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Open-web steel joist are to be used for a roof with a live load of 100...

Open-web steel joist are to be used for a roof with a live load of 100 psf and a dead load of 35 psf (not including the joist weight) on a span of 26 ft. Joists are 2 ft on center, and deflection is limited to 1/360 of the span under live load only and to 1/240 of the span under total load. Please show work a)Select the lightest possible joist b)Select the shallowest depth possible joist

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