PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

Half or cut bricks shall not be used except where necessary to complete the bond.
Overlap in stretcher bond is usually half brick and is obtained by commencing each
alternate course with a half brick. The overlap in header bond which is usually half
the width of the brick is obtained by introducing a three quarter brick in each
alternate course at quoins. In general, the cross joints in any course of brickwork
shall not be nearer than a quarter of brick length from those in the course below or
above it.
6.8 Uniformity.
The brickwork shall be built in uniform layers; corners and other advanced work
shall be raked back. No part of a wall during its construction shall be raised more
than one metre above the general construction level, to avoid unequal settlement.
Parts of walls left at different levels shall be properly raked back. Toothing may be
done where future extension is contemplated but shall not be used as an alternative
to taking back.
For half brick partition to be keyed into main walls, indents shall be left in the main
walls.
6.9. Thickness of joints.
The thickness of joints shall be 10mm + 3 or – 3mm, unless otherwise specified.
Thickness of joints shall be kept uniform. Slight difference to thickness of bricks
shall be adjusted within joint thickness. Where brickwork is to match the existing
work, the joints shall be of the same thickness as in the existing work.
6.10 Striking joints.
Where no pointing, plastering or other finish is indicted, the green mortar shall be
neatly struck flush. Where pointing, plastering or other finish is indicated, the joints
shall be squarely raked out to a depth not less than 10mm for plastering and 15mm
for pointing.
GTS : General Technical Specification. Page 47