Mega Ribs Sections shall be 2" thick roll formed commercial quality 22 gauge steel, hot-dipped galvanized per ASTM A-924, A-653, phosphate coated, prepainted with primer and baked-on polyester top coat.
Five 2" deep reinforcing ribs on 6.5" centers complemented by five 1" flat sections on 6" centers.
Galvanized end stiles to wrap face of section by full 1-3/8", minimum 18 gauge.
All turn-down center stiles 18-gauge galvanized.
Bottom section reinforced with full length .050" aluminum astragal retainer. Astragal to be
U-shaped flexible PVC vinyl. Meeting rails to form weathertight shiplap joint.