Trunnions are small round pieces of fluted wood, which allow invisible assemblies. Through cubes, you can design shelves and storage that are as easy to make as they are practical and attractive.
Make a preliminary plan
First of all, it is essential to make a sketch, very precise and to scale, of your project and to number each tablet. Indeed, the surface of the wall to be dressed will condition the dimensions of the cubes and you will therefore have to adapt the number and dimensions of your cubes ... You can install shelves, create rounding, however, for reasons of strength and deflection , avoid spans longer than 50 cm.
The choice of wood
The easiest way is to use medium, but shelves of glulam pine, melamine or plywood will do the trick. The thickness of the wood is also a function of the dimensions of the project… It should not be too thin or too thick for reasons as much aesthetic as practical. Between 15 and 20 mm seems to be ideal for cubes 30 to 35 cm per side.
The caliber of the journals
It is obviously the thickness of the tablet that determines the diameter of the pin, which must never exceed half of this thickness, i.e. 6 mm diameter pins for 15 mm boards, and 8 mm pins for a thickness of 20 mm.
Step by step
Debit or have all the amounts and crosspieces that make up your shelf debited and numbered.
With a sanding block or an electric sander, soften all the edges of the different elements.
With the help of a meter and a spirit level, trace on all the crosspieces, with a perfectly sharpened pencil, the location of the uprights and their thickness.
On the crossbar, mark the drilling points and partially drive a point at this location.
With pliers, cut the tip to leave only 5 to 8 mm beyond the surface of the wood.
Position the upright, then with a sharp blow of a mallet, penetrate the points in the wood ... Your marks will be perfect.
Carefully remove the upright and the rest of the points and drill the upright and the crosspiece which must correspond to one and a half times the diameter of the journal plus 1 mm (10 mm for a 6 mm journal and 13 for one of 8) .