header ads

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

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.



ALSO WATCH THE VIDEO:

Post a Comment

0 Comments