Box Trailer

This plan is for a tough, flexible and versatile single axle box trailer in a range of sizes from (8 x 5 ft.) 2400×1500. The body parts can be purchased at most trailer suppliers.

Included in this Trailer Plan
  • Drawings
  • Pictures
  • Part and cut lists
  • Construction tips
  • Cage drawings
  • General advice
  • All in PDF file Format

This plan contains some DXF AutoCAD files



The Subframe is of strong RHS with plenty of support using 4 cross members and the drawbar connects to the front spring hangers, which gives the trailer extra strength.

Featured is a Drop Tailgate with a hinge setup that requires no maintenance.

With the plans, you will be able to build your own trailer, as there are so many options available with Mudguard gussets and Trailer Side Panel gussets, and Box Trailer kits ranging from a height of 300 mm – 520 mm. You can make the Box Trailer Braked or Non-Braked.

Mudguard Gussets for extra strength for the Mudguards

7 Leaf Eye to Eye Springs, as an option leaf springs can be used.

This Cage is easy to fit and remove when not needed, the Cage is Built on an angle frame that locates inside the edges of the side and front panel, with two bolts holding in in place.

The rear gates of this Cage fold back around to the side for better access.

A removable rear H Rack Bar gives the sides of the cage strength, meanwhile still being able to remove it for loading the trailer especially with fork lifts etc

Rattle catches for easy securing the rear gates.

The Front and Rear Side Gusset give the Trailer strength and protects the Tail Lights from damage.

The plans conform to the Australian National Code of Practice – Building Small Trailers (VSB1). Trailers built to comply with this code of practice can be registered for on-road use in Australia


    Heavy Duty Single Axle Box Trailer
  • Size – 8 x 5 ft. (2400 x 1500 mm)
  • Gross Vehicle Mass (GVM) of up to 2000kg
  • Weight of Trailer (ATM) approximately 350kg with cage
  • Chassis Construction – RHS
  • Suspension-7 leaf eye to eye Springs
  • (Optional) Slipper Springs
  • Spare wheel mount
  • Tie Rails
  • Spare Wheel Mount
  • Drop tail gate
  • Removable Cage with dual opening doors
  • Removable rear top bar
  • Mudguard Gussets
  • Trailer side panel gussets
  • Swing up Jockey wheel