Exterior Wall Metal Stud Design Wind Loads?
Exterior Wall Metal Stud Design Wind Loads?
(OP)
Doe the IBC allow reducing wind loads on metal studs for deflection checks?
A vendor claims that the code allows it but it seems counter intuitive to reduce a code derived loading and then apply the reduced load to a specified deflection.
A vendor claims that the code allows it but it seems counter intuitive to reduce a code derived loading and then apply the reduced load to a specified deflection.






RE: Exterior Wall Metal Stud Design Wind Loads?
RE: Exterior Wall Metal Stud Design Wind Loads?
Mike McCann, PE, SE (WA)
RE: Exterior Wall Metal Stud Design Wind Loads?
I'd like to find out the reasoning behind the load reduction.
RE: Exterior Wall Metal Stud Design Wind Loads?
RE: Exterior Wall Metal Stud Design Wind Loads?
Then goes on to indicate the second aspect they reference is the switch from allowable to ultimate level for wind. Reduction factor in 2012 IBC is actually 0.7x0.6=0.42.
Interesting to note that that factor increase as wind speed increases. For my area the base wind speed is 105 mph, which has a factor of 0.74 to convert from 50 year to 10 year. It's not codified this way, but following their logic I could argue for an even bigger reduction of 0.74x0.74=0.55 (versus 0.7 for lower speeds) on my components and cladding loads for deflection checks.
RE: Exterior Wall Metal Stud Design Wind Loads?
It seems that the trend around here as of late is more severe weather more often.
Thanks again for all the information.
RE: Exterior Wall Metal Stud Design Wind Loads?