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

feel free to call me
Raju
Engineer-Civil
9999213613
DLF

Please divide the footing in to 2 parts i,e 1) Bottom
rectangular portion & 2)top slope portion
Total volume (V) = v1+v2
Volume of bottom / rectangular portion is called as Volume
(v1)

Volume of top / slope portion is called as Volume (v2)

V1 = L1xB1xh1

V2= h2/3* (a1+a2)* square root of (a1+a2)

L1= length of bottom portion
B1= breadth of bottom portion
h1 = height of bottom portion
L2 = length of top portion
B2= breadth of top portion
h2 = height of top portion
a1= area of bottom bottom Portion = L1*B1
a2 = area of top rectangle portion= L2 *b2

For any clarification
Please call
S.Prabhu
9901702081

in trapezoidal footing we seperate the footing as two
parts.one is rectangle another is trapezoidal

for taking rectangular portion= (L*B*d)
L=length of footing
B=breath of footing
d=footing depth (at the end of rectangle portion height)

for taking trapezoidal
v=h/3((A1+A2)+sqrt(A1A2))
V=volume
A1= footing area (L*B)
A2= column area+ add 50mm for each side ((l+100)+(b+100))
h=height difference(D-d)
finally,
Add =rectangle+trapezoidal
= (L*B*d)+h/3((A1+A2)+sqrt(A1A2))

a g+2 building having mezenine floor ,but stair is
approching only 1st and 2nd floor, in this case stair is
calculate in plinth area for mezenin floor or not?