BUILDING DESIGN CONSIDERATION AS PER NBC:205

DESIGN CONSEDERATION AS PER NATIONAL BUILDING CODE

DIMENSION

Height of first storey of building= 3.2 m (10' 6")

Height of Upper storey of building= 2.8 m (9'2")

No. of bays in length as well as width does not more than 6 bays as well as less than 25 m.

The length between each bays does not more than 4.5 m c/c.

Length should not be greater than 3 times of width.

The ratio between height to length and height to width should not be greater than 3.

Cantilever flor 1 m from center of beam.

CONCRETE ,MORTAR

Concrete having thickness 100 mm and above use 20mm graded aggregates

Concrete having thickness 40 mm to 100 mm use 12 mm graded aggregates

Minimum crushing strength of concrete used for footings, column, beams etc is 15 N/MM2 at 28 days for 150 mm cubes.

Minimum thickness of slab used for roof and flooring is 100 mm (4")

Thickness of mortar in brick work is 10 mm

Thickness of internal wall 115 mm (5 inch)

Thickness of external wall 230 mm (9 inch)

Cement sand ratio for 115 mm  brick wall 1:4

Cement sand ratio for 230 mm  brick wall 1:6

BEAM AND COLUMN

Minimum size of column= 230 mm*230mm (9 inch*9inch)

Minimum size of beam    = 230 mm* 325 mm

Plinth beam                     = 230 mm* 200 mm

CLEAR COVER

Footing= 50 mm

Column = 40 mm

Beam    = 25 mm

Slab     = 15 mm