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Attaching existing rafters to timer beam.

Discussion in 'Building' started by Ashworth1, 4 Apr 2017.

  1. Ashworth1

    Ashworth1

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    I need to attach 4 of my existing rafters to the double piece of timer you can see in the picture below.
    Obviously the existing joists I can attach with a hanger but I need to attach the rafters also. The existing rafters have a layboard on them with some weight coming from them. Any ideas?
     

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  3. ^woody^

    ^woody^

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    100mm hangers. But the beam needs to be moved over
     
  4. noseall

    noseall

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    I'm still not getting why a steel was not positioned directly beneath the wall plate and then the wall plate bolted to the steel. Why the faff with the timber along side? The rafter thrust is down on the existing wall plate.
     
  5. garyo

    garyo

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    I did something similar in a previous house because it was the only way to keep the beam above ceiling level. It was a right faff.
     
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  7. Ashworth1

    Ashworth1

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    Thanks noseall. Garyo obviously had the same issue. I didn't want a drop in the ceiling .
    I'll use 100mm hangers then - and extend/alter the angle slightly of the rafters using 4x2 bolted with 12mm coach bolts? Thant sound about right?
     
  8. garyo

    garyo

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    Shame you have to extend the rafters.. I got away with using the rafters existing seat cuts.

    Your need to think about beam rotation too, depending on how far away from the web your rafters are sat.
     
  9. Ashworth1

    Ashworth1

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    Sorry Garyo I'm a bit confused ? How do you mean beam ratio?
    Did you use the seats of the rafters and cut them to join the beam ?
     
  10. garyo

    garyo

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    For rotation, read restraint. Ensuring a downward thrust and not something that will push it sideways or rotate it. Being in the roof you have fewer easy options for embedding in to walls etc.
     
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