The belly pan isn't a structural part of the trailer. It keeps road spray, dirt and mice out.
5052 at .025 thick is what I've used and have on hand. I buy mine from Airparts in Kansas City. They sell it as Airstream belly pan material. I buy a 48" wide roll at the length I need to do my project.
I hang my belly pan material crosswise, or east west as it were. The cross members are generally on 24" centers, so the 48" width works pretty good. The main frame rails are about 62" apart. I also overlap the pieces about an inch. I start at the rear of the trailer and work my way forward. I "shingle" the pieces so road spray won't be scooped up by the seams.
David
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WBCCI #8607 VAC Region 11
KnowledgeBase trailer renovation threads: 69 Globetrotter, 76 Sovereign, 75 Overlander, 66 Trade Wind Such fun !
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