Dimensions of Precast Elements

The preferred dimensions for different elements of a building considering the basic module are as follows:

1. Flooring and Roofing Scheme

Precast slabs or other precast structural flooring units:

1. Length – Normal length shall be in multiples of 3 M
2. Width – Normal width shall be in multiples of 1 M and
3. Overall thickness – Overall thickness shall be in multiples of M/4

2. Beams

1. Length – Normal length shall be in multiple of 3 M
2. Width – Normal width shall be in multiples of M/4 and
3. Overall depth – Overall depth of the floor zone shall be in multiples of M/4

3. Columns

1. Height – Overall depth (i.e., floor-to-floor or the clear height) shall be in multiples of 1 M for heights up to 2.8 M, and for heights above 2.8 M it shall be in multiples of 2 M
2. Lateral dimension – Overall lateral dimension or diameter of columns shall be in multiples of M/4

4. Walls

1. Thickness – Nominal thickness of walls shall be multiples of M/4

5. Staircase

Width – Nominal width shall be in multiples of 1 M

6. Lintels

1. Length – Nominal length shall be in multiples of 1 M
2. Width – Nominal width shall be in multiples of M/4 and
3. Depth – Nominal depth shall be in multiples of M/4

7. Sunshades/Chajja Projections

1. Length – Nominal length shall be in multiples of 1 M
2. Projection – Nominal length shall be in multiples of 1 M

Normally acceptable methods of finishes for these components are:

1. Moulded concrete surface to design.
2. Laid-on finishing tiles fixed during casting.
3. Finishes obtained by washing, tooling, grinding and grooming of hardened concrete.
4. Exposed aggregates in-situ.
5. Finishes added in-situ.