Can anybody tell me how to calculate the quantity of a
trapezoidal footing?With its formula and an example.
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Answer Posted / krishna kumar.a
Quantity = 1/6*(top area+bottom area+ 4* mean area)
Example
top length =3m, width =2m
bottom length =5m , width =4m
height =1m
Top area =3*2 = 6 sqm
Bottom area = 5*4 = 20 sqm
Mean area =(5+3)/2*(4+2)/2 = 12 sqm
Quantity = 1/6*(6 + 20 +4*12)= 12.33 cum
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