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Build Up Internal Walls

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  • 30-07-2014 8:49pm
    #1
    BarneyMc
    Registered Users Posts: 1,504 ✭✭✭


    My joists sit about 4-5 inches higher than my 1st floor internal walls and rest on the external walls only. Under the joists I plan on attaching my airtight membrane and then a 2 inch insulated slab.

    This means the internal walls will be 2-3 inches lower than the slab. What's the best way to build up the walls - 'soapbars'?


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    #2
    4Sticks
    Registered Users Posts: 1,155 ✭✭✭4Sticks


    BarneyMc wrote: »
    My joists sit about 4-5 inches higher than my 1st floor internal walls and rest on the external walls only. Under the joists I plan on attaching my airtight membrane and then a 2 inch insulated slab.

    This means the internal walls will be 2-3 inches lower than the slab. What's the best way to build up the walls - 'soapbars'?

    Make sure your structural engineer is satisfied that the walls have adequate head restraint


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    #3
    BarneyMc
    Registered Users Posts: 1,504 ✭✭✭BarneyMc


    4Sticks wrote: »
    Make sure your structural engineer is satisfied that the walls have adequate head restraint

    What's that?


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    #4
    Johnnyhpipe
    Closed Accounts Posts: 748 ✭✭✭Johnnyhpipe


    BarneyMc wrote: »
    What's that?

    Jasus...


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    #5
    Johnnyhpipe
    Closed Accounts Posts: 748 ✭✭✭Johnnyhpipe


    Johnnyhpipe wrote: »
    Jasus...

    Ok...sorry.. Generally speaking the walls need to be laterally restrained at their head in most cases to provide adequate resistance to internal wind loads/horizontal loads (BS6399) as well as meeting robustness requirements and ensuring an overall durable junction that wont crack the finishes.

    Personally - typically I would be looking for a timber bearer/wallplate adequately fixed/strapped where necessary. But of course this varies from wall to wall and project to project.

    Is this a support point for the designed roof structure? Wind uplift requirements..?


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    #6
    4Sticks
    Registered Users Posts: 1,155 ✭✭✭4Sticks


    Also be satisfied that sound will not transfer too readiliy between rooms seperated by these walls.


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    #7
    BarneyMc
    Registered Users Posts: 1,504 ✭✭✭BarneyMc


    Johnnyhpipe wrote: »
    Ok...sorry.. Generally speaking the walls need to be laterally restrained at their head in most cases to provide adequate resistance to internal wind loads/horizontal loads (BS6399) as well as meeting robustness requirements and ensuring an overall durable junction that wont crack the finishes.

    Personally - typically I would be looking for a timber bearer/wallplate adequately fixed/strapped where necessary. But of course this varies from wall to wall and project to project.

    Is this a support point for the designed roof structure? Wind uplift requirements..?

    Apology accepted, I've 2 degrees but neither in engineering.

    OK, if this really is a structural issue then I'll leave it at that as I know we can't discuss on this forum. I'm talking about the internal (inside walls) on the first floor, none of which have any strapping (unlike the outside/perimeter walls) or support the roof.

    So just to be clear, do these internal walls need to be 'laterally restrained'?


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    #8
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,140 Mod ✭✭✭✭BryanF


    Just to be clear, your eng/arch needs to see this.


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