Unistrut P1000 (or other) esr report
Unistrut P1000 (or other) esr report
(OP)
I'm working on a project in Anaheim, CA involving cable trays and unistruts. My boss, the structural principal at our firm, recently mentioned that we should mention the evaluation report since it's in California. Well, this put a monkey wrench in everything I was doing. Not only has this been done many times before (the project is in Disneyland) with the same client, but it's also an application (a channel strut) where I can't seem to find ANY manufacturer that provides a tested ICC report for a channel strut system. Can anyone help me on where I might find such a thing or if it's even needed?
Thanks,
OUe
Thanks,
OUe






RE: Unistrut P1000 (or other) esr report
Oddly, the strut capacities assume 42 ksi yield strength, but AISI would require specific member testing for strut shapes made from ASTM A653-33 steel to get above 39 ksi (by my calculations based on bend radii on the P1000 shape). Further, the max yield for a metal with Fu = 45 ksi, is 41.7 ksi (42?).
RE: Unistrut P1000 (or other) esr report
RE: Unistrut P1000 (or other) esr report
RE: Unistrut P1000 (or other) esr report
Did you include the little reverse 180 bend length inside in that theoretical calc for strength?
These have been standard for electrical and instrument mounts for years - Why would there be questions now?
RE: Unistrut P1000 (or other) esr report
RE: Unistrut P1000 (or other) esr report
RE: Unistrut P1000 (or other) esr report
What would happen if you actually designed the damn thing to do what it is supposed to do, instead of picking it out of a table? That’s what engineers used to be able to do, and did.
RE: Unistrut P1000 (or other) esr report
But I have other fights to win right now.
RE: Unistrut P1000 (or other) esr report
It's actually 2 90-deg bends. Inside radii are, from the slot, 1/32", 3/32", 1/32", and then symmetry.
41.7 ksi may be appropriate for the effective yield, but, in order to get there, someone needed to have done (and hopefully published) tension tests and stub column tests per AISI. In any case, don't forget the reduction factor for lateral bracing.
RE: Unistrut P1000 (or other) esr report
RE: Unistrut P1000 (or other) esr report
Has the jurisdiction commented on the need for ICC report yet or are you doing this preemptively? We do a lot of cable trays, ladder racks, and such here in California for OSHPD jobs and they usually don't questions the capacity of the structs themselves. They mainly comment on the bracing system, i.e. brace connections like the channel nut, expansion anchor to structure. For OSHPD projects, Mason Industries have an OPM approval from OSHPD for ducts and conduit seismic bracing. OPM 0043-13. Check that out and see if it helps.
Regards
DS
RE: Unistrut P1000 (or other) esr report
RE: Unistrut P1000 (or other) esr report