![]() The safety factor of five is used in the traditional listing requirements for hangers and is also found in the performance-based criteria of 9.1.1.2(1). Other types of hangers are generally required to be able to support five times the weight of the water-filled piping plus 250lb. "A trapeze hanger, as shown in Exhibit 9.2, must be capable of supporting the weight of the water-filled piping plus 250lbs. I'm thinking my last go around with this was a shared support situation (see 9.1.1.3.1.1 13-16 Ed.), but in a sprinkler only assembly I probably lost an argument.Īttachments from structure to Unistrut & the Unistrut to the pipe does require the 5x per 9.1.1.7.5 but the actual Unistrut only needs to comply with 9.2.1.3.1 Dave - Na.call me out, I'm gonna get it wrong (and I did so nice catch) and I'm fine with it (wish I could edit the statement above so others don't read and apply things incorrectly - ahem.Joe? wish list for the forum).
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