Bill of Materials

  • (3) 2x4s 10 feet long
  • (2) 2x4s 8 feet long
  • (2) 4'x8' x 3/4" Plywood sheets.
  • (2) Bricks
  • (2) 3/8 in x 10 in hex bolts with with washers and nuts
  • (2) 1/4 in x 5 in carriage bolts with with washers and nuts
  • (4) 1/4 in x 3.5 in carriage bolts with washers and nuts

International users. 2x4 (two by four) is a common reference for wooden boards in the US. However, 2x4 is nominal size, the actual measurements are 1.5 in x 3.5 in.

Cutting and drilling the holes

  • Cut (2) 10-feet and (2) 8-feet long boards as illustrated below
  • Use 1/4" drill bit for the holes

All measurements are in inches and referenced from the end of the parts to the center of the hole.

  • Take the uncut 10ft board and drill two 3/8 holes as illustrated below.
  • Drill two more 3/8" holes in the two 79in boards (previously cut and drilled) as illustrated below.

Bolt together the legs

  • Use (2) 1/4in x 5in carriage bolts for joint C
  • Use (4) 1/4in x 3.5in carriage bolts for joint A & B

Final frame assembly

  • Bolt the top beam to the legs using two 3/8 x 10in hex bolts.
  • Use 4 wood screws to fix the spoil board to the frame.