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Joining roof joists

Discussion in 'Roofing and Guttering' started by dabomb3k, 8 Jul 2018.

  1. dabomb3k

    dabomb3k

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    hi guys I’m after some advice

    If I HAD to join two length of roof joists together <flat roof, just for a garage> (I know not ideal either way)

    Which of the two ways below would you do it (or do you have a 3rd)

    13C31668-78E2-455D-9B3E-569292277D3C.jpeg

    Apologies for poor photo, Would you push the two length together then use metal brackets (or timber offcuts) to hold them together

    Or would You overlap by approx 1m and then bolt through,

    They aren’t holding any significant weight long term just Osb board and EPDM
     
    Last edited: 8 Jul 2018
  2. blup

    blup

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    One recognised method for joining two pieces of timber in the your option 1 is to "sister" them, that is with timber either side of the pieces to be joined, bolted through and using timber connectors.

    Probably cheaper quicker and wiser to get a single length of timber of sufficient dimensions and grading to take the load.

    Blup
     
  3. bobsuerita

    bobsuerita

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    how wide is the garage
    both will end in tears plus gang nailed timber is done by a press
     
  4. JobAndKnock

    JobAndKnock

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    Overlap, coach bolt using mudguard washers on the outside and star washers between the sistered parts. Don't go too near to the ends with the bolts
     
  5. ^woody^

    ^woody^

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    Joining timber for what, a 3m wide garage? o_O

    You could use 500mm spice plates, but that would cost more that twice as much as a 3m joist.

    If you don't want it falling on your car .....
    foto_no_exif (3).jpg
     
  6. DIYnot Local

    DIYnot Local

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