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Last edited 20 Dec 2020
|Two types of pistol brick. On the left, laid as a 'soldier' with a deep rebate and downstand that may be used to conceal a concrete toe; on the right, laid as a 'stretcher' which may be used to conceal a supporting steel angle.|
When brickwork is used as a cladding – whether to clad concrete- or steel-framed buildings, or low-rise cavity-wall construction, the bricks must be supported and tied back to the structure. This is often achieved with the use of steel angles, lintels, concrete toes or edge beams. Onto these are placed specially-made ‘pistol’ bricks (or rebated bricks) that conceal the method of support and the mortar bed.
A pistol brick gets its name from its pistol shape.
Pistol bricks can either be laid as stretchers (horizontally) or ‘brick-on-edge (vertically, as ‘soldiers’). The depth of rebate will depend on how the brick is arranged and the supporting construction. For example, when supported on a concrete toe that is 50mm deep, the rebate that will be cut into a soldier brick will be 50mm + 10mm (mortar joint) = 60mm deep. If a standard brick length is 215mm, this will leave a brick ‘body of 155mm. Between every third or fourth brick, there must usually be some form of metal tie restraint to tie the bricks back to the structure.
Because pistol bricks are special bricks and involve a change from normal brick dimensions, they involve first, special manufacture (and so higher costs) and second, a longer lead-in period until they can be delivered to the site. These factors must be weighed-up by the designer against the importance placed on the finished effect.
When considering whether to opt for pistols or any other type of brick, specifiers should consult with the brick manufacturer to ensure that what they propose can be feasibly manufactured in the timeframe required and for the available budget, and that it embodies no obvious in-use failure points.
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