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Lunna [17]
3 years ago
7

A three-story school has interior column bays that are spaced 25 ft apart in both directions. If the loading on the flat roof is

estimated to be 20 lb/ft2, determine the reduced live load supported by a typical interior column at ground level.
Engineering
1 answer:
Lady_Fox [76]3 years ago
7 0

Answer:

Explanation:

Floor Load:

Lo= 50psf

At= 25x25 = 625 square feet

L= Lo(0.25 +15/\sqrt{KuAt)}

L=50(0.25+15/\sqrt{(4)(625)}= 13.1psf

%reduction= 13.1/50 = 26%

Fr= 3[(13.1psf)(25ft)(25ft)+(20psf)(25ft)(25ft)]= 62k

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