Have the situation of an existing metal building with no documentation and unknown manufacturer. The owner's property insurer wants to verify that the existing 8" Zee roof purlins are adequately braced. The purlins are 24' span @ 5' o.c. with (1) 4" channel attaching the purlin midpoints in...
Trying to verify some old light pole towers for new, larger light fixtures. They are tapered round steel, not polygonal, with slip overlap splices and about 3/16" to 1/2" thick. With no original documentation available, wanted to know what like steel grade might have been used for these if...
