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Thread: size of boards to use
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23rd April 2008, 09:38 PM #1Intermediate Member
- Join Date
- Jun 2007
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- Melbourne
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size of boards to use
I am planning to build a deck
5.5m wide X 4.5 m long
what size bearrers and joists should you use
thank you
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23rd April 2008, 11:26 PM #2
Both depend on spans and spacing.
Mick"If you need a machine today and don't buy it,
tomorrow you will have paid for it and not have it."
- Henry Ford 1938
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24th April 2008, 08:57 AM #3
Not to mention the stress grade of the timber. I suggest that you get a hold of some span tables. Even better, get your hands on a copy of Alan Staines’ book Deck and Pergola Construction Manual. It has the span tables as well as a stack of other useful info. If you are planning on using F5 treated pine for the bearers and joists, here's the link to the tables.
The first step towards knowledge is to know that we are ignorant.
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24th April 2008, 10:04 PM #4Intermediate Member
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- Jun 2007
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- Melbourne
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25th April 2008, 03:29 PM #5
Space your bearers further apart and use 6x2 pine joists cause at 1500 you will need 4x2 hwd as pine only goes 1300 continuos span
6x2 pine will go 2800 continuos although it will bounce at that distance
joists 450 centres as this is all deck will span unless using 140 x 22 hwd boards
bearers come down to a trade off between digging and timber size .. if you like to dig use a small bearer and dig plenty of holes if you hate digging like me use a big bearer and less holes
cheers utemad
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