by thedoctor »
Thu Jun 21, 2007 9:14 am
You need 4 pieces of timber 150mm deep and 25mm thick to create a form, or mold, for the concrete. Fix a 50 x 50mm timber to the back of them, horizontally, to geive the boards strength and stop them bowing. Then fix them together, on the ground where you are placing the base and put the concrete in the middle. See our mixing concrete project for help with this.