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span tables noob question "2/"

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  1. #1
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    Default span tables noob question "2/"

    Hi all,
    Probably a real dumb question, but what does the "2/" refer to in span tables?


    I half assume that its where two bearers are used? And in these cases, are they placed side by side? For example:



    Attached Thumbnails Attached Thumbnails screenshot.2021-05-04-3-.jpg   spantables.jpg  

  2. #2
    4K Club Member Marc's Avatar
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    Bearers are usually laminated together using nails or screws, to ensure both work together, and to allow a longer beam, staggering the length used. You can do it like in your picture, but you must be sure that the load applies to both bearers and not one joist on one and the next on the other, or you defeat the purpose of the double bearer. The block between them is sort of a half assed solution.
    The fringe benefit of laminating your beams is that you can make a straight beam out of crooked timber most of the time, with little effort and a few F clamps
    Science is never settled,
    it advances one funeral at the time.
    Max Planck

  3. #3
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    Read it as "2 of 140 x 35", for example.

    Also in the AS "vertical nail lamination" (VNL) is explained, which is basically the method Marc mentioned, and is my preferred method. Abide by the nail/screw spacings to do VNL properly

  4. #4
    4K Club Member Marc's Avatar
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    A blast from the past ... I wonder what became of Cuppa? 200 post was the max allowed?
    https://www.renovateforum.com/f76/ve...estion-116595/
    Science is never settled,
    it advances one funeral at the time.
    Max Planck

  5. #5
    Community Moderator phild01's Avatar
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    Quote Originally Posted by Marc View Post
    I wonder what became of Cuppa? 200 post was the max allowed?
    Happily touring in their Tvan, here is their most recent post:
    Cape York – last years plan renewed. – A Nomadic Life (cuppa500.com)

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