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  1. 12th November 2007, 02:30 PM #1
    Paul2012
    Paul2012 is offline Intermediate Member
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    Default Joists height restriction

    Hi I'm building a pool deck the posts and bearers are done I'm about to do the joists i had planned to use 90 x 45 but i would like to go higher, could i use a 140 x 45 or would this be too high for a joist.... thanks paul
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  3. 12th November 2007, 02:43 PM #2
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    silentC
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    140x45 is fine. If you went up to 180x45 you would need to block the joists.
    "I don't practice what I preach because I'm not the kind of person I'm preaching to."
  4. 12th November 2007, 06:01 PM #3
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    UteMad
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    F5 treated

    90 x45 single span 1100mm continuos 1300mm

    140 x 45 single span 2300mm continuos 2800mm

    continuous is over 3 or more bearers single is over only 2 supports

    cheers utemad
    www.dialadeck.com.au
  5. 13th November 2007, 08:11 AM #4
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    silentC
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    What he's asking is whether he can increase the height of the joists from 90 to 140. The rule is that if the joist is 4 times the width or more, then the joists must be blocked (braced).
    "I don't practice what I preach because I'm not the kind of person I'm preaching to."
  6. 13th November 2007, 10:45 AM #5
    Paul2012
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    ok thanks im going to post some pictures in a new thread of what i have been doing
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