Pergola spans

[cabbo3]

Hi all just wondering where to get an accurate span table for a pergola ive come across a few on the net which most were all different.
The main thing i wanted to know was for the rafters coming off the house to the beam the single span is 4.2m if i space the rafters 900 apart could i get away with using 140x45 treated pine or would i have to use 190x45 ?
Thanks.

[snowyskiesau]

Get the book by Alan Staines:

The Australian Decks and Pergolas Construction Manual. ISBN 9781875217106

You can probably get this at Bunnings.

[Damo72]

Get the book by Alan Staines:

The Australian Decks and Pergolas Construction Manual. ISBN 9781875217106

You can probably get this at Bunnings.

Never seen it at Bunnings but can vouch for it's usefulness. I got my copy from somewhere on the net ~$25 but I may have got a discount for buying a couple of his others at the same time.

From my reading of table 21 in the above book (note i can't read real well) you would need 170x45 for mgp10 pine.

[cabbo3]

ok thanx for that il have to track down that book , 1 more thing if im using 190 x 45 beam at 2.6m continuos span would i have to space my rafters 900 apart or could i go for 1200 apart ?? il be using a colorbond rofing.

[TermiMonster]

Some span tables (pdf format) were recently posted on the renovate forums, sister site to this.
You may find what you need there. (I think there is a link in the left column of this site.
TM