Rusted plates on MPC truss, how to analyze
Rusted plates on MPC truss, how to analyze
(OP)
My client had me inspect his warehouse roof system consisting of metal late connected trusses. The 3.5" thick foil backed insulation seems to have caught the moisture in such a way as to induce rust in the top chord plates.
Is there a method to verify the existing strength of these metal plates?
Is there a method to verify the existing strength of these metal plates?





RE: Rusted plates on MPC truss, how to analyze
You can inspect the plates up close (magnifying glass) to see if the tongues have been pulled out of the wood surface, and also to see what sort of section loss on any one plate might have occurred. That would be my first steps if I was forced to evaluate them.
RE: Rusted plates on MPC truss, how to analyze
Garth Dreger PE
AZ Phoenix area
RE: Rusted plates on MPC truss, how to analyze
can you give me a link to find the TPI book?
Is there a software would you recommend in general for analyzing MPC trusses. I am running across them more often it seems.
Thanks.
RE: Rusted plates on MPC truss, how to analyze
Garth Dreger PE
AZ Phoenix area
RE: Rusted plates on MPC truss, how to analyze
RE: Rusted plates on MPC truss, how to analyze
thanks everyone
RE: Rusted plates on MPC truss, how to analyze
(not that we are dealing with direct pullout here, but I can imagine pullout of the teeth as a failure mechanism)