VegasFlyer Posted March 26, 2018 Report Share Posted March 26, 2018 We used hardwood spacers. Delrin would be a good alternative. Unless you are an engineer, or play one on tv, I would not recommend trying to design a bed that you are going to try and eliminate movement between the bed and truck frame during twisting. John Southern Nevada 2008 Volvo 780, D13, I-Shift 2017 Keystone Fuzion 420 Toyhauler 2017 Can-Am Maverick X3-RS Link to comment Share on other sites More sharing options...
runaway parents Posted March 26, 2018 Author Report Share Posted March 26, 2018 To the bed also the frame Link to comment Share on other sites More sharing options...
Pete Kildow Posted March 26, 2018 Report Share Posted March 26, 2018 The TriAxle dump trucks I ran. And we took the beds and third axle off every fall. Turning them into a day cab tractor. They did not have anything between the frame and bed frame. This was with hauling 24 to 26 tons in that 16ft bed. I would have though the factory would have used something if needed. Three of these trucks were ordered ready to haul in. Pete Link to comment Share on other sites More sharing options...
noteven Posted March 27, 2018 Report Share Posted March 27, 2018 The more you isolate a stiff body from the middle of the frame the smooooother the ride .... “But” .... commercial truck OEM’s don’t usually take into consideration the placement of a trailer connection in the next county back of rear axles "Are we there yet?" asked no motorcycle rider, ever. Link to comment Share on other sites More sharing options...
Lance A Lott Posted March 27, 2018 Report Share Posted March 27, 2018 The factory bed on my pickup has nothing, it bolt directly to the frame. What do your campers have? My old Avion has a under skirt so I can't see. The bed on my ton truck bolts directly but I believe that was added. Link to comment Share on other sites More sharing options...
Lance A Lott Posted March 27, 2018 Report Share Posted March 27, 2018 I parked next to a refrigerated box truck today when I was picking up my son. So I looked under it. Amazing what will entertain some people. It has 2 inch hardwood, oak I think, between the frame and the box subframe. It was clamped down, very hard, with u bolts about 5' apart. It looked to me that it was clamped so tightly that the amount of isolation between the two frames would be none existent. There were no springs on the u bolts. It looked like,they used the wood to get enough room over the tires when aired down. Link to comment Share on other sites More sharing options...
rickeieio Posted March 27, 2018 Report Share Posted March 27, 2018 16 hours ago, Lance A Lott said: The factory bed on my pickup has nothing, it bolt directly to the frame. Pick-up beds twist, and they're short. Most of the beds we're using are pretty stout, and will likely break if forced to twist. Our bed is built in segments and thus can flex a bit. Well, actually a lot. KW T-680, POPEMOBILE Newmar X-Aire, VATICAN Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row Young enough to play in the dirt as a retired farmer. contact me at rickeieio1@comcast.net Link to comment Share on other sites More sharing options...
Lance A Lott Posted March 28, 2018 Report Share Posted March 28, 2018 https://www.google.com/url?sa=t&source=web&cd=24&ved=0ahUKEwjAgenFiY_aAhXG34MKHWXxCb0QFghaMBc&url=https%3A%2F%2Fwww.macktrucks.com%2F-%2Fmedia%2Ffiles%2Fbody-builder%2Fmanuals%2F7-frame.pdf%2F&usg=AOvVaw125s6zLDwbmtaUgWmouH0a This is hopefully a link to Mack Trucks instrutions for body mounting. If you don't wont to read it all the condensed version says filler naterial is for taking up difference in the frames. One option they offer is subframe directly on truck frame rigged bolting or u bolts. Flexable mounting is to be used with a rigid body such as a tank to protect the truck frame. Lots of pictures and interesting reading. It also says if using u bolts or other flexible mounting method you have to put a stopper front and rear of the subframe so it cant shift. Also you have to put a metal filler in the frame channes to prevent crushing of the frame web. Hope this is of interest. Just hit download if it asks you to. Link to comment Share on other sites More sharing options...
runaway parents Posted April 1, 2018 Author Report Share Posted April 1, 2018 Link to comment Share on other sites More sharing options...
runaway parents Posted April 1, 2018 Author Report Share Posted April 1, 2018 Managed to finally get a picture of my bed build on the forum . Link to comment Share on other sites More sharing options...
runaway parents Posted April 1, 2018 Author Report Share Posted April 1, 2018 T.his pic was took last fall did not change much buy the time I shut project down for the winter will get some latest ones soon Link to comment Share on other sites More sharing options...
jenandjon Posted April 1, 2018 Report Share Posted April 1, 2018 On 3/24/2018 at 8:01 AM, runaway parents said: Hmmm is there something a person can use that wont decay? Our farm trucks have composite 2x4s under the box. Solid plastic. I just used some rubber strips where my bed makes contact. Farmer, Trucker, Equipment operator, Mechanic Quando omni flunkus moritati-When all else fails, play dead I'm a man, but I can change, if I have to, I guess. Link to comment Share on other sites More sharing options...
Little Posted April 2, 2018 Report Share Posted April 2, 2018 From your pic one can see that you plan to tow from the bed. As well your bumper is not attached directly to the frame so I would not put anything between frame and bed, nor would I use clamps to attach bed to frame. Bolt it solid is what we do. I have seen truck bodies that are clamped on that have come loose from bumper towing. One was a sandblast outfit only towing a compressor. That's a nice bed, bolt it down with some 5/8 grade 8 bolts and get on the road.YMMV 2004 Volvo 780 singled long Eclipse Attitude toyhauler 79 Shovelhead Electraglide Link to comment Share on other sites More sharing options...
runaway parents Posted April 3, 2018 Author Report Share Posted April 3, 2018 yup definitely 5/8 grade 8 bolts should do it Link to comment Share on other sites More sharing options...
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