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Bearers for Ground Level Deck

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  1. #1
    Apprentice (new member)
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    Default Bearers for Ground Level Deck

    I have 70X70 treated pine lengths that i'm considering using for bearers for a ground level deck. Can i get away with using them for the bearers and 90X45's for the joists. Or would 70X70 be way too light?

    Any help appreciated.

  2. #2
    Former "lurker"
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    Default

    There's nothing in the span tables (AS 1684) with a bearer that shallow.

    With a close enough spacing (somewhat less than 450), you could probably make it suitable for light usage, but a depth of 90 or greater is advisable. It's then a matter of balancing cost and ease of construction.

    Regards, Adam.

  3. #3
    Apprentice (new member)
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    Thanks Adam!

  4. #4
    Color blind! Dr - 307's Avatar
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    If the 'bearers' were spaced close enough why would there be an issue? It's not traditional / common practice but it would work if that's what you've got to work with.
    Or swap it around and use the 70/70 for joists and 90/45 for bearers.
    All decks should be painted - black white black white black white. After all, it would match everything!

  5. #5
    A Member of the Holy Trinity echnidna's Avatar
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    Its far more practical to use the correct timber for bearers.

    Smaller stuff can't span as far so you have to put more stumps in the ground.
    Regards
    Bob Thomas

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  6. #6
    Color blind! Dr - 307's Avatar
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    That would be my thinking also. Gotta do it proper. Half assed jobs always end up biting you on the backside.
    All decks should be painted - black white black white black white. After all, it would match everything!

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