Hollow Metal Doors
At Capitol Fireproof Door our hollow metal doors are made of the highest quality open-earth, cold-rolled, pickles, patent-leveled sheet steel. Every door is engineered to meet or exceed the architectural requirements for full flush doors.
The inner core can be honeycomb or 22 gauge inverted hat shaped steel ribs, welded to outer face sheets running 6 inches on center throughout the door.
Continuous bonding of core to metal face sheets.
Rock wool insulation fills gaps between ribs, packed to a specific density to act as a sound deadening material.