by Laredo » Sun Nov 14, 2004 9:04 pm
There's another way.
You'll need a bit you can drill through metal with, and some 2''x4'' stock. Mount a 2x4 the width you want your floor to be at each end of your trailer, bolting through the 2x4 and the trailer frame about 3'' from each end of the frame, and again about 3'' toward the center from each end, on the OUTSIDE of the steel frame. (Go ahead and countersink the lockwashers and nuts. You'll want this very thoroughly waterproofed!)
Put another pair of 2x4s on the INSIDE of the long frame rails, mounted and waterproofed the same way. Now you can bolt a 'cripple stud' to the OUTSIDE of the frame, thru the frame and the 2''x4'' and a block on the inside of the 2''x4'' for stability, one 10'' in front of the axle and one 10'' behind it. (If you're building more than 9 1/2' long, you may want to put another one halfway between the one in front of the axle and the front of the trailer). You can set a rim joist on the outside of these blocks and bolt your plywood floor to that. Now you have a frame you can insulate and/or enclose underneath. If you need more ground clearance substitute steel T-posts for the 2x4's and weld them across the underside of the HF frame.
Be aware the wooden frame I've just described will weigh approximately 75 pounds. I do not know the weight of the steel version but it would be at least equal and quite likely higher.
Mopar's what my busted knuckles bleed, working on my 318s...