H B

Q=DISCHRAGE IN CUMECMANNING'S COEFF FOR CONCRETE N=0.014V=VELOCITY IN M/SA=AREA OF CROSS SECTION OF DRAINP=PERIMETER OF DRAIN=2D+BR=A/PS=LONGITUDINAL SLOPE, GENERALLY 1IN 500 TO 1IN 750

Drain

dia Area(sq.cm)Spacing Perimeter No wt/m L

10 0.7854 200 c/s 3.5 6 21 0.61654 12.9473

8 0.50265 200 L 1 19 19 0.39458 7.4971

8 0.50265 200 L 1 19 19 0.39458 7.4971

Q=A 1NR23 S

12

10 0.7854 250 c/s 3.5 5 17.5 0.61654 10.7894

38.7309 kgs

Cover Slab Total Weight= 3600 X 38.73= 139.431 MT

dia Area(sq.cm)

8 0.50265 200 c/s 1 6 6 0.39458 2.3675

8 0.50265 200 L 1 6 6 0.39458 2.3675

8 0.50265 200 c/s 1 6 6 0.39458 2.3675

8 0.50265 200 L 1 6 6 0.39458 2.3675

9.47002

Total Weight= 3600 X 9.47= 34.0921 MT

Total quantity of steel=Dtrain+Cover Slab= 173.523 MT