Example 6 1 Rectangular Water Tank Design – Free download as PDF File .pdf), Text File .txt) or read online for free. leakage. This project gives in brief, the theory behind the design of liquid retaining structure (Elevated circular water tank with domed roof and conical base). and further guidance on seismic design methods for storage tanks larger tanks, and as such the seismic design for these larger storage tanks.

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Consequently, only part of the triangular hydrostatic load will be carried by ring tension and part of the load at bottom will r.c.c.overead supported by cantilever action. The design of bottom slab depends on the system of columns and beams provided.

These four equations can be solved for four constant. Circular tanks hinged at base and free at top.

Concrete mix used is M At the center of short span B. The walls of these tanks are subjected to pressure and the base is subjected to weight of water and pressure of soil.

Load in the top portion tankk taken by the hoop tension caused in the top portion. The effect of direct compressive force is not considered as it is very small and compressive reinforcement is provided.

This will automatically take desigh of failure due to cracking. Cylindrical tank with top slab and fixed base At top deflection will be zero and slope will be as for the slope of top slab. At the top shear force and bending moment will be zero.


Overhead RCC Water Tanks Construction

Protection measure shall be provided to the underside of the roof to prevent it from corrosion due to condensation. An estimate should r.c.c.overhead made of the proportion of the pressure resisted by bending moments in the vertical and horizontal planes. Pressure of submerged earth and water at depth of 4.

Thus four equations can be ddsign which can be solved for four constants. For calculation purposes the cover is also taken into concrete area.

Design of Braces Maximum B. M will be zero.

Where it is desired to allow the walls to expand or contract separately from the floor, or to prevent moments at the base of the wall owing r.c.c.overheav fixity to the floor, sliding joints may be employed. Efficient compaction preferably by vibration is essential. Every third bar will be stopped at 1 m.

Overhead Tanks These tanks may be rectangular or circular.

Circular Tanks Fixed at Base and Free at top. The walls are subjected to water pressure. At the base deflection and B.

water tank design example | Ravindra Ranatunga Ranatunga –

Area of steel required at support 14, In strength calculations the permissible stress shall be as follows: In strength calculations the permissible concrete stresses shall be in accordance with Table 1. Permissible Stresses in Steel a For resistance to cracking. A reinforced concrete member of liquid retaining structures is designed on the usual principles ignoring tensile resistance of concrete in bending.


Effective depth required For small capacities rectangular tanks are generally used and for bigger capacities circular tanks are used. In addition to bending, walls are subjected to direct tension caused by the hydrostatic pressure on the walls.

In concrete sections of thickness mm or greater, two layers of reinforcement steel shall be placed one near each face of the section to make up the minimum reinforcement. Half the bars from support are bent to the mid-span giving 16 mm.

The base slab is subjected to bending moment at the end to direct tension, caused by the water pressure acting on vertical walls.

In case of tanks intended for the storage of water for domestic purpose, the roof must be made water-tight. Maximum hoop tension occurs at 0. Runway Construction in Mumbai. No upward load is produced in column when tank empty. The staging has to carry load of water and tank. In case the width of the tank wall is greater than twice the height of atnk it will be designed spanning vertically, simply supported at top and fixed at the base.

Direct load r.c.c.overhrad very small, its effect is neglected. There are three types of movement joints.