BBS OF SLAB (TWO WAY)
SECTION – A-A
No. of bar = (Length/Spacing) +
1
= (6000/100) + 1
= 61 nos.
Cranked bar = 31 nos.
Straight bar = 30 nos.
CRANKED BAR
Cutting length = L + Crank + Ld
– Bend
= 5000 + (0.42 x 138 x 2) + (50
x 12 x 2) – (4 x 1 x 12) – (2 x 2 x 12)
= 6220 mm
= 6.22 meter
For 32 nos.
= 6.22 x 32
= 192.82 meter
STRAIGHT BAR
Cutting length = L + Ld
= 5000 + (2 x 50d)
= 5000 + (2 x 50 x 12)
= 6200 mm
= 6.2 meter
For 30 nos.
= 6.2 x 30
= 186 meter
TOP BAR (EXTRA)
No. of bar = [(LI/5)/100]
+ 1] x 2………..(for 2 sides)
= [(6000/5)/100] + 1] x 2
= 26 nos.
Cutting length = L – (2 x L/5)
+ (2 x 100)
= 5000 – (2 x 5000/5) + 200
= 2800 mm
= 2.8 meter
For 26 nos.
= 2.8 x 26
= 72.8 meter
SECTION – B-B
No. of bar = (Length/Spacing) +
1
= (5000/100) + 1
= 51 nos.
Cranked bar = 26 nos.
Straight bar = 25 nos.
CRANKED BAR
Cutting length = L + Crank + Ld
– Bend
= 6000 + (0.42D x 2) + (50d x
2) – (4 x 1d) – (2 x 2d)
= 6000 + (0.42 x 138 x 2) + (50
x 12 x 2) – (4 x 1 x 12) – (2 x 2 x 12)
= 6000 + 115.92 + 1200 – 48 –
48
= 7219.92 mm
= 7,219 meter
For 26 nos.
= 7.219 x 26
= 187.71 nos.
STRAIGHT BAR
Cutting length = L + Ld
= 6000 + (50d) x 2
= 6000 + (50 x 12) x 2
= 7200 mm
= 7.2 meter
For 25 nos.
= 7.2 x 25
= 180 meter
TOP EXTRA BAR
No. of bar = [(L/5 + 1) / 100]
x 2
= [(5000/5 + 1) / 100] x 2
= 21 + 1
= 22 nos.
Cutting length = LI –
(2 x LI/5) + (2 x 100)
= 6000 – (2 x 6000/5) + 200
= 3400 mm
= 3.4 meter
For 22 nos.
= 3.4 x 22
= 74.8 meter
Explanation of Slab :
