# HOW TO PREPARE BAR BENDING SCHEDULE OF RETAINING WALL

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

### 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 = L1 = 12”
Actual Length of Main bar of raft =l = 120”

Cut length of main bar of raft =
L’ = (l + L1) - 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 = L1 = 12”
Actual Length of Main bar of raft =l = 247”
Cut length of main bar of raft = L’ = (l + L1) - 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 = L1 = 12”
Actual Length of Main bar of raft =l = 247”
Cut length of main bar of raft = L’ = (l + L1) - 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.

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