Posts for raised decking

[Chris171280]

Hi guys

I'm planning a raised decking area on a sloped garden, the back of the deck will be ground height and the front about 400mm off the ground, area is 4000×4800mm.

Looking for opinions on supports, I have some lengths of mild steel channel, 50×100×50mm which is 2.5mm thick, would this be better or just as good as using 100×100mm treated fence posts?

I've got a big tin of hammerite spare that I can paint the channel with for a bit of extra protection!

Cheers

 

[Nige F]

If it's going to be upright and concreted into the ground then the metal will outlast the wood

 

[Chris171280]

Cheers Nige,

So you think the steel will be better, I wasn't sure with it being only 2.5mm thick, I didn't know how long it would take to rust away and snap under the weight!