Corrugated This panel has served us well for decades on industrial and agricultural building roofs. Typically, this panel has 32” coverage with rib centers (A) spaced at 2.67” and a rib height (B) of 7/8”. Please note however, it has been manufactured with rib centers of 2-1/2”, 2-3/4” and 4.20” with rib heights of 1/2” to 1-1/2”. To help calculate A (rib centers): you may try the following measure 9 Ribs = 24” (2.67” Rib centers) measure 8 Ribs = 20” (2.50” Rib Centers) measure 8 Ribs = 22” (2.75” Rib Centers) measure 5 Ribs = 21” (4.20” Rib Centers) |