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 for can be honeycomb paper of 22 gauge inverted hat shaped steel ribs, welded to outer face sheets running 6″ on center throughout the door.
Continuous bonding of code to metal face sheets.
Rock wool insulation fills gaps between ribs, packed to a specific density so as to act as a sound deadening material.