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Minimum and maximum reinforcement

Minimum and maximum steel in beams, columns and slabs. Reference: IS 456:2000 Cl. 26.5.1, 26.5.2, 26.5.3.

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# Beam
b := 300 mm
D := 600 mm
d := 550 mm
f_y := 500 MPa
A_beam.min := 0.85*b*d/(f_y/(1 MPa)) = mm^2
A_beam.max := 0.04*b*D = mm^2

# Column
A_g := 400 mm*400 mm
A_col.min := 0.008*A_g = mm^2
A_col.max := 0.04*A_g = mm^2

# Slab (per metre width)
D_s := 150 mm
A_slab.min := 0.0012*1000 mm*D_s = mm^2

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