How to Build a Trailer

This article provides instructions to build a trailer for useful purposes. It can be pulled behind a truck or a car. Its size is 10’ in length and 6’ in width. However lighting or licensing of the unit will not be discussed.

Materials Needed

  • Axle and wheel assembly
  • Wheels
  • Tires
  • 102’ of angle iron
  • Female end of trailer-hitch
  • Sheet metal 35”x36”
  • 1” x 4” boards
  • Leaf spring assembly not less than 25” in length

Build Trailer

Tools Needed

  • Metal marking chalk
  • Welding equipment
  • Cutting torch
  • Large C-clamps
  • Impact wrench and appropriate sockets
  • Hammer

Instructions

  1. For building the frame, the 4 lengths of angle iron 10’ long have to be cut. 3 lengths of angle iron 6’ long have to be cut. 2 lengths of angle iron 4’ long have to be cut. 8 lengths of angle iron 18” long have to be cut. They have to be laid out accordingly as illustrated in the diagram and the placements have to be marked as noted. The 18” support angle irons have to be welded at each corner of the 10’ angle iron piece. Take a measurement of 51” from the rear of the frame, then the center for the front spring hanger has to be marked. The front spring hanger has to be welded in place. Weld one 18” angle iron on the front side. Take a measurement from the center of the front spring hanger 25” backwards; this point has to be marked as center for the rear spring hanger. The rear spring hanger has to be welded in place. One 18” angle iron has to be welded at the back of the rear spring hanger. The distance between the front of the frame and the 18” angle iron in front of the front spring hanger has to be divided in half. This point should be marked for placement of the last 18” angle iron on this side. The under-support irons have to be welded ahead of the 18” irons in front of the spring hanger and at the back them to the rear of the back spring hanger. This process has to be repeated for the other side.
  2. For constructing the Towing Tongue, two 72” lengths of angle iron have to be cut and then the trailer floor has to be turned upside down. One end of the 72” iron has to be placed against the front 6’ support beam present in front of the front spring hanger on each side. Use C-clamps to clamp in place. The front sections of the 72” lengths have to be brought together and the coupler for the female hitch should be attached and welded securely to this joint. The back of the tongue beams clamped to the frame have to be weld. For additional safety, each joint that touches the tongue should be welded.
  3. For assembling the axle, the spring assembly has to be attached to the spring hangers. The axle and wheel assembly have to be placed on the wheel assembly. The tires and wheels can be now mounted.
  4. For the flooring, the boards have to be cut into approximately 10’ in lengths. The boards have to be laid on the floor frame for filling in the floor area. 2-6’ lengths should be cut and then they have to be screwed to the outer boards of the flooring. Each board has to be screwed to the cross section created by the two boards. The floor should be no removed and turned so that the cross sections place themselves at the bottom of the frame. Holes have to be drilled through the cross sections, then the angle iron has to be marked below. The floor should now be removed and holes have to be made into the angle iron at the marks. The floor has to be now replaced and planks should be bonded into place.
  5. For the fenders, the sheet metal has to be cut into two sections measuring 35”x18” each. 4” has to be measured from one end on both sheets and both sides of each sheet have to be marked. Forward spring hanger has to be welded to the front of overhanging angle iron. 6” has to be measured from the free end and has to be marked as earlier. The sheet metal has to be in bending position for welding at this mark to the rear overhand.