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  1. #1
    Join Date
    Nov 2009
    Location
    Brisbane
    Posts
    5

    Default decking screw length?

    Hi

    I would like to know what length screw would be best to secure 19mm thick merbau decking board to treated pine joists? Should i get screws with a shank length equal to the decking board thickness ( ie. 19mm)

    Thanks in advance.

  2. #2
    Join Date
    Aug 2006
    Location
    Melbourne
    Age
    43
    Posts
    978

    Default

    The recommendations I've read suggest 65mm, but I've use 50mm screws on mine (2,000 of them) without any issues. On a coupl of occasions I did hit a knot or void in the joints and replaced the screw with a 75mm, but I could count those on my hands.
    "Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
    - Douglas Adams

  3. #3
    Join Date
    May 2008
    Location
    Hervey Bay QLD
    Posts
    319

    Default

    on treated pine i would use 45-50mm more than enough
    regards chowcini

  4. #4
    Join Date
    Nov 2009
    Location
    Brisbane
    Posts
    5

    Default

    Thank you all for your responses.

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