MAXIMUM AND MINIMUM PERCENTAGE OF REINFORCEMENT REQUIRED FOR BEAM SLAB FOOTING COLUMN PEDESTAL AS PER IS456:2000

1. inayatabbasm
alla
Fe500for0.17%bd
INAYAT MALLA
9/20/20
PERCENTAGE OF REINFORCEMENT AS PER IS456:2000
TYPE OF
STRUCTURE
MINIMUM
REINFORCEMENTS
REQUIRED
MAXIMUM (AREA % of bD)
REINFORCEMENT
PERMISSIBLE
SLAB
0.15%bD for Fe250
0.12 %bD for Fe415
# max. dia of bar (φmax) = D/8
4%
BEAM
0.35%bd forFe250
LONGITUDINAL0.2% bd for Fe415
0.1% of web area SIDE FACE
(cl.26.5.1.5) SHEAR
4%
(for tension& compression both)
COLUMN
0.8%bD
# min. dia of bar (φmin) = 12mm
6% without lapping
4% with lapping(actually used)
PEDESTAL 0.15%
NOTE - Pedestal is a compression member, the effective
length of which does not exceed three times the least lateral
dimension.
FOOTINGS
0.15%bD For Fe250
0.12%bD For Fe415
pt%=Ast/bd*100 =(0.85/fy*100)
(nominal minimum reinforcement is as per slab)