mw4man Posted July 14, 2018 Report Share Posted July 14, 2018 hello again... In my travels this week, I inspected a building that had: Steel Roof Trusses Metal Stud Exterior Walls, sheetrocked on the inside; & sided w/ T1-11 wood panels on the exterior (at least I believe they were metal studs...looked like 2X6 nominal...maybe cold-formed load bearing exterior wall metal studs?) The building was constructed in the 1990's (according to the insured). Is this an ISO Class III (light non-combustible)...???...or is it ISO Class I simply because it's frame construction? (reason I'm asking is...I've never come across steel roof trusses on a frame building) thanx, MF Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted July 15, 2018 Report Share Posted July 15, 2018 I'm assuming this inspection was a loss control survey for an underwriter. A building inspection would identify type, not insurance class. After the '08 crash, I did alot of work for commercial insurers for 2 years. If you confirmed the steel wall framing, you might be able to consider it mixed construction and then try to apply the 2/3 rule. Cold-rolled, light-gauge framing supporting loads however, is more likely to be class 1. Where there any interior load bearing walls? Unprotected light gauge steel is Class 1 Quote Link to comment Share on other sites More sharing options...
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