1st Class Brickwork:

  • Cement mortar shall be prepared by mixing sand and cement in specified proportion. Sand shall be measured on the basis of its dry volume. In case of damp sand, its quantity shall be increased suitably to allow for bulkage.
  • Brick shall be laid in English bond. The brick shall be laid by layering method. A layer of mortar shall be spread on full width for suitable length of the lower courses. Each brick shall first be laid so as to project over the one below.
  • Both at the end and at the side, then pressed into the mortar and shoved into final position so as to embed the brick and to fill its inside face fully with mortar. Cut bricks shall not be used except where necessary.
  • The walls shall be taken up true to plumb with plumb bob. The thickness of brick courses shall be kept uniform and for this purpose, wooden straight edge with graduations giving thickness of each brick course including joint shall be used.
  • All courses shall be laid truly horizontal and all vertical joints shall be truly vertical. Vertical joints in alternate course shall come directly one over the other. A set of tools comprising wooden straight edge, mason’s spirit level, square, half metre rule, line and pins, string and plumb shall be kept for every 3 masons for frequent checking during progress of work.
  • Faces of walls found not in plumb shall be dismantled.Both the faces of walls of thickness greater than 25 cm. shall be kept in proper plane. All the connected brickwork shall be carried out nearly at one level and no portion of the work shall be left more than 1 metre below the rest of the work.
  • Where this is not possible, the work shall he racked according to bond (and not left toothed) at an angle not steeper than 45°Bricks shall be so laid that all joints are quite full of mortar. The thickness of joints shall not exceed10 mm. Bricks shall be laid with frogs upward except in the top course where frog shall be placed downward.
  • The face joints shall be racked to a minimum depth of 15 mm. by racking tools daily during the progress of work when the mortar is still green, so as to provide key for plaster or pointing to be done. Where plastering or pointing is not required to be done, the joints shall he struck flush and finished at the time of laying.
  • The face of brickwork shall be cleaned the very day that brickwork is laid daily and all mortar droppings removed. Green work shall be protected from rain by suitable covering. The brickwork shall be kept wet for a period of at least 7 days. The top of masonry work shall be left flooded at the close of the day.
  • Scaffolding shall be sound and strong and holes left in masonry work for supporting the scaffolding shall be filled and made good, before plastering.