Main Bar B1:MainBar
Length of B1 = clear span + 2 x width of walls – 2 x bar cover + 2 x bend length
=4000+2*230-2*32+2*9*16=4684mm
or
Length of B1 =clear span +development length -bend(90 deg)
=4000+2*50d-2*2d=5536 mm
Anchor bar T1:Anchor Bar
Length of T1=clear span + 2 x width of walls – 2 x bar cover + 2 x bend length
=4000+2*230-2*32+2*9*12=4612mm
or
Length of T1 =clear span +development length -bend(90 deg)
=4000+2*50d-2*2d=4000+2*50*12-2*2*12=5152mm
For More Details: Civil engineering
Cranked bars:
Cranked BarLength B2= clear span +18d+0.42D,
where D= Depth of beam – 2*(top & bottom cover)-crank bar
=4000+18*12+0.42*(450-2*25-12)
= 4379mm
Stirrups:
a=450-25*2=400mm
b=300-2*25=250mm
Length of S1=2*(a+b)+24d
=2*(400+250)+24*8
=1492mm
or
Length of S1 = 2*(a+b)+hook-bend, where hook = 10d, bend for 90 deg=2d, for 135deg=3d. There are three 90 deg bend and two 135 deg bend.
=2*(400+250)+(10*8*2)-(3*8*2)-(2*8*3)=1364mm
No. of stirrup= Length/ Spacing +1=4000/180+1=24
Bar bending schedule for RCC beam:BBS of Beam
Ref: IS:2502
