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AB Three (3° Setback)
BBA Agrément Certificate
Certificate type
Dry stack retaining wall system (3° setback).
Suitable for:
- All types of road and rail infrastructure projects that require approval by the Highways Agency (the product holds a BBA Roads and Bridges certificate).
- Large commercial and residential walls.
- Low gravity (unreinforced) walls.
Depending on site conditions, walls can be constructed up to 1.1 m in height, using the blocks and granular fill only. Taller walls will require reinforcement, most often through the use of Geogrid, No-Fines Concrete or building a double-width gravity wall.
CE-marked and manufactured in accordance with BS EN 771-3, ISO 9001 and ISO 14001.
Allan Block is a hollow-core, dry-stacking concrete block for the construction of retaining walls. Designed with a 3° raised front lip which automatically establishes the setback from vertical.
Manufactured from a mixture of aggregates (65% recycled secondary aggregate content) and cement.
Features and benefits:
- Cost-effective and versatile.
- Offers high performance, quality, and lasting value.
- Expected lifespan of 120 years (if designed and built in accordance with its British Board of Agrément (BBA), Roads and Bridges certificate).
- Includes a hollow-core design which makes blocks easy to handle, promotes drainage and becomes solid when filled with stone.
- Anti-climb.
- No need for pins, clips or mortar.
- Can be constructed regardless of weather conditions.
- Built-in drainage.
- Durable and maintenance-free.
- Freeze-thaw resistance.
- High strength, durable block.
- Efflorescence-free.
Applications:
Suitable for:
- All types of road and rail infrastructure projects that require approval by the Highways Agency (the product holds a BBA Roads and Bridges certificate).
- Large commercial and residential walls.
- Low gravity (unreinforced) walls.
Depending on site conditions, walls can be constructed up to 1.1 m in height, using the blocks and granular fill only. Taller walls will require reinforcement, most often through the use of Geogrid, No-Fines Concrete or building a double-width gravity wall.
CE-marked and manufactured in accordance with BS EN 771-3, ISO 9001 and ISO 14001.
| Finish | Split-face texture |
| Uniclass 2015 | |
| CAWS | D41/310 Drystack interlocking masonry F10/18 Concrete facing blockwork F10/255 Concrete facing blockwork |
| Product Reference | AB Three (3° Setback) |
| Colour | Abbey blendCinder blendLimestone blendPewter blendSlate blendYorkstone blend |
| Accessories/ Other requirements | Not requiredAB Corner Block200 x 400 x 200 mm (h x w x d), 26 kg (available left- or right-handed; insert requirements). AB Wall Caps100 x 450 x 300 mm (h x w x d), 27 kg (to be fixed with a high-grade, waterproof, flexible masonry adhesive). GeogridFor use when the block weight and setback do not provide enough structural support. For taller walls. Consult manufacturer for information. No-Fines Concrete BackfillWill allow taller walls to be constructed with less excavation. For taller walls. Consult manufacturer for information. |
| Standard product features | Size (h x w x d): 200 x 450 x 300 mm. Finish: Split-face texture. Weight: 35 kg. Technical characteristics:
|
| Product Options | Accessories/ Other requirements: - Geogrid: Typical Geogrid reinforced walls will require an excavation depth of 70% or more of the wall height to accommodate geogrid tails. - No-Fines Concrete: Will require an excavation depth of around 40% of the wall height. |
- 09/R147 : Certificate: Roads and Bridges Accredited
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