16th January 2009, 12:00 PM
It's easy-peasy, just stick one of the 90 degree fittings on the end of the pipe and then stick another length of pipe in the other side. Measure out 1m from the edge of the pipe and cut off with a junior hacksaw. Stick 90 degree fitting on and continue until you have a 1m square. I find it easier to just tie off the 20cm divisions rather than drill the pipe. The only disadvantage is that you can't pull the strings really tight as it will distort the size of the 1m square. Apart from that, it's a quick way to get you out of the **** if you need a planning frame and nowt else is available.