For bolts that go through the U channel, sub-floor and outriggers/front and rear cross members, I use a 1/4"-20 hex head bolt with a thick fender washer or a piece of 1/4" thick aluminum plate under the bolt head.
In the curved areas of the corners that secure the U channel to the sub-floor only, I use an E bolt.
Enjoy your project!
1997 30' Excella
1961 26' Overlander
1954 22' Flying Cloud
1981 28' Airstream 280
San Antonio
, Texas
Join Date: Jul 2009
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So you are using 1/4"X..... " to hold the floor to the frame? The.... are what length?
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