Poured Concrete Raised Garden Beds – Precast Form Build PART 2

Make the ENDS

animation of parts for the concrete raised garden beds forms
End assemblies for the Concrete Form

To make the ends, I cut a length of 2×6 for the three pieces that make up the end assembly. These are ripped on the table saw to width then back to the mitre saw to cut down for each component.

2x4 end parts cut on a miter saw
The End components are first ripped to width then cut down on the miter saw

One of these blocks I take to the drill press for the dowel hole.

drill press
One of the End blocks is drilled for the peg dowel and assembly holes drilled with a 1/8″ bit

I’ll then drill the pilot holes for assembly with an eighth bit.

cutting wooden dowel on a saw
The dowels for the pegs need to have their diameter reduced a bit so the plastic pipes fit over easily

The dowels need to be sanded down to reduce their diameter to fit inside the pipes. I use a disc sander for this. You could also use a small hobby sander or a belt sander instead.

gluing a wooden dowel in the end assembly
Dowels are cut to length and glued applied. Then tapped into the holes in the Ends and Sides

These are then cut to length and glued and tapped into the holes.

assembling the end parts of the form
The End components are glued and screwed together

I assemble the ends with glue and screws checking that everything lines up well and is square.

assembling the end parts of the form
Quick clamps are just awesome

A clamp helps to hold the pieces while I run in the screws.

Test Fit and Assembly

With all the parts of the form ready, I assemble it and test the fit.

final assembly of the mould
Assemble the form now that the main parts are made

I number each form and all the parts so I can reassemble it again the same way.

labelling the form parts
If everything fits well then label the main parts with a Sharpie
assemble the forms to cast concrete raised garden beds
Self drilling cabinet screws are a good option

I used particle board screws for this but there’s some self drilling cabinet screws, for a few more dollars, that would save time and pre-drilling.

I used some wood filler to fill screw holes
A bit of wood filler used on some screw heads and knot holes

I filled any knot holes or screw heads with a bit of wood filler. Some of the insets had holes predrilled from the other plywood forms. They were the right size so I attached them with screws from the top.
No worries. Wood filler filled the screw heads and only took a minute to apply.

Apply Finish

I remove the screws and disassemble the form and apply two coats of Food Grade Mineral Oil.

use mineral oil to coat the concrete forms
Butchers Block oil

This oil is sold as Butcher’s Block or Cutting Board oil. You can also buy it in Feed Stores for about half the price.
I liberally apply it with a cloth. It doesn’t take long and each coat took about 10 minutes per form.

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