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# Civil Engineering/volume - formula for trapezoidal footing

Bhushan wrote at 2011-03-20 18:37:16
Right formula is = V = [L X B X d] + h / 3 [ A1 + A2 + ROUTE UNDER A1 A2 ] where , l = length , b = breadth , d = bottom depth , h = D - d , A1 = bottom area , A2= top area (ii) is = V = [L X B X d] + h/6(A1 + A2 + 4 Am) where , h = D - d , A1 = bottom area , A2= top area, Am = Mean of Top and Bottom Area

amar wrote at 2011-07-21 09:36:30
Right formula is = V = [L X B X d] + h / 3 [ A1 + A2 + ROUTE UNDER A1 A2 ] where , l = length , b = breadth , d = bottom depth , h = D - d , A1 = bottom area , A2= top area (ii) is = V = [L X B X d] + h/6(A1 + A2 + 4 Am) where , h = D - d , A1 = bottom area , A2= top area, Am = Mean of Top and Bottom Area

kamal wrote at 2011-08-31 08:56:25
Right formula is = V = [L X B X d] + h / 3 [ A1 + A2 + ROUTE UNDER A1 A2 ] where , l = length , b = breadth , d = bottom depth , h = D - d , A1 = bottom area , A2= top area (ii) is = V = [L X B X d] + h/6(A1 + A2 + 4 Am) where , h = D - d , A1 = bottom area , A2= top area, Am = Mean of Top and Bottom Area

Anand Jadhav wrote at 2012-04-19 09:01:01
Well for to calculate the volume of trapezoidal footing.

V= L*B*d + h/3(A1+A2+Sq.rt of A1A2)

h=D-d, A1=Bottom Area, A2=Top Area of footing,

d=Bottom Depth, D=Total Depth.

Murli meena kartik wrote at 2013-02-02 03:09:48
Volum formula is:-

v= (l*b*d)+h/3(A1+A2+ROUTH UNDER A1A2)where are,

l= length

d=bottom depth

A2=top area

Sunil wrote at 2014-11-22 12:42:48
kamal wrote at 2011-08-31 08:56:25

Right formula is = V = [L X B X d] + h / 3 [ A1 +

A2 + ROUTE UNDER A1 A2 ] where , l = length , b

= breadth , d = bottom depth , h = D - d , A1 =

bottom area , A2= top area (ii) is = V = [L X B X d]

+ h/6(A1 + A2 + 4 Am) where , h = D - d , A1 =

bottom area , A2= top area, Am = Mean of Top and

Bottom Area

Sunil wrote at 2014-11-22 12:42:59
kamal wrote at 2011-08-31 08:56:25

Right formula is = V = [L X B X d] + h / 3 [ A1 +

A2 + ROUTE UNDER A1 A2 ] where , l = length , b

= breadth , d = bottom depth , h = D - d , A1 =

bottom area , A2= top area (ii) is = V = [L X B X d]

+ h/6(A1 + A2 + 4 Am) where , h = D - d , A1 =

bottom area , A2= top area, Am = Mean of Top and

Bottom Area

Er Nitin wrote at 2015-06-29 11:16:34
I dont know why guys add V= LxBxH..... becoz this is a rectangle formula and by this addition yout trapezoidal footing volume just double and wrong actually just formula is Trapezoidal footing Volume(V)= h/3(A1+A2+underroot of A1xA2) where h is perpendicular depth and A1 & A2 are top & bottom Areas of Footing.

Er. Udas Man wrote at 2015-08-19 06:50:41
The right answer is : Trapezoidal footing Volume(V)= h/3(A1+A2+sqrt(A1xA2)) where h is height of footing and A1 & A2 are top & bottom Areas of Footing.

Prash wrote at 2016-05-14 05:30:39
You all wrote correct answer but what if the footing is not symmetrical, one side is greater than the other

Sivaganesh M wrote at 2016-07-11 02:40:42
V= h/3((AB^2 - ab^2)/(B-b))

&

V= h/3 ((A^2*B - a^2*b)/(A-a))

dhatrajsinh wrote at 2017-03-20 04:20:44
V=1/2*(a+b)*h*l

Where a=base width, b=top vidth, h=height,l=length..

dhatrajsinh wrote at 2017-03-20 04:20:51
V=1/2*(a+b)*h*l

Where a=base width, b=top vidth, h=height,l=length..

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