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Thread: Advise on bearers and Joists
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18th September 2007, 02:00 PM #16
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so what would the maximum span be for the posts be using two 90 x 45 for bearers?
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18th September 2007, 02:17 PM #17
My span tables don't show 90x90 but a 90x70 in F5 will span up to 1200 or 1500 in F8.
"I don't practice what I preach because I'm not the kind of person I'm preaching to."
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18th September 2007, 02:18 PM #18
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1500mm max between posts using two 90 x 45's (or 90 x 90 ) and 1500mm for the joists ( 90 x 45). This is max though and although will do the job and is legal it will have a little spring in it . Better th bring them all in a little if you can.
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18th September 2007, 04:19 PM #19
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I had a look at the tables I have and don't show 90x90 in F5.
Bearer span also takes into account the joist span. Longer joist span = less bearer span, as each bearer is now supporting more floor.
Try this for a program for workiong out spans
https://www.woodworkforums.com/showthread.php?t=55014
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18th September 2007, 04:24 PM #20
Yes, the spans I gave were for a bearer spacing of 1800, but given the tight space between the pool and the retaining wall, he's not likely to exceed that. Possibly on the downhill side though - however I'd suggest a much deeper bearer for that portion of the deck.
"I don't practice what I preach because I'm not the kind of person I'm preaching to."
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