Energy efficient Imperial doors stand up to rugged traffic conditions.
Imperial doors are furnished with a foamed-in-place polyurethane core to assure excellent insulating characteristics plus, exceptionally flat surfaces complete chemical bonding of all interior surfaces. Entrapped polyurethane foam provides a stable, durable insulation, superior to other foam products. Lock edge beveled 1/8" in 2" tight closure appearance.

• 1-3/4" thick polyurethane core.
• Available in 20, 18, 16, and 14 gage. Galvanized steel also available in G90.
• Face sheets are totally supported by rigid polyurethane for increased impact resistance.
• Superior insulating characteristics.
• "R" Factor: Calculated value of 11.01(ASTM C518) (Reference: 1" Thermal Pane Glass R=2.0)
• "U" Factor: Calculated value of 0.091(ASTM C518)
• "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 closing caps available.
• Hinge reinforcement 7 gage steel (3/16" plate).
• High recycled steel content for LEED points up to 57.1% 

Imperial Duty Grade

• 20 gage - Level I , Standard Duty
• 18 gage - Level II, Heavy Duty
• 16 & 14 gage -- Level III, Extra Heavy Duty