Table of Contents
- 4About the measurements, Materials you will need and Informative notes
- 5Materials continued and cutting list for the form
- 6The plans - dimensions
- 7The form plans - schematic
- 8Step 1.1 Cutting and assembling the frame pieces of the seat form
- 9Step 1.2 Cutting the plywood, the plastic, and assembling the seat form
- 10Step 1.3 Cutting the form pieces for the legs
- 11Step 1.4 Assembling the forms for the legs
- 12Step 1.5 Aligning and bolting the leg forms to the seat form
- 13Steps 2.1 to 2.3 Cutting, shaping and tying the mesh
- 14Concrete mix information
- 15Steps 3.1 to 3.2 Dry and wet mix
- 16Steps 4.1 to 4.3 Applying the release agent, half filling the seat form and placing the reinforcing
- 17Steps 4.4 to 4.5 Topping up the seat form and attach the leg forms to the seat form
- 18Step 4.6 Topping up the leg forms
- 19Step 4.7 Releasing the leg forms
- 20Step 4.8 Releasing the seat form
- 21Appendage: Easier options
Part 1. Making the form
The form is the mold or the boxing that holds the wet concrete in place until it sets.
Step 1.1 Cutting and assembling the frame pieces of the seat form
The two (c) pieces and the two (d) pieces are of 2″ x 4″ (100mm x 50mm) stock. They can all be cut from one 11ft (3.3m) length.
Before you cut the individual pieces to length, make a 10° angle cut (chamfer, bevel) along one edge of the wood, as shown in the drawing.
This is best done on a bench saw with the blade tilted 10 degrees.
With a certain amount of skill, it can also be done with a circular power saw with its blade tilted 10 degrees.
Then cut the two (c) pieces and the two (d)pieces to the dimensions given in the drawing below.
Note: The drawings below show the wider face of the wood. The beveled edge is the bottom (lower) edge of the pieces in the drawing.