What span tables for irregular shaped deck?

[DavidGriffin]

I need span tables for an irregular shaped deck longest side being 4500ml. My timber supplier sells 140×45 or 190×45.

[MitchellMc]

Welcome to the Bunnings Workshop community @DavidGriffin. It's great to have you join us and many thanks for your questions on span tables.

Your timber supplier should be able to provide span tables for the exact type and grade of timber they’re selling, since the allowable spans depend heavily on whether it’s hardwood or treated pine, and on its grading (for example, MGP10 or F7). If you can let us know those details, we can check our supplier span tables and give you some ballpark figures. As a rough guide, if it's treated Pine MGP10, 140 × 45 could have a max span of around 3000mm, while 190 × 45 would be around 3900mm, but the precise spacing really depends on the timber grade and the way your deck will be constructed. The spans then reduce depending on how wide the deck is, as referenced with the "Floor load width" section.

If you can share a plan of what you’re building, we can also suggest practical post positions to suit your layout.

I've included a span table below for your reference.

Please let me know if you have any questions.

Mitchell

[DavidGriffin]

Dear Mitchell

Thanks for your response. How do I send you a plan for the deck?

[MitchellMc]

You can upload a copy in picture form in your response message by clicking the camera or landscape icon at the top of the text box.

Alternatively, you can email it through to us at workshop@bunnings.com.au, and I'll upload it for you.

Mitchell