mm x D 280mm x H 200mm Anchor® Vertica Double Sided blocks (10mm pea gravel to be placed into block voids)

footway

road

Granular backfill (Class 6I) benched into insitu, compacted in layers (in accordance with MCDHW Specification for Highways Works)

46 | 47

300mm wide drainage column: 10mm single size stone

Segmental Retaining Walls Specification Guide

Design Information + Advice

ANCHOR VERTICA® MACHINE INSTALL

Machine install options provide speed + safety.

If you choose one of our new machine install options, walls go up faster than you could have ever believed possible – and because there’s no manual heavy lifting and less exposure to fall hazards, it makes the whole site far safer.

Features + Benefits: • Can improve the cost, speed and safety of installation.

• Two blocks can be lifted at once, drastically reducing installation time.

• Blocks can be fitted accurately and adjusted manually, reducing risk of injury on site.

If you have any questions please contact our Technical Specification Department.

Learn more online: professional.ag.uk.com/machineinstall

AG.UK.COM

Section 3

Design Information + Advice

Design Information + Advice

INSTALLING A GRAVITY WALL SYSTEM

Setting out the wall and excavation Diagram 1 • Mark out the wall placement. Verify the locations with the client and engineer if required or appropriate.

• Mark out the location of the excavation trench so that, when dug, the wall blocks will run centrally down the middle of the trench with equal spacing between the front and back of the blocks to the front and back of the trench.

• For engineered walls, make the excavation 600mm from front to back and 350mm deep, unless design assistance has specified this differently.

Diagram 1: Excavation Trench

• Firmly compact the soil in the base of the trench, using a vibrating plate compactor before installing the levelling pad.

Levelling Pad (Footing) Diagram 2 • An aggregate levelling pad is made of a good compactible base material – eg. MOT Type 1, 20 40mm aggregate with fines, crusher run or similar.

• The pad must be 150mm deep (after compaction) and must extend the full width of the excavation trench.

• Fully compact the aggregate, using a vibrating plate compactor, making sure it is level front-toback and side-to-side.

Diagram 2: Levelling Pad (Footing) Compaction

• If the ground levels along the wall length slope by more than 200mm, the levelling pad must be stepped up to match the slope of the ground.

Base Course Diagram 3 • The most important step in the construction process.

• Always randomly select and mix blocks from a minimum of three packs to help achieve a balanced colour blend.

• Begin laying blocks at the lowest elevation of the wall.

Diagram 3: Base Course 48 | 49

• The base course blocks must be fully bedded and lie completely flat on the levelling pad.

Segmental Retaining Walls Specification Guide

Design Information + Advice

INSTALLING A GRAVITY WALL SYSTEM • Lay the first block, levelling it front to back and side to side.

• Place the blocks side by side, flush against each other, making sure the blocks are in full contact with the levelling pad. Ensure blocks are level in both directions with a spirit level.

• Use a string line along the back of the blocks to align the wall units, or evenly align the back of the units (not the front) to form smooth and consistent curves.

• If the wall site is on an incline, do not slope the blocks – step them up so they remain consistently level.

Diagram 4: Core Fill

Construction of the next course Diagrams 4 + 5 • Always randomly choose and mix blocks from a minimum of three packs to help achieve a balanced colour blend.

• Clean any debris off the top of the blocks.

• Place the second course of blocks on top of the base course. Maintain a running bond by placing the units in a staggered relationship to the course beneath.

• Push the block forward towards the front of the wall to ensure the locator cam or rear lip is tightly located against the block below.

• Backfill with drainage aggregate directly behind the block, adding 200mm at a time.

Diagram 5: Construction of the next course

• The drainage aggregate should be 15 - 20mm clean or ‘no fines’ aggregate and should extend at least 300mm back from the rear of the wall.

• Fill all voids between each wall unit with drainage aggregate. Block cores must also be fully filled.

Drainage Design Diagrams 6 + 7

AG.UK.COM

• Each project is unique. The ground levels on the site will determine at what level to install the perforated drainage pipe, but generally the drainage pipe is positioned as low as possible behind the wall so water drains down, out and away from the wall into a storm drain, or to an area lower than the wall.

Diagram 6: Drainage Pipe

Section 3

Design Information + Advice

Design Information + Advice

INSTALLING A GRAVITY WALL SYSTEM • The perforated drainage pipe should be placed in the middle point of the 300mm drainage zone.

• You may need to place and backfill several courses to achieve the proper drainage level.

For best results, consider covering the perforated drainage pipe with a geotextile sock to act as a filter.

Site Cleaning + Restoration • Brush off the wall and clean up any debris from the construction process.

• Following these best practices for construction will ensure the successful construction of an Anchor Wall.

Compaction Diagram 8 • Shovel suitable compactible backfill material behind the drainage aggregate and compact the fill (not the drainage aggregate) with a handoperated compactor.

• Make sure the aggregate is level with or slightly below the top of the base course.

• Place soil in front of the base course and fully compact. The base course must be buried.

• Continue to fill and compact the backfill as each course is constructed.

• Self-propelled compaction equipment should not be used within 1.2 metres of the wall units.

Reinforcement For walls above 1000mm high • Geosynthetic reinforcement is generally required for walls taller than 1000mm.

Diagram 7: Drainage Aggregate

• For walls taller than 1000mm a suitably qualified engineer must be consulted for design assistance.

Contact AG for names and contact details of engineers in your area.

Finish Levels + Surface Drainage • Protect the wall with a finished ground level at the top and bottom.

• To ensure proper water drainage away from the wall, use a minimum of 200mm of soil with low permeability. This will minimise water seeping into the soil and drainage aggregate behind the wall.

Diagram 8: Compaction 50 | 51

Segmental Retaining Walls Specification Guide

Design Information + Advice

CORNER DETAILS Inside Corners Diagram 1: Base Course To create an inside 90° corner, begin by placing a block at the corner. Then lay a second block perpendicular to the first and continue laying out the rest of the base course working from the corner out.

Diagram 2: Next Course On the second course, place all blocks in a running bond along one side of the corner. Once the second course of one wall is established, begin the second course of the adjacent wall. Several blocks away from the corner, position full blocks in a running bond. Continue the running bond back towards the corner, until the gap becomes less than a full unit.

A split unit* will then be required to maintain running bond away from the corner. Measure the length of the unit required and split to fit.

Block placement in the corner must alternate in direction with each succeeding course. The locating cam of the block being overlaid within the corner should be removed manually using a hammer and chisel, and these units should be bonded in place using a concrete adhesive.

Extend base course beyond corner to prevent settling

Diagram 1: Base Course

Alternate blocks on each course

*Cutting or splitting blocks â&#x20AC;&#x201C; use a hydraulic or mechanical splitter, or split manually by using a hammer and chisel to score the block on all sides. A circular masonry saw may also be used.

AG.UK.COM

Diagram 2: Next Course

Section 3

Design Information + Advice

Design Information + Advice

CORNER DETAILS

Inside Corners â&#x20AC;&#x201C; Reinforcement Diagrams 1 + 2: First Course Reinforcement To install reinforcement on an inside 90° corner, begin by checking the wall plan to determine reinforcement lengths and elevations. Cut reinforcement to the lengths shown in the wall plan, paying attention to the reinforcement strength direction.

Next, determine the proper placement of the reinforcement by dividing the proposed height of the wall by four. This represents the distance that reinforcement must extend beyond the front of the adjoining wall. Measure this distance from the front of the adjoining wall and begin the grid placement here.

Example: If overall wall height is 1.2m, the reinforcement extension would be 300mm.

Make sure the grid is placed 25mm back from the face of the block below and runs along the back of the adjoining wall.

Place the next section of reinforcement on the adjoining wall. The reinforcement must not overlap and should lie flush with previously placed sections.

Once reinforcement is in place, the next course of blocks can be installed.

Diagrams 3 + 4: Second Course with Geogrid The first section of grid on this course is placed using the same formula that determines placement in front of the adjoining wall. Alternate the reinforcement extension to the previous reinforced course on each course where reinforcement is required.

Place the next section of reinforcement on the adjoining wall. The reinforcement must not overlap and should lie flush with previously placed sections.

Once reinforcement is in place, the next course of block can be installed.

H Wa e l + igh l 4 t

l al t W igh e H +4 ct

re n

ire

gt

D

h

h

D

gt

ire

ct

n re

io

St

n

Ex G te r i d ns io n

n rid io G ns te

Ex

n

St

io

Grid 25mm back from front of face

Diagram 1: Reinforcement Base

n io ct ire D h gt

io ct ire D h gt re n

re n St

n

n

io

io

ct

ct

ire

ire

D

D St

h

h

gt

gt

n re

n re

Diagram 4: Second Course with Geogrid

52 | 53

Diagram 2: Next Reinforcement Section

St

St

n

H Wa e l + igh l 4 t

l al t W igh e H +4

Butt joint grid sections with no overlap

Diagram 3: Second Course with Geogrid

Segmental Retaining Walls Specification Guide

Design Information + Advice

CORNER DETAILS

Outside Corners

Outside Corners – Reinforcement

Diagram 1: Base Course

Diagram 4: First Course with Reinforcement

To build an outside 90° corner, begin by placing a corner base course working from the corner block outwards.

Begin by checking the wall plans from the engineer to determine reinforcement lengths and elevations. At each reinforced course, lay a section of reinforcement near the corner wall, ensuring that it is placed 25mm back from the wall face in one direction, whilst running along the back, but not overlapping the adjacent wall. Ensuring no grid overlap occurs, continue the grid reinforcement along both legs of the wall, to the reinforcement lengths specified. At this stage, there will still be several blocks which are not in contact with any reinforcement. Grid must not be directly overlaid, so this reinforcement must be incorporated at the next block level up. Lay the next course of blocks and, before backfilling, mark the portion of the wall without reinforcement. This is important, because once the backfill is in place this cannot be seen.

Diagrams 2 + 3: Second course Lay a corner block perpendicular to the one below and fix the block in place with concrete adhesive.

Two or three blocks away from the corner lay full blocks, maintaining running bond with the course below. Lay blocks back towards the corner block, leaving space for the final split units required to complete the course.

Use split units immediately adjacent to the corner block to complete the course. Continue to alternate the corner unit orientation with each course and always use a concrete adhesive on all corner blocks and split units. Use split units* as necessary to maintain running bond. *Cutting or splitting blocks – use a hydraulic or mechanical splitter, or split manually by using a hammer and chisel to score the block on all sides. A circular masonry saw may also be used.

Diagram 5: First Course with Reinforcement Back fill and compact behind the course of blocks.

Cut an additional length of grid to correspond to the marked section of blocks. This grid should be cut to the length shown in the drawings and laid so that it is placed 25mm back from the wall face, whilst running along the back, but not overlapping the adjacent wall. Repeat this procedure at each reinforced layer within the wall, alternating the alignment of the additional layer of reinforcement at each elevation.

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Corner Block

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Grid 25mm back from front of face Split Unit

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No overlap of grid onto blocks

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Diagrams 1, 2 + 3: Outside Corners

Diagrams 4 + 5: Reinforcement

Grid 25mm back from front of face

Section 3

Design Information + Advice

Design Information + Advice

CURVE DETAILS

Inside Curves

Inside Curves – Reinforcement

Minimum Radius

Retaining walls are designed assuming 100% coverage of the reinforcement.

When building an inside curve, the minimum radius allowed (when measured to the front face of the block) for an Anchor Vertica® wall is 2.08m.

Check the wall plan to ensure the radius of the base courses of any inside curves are greater than 2.08m.

When building a curve the reinforcement will have gaps. To ensure 100% coverage, additional lengths of reinforcement are used to fill those gaps on the next course of blocks. Never overlap the grid on one course to avoid slippage.

Diagram 1: Base Course

Diagram 3: First Course with Reinforcement

Begin by driving a stake into the ground at the desired centre of the curve. Attach a string and rotate it in a circle around the stake to mark the radius in the levelling pad (footing or base). Align each block face with the radius curve and ensure level placement from side to side and front to back.

Cut reinforcement to the lengths specified in the wall plan. Lay segments of reinforcement within 25mm of the face of the wall, making sure that the strength direction of each section is perpendicular to the wall face. Place the next course of blocks, marking the backs of blocks to identify the middle of un-reinforced areas. Backfill and compact.

Diagram 2: Additional Course On each course, the back of the locating cam of each block must be in contact with the units below to ensure structural stability. The setback of the block will cause the radius of each course to gradually increase and eventually affect the running bond of the wall. To maintain proper running bond, use split units* as needed. Once a split unit is cut to size, bond in place with a concrete adhesive.

Diagram 4: Next Course On the next course, centre subsequent sections of the reinforcement on the marked blocks to ensure full reinforcement coverage. This step is important because when this course is backfilled, it is impossible to locate the unreinforced areas. Repeat this procedure throughout the construction of the radius curve when reinforcement is required.

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Use marked blocks to place extra reinforcement

Diagrams 3 + 4: Reinforcement

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Diagrams 1 + 2: Inside Curves

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Minimum radius for the bottom course is 2.08 meres

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split manually by using a hammer and chisel to score the block on all sides. A circular masonry saw may also be used.

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*Cutting or splitting blocks – use a hydraulic or mechanical splitter, or

Segmental Retaining Walls Specification Guide

Design Information + Advice

CURVE DETAILS

Outside Curves Minimum Radius The radius of the top course of an Anchor wall will always be less than the radius of the base course because of the batter of the wall.

For Anchor walls built with outside curves the minimum radius of the top course of blocks must not be less than 1.82m.

The table below shows the minimum allowed radius of the base course for various wall heights. For each wall height, provided that the actual base course radius is greater than the minimum shown, the radius of the top course will always be greater than the allowed minimum of 1.82m.

Diagrams 2 + 3: Additional Courses On each course, the back of the locating cam of each block must be in contact with the units below to ensure structural stability. The setback of the block will cause the radius of each course to gradually decrease and eventually affect the running bond of the wall. To maintain proper running bond, use split units* as needed. Once a split unit is cut to size, bond in place with a concrete adhesive. *Cutting or splitting blocks – use a hydraulic or mechanical splitter, or split manually by using a hammer and chisel to score the block on all sides. A circular masonry saw may also be used.

Stake Wall Height (m)

Minimum Allowed Radius of Base Course (m) to Back of Block Mark radius

2.40

2.12

2.20

2.10

2.00

2.07

1.80

2.05

1.60

2.02

1.40

2.00

1.20

1.97

1.00

1.95

0.80

1.92

0.60

1.90

0.40

1.87

0.20

1.85

Example: A 1.60m wall is being built with an outside curve. The radius of the base course is 2.15m. The minimum allowed radius of a base course for a 1.60m high wall is 2.02m, so the curve can ‘just’ be built successfully.

Diagram 1: Base Course

Diagram 2: Additional Course

Minimum radius for the top course is 1.82 metres

Diagram 1: Base Course

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Drive a stake into the ground at the desired centre of the curve. Attach a string and rotate it in a circle around the stake to mark the radius in the levelling pad (footing or base). Align the back of the block (not the front) with the radius curve and ensure level placement from side to side and front to back.

String

Diagram 3: Additional Courses

Section 3

Design Information + Advice

Design Information + Advice

CURVE DETAILS

Outside Curves â&#x20AC;&#x201C; Reinforcement

Grid should cover as much area as possible without overlapping

Diagram 1: Reinforcement Retaining walls are designed assuming 100% coverage of the reinforcement. When building a curve the reinforcement will have gaps. To ensure 100% coverage, additional lengths of reinforcement are used to fill those gaps on the next course of blocks. Do not overlap the grid on one course to avoid slippage.

Diagram 2: First Course with Reinforcement

Diagram 1: Reinforcement

Mark back of blocks to show gaps in reinforcement

Cut reinforcement to the lengths specified in the wall plan. Lay sections of the reinforcement within 25mm of the face of the wall with the strength direction perpendicular to the wall face. Avoid overlapping the reinforcement by separating each section.

Diagram 3: Next Course Place the next course of blocks, marking the backs of blocks to identify unreinforced areas. This step is important because when this course is backfilled, it is impossible to locate the un-reinforced areas. Use the marked blocks as a guide, placing subsequent sections of reinforcement to overlap the gaps left on the previous course. This will ensure total reinforcement coverage.

Repeat this procedure throughout the construction of the radius curve whenever reinforcement is required.

Diagram 2: First Course with Reinforcement

On the next course, cover any open areas with additional reinforcement

Diagram 3: Next Course

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Segmental Retaining Walls Specification Guide

Design Information + Advice Incorporating handrails and barriers into your design

HANDRAILS + BARRIERS AG have been producing Anchor walling blocks since 1999. Over the years we have worked successfully with our customers on a large number of schemes that have used a wide variety of handrails, fences and barriers with our retaining wall systems.

For a design specification on corners and fence detailing on any Anchor walling system, please contact us directly.

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Section 3

Design Information + Advice

Design Information + Advice

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1 Anchor Vertica® Canelletto, Derry/L’Derry 2 Anchor Vertica® Basalt, Craigavon 3 Anchor Vertica®, Belfast 4 Anchor Vertica®, Sheffield 5 Anchor Vertica® Basalt, Armagh 6 Anchor Vertica® Basalt, Craigavon

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Segmental Retaining Walls Specification Guide

Design Information + Advice

SMALL WALL DESIGN INSPIRATION

The versatility of Anchor systems means that they’re not just for 200m long, 15m high retaining walls. They can be used in much smaller areas to easily create attractive landscaping features such as raised planters, flower beds, decking areas, ponds and water features, steps, tree rings and rockeries.

With the crisp finish and overall visual appeal that Anchor blocks provide, these features can add true value to any project.

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1 Anchor Diamond® Canelletto, Larne

6 Anchor Bayfield® Basalt, Fivemiletown

2 Anchor Diamond® Basalt, Larne

7 Anchor Bayfield® Canelletto, Dublin

3 Anchor Diamond® Basalt, Larne

8 Anchor Bayfield® Basalt, Dublin

4 Anchor Bayfield® Cashel, Belfast

9 Anchor Bayfield® Canelletto, Toome

5 Anchor Bayfield® Basalt, Fivemiletown

10 Anchor Bayfield®, USA

Section 3

Design Information + Advice

Design Information + Advice

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Segmental Retaining Walls Specification Guide

Technical Information

TECHNICAL INFORMATION

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Section 4

Technical Information

Technical Information

Advice + Guidance

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The Environment

66

Design + Specification Services 68

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Segmental Retaining Walls Specification Guide

Technical Information

ADVICE + GUIDANCE Product Inspection All products should be carefully inspected for defects or damage upon delivery and prior to being installed. Delivery documentation is required to be signed and should include a record of such defects, which will need to be notified to an AG Sales representative within five working days of delivery.

AG are BS EN ISO 9001:2014 registered and use an integrated quality management system.

Colour Blending All products are manufactured from natural materials. Although we strive to provide consistency of colour, slight colour variations are inevitable with all concrete product manufacturing processes.

When purchasing products, AG recommend that packs are selected from the same date of production (DOP). Products should then be mixed on site from a minimum of three packs to help reduce the effect of banding.

Products which have been installed for a period will weather naturally, so the colour of any new products, when compared, will inevitably vary.

Efflorescence Efflorescence is a white crystalline deposit that can occur naturally on the surface of all concrete materials. AG use market leading technologies to significantly reduce the frequency and occurrence of efflorescence but these cannot totally prevent the phenomenon in all instances.

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Where it does occur, efflorescence may mask the colour of the product for a period of time but this tends to gradually weather off naturally with rainfall given time. AG will not replace products affected by efflorescence.

AG recommend that customers ensure that packs of products which have had their packaging removed should be recovered to prevent secondary efflorescence.

Waste AG recommend that customers can expect that up to 5% of delivered product may be damaged due to loading, unloading, transport and site handling. Any product damaged should be set aside and reused for cutting or detailing and AG will not be held liable for such waste.

Where the customer experiences waste of greater than 5% of the total quantity ordered, an AG Sales Representative should be informed without delay.

AG recommend that customers ensure that their contractor accurately measures the area on site before ordering products. Dimensions taken from a product plan can vary significantly from the final layout. When ordering, customers should allow for an additional 5% to cater for detailing, cutting and acceptable waste.

Installation AG recommend that all products should be installed in accordance with the latest and relevant British or European Standard.

Health + Safety Care must be taken when handling / working with individual products to avoid risk of injury from manual handling, sharp edges, abrasive texture and dust fragments. Inhalation of any dust produced from aggregates must be avoided. Protective clothing must be worn and is activity dependent.

Further information may be obtained by contacting AG or the HSE/HSA. Visit our website for Health + Safety information for our Anchor segmental retaining walls.

Section 4

Technical Information

Technical Information

Capping Blocks Adhesive is required for fixing caps and partial units.

For advice on Capping Blocks please contact AG. NB: The recommended adhesive for fixing caps and partial units is Montagefix, which is available from AG.

MAINTENANCE General Dirt / Staining Clean using a stiff brush, mild detergent and hot water rinsing with a low pressure hose.

Ordering

Remedial Work

Minimum order quantities are required for certain colours and sizes. Before placing an order, please speak to one of our sales team members – they will be happy to advise on this and any other product questions you may have.

As with any type of remedial work, this should be tested on a small area which is not easily seen (in accordance with the manufacturers instructions), so that it can be assessed before carrying out work on a large area.

AG operate a no returns policy.

This does not affect your statutory rights.

Remedial cleaning procedures may affect the final appearance of the masonry. For your safety, make sure you use appropriate PPE.

Questions + Complaints If you have any queries or complaints, please contact our Sales office on +44 (0) 121 747 0202 in UK and on +44 (0)28 8778 8112 in Ireland.

All information contained in this brochure is correct at the time of going to print. We recommend that you contact our sales staff for further information at the design stage of your project for the most up-to-date information. AG reserves the right to discontinue products if necessary. The colours shown in this literature are as accurate as the printing process will allow. Whilst every effort is made to match colours and represent textures, we recommend that colours and textures are chosen from actual samples of the products.

Power Washing Using a power hose is not recommended as it may damage the surface of the product and encourages algae vegetation growth.

Graffiti It’s best to take preventative measures if graffiti is likely to occur. Anti-graffiti systems are available.

These consist of a protective sacrificial coating on the masonry which acts as a barrier against the adhesion of the graffiti.

Lichen, Moss + Algae This should be treated with an appropriate proprietary weed killer applied with a low pressure sprayer, used in accordance with the manufacturer’s instructions.

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Segmental Retaining Walls Specification Guide

Technical Information

HEALTH, SAFETY + THE ENVIRONMENT

AG recognise that the activities of the organisation could potentially have a significant impact on the environment.

AG was awarded certification because of the high standards of safety awareness across all of its operations.

In order to minimise this impact, we take a proactive rather than reactive stance on environmental issues.

In recognition of these efforts, we have won a number of environmental awards.

Design professionals can trust that AG will always apply best practice in terms of health and safety.

‘Green’ Facts for AG • AG have an internal environmental management system.

• Concrete paving and flags are rated ‘A’ under the Green Guide.

• Xflo can be used as part of a SUDS system.

• 75% of the water used to grind TerraPave® is recycled.

• Our Toome plant uses environmentally friendly mixes which use re-cycled water in the mixing process.

Certification

Good Practice Commitments • Water management and recycling.

• Recycling ancillary production waste and use of recycled waste aggregates.

• Dust suppression in operation for plant movement, production processes including crushing and screening.

• Developing markets for by-products.

• Adoption of noise suppression and reduction techniques.

• Implementation of waste management systems in place across all locations.

BS EN ISO 14001 is a comprehensive tool that provides all industry with a way of controlling environmental impacts. AG were awarded certification for a multi-site management system (across six NI manufacturing sites and three quarries) that documents environmental impacts including: energy waste, production waste and carbon emissions.

• Energy conservation projects.

OHSAS 18001 CERTIFICATION

• A HSEQ Manager is dedicated to improving the environment at all our facilities.

OHSAS 18001:2007 is an international occupational health and safety management system that provides a framework to control health and safety risks and improve the health and safety of employees.

Corporate Social Responsibility

• Site restoration and aftercare.

• Landscaping and improved visual amenity.

• Environmental audits take place monthly at all locations. This encompasses all aspects of the environment, ensuring that the company is adhering to our in house procedures and legislative requirements.

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A comprehensive social responsibility policy illustrates AG’s commitment to operating to the highest standards in every aspect of its business. We aim to run our business ethically, co-ordinating environmental

Section 4

Technical Information

Technical Information

stewardship with industry best practice, striving to manage activities in a safe manner, protecting the health and safety of everyone involved and encouraging social inclusion in the communities in which we operate.

Sustainability AG is one of the most innovative and progressive concrete manufacturing companies in the UK and Ireland and has invested significantly in modern ‘green’ technology.

Our commitment to positive environmental, social and economic performance is visible through the continuous assessment of our products and their environmental impact.

Restoration Waste material that cannot be recycled back into the production process is used as an aid to restoration at our sites. It helps to re-landscape and restore parts of our sites no longer used for production purposes. We have joined together with several partners to develop micro habitats to enhance the flora and fauna on our sites:• All-Ireland Pollinator Plan 2015-2020: in conjunction with the National Biodiversity Programme.

• RSPB NI : Work on protecting bank faces for Sand Martins • Ballinderry River Management Scheme: Protecting White-Crayfish • Northern Ireland Raptor Study Group: Protecting the Peregrine Falcon at Fivemiletown

Environmental AG have designated ‘Care of the Environment’ as an essential part of the business strategy. We would seek to support the government’s environmental aims by adopting, where possible, Best Available Techniques Not Entailing Excessive Cost (BATNEEC).

We will take into account environmental issues when designing management systems, organisational structures and communication systems.

Control of the Working Environment Any industrial process can lead to pollution of the surrounding environment and atmosphere. In the quarrying and concrete product manufacturing industry, our processes involve blasting raw aggregate, crushing, screening, washing and finally the various production processes to create our extensive product ranges. Dust is the main environmental hazard within our plants.

In recognition of this the company has developed an environmental policy, which outlines the company’s commitment to the environment.

• A dedicated environmental operative on each of our 12 manufacturing sites, responsible for dust control, monitoring silt discharge and ensuring company meets requirements of IPC (Industrial Pollution Control) licence requirements.

• Staff training to ensure that the workforce understands the environmental impact of both the individual and company activities, and environmental policy commitments.

• Actively promote the communication of issues concerning the environment to staff, suppliers and customers.

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Printed: April 2019 BayfieldÂŽ Basalt, Dublin

SPECIFICATION GUIDE

Great Britain 4 Marlin Office Village 1250 Chester Road Castle Vale Birmingham B35 7AZ T +44 (0) 121 747 0202 Ireland 64 Old Moy Road Dungannon BT71 6PU T 028 8778 8112â&#x20AC;&#x201A; E specifications@ag.uk.com

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