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:
- Water -1000 Kg/cum
- Cement -1440 Kg/cum
- Steel -7850 Kg/cum
- Wood -1200 Kg/cum
- Sand -1610 Kg/cum
- P.C.C -2400 Kg/cum
Unit weight of RCC -25000N/M