. CUTTING BRICKS AND BLOCKS

Depending on their finished size, cut bricks are referred to as ‘bats’ or closers’. In the same way that the dimensions of full bricks have been designed so that they coordinate together, with an in-built allowance for a 10mm mortar joint, standard bats and closers such as quarters, halves and three-quarters are cut to specific dimensions that also make an allowance for a 10mm mortar joint. For example, two Queen Closers at 46mm each, plus 10mm for a joint, will be equal to half a brick – well, almost, since a half-brick is actually 102.5mm (the same as the header face of a brick), but it would take an unachievable level of accuracy to cut a brick by hand to a tolerance of 0.25mm. For the same reason, cutting a half to 102mm is considered acceptable, with the resultant ‘missing’ 0.5mm easily being accommodated in the adjacent cross-joint.

. CUTTING BRICKS AND BLOCKS

Fig. 145 Half bat, three-quarter bat, Queen Closer and full brick.

. CUTTING BRICKS AND BLOCKS

Fig. 146 Co-ordinating sizes of bats and closers with an allowance of 10mm for mortar joints.