Reinforcement Estimates

Typical average weight of reinforcement (kg/m3) in concrete building elements. The below figures are for guideline only and may vary for different projects.
Concrete building element
Weight of reinforcement in kg/m3
Bases
Beams (lightly loaded)
Beams
Capping beams
Columns (lightly loaded)
​Columns
Ground beams
Footings
Pile Caps
Plate slabs
Rafts
Retaining walls
Ribbed floor slabs
Slabs – one way
Slabs – two way
Stairs
Tie beams
Transfer slabs
Walls – normal
Walls – wind
90-130
100-150
150-300
135
​110-200
200-450
230-330
70-100
110-150
95-135
115
110-150
80-120
75-125
67-135
130-170
130-170
150
70-100
90-150

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

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

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