Steel Quantity

Enter the member and SiteMate works out how many bars, at what cut length, diameter-wise weight, 12 m bars to order and the cost.

Slab length (long span)Slab width (short span)Clear coverMain bar diaMain bar spacing c/cDistribution bar diaDistribution spacing c/cLayers (1 = bottom only, 2 = both faces)nos

Mark

Quantitynos

Cutting wastage%Steel rate (optional)₹/kg

Steel required (with 3% wastage)

kg = 0 tonnes

Net weight from the schedule: 0 kg
Wastage allowance: 0 kg
Total cut length: 0 m

How every number is arrived at

• Unit weight = d² ÷ 162.2 kg per metre, from (π/4)d² × 7850 kg/m³.
• Number of bars = clear distance ÷ spacing + 1 (one bar sits at each end).
• Cut length of a straight bar = clear length − cover both ends + 9d bend at each end.
• Stirrup / tie cut length = 2 × (width + depth inside cover) + 24d for the two hooks.
• Column verticals carry one lap of 50d per storey.
• Weight of a bar set = nos × cut length × unit weight.

Codes & references

IS 456:2000 — Plain and Reinforced Concrete, Code of Practice
IS 1786:2008 — High strength deformed steel bars
IS 2502:1963 — Bending and fixing of bars for concrete reinforcement
SP 34:1987 — Handbook on Concrete Reinforcement and Detailing

History

Estimates for guidance only. The bar bending schedule on the structural drawing governs.