Open-web steel joists are to be used for a floor with aunit live load of 75 psf and a unit dead load of 40 psf (not includingthe joist weight) on a span of 30 ft. Joists are 2 ft on center, anddeflection is limited to 1∕240 of the span under total load and 1∕360 ofthe span under live load only. Determine the lightest possible joistand the lightest joist of least depth possible.
Open-web steel joists are to be used for a floor with aunit live load of 75 psf and a unit dead load of 40 psf (not includingthe joist weight) on a span of 30 ft. Joists are 2 ft on center, anddeflection is limited to 1∕240 of the span under total load and 1∕360 ofthe span under live load only. Determine the lightest possible joistand the lightest joist of least depth possible.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Open-web steel joists are to be used for a floor with a
unit live load of 75 psf and a unit dead load of 40 psf (not including
the joist weight) on a span of 30 ft. Joists are 2 ft on center, and
deflection is limited to 1∕240 of the span under total load and 1∕360 of
the span under live load only. Determine the lightest possible joist
and the lightest joist of least depth possible.
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