Civil Engineering - Building Construction - Discussion

The deflection in case of nailed laminated beams, joists, purlins, battens and other flexural members supporting brittle materials like gypsum, ceiling slates, tiles and asbestos sheets shall Dot exceed 1/480 of the span. The deflection in case of other flexural members shall not
exceed 1/360 of the span in case of beams and joists and 1/225 of the freely length in case of cantilevers.

Solve this problem. I am doubt for question.

Please any one explain this question.

Option D is right. I agree.

It's a right answer. I too agree.

Can anyone explain this question?

What is the unit of length (L)?

IS 4983 clause 5.2/
And for flexural members it is L/360 where L=Span.

The answer is L/325. I referred in some text books.

As per CI. 5.2 of IS 4983:1986;

(i) The deflection in case of nailed laminated beams, joists, purlins, battens and other flexural members supporting brittle materials like gypsum, ceiling slates, tiles and asbestos sheets shall not exceed 1/480 of the span.

(ii) The deflection in the case of other flexural members shall not exceed 1/360 of the span in the case of beams and joists and 1/225 of the freely hanging length in the case of cantilevers.