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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Overhead RCC Water Tanks Construction

Area of steel required for — ve B. Minimum Cover to Reinforcement. Plain concrete member of reinforced concrete liquid retaining structures may be designed against structural failure by allowing tension in plain concrete as per the permissible limits for tension in bending. Positive sign indicates tension in the outside H2 Coefficient at Point Dt 0.

In case the width of tank wall is less than half the height of tank, it is designed spanning horizontally and fixed at the junctions.

Unless alternative effective means are taken to avoid cracks by allowing for the additional stresses that may be induced by temperature or shrinkage changes or by unequal settlement, movement joints should be provided at the following spacings: Let ‘t’ off thickness of wall.

Bending moments in the walls are found by moment distribution.

The walls are designed for these moments. The tanks are supported on staging which consists of masonry tower or a number of columns braced together. It is a movement joint with deliberate discontinuity without initial gap between the concrete on either side of the joint.


Shear taken by two bars of 32 mm. Design of Roof Slab. Hoop reinforcement will be provided on both faces. Wster a sliding layer is placed at g.c.c.overhead foundation of a wall, the length of the wall that can be kept free of cracks depends on the capacity of wall section to resist the friction induced at the plane of sliding.

The side walls will serve as girders. The tanks resting on ground like clear water reservoirs, settling tanks, aeration tanks etc. One application of these joints is between successive lifts in a reservoir wall. The direct horizontal tension caused by the direct pull due to water pressure on the end walls, should be added to that resulting from horizontal bending moments.

Elevated tanks are supported on staging which may consist of masonry walls, R. Enter the email address you signed up with and we’ll email you a reset link. Direct tension in long walls. Load from bottom slab will be triangular as shown in Figm 17m23 a. Hence values of Pc and Pr can be found. M at various heights and shear at base. As the ratio of length to breadth of slab is greater than 2, off will span in shorter direction.

The wall and floor joints should be in line except where sliding joints occur at the base of the wall in which correspondence is not so important.

H2 Coefficient at Point Dt 0.

water tank design example | Ravindra Ranatunga Ranatunga –

Steel required for – ve B. The risk of cracking due to temperature and shrinkage effects may be minimised by limiting the changes in moisture content and temperature to which the structure as a whole is subjected. Rise of 1 m.


This type of joint is provided for convenience in construction. Minimum Reinforcement a The minimum reinforcement in walls, floors and desigh in each of two directions at right angles shall have an area of 0. The bracings are designed for B. I In water retaining structures a dense impermeable concrete is required therefore, proportion of fine and course aggregates to cement should be such as to give high quality concrete.

While designing walls of watrr tanks the following points should be borne in mind: In members less than mm. Design of Long Walls. Though assumed that base is flexible, but in reality there will always be some restraint at the base and some pressure will be resisted by cantilever action of the wall.

Direct tension on long walls is given by.

Call Send a quick message. Walls i Provision of Joints a Sliding joints at the base of the wall. Maximum – ve B.

Joints are classified as given below. A gap is sometimes left temporarily between the concrete of adjoining parts of a structure which Fig. The tank walls are designed in the same way as the walls of tanks resting on the ground. Concrete mix used is M Thickness of 10 cm.