Building Bye-Laws and Standard Size of Building Components

What are Building Bye-Law:-

Building Bye-Laws are the restriction laid down by municipal, urban development authorities and other government department a town planning trusts related to clear space to be left around the building, permissible construction area, etc hence the proposed plan of the building is to be prepared according to the bye law which is checked and approved by above authorities. This decides the standard size of building components.

1) In order to be free from weathering effects and for better stability, the minimum depth of foundation is kept 1m below the ground level. The width of the foundation should be such that the stress on the soil is within its safe bearing capacity.

2) Minimum dimension for plinth: Plinth height may be 300 mm to 600 mm but 450 mm is more common. For waterlogging prone and important buildings, the minimum plinth height is 600 mm. With greater plinth height, the building gets a majestic appearance.

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3) Plinth area should be a minimum of 1.2 times the floor area of the building. Minimum width of the footing is 100 m more than the one above and a minimum depth of footing is the depth of the standard brick 100 mm. When a number of footings are to be provided preferably their depths are kept equal. The width of the cement concrete bed of foundation = width of the brick footing immediately above the concrete bed + 100 mm + 100 mm. (i.e. 100 mm is the minimum offset for concrete bed).

5 ) Thickness of the damp proof courses 20 mm to 25 mm.

6 ) Thickness of cement concrete floor is a minimum of100 mm plus floor finish over it. Floor finishes are generally with 10 mm to 20 mm thick cement mortar or tiles.

7 ) Ceiling height (i.e., headroom) for main rooms of the residential building should be 3000 mm to 3600 mm. For bath and W.C. the ceiling height may be 2000 mm to 2750 mm.

8 ) The carpet area should be 50 to 65% of the floor area.