1/2″ Deep Rib (1-1/2″ oc, Ribs in 4′ direction) 1/2″ Deep Rib (1-1/2″ oc, Ribs in 4′ direction) July 14, 2022 1/2″ Deep Rib (1-1/2″ oc, Ribs in 4′ direction)