- 1). Cut out the bed retaining strap. At the rear of the utility trailer bed is a strap of angle iron that has been welded at each end to keep the bed in place. Using a torch or grinder, cut through the welds and remove the strap. In some cases this retaining strap is bolted on.
- 2). Cut off all of the old bolt heads used to hold the bed planks to the trailer frame. It is easier to cut them off. Most of the time the rusted nuts will not loosen. Remove the old planks and count them. The bed is designed to use standardized, dimensional lumber.
- 3). Replace the planks. This is where problems arise unless the right material is used. Untreated pine is easy to find, but will rot quickly. Pressure treated pine will last much longer; if using a soft wood is not a problem, it's a good choice. If heavy iron or steel or stones will be tossed into the bed, pine cannot take the abuse. Oak must be used. Rough cut white oak is the best choice due to its toughness and water resistance.
- 4). Drill holes in the planks and install new nuts and bolts. Stainless steel nuts, washers and bolts are a good choice to prevent rust. Install the rear retaining strap by a bolt-in or weld-on procedure.
Source...