Monorail crane mr beams.
Roof purlin deflection criteria.
Dead load will be the actual weight of the roof steel and the roof purlins.
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Table r301 7 allowable deflection of structural members.
Mean roof height is not greater than 40 feet.
Other than plaster or gypsum board.
The cos of the purlin spacing is because the load on the purlins is vertical and the purlin spacing is with the run of the roof.
Plaster or gypsum board.
Other than plaster or gypsum board.
Roof sheathing is at least 7 16 thick oriented strand board or plywood.
Underhung crane uhc beams.
For sake of discussion we will assume a minimal roof snow load of 20 psf pounds per square foot and a 4 12 roof slope.
The attached list of criteria is met.
3 mezzanine beams and joists.
If that same joist had gypsum ceiling l 240 the allowable deflection is 0 6.
For example the allowable deflection of a 12ft span floor joist with plaster l 360 is 0 4 12ft divided by 360.
1x skip sheathing is.
Plaster or gypsum board.
Roof rafters roof joists and roof beams.
Allowable deflection as an expressed ratio of the clear span.
Floor beams floor joists and floor decking.
Top running crane trc beams.