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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

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

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

Read more: http://wiki.answers.com/Q/Trapezoidal_footing_volume_formula#ixzz1Waw9cNx3

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.

Hope this satisfies your query.

Volum formula is:-

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

l= length

b=beadth

d=bottom depth

A2=top 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

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

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.

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.

You all wrote correct answer but what if the footing is not symmetrical, one side is greater than the other

V= h/3((AB^2 - ab^2)/(B-b))

&

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

V=1/2*(a+b)*h*l

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

V=1/2*(a+b)*h*l

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

Civil Engineering

Answers by Expert:

I can answer any questions to do with civil and structural engineering consultancy and construction industry in East Africa and the Middle East, and specifically with the analysis and design of reinforced concrete structures. My particular expertise is in the aseismic design and optimisation of tall buildings.

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.Fellow of Institution of Structural Engineers (UK)
.Fellow of Institution of Civil Engineers(UK)
.Member of the Institution of Engineers, Kenya
.Registered Engineer, ERB, Kenya
.Member of the Architectural Association of Kenya (Engineers Chapter)
.Chartered Engineer (UK)**Publications**

•1984: International Conference on the Art and Practice of Structural Design, London
•1994: 3rd Int. Kerensky Conference in Structural Engineering, Singapore
•2008: International Conference on High-Rise Towers, Abu Dhabi
•2013: IEK International Conference, Kisumu, Kenya
**Education/Credentials**

BSc, 1st Class Hons, in Building Engineering, University of Bath, UK
MSc in Concrete Structures and Technology, University of London.
Diploma of Imperial College, UK.**Awards and Honors**

•Science Congress Special Award (for 2-seater Hovercraft - 1968)
•Institution of Civil Engineers Award for outstanding performance at Bath University (1975)
•Concrete Society Postgraduate study Bursary Award (1976)
•Consular Representative for British High Commission, Nairobi. (1995 to 1998)
•Examiner for Institution of Civil Engineers Professional Interviews, Nairobi. (1997 to 1998)
•Branch Representative in Vienna for PI assessment for Inst. of Struct. Engrs. (1999 to 2010)