Hollow Metal Door Types

• Click here for Hollow Metal Doors Specs
• G - Half glass (24" x 29")
• FG - Full glass (24" x 60")
• V - Vision lite (10" x 10")
• BL - Bottom louver
• NL - Narrow lite (6" x 36")
• SNL - Special narrow lite (5" x 20")
• MD - Dutch door
• 2G - Two lite door
• Air Louvers Lite Kit
• Anemostats Lite Kits & Louvers

Characteristics of Door Construction

"Standard door construction" varies by door manufacturer and door type

• 1 3/4" door thickness is standard for commercial use
• Beveled lock edges typical
• Square or beveled hinge edges available
• Inverted top and bottom channels
• Flush top and bottom channels integral with door construction or by addition of flush caps
• Visible hairline edge seams
• Seamless edges available

Grades & Levels of Steel Doors

Defined by the Steel Door Institute (SDI)

Level 1 Standard Duty 20 gauge, 1 3/8" or 1 ¾" thick door Model 1:  Full flush  Model 2:  Seamless

Level 2 Heavy Duty 18 gauge, 1 ¾" thick door Model 1:  Full flush  Model 2:  Seamless

Level 3 Extra Heavy Duty: 16 gauge, 1 ¾" thick door Model 1:  Full flush  Model 2:  Seamless  Model 3:  Stile & Rail

Level 4 Maximum Duty  14 gauge, 1 ¾" thick door Model 1:  Full flush  Model 2:  Seamless

Core Types

• Honeycomb
• Polystyrene
• Polyurethane
• Vertically Stiffened
• Mineral Fiberboard

U.L. Door Rating

• U.L. Door Rating