(RC designer Manual – The Concrete Association of India)


Capacity in 1000 Litres
Inside diameter in meter
Depth of water in ‘m’
Thickness of wall in cm.
Reinforcement

Wall
Floor
Horizontal steel at bottom, half depth
Vertical steel
Bars each way
Bar dia. mm.
Spacing cm.
Bar dia. mm.
Spacing cm.
Bar dia. mm
Spacing cm.
2
1.5x1.5
1.00
10.0
6
15
6
15
6
20
3
1.8x1.8
1.25
10.0
6
15
6
15
6
20
5
2.0x2.0
1.40
10.0
6
15
6
15
6
20
7
2.3x2.3
1.50
11.5
10
22
10
22
6
20
9
2.5x2.5
1.60
11.5
10
20
10
20
6
20
14
2.8x2.8
2.00
13.0
10
16
10
16
6
20
23
3.5x3.5
2.10
15.0
10
16
10
16
6
14
34
4.0x4.0
2.30
16.0
10
15
12
15
6
12
45
4.2x4.2
2.70
18.0
12
20
12
20
6
10
90
6.00
3.25
18
12
12
12
12
1
10