Multi-Rib is McElroy’s proprietary Model on the business’s conventional R-Panel which is a multi-use roof and wall rib panel largely Utilized in pre-engineered metal making applications. An optional Purlin Bearing Leg (PBR) rests on purlins and provides guidance for fastening the panel lap. We use cookies on our Web page https://andrewh006hla1.fliplife-wiki.com/user