Pergola Roof Spans

[jos2446]

Hello,

I am building a pergola over a deck that is 6m x 5.6m. The main problem I have is that the middle beam has to cover an extra 1.2m on top of the 6m length so I can attach it to the main facia on the house. I am not sure what the minimum size of either timber or metal is that I can use to cover that length. I do not want to put a support post in the middle of the deck, so I need to be able to span the 7.2m. There will only be a lightweight bamboo matting that will serve as a roof or covering to filter the sun on top of 100mm x 35mm battens. Down each side there will be posts so the beams I use on the side, length will not be an issue, just the middle section. I suppose metal will be cheaper than timber.
Any advise would be greatly appreciated.

[Barry_White]

Hi Jos

If you go to this page and go down to the bottom and download the spanning tables you will find a solution here. You may need to put some rafters in. If you want some help let me know.

http://www.bluescopesteel.com.au/go/...t-firmlok-beam

[jos2446]

Thanks Bazza, just getting it all together now to put into council as a owner builder project, thanks for the help.

Jason

[AndrewPatrol]

Just a thought - what about a clad pozi-beam??

[jos2446]

Thanks for the info, back on track with my project after being laid up for a while with an injury. Will　post results in the future.

Cheers every one.