Multi-Rib is McElroy’s proprietary Variation with the industry’s standard R-Panel which is a multi-use roof and wall rib panel generally Utilized in pre-engineered metal building applications. An optional Purlin Bearing Leg (PBR) rests on purlins and supplies assist for fastening the panel lap. These are vulnerable to oil canning – https://ellenj220gfn7.blogdun.com/profile