BigLou,"at one time/sometime" they inserted wood Inside the thin wall tubing in the area for the Door Handrail,Before they welded the frame together! Some times they "Forget or use the wrong Tube"! I know this sounds "Crude" but for a Solid support,which a Handrail needs to have,Drill through the wall and make a "Decorative Plate" out of wood/metal that will allow a Solid sandwich for rail support! This area is usually where the Fire Ex is located,mount the Fire Ex or Key Holder on the New Plates and "No One" will ever know!
Youroo!!