Is my 4107's structural integrity severely threatened by these cuts?
Is there any way I can put roof airs in place of the vents? Would replacing the 2x2 with steel be necessary/sufficient?
Does anyone else have experience with roof airs in the center of a GMC? Photos?
You need to replace the structural support that was removed by the PO cutting out the center rib.
But basically you need to put a support/rib on each side of the opening that runs fore and aft to next cross section.
I welded mine in and put a support cross wise on each side of the opening.
The opening edges new supports were riveted and bonded with Sikaflex.
I believe I have some pictures of my install on our 4905 at home, I will post them later.Cliff