How to build your own truck bed toolbox

Written by cassie skelley
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How to build your own truck bed toolbox
Build a custom toolbox for your truckbed. (tool bag and tools 1 image by Warren Millar from

A truck tool box sits in the back of your truck bed up against the side or secured in place at the back. A tool box carries all of your many tools and other supplies, and is useful for people who use tools frequently for their daily activities or job. You can make your own custom tool box for your truck in a few easy steps.

Skill level:

Things you need

  • 3/8 inch thick Plywood (AA marine-grade preferred)
  • Hacksaw
  • Framing square
  • Measuring tape
  • Ballpoint pen or marker
  • Epoxy glue
  • Sliding clamps
  • Self-tapping drywall screws
  • Weights
  • Cleats (3/4 inch-by-3/4 inch)
  • Utility knife
  • 2 inch wide fibreglass tape
  • Fibreglass cloth (optional)
  • Coamings
  • Drill
  • File
  • Sandpaper
  • Spacer cleat
  • Brass Piano hinge
  • Lifting handles (optional)
  • Mild soap
  • Water
  • Dry dish scrubber
  • Cloth
  • Varnish
  • Paint
  • Paint brush

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  1. 1

    Cut the bottom panel out of Plywood for your tool box using a hacksaw. Cut the appropriate size length and width you would like for the tool box to be. Measure the dimensions inside your truck bed and compare with the size of tool box you are wanting to construct.

  2. 2

    Use a framing square and measuring tape to measure the size of Plywood to cut for your tool box sides, front, back and top. Use a ballpoint pen or marker to mark the areas you are going to cut. Cut the sides and top of the box equal length to the bottom. The front and back of the tool box should be cut the appropriate length you want the width of the tool box to be.

  3. 3

    Use epoxy glue to apply to the sides of the box and glue them to the bottom piece. Apply glue on the bottom and sides of the front and back pieces to glue them to the bottom piece and so they glue to the side pieces. You can use sliding clamps, self-tapping drywall screws or weights to help hold the wood pieces secure while they dry. Allow them to dry overnight.

  4. 4

    Glue cleats that are 3/4 inch by 3/4 inch towards the top of the box equally distanced from each other to give support for the box top.

  5. 5

    Use epoxy glue to glue the top lid of the box on and allow it to sit overnight. Use a utility knife to trim the excess edges of dried epoxy glue around the box corners.

  6. 6

    Use two inch wide fibreglass tape on the corners of the box to secure it. You can use fibreglass cloth to the exterior of the box to make it more tough.

  7. 7

    Use a hacksaw to cut a door hole in the top of the box that is properly proportioned. Use epoxy glue to glue 3/4 inch by 3/4 inch cleats around the hole.

  8. 8

    Use coamings around the circumference of the hole. Coamings are small pieces of wood that will insulate the box. Glue the coamings using epoxy glue. This will help keep water out.

  9. 9

    Cut a door out of Plywood using a hacksaw. Use a drill to make starter hole. Keep an inch of the door overhanging on the door coamings.

  10. 10

    Use epoxy glue to glue the door edges to the box. Verify that you leave 1/16 of an inch around the door so that it will not rub against the box when opened. Use a file to round the edges of the door lid. Afterwards you can sand the edges down using sandpaper. Use epoxy glue to seal the outside surfaces of the door.

  11. 11

    Use a spacer cleat and a brass piano hinge to connect the box lid, you can also install any other lifting handles onto the side of the box if needed. You can add internal compartments for your tools or other items.

  12. 12

    Use sandpaper to sand the box and lid down of any rough edges. Remove any excess epoxy glue, fibreglass tape or cloth. Use mild soap and water to wash the box and use a dry dish scrubber to scrub the outside of the box clean. Rinse by wiping down with wet cloths. Allow to dry

  13. 13

    Apply a varnish and paint of desired following varnish and paint product directions.

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