TRAPEZOIDAL FOOTING FORMULA

Volume, V = (L x B x D) = H/3{A1 + A2 + sq.rt (A1+A2)}

Where A1 = L x B

A2 = l x b

H = D-d (Overall depth of footing – depth of Rectangular footing)

THEORETICAL WEIGHT

Cement = 1440 Kg/Cubic Meter

Steel = 7850 Kg/Cubic Meter

Bricks = 1600 – 1920 Kg/Cubic Meter

1 Horse Power = 745.7 watts

Formula : (d)2/162

6mm = (6 X 6)/162 = 0.222

8mm = (8 X 8)/162 = 0.395

10mm = (10 X 10)/162 = 0.617

12mm = (12 X 12)/162 = 0.889

16mm = (16 X 16)/162 = 1.580

20mm = (20 X 20)/162 = 2.469

25mm = (25 X 25)/162 = 3.858

32mm = (32 X 32)/162 = 6.321

40mm = (40 X 40)/162 = 9.877

M-10 : 210 Kilogram = 4.20 Bags

M-20 : 320 Kilogram = 6.40 Bags

M-25 : 340 Kilogram = 6.80 Bags

M-30 : 380 Kilogram = 7.60 Bags

M-35 : 410 Kilogram = 8.20 Bags

M-40 : 430 Kilogram = 8.60 Bags

M-45 : 450 Kilogram = 9.00 Bags

M-50 : 450 + M.S 7.5%