Replacing timber bracing on attic trusses with straps ??

Discussion in 'Building Regulations and Planning Permission' started by chaletstyle, 5 Feb 2018.

  1. chaletstyle

    chaletstyle

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    We want to maintain maximum ceiling height for bedrooms in roof space and need to insulate under rafters.

    If we could get rid of diagonal bracing members measuring 25x100x1000, could we replace these with heavy duty steel straps 5mm thick x 30mm x various lengths.

    It would make it much easier to fit insulated plasterboard under the eaves without these great lumbs of wood everywhere.

    We are currently in discussion with BCO about this.

    Strength wise, would one strap be equivalent to one brace member? Any thoughts?
    Thanks.
     
  2. bobsuerita

    bobsuerita

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    i wouldnt advise it if the bracing is on back of uprights and rafters in eaves this is for stability so unless you have ply on the sceling (sloping section) of the roof i would not touch
    attic truss have minimal bracing at the best
    if you havnt got ply which it should you could insulate between trusses then ply and insulate over ply you could then change bracing to eaves
    just dont go ripping bracing out

    also if you insulate between and over uprights no need to insulate in the eaves other than the cieling
     
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  4. ^woody^

    ^woody^

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    The requirement is a 100mm timber and two nails. That's what all the truss makers specify and the BS standards state. If you want anything different you would normally be expected to get an engineer to calculate it or the truss maker to specify.
     
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  5. John D v2.0

    John D v2.0

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    Timber has strength in tension and compression. A strap has strength in tension only.
    You would need to back up the straps with A timber nogging to stop it being able to flex.
     
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  7. chaletstyle

    chaletstyle

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    Thanks for all replies. I think we will probably stick with the timber bracing
     
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