using that blue water pipe stuff

What span are you looking to cover?

I recently bought a load of 25mm pipe for a 5 width (8m span).Needless to say, it's not strong enough. From what little experience I had playing with it, I'd say you're ok to 2.5-3 metre span, but after that it's not rigid enough IMHO.

Was on cheap in Screwfix if anyones after it. 50m for £29.99

HTH

S