mpanzar Posted October 20, 2021 Share Posted October 20, 2021 I am currently replacing the rear section of the floor on my 18ft Sunrader and am looking for the red dimension shown in the image below. The reason I'm replacing the floor is because I noticed the rear end of the fiberglass shell was resting on the vehicle frame. My plan is to put spacers between the frame and shell (as shown in the picture). Next I'm going to weld in a new sub-frame and then attach 3/4" marine grade plywood to the new sub-frame. finally ill fiberglass the shell to the plywood and remove the spacers. If other owners could provide this dimension I would appreciate it. Any additional advice, tips & tricks, or experience is welcome. Quote Link to comment Share on other sites More sharing options...
mnkywrench Posted October 28, 2021 Share Posted October 28, 2021 in my sunrader (1984) the fiberglass part is splitting past the frame between the floor and the frame rail. the frame underneath is a 1" x 2" square tubing. it looks like yours so maybe that might be it Quote Link to comment Share on other sites More sharing options...
mpanzar Posted October 28, 2021 Author Share Posted October 28, 2021 @mnkywrench is your shell resting on the frame in the rear where the red arrow in the photo is? Quote Link to comment Share on other sites More sharing options...
linda s Posted October 28, 2021 Share Posted October 28, 2021 So I measured mine on an 86 18ft Sunrader. The fiberglass is 3/4 of an inch away from the frame on the passenger side but the drivers side that my generator is on is only about 1/4 of an inch away. Generator weighs around 100 lbs and when I got the camper the generator mounting screws were mostly missing so it had been bouncing around way more that it should have. Hasn't seem to sag any since then. Yours looks fine to me. I see no sag there at all Linda S Quote Link to comment Share on other sites More sharing options...
mpanzar Posted October 28, 2021 Author Share Posted October 28, 2021 Thanks @linda s that's the info I am looking for. At the moment I've got .75" blocks on both sides supporting the shell off the frame. ill keep that distance and glass it in! Quote Link to comment Share on other sites More sharing options...
mnkywrench Posted October 30, 2021 Share Posted October 30, 2021 I measured it ad it is 3/4 inch space as well Quote Link to comment Share on other sites More sharing options...
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