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