Tandem Box Trailer

This plan is for a Tandem Box trailer with beam axle suspension and large box area in 3 popular sizes – 2400 × 1500 (8x5ft), 2700 × 1500 (9x5ft), 3000 × 1800 (10x6ft). The plan uses a tandem box body panel kit available from most trailer spares suppliers and a strong RHS chassis construction. Of course you can also manufacture the body panels if you wish – all the drawings and detailed dimensions are provided.

DIGITAL DOWNLOAD – Plans are delivered digitally immediately after payment to get your trailer build project going without delay.



  • 3 Sizes:      2400×1500(8x5ft), 2700×1500 (9x5ft), 3000×1800 (10x6ft)
  • Max ATM:      2400kg
  • Tare:      ±680kg (2700×1500)
  • Chassis Construction:      steel RHS (various sections)
  • Suspension:      Beam Axles & Leaf Springs
  • Options Included:      Spare wheel mount, ladder racks, tie-down rails…
  • Contents:       13 detailed part & assembly drawings, 13 page assembly guide, DXF files, pictures
  • File Size:      7.6MB (.zip)


More Info

  • 3 box sizes
  • All METRIC dimensions (mm only)
  • 13 detailed part & assembly drawings
  • 13 pages of assembly instructions
  • Spare wheel carrier on drawbar
  • Drop tailgate


Our Tandem Box trailer plans are some of the most detailed available. Not only do you get 13 part & assembly drawings typical to those shown here, but also a 13 page assembly guide, some DXF files and a number of pictures to assist you with the build.

A practical design, ADR compliant with all the necessary information and detail to get your tandem box trailer build project underway.

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.


Plan Contents

  • Several detailed and fully dimensioned part & assembly drawings (A4 size)
  • All dimension in metric units (mm), ISO weld symbols
  • Comprehensive work & assembly instructions
  • Electrical wiring diagram including round & flat plug wiring detail
  • Detailed (enlarged) views of tricky or important bits
  • Complete parts list of all manufactured & purchased components
  • Complete cut list of all steel sections
  • Welding details – where & how much of it
  • A design that conforms to legal requirements
  • Purchased item specifications
  • Safety guidelines during construction
  • Tools required
  • Pictures & handy hints
  • DXF files for parts that can be laser cut (Download a FREE DXF viewer here)
  • All files in PDF format

Our plans and instructions are very detailed, comprehensive and easy to follow. Depending on the plan you choose, you will get a number of detailed drawings – at least one A4 drawing for each major assembly such as chassis assembly, body assembly, various sub-assemblies (tailgate, ramps…) and all major parts. Check the plan specifications for details. Furthermore, you will get detailed instructions, parts lists and material cut lists.

Instant Downloads

Get your plans in a flash. Depending on the payment option you choose, you will receive a download link as soon as payment has been finalized so you can get your plans and be up and running straight away.

Download files are in .zip format and you will need a suitable decompression utility to extract the files. These utilities are often part of your computer’s operating system. If you’re having any trouble opening the .zip folder, download a FREE evaluation version of WinZip.