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According to the CBRI, what is the specification adopted for floors for single and doublestorey buildings?

According to the CBRI, what is the specification adopted for floors for single and doublestorey buildings? Correct Answer 38 mm thick cement concrete 1:2:4 laid over 11.5 cm thick cement concrete 1:5:10

Explanation:

As per CBRI, the specification for the flooring for different zones in the nation is described in the document titled: Zone Wise Economic Specifications for Building Construction, 26 August 2011

Specification for flooring:

The base for the ground floor

Over rammed earth, a 10 cm thick sand layer shall be laid. The base concrete shall comprise:

a) 75 mm thick 1: 8: 16 cement concrete;

Or

b) 18: 32: 100 lime concrete as specified in foundations.

c) Lime base product: sand: 40 mm and down aggregate in 1: 3: 6 mix as per specification for the foundation.

Wearing coat for the ground floor and intermediate floors

a) 25 mm thick 1: 2: 4 cement concrete with 12 mm and down stone aggregate and finished smooth.

Or

b) Burnt clay/tile flooring laid with 1: 4 cement sand mortar or clay flooring tiles 2.5 cm thick laid in ALPM: sand: 2 mortar.

Based on the above data, we can deduce that, 38-mm-thick cement concrete 1: 2: 4 laid over 11.5-cm-thick cement concrete 1: 5: 10 is the most appropriate option.

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