new commercial door in place of windows
helping out my brother. Existing 2x6 KD wall in commercial building has a 4 mulled set of casements, maybe 8' wide x 4' high. They are placed so that the top is at approx. 8 feet. This is the non gable end of building with a trussed and tinned roof. There is no sag and it seems there must be a nice header in there.
The door going in is a 72" commercial steel exterior insulated door with no astigrigal. Other than this I havent gotten the specs yet. Before I tear the window out in the 30 degree weather, I'd like a plan. We'll shove the door rough opening to one side of the old window opening so the existing king and jack studs will be used. The other side of the door will have a king stud to the old header above and jack stud to a new header underneath. The rest is framed in with new studs and cripples if needed.
Question being what type of header should be used in this application. This will be inspected as it is part of a much bigger project. It's a little odd... I dont think anything done right would fail but I want the door to be secure and not move as well as I assume the locking system will engage at the centers.