DESIGN (PRACTICAL RULES ) REQUIRED FOR THE CONSTRUCTION OF WATER TANKS

WATER RESERVOIRS:-- The most economic proportions for a covered circular tank are when the diameter equals the height,and that for an open circular tank when the diameter is made twice the height,and the most economic shape for a closed prismatic rectangular tank is that of a cube ,and for an open topped tank when the base is square and the height is half the length of one side . Ordinary 1:2:4 cement concrete mix don't make an impermeable construction, therefore a richer mix not less than 1:1.5:3 is prescribed for water reservoirs except in the case of thick sections and parts of structure neither in contact with water on any face nor enclosing the space above the water,or for mass work where a 1:2:4 mix may be used . Porous stones or brick aggregate should not be used for parts of structure either in contact with water on any face or enclosing the space above the water. It is essential to have practical Rules and use of the controlled concrete with minimum amount of water cement ratio and the water proofing compounds should be added with the concrete in contact with water. The design calculations must be recorded in the required minimum reinforcement in walls floors and the roofs and shall not be less than 3 percent and the bars used should be of the smallest diameter practicable under the design code manual prefixed by the Study made based on the data for RCC tanks .