Clear cover of Beam, Slab, Column, lintel & foundation and unit weight of materials

Clear cover:

  • Slab – 15mm
  • Beam – 25mm
  • Column – 40mm
  • Foundation – 40 to 60mm
  • Lintel – 20mm

Allowable wastage for steel works is 3 %( i.e. cutting/bending wastage).

For reconciliation purpose, + or -2% allowable for rolling margin in this accounts.

Above 25mm dia of rods 5% wastage should be considered.

Unit Weight:

  1. Water     -1000 Kg/cum
  2. Cement -1440 Kg/cum
  3. Steel       -7850 Kg/cum
  4. Wood     -1200 Kg/cum
  5. Sand      -1610 Kg/cum
  6. P.C.C      -2400 Kg/cum

 

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