Calculations for Overhead Water tank | Building Construction





Design of Overhead Water Tank | Design of RCC Structures

As per NBC (National Building Code, 2005) standards,

Water required per person per day = 150 litres

Drinking water = 4litres per person per day

Calculation for an overhead water tank for a 3 BHK Villa:

Let us assume the average family size = 5 persons in the house

Water required for daily chores per person per day as per NBC norms;

150 x 5 = 750 litres

Drinking water required:

4 x 5 = 20 litres

Total quantity of water required = 750+20 = 770 litres

Volume of water = 770/1000 = 0.77 cubic metres

Dimensions for the overhead water tank:

Length = 1.2m

Breadth = 0.6m

Depth = 1.1m

Total Volume = 1.2×0.6×1.1 = 0.792 cubic metres



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  1. #1 by Shed on November 8, 2011 - 6:33 am

    Building an overhead water tank does need a lot of calculation and many things to be thought about to give rise to an efficient construction. It would be better to give a platform built of steel and the required support from the base would do the work but then too there are certain factors that would vary with respect to place and a professional would be the best to guide here.

  2. #2 by M.Hemalatha on July 5, 2012 - 9:53 pm

    need the full design of over head tank

  3. #3 by Anuj on November 29, 2012 - 10:38 pm

    Please tell me how to construct watertank on my RCC terrace.

  4. #4 by prashanthkumar on August 2, 2014 - 1:56 pm

    sir i want to know the details and type design of over head balancing reservoir of different capacities and different staging

  5. #5 by Amit on October 8, 2014 - 1:47 pm

    Pls tell me how I know the material used in rcc over head tank is how much. (With staging).formula that used to calculate estimated cost value

  6. #6 by venkatesh on November 3, 2014 - 4:57 pm

    i want information about to construct a sump&over head tanks in rural water supply scheme.tell me if any latest techniques to construct a OHBR.

  7. #7 by satish on November 19, 2015 - 9:46 am

    it is very useful for basic design concepts need some more clarity

  8. #8 by Anupam on January 22, 2016 - 11:41 pm

    Alternative method :
    1 cubic foot = 28.3168 litres.
    Therefore to store 770 litres of water we need (770/28.3168=)27.192 Cft tank space.

    • #9 by pavan on March 30, 2017 - 11:08 am

      how to take dimension of the overhead water tank
      (L*B*D)

  9. #10 by Baldev Patel on October 13, 2016 - 6:48 pm

    I want the formula for calculation of Concrete quantity for overhead water tank dome..so please give me.

  10. #11 by vinod on October 21, 2016 - 11:42 pm

    Can a hole be drilled in adjacent concrete water tanks for water balancing? Size of the two tanks are 3000 m3 and 6000m3. Surface area of the common separating wall is 2 meter wide and 3 meter deep.

  11. #12 by VIGNESH M on October 25, 2016 - 9:13 am

    Plan for dm water tank

    Calculations for Overhead Water tank
    Bill of Materials

  12. #13 by M.M.Dhanaraj on November 29, 2016 - 5:10 pm

    M.Hemalatha :
    need the full design of over head tank

  13. #14 by M.M.Dhanaraj on November 29, 2016 - 5:12 pm

    M.M.Dhanaraj :
    Require Storage water Tank for20 Persons

  14. #15 by Prashant Pharate on December 13, 2016 - 5:04 pm

    Hi,

    We have 21 flats in a building and we all want to set water tank 500 lit/each because of water issue. Our terrace area is 5000 sq feet. Is it OK if we fit water tank on terrace. Can it be problem to building structure in future

    • #16 by BenzuJK on January 7, 2017 - 7:36 pm

      Do you mean 21 water tanks 500l each?

  15. #17 by sajeev cheeran p on January 11, 2017 - 6:55 pm

    the overhead water tank capacity required for using 18 houses.

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