1-3/4" thick polyurethane core. Available in 20, 18, 16, and 14 gage. Galvanized steel also available in AG0 or G90. Face sheets are totally supported by rigid polyurethane for increased impact resistance. Superior insulating characteristics. "R" Factor: Calculated value of 11.5(Reference: 1" Thermal Pane Glass R = 2.0) "U" Factor: Calculated value of 0.087 "STC" (sound transmission class) rating: 26 Full flush (seamless) faces. Seamless edges available. Inverted top and bottom end channels welded to both face sheets for added stiffness. Optional steel or vinyl closing caps available. Hinge reinforcement 7 gage steel (3/16" plate).
