Need help with attaching floor to frame

[zlamb0002]

I am using a 4x8 Harbor Freight trailer I was looking and there are bolts in each of the corners. How do I need to attach the floor, get longer bolts that go through the floor and the 4 corners?

[tinksdad]

I encountered the same thing. After careful consideration, and making sure the trailer frame was square and all bolts were tightened to the best of my ability, I used my router and cut recesses in the floor framing for the bolt heads to reside in. If I ever have to access those bolts, it may be a problem; but my body is constructed in such a way that I should be able to jack the whole thing off the frame intact if necessary. Hope I never have to though.

[looped]

paddle bit through the floor for access or replace the bolts with carriage bolts so you wont have to accesss the top to tighten it. a paddle or forstener bit would be good to make a dimple for clearance

[boardhead]

After you bolt your floor to the frame, fill in the holes with the bolt heads with epoxy or similar.
I had to remove the body of my tear from the frame after being rear ended. Removing the nylox nuts, without access to the bolt heads, was a huge pain because the bolts kept turning. After raising the body, removing the bent up Harbor Freight trailer and replacing it with a new one, replacing and tightening the nuts was again extremely difficult.
Sealing the bolt heads during the build with something to keep them from turning would have saved me at least two days of work during the rebuild.

[t-vicky]

I used the carriage head bolts with some expoxy on them. I took an old tire & cut some 3" squares from the side walls & used them for pads between the floor & frame.