Reinforcement Estimates - Prova Surveying Ltd

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Reinforcement Estimates

Concrete building element	Weight of reinforcement in kg/m3
Bases	90-130
Beams	250-350
Capping beams	135
Columns	200-450
Ground beams	230-330
Footings	70-100
Pile Caps	110-150
Plate slabs	95-135
Rafts	115
Retaining walls	110-150
Ribbed floor slabs	80-120
Slabs – one way	75-125
Slabs – two way	67-135
Stairs	130-170
Tie beams	130-170
Transfer slabs	150
Walls – normal	70-100
Walls – wind	90-150

NOTE: For exposed elements add the following: Beams +100%; Columns +15%; Walls +50%

Average values for typical concrete frames:
Heavy industrial = 130 kg/m3	130
Commercial = 100 kg/m3	100
Institutional = 90 kg/m3	90