Does anyone know what "safety factor" is built in to a roof truss for snow load.?
if, say ,the trusses are calculated to a roof snow load of 47 psf (live load) we assume that an additional load of 1 lb per sq ft(4
would not collapse the truss, But at what point would the truss actually become close to or actually break, etc.
This has always been a puzzle.
Any one have any info,? it would be much appreciated.