Hello Everyone. Today in this Blog, we will try to understand HOW TO PREPARE BAR BENDING SCHEDULE OF RETAINING WALL

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**QUESTION: Prepare Bar Bending Schedule of 42' long and 20.5' high retaining wall. The length of the stem is 10', Main bars are #8@9"c/c distance and distribution bars are #6@7" c/c distance. The Main bars of stem on back-fill side are #8@7"c/c and on opposite side of back-fill are #6@5" c/c distance. Distribution bars of stem are #4@7"c/c distance.**

#### Solution:

Length of Retaining Wall = L = 42’ = 504”

__MAIN BAR OF RAFT:__
Members = 1

Clear Cover = c.c = 4”

c/c distance = 9”

Bending length = L

_{1}= 12”
Actual Length of Main bar of raft =l = 120”

Cut length of main bar of raft =

L’ = (l + L

_{1}) - c.c

L’ = (120” + 12”) - 4”

L’ = 128”

Number of bars = (Length of retaining wall / c/c distance)

Number of Bars = (504/9) x 2= 114

Total length = L = Cut length x Number of bars x members

= L = (128 x 114 x 1)/ 12 = 1216’

Diameter of Main bar = #8

Weight of #8 bar = 2.67 lbs./ft.

Total Weight = Total length x Weight of #8 bar

Total weight = 1216 X 2.67 = 3247 lbs.

__MAIN BAR OF STEM ON BACK-FILL SIDE:__
Members = 1

Clear Cover = c.c = 4”

c/c distance = 7”

Bending length = L

_{1}= 12”
Actual Length of Main bar of raft =l = 247”

Cut length of main bar of raft = L’ = (l + L

_{1}) - c.c
= L’ = (247” +12”) -4”

= L’ = 255”

Number of bars = (Length of retaining wall / c/c distance) + 1

Number of Bars = (504/7) + 1= 73

Total length = L = Cut length x Number of bars x members

= L = (255 x 73 x 1) /12= 1551’

Diameter of Main bar = #8

Weight of #8 bar = 2.67 lbs./ft.

Total Weight = Total length x Weight of #8 bar

Total weight = 1551 x 2.67 = 4141 lbs.

__MAIN BAR OF STEM OPPOSITE TO BACK-FILL SIDE:__
Members = 1

Clear Cover = c.c = 4”

c/c distance = 5”

Bending length = L

_{1}= 12”
Actual Length of Main bar of raft =l = 247”

Cut length of main bar of raft = L’ = (l + L

_{1}) - c.c
= L’ = (247” + 12”) -4”

= L’ = 255”

Number of bars = (Length of retaining wall / c/c distance) + 1

Number of Bars = (504/5) + 1= 102

Total length = L = Cut length x Number of bars x members

= L = (255 x 102 x 1) /12= 2168’

Diameter of Main bar = #6

Weight of #8 bar = 1.042 lbs./ft.

Total Weight = Total length x Weight of #8 bar

Total weight = 12168 x 1.042 = 2261 lbs.

__DISTRIBUTION BAR FOR RAFT:__
Members = 1

Clear Cover = c.c = 4”

c/c distance = 7”

Actual Length of Main bar of raft =l = 504”

Cut length of main bar of raft = L’ = l - c.c

= L’ = 504” -4”

= L’ = 500”

Number of bars = (Width of raft / c/c distance) + 1

Number of Bars = (116”/6) X 2= 40

Total length = L = Cut length x Number of bars x members

= L = (500 x 20 x 1) /12= 1667’

Diameter of Main bar = #4

Weight of #8 bar = 0.668 lbs./ft.

Total Weight = Total length x Weight of #8 bar

Total weight = 1667 x 0.668 = 1113 lbs.

__DISTRIBUTION BAR FOR STEM:__
Members = 1

Clear Cover = c.c = 4”

c/c distance = 7”

Actual Length of Main bar of raft =l = 504”

Cut length of main bar of raft = L’ = l - c.c

= L’ = 504” -4”

= L’ = 500”

Number of bars = (Height of stem / c/c distance) + 1

Number of Bars = (228”/8) + 1 x 2= 59

Total length = L = Cut length x Number of bars x members

= L = (500 x 59 x 1) /12= 2458’

Diameter of Main bar = #4

Weight of #8 bar = 0.668 lbs./ft.

Total Weight = Total length x Weight of #8 bar

Total weight = 2458 x 0.668 =1642 lbs.

I hope this will help you to understand HOW TO PREPARE BAR BENDING SCHEDULE OF RETAINING WALL and also check out the below video for brief understanding.

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