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excel sheet for design of rectangular rcc water tank
#1

Reinforced Concrete Water tank design is based on IS 3370: 2009 (Parts I IV). The design depends on the location of tanks, i.e. overhead, on ground or underground water tanks. The tanks can be made in different shapes usually circular and rectangular shapes are mostly used. The tanks can be made of RCC or even of steel. The overhead tanks are usually elevated from the roof top through column. In the other hand the underground tanks are rested on the foundation.

TYPES OF WATER TANK

Basing on the location of the tank in a building s tanks can be classified into three categories. Those are:

Underground tanks
Tank resting on grounds
Overhead tanks
In most cases the underground and on ground tanks are circular or rectangular is shape but the shape of the overhead tanks are influenced by the aesthetical view of the surroundings and as well as the design of the construction.

Steel tanks are also used specially in railway yards. Basing on the shape the tanks can be circular, rectangular, square, polygonal, spherical and conical. A special type of tank named Intze tank is used for storing large amount of water for an area.

The overhead tanks are supported by the column which acts as stages. This column can be braced for increasing strength and as well as to improve the aesthetic views.

BASIS OF CONCRETE WATER TANK DESIGN

One of the vital considerations for design of tanks is that the structure has adequate resistance to cracking and has adequate strength. For achieving these following assumptions are made:

Concrete is capable of resisting limited tensile stresses the full section of concrete including cover and reinforcement is taken into account in this assumption.
To guard against structural failure in strength calculation the tensile strength of concrete is ignored.
Reduced values of permissible stresses in steel are adopted in steel are adopted in design.
CIRCULAR WATER TANK

The simplest form of water tank is circular tank. For the same amount of storage the circular tank requires lesser amount of material. More over for its circular shape it has no corner and can be made water tight easily. It is very economical for smaller storage of water up to 20000000 liters and with diameter in the range of 5 to 8 m. The depth of the storage is between 3 to 4 m. The side walls are designed for hoop tension and bending moments.

PERMISSIBLE STRESSES IN CONCRETE

To ensure impervious concrete mixture linear than M 20 grade is not normally recommended to make the walls leak proof the concretes near the water face need to such that no crack occurs.
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#2
design of over head rectangular R.C.C water tank of 460 cubicmetre capacity .the tank should be placed 20 meter above ground on columns .bearing pressure of soil is 1.0 ton / metre sq. on which it is to be errected. seismic zone is 4.
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#3
Please can you send Various types of water tank design sheets.
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#4
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