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Timber framed house attic conversion question

  • 27-07-2009 1:26pm
    #1
    emmbaasee
    Registered Users, Registered Users 2 Posts: 100 ✭✭


    Hi guys.

    I am looking for some some advice on how a builder would go about putting in structural steel support for a suspended floor in an attic conversion.
    The house itself is a 3 bed semi-detatched timber framed house.
    The roof is a truss roof with 2 hips.
    The external walls are block with a pebble dash finish
    The party wall is 4x2 timber frame construction which is independant from my adjoining neighbour who also has a 4x2 stud wall which is built next to mine.The 2 walls are are held to each other with metal ties only. They are insulated and plasterboarded with a skim finish.
    My question is how would structural steel or structural timber be supported ?
    Can the steel or timber be placed directly on to the stud work between the neighbours house and my own ?
    Im guessing this stud work is not strong enough to support the steel with a suspended floor built into it.Also the weight of the roof would be transferred directly onto the steel via purlins with a stud built directly underneath.
    How can this problem be resolved ?
    Can the steel work be placed on the block work that makes up the external skin of the house

    Any advice on this matter would be greatly appreciated !!


Comments

  • #2
    sinnerboy
    Closed Accounts Posts: 5,433 ✭✭✭sinnerboy


    The likely resolution is that the "knee walls" - those that separate the converted attic from the non converted attic - would be made from load bearing timber which may be lined with plywood before plasterboard

    Supporting off the external block walls should not be considered - that wall is not intended to be loaded and you will get localised cold bridging

    It is likely that you will need to have inserted steel posts - probably 100 x 100 box sections to take roof loads down from the roof to footings

    If you can obtain them - shop drawings from the TF company would be very useful

    You will need an experienced structural engineer


  • #3
    sydthebeat
    Subscribers Posts: 42,169 ✭✭✭✭sydthebeat


    sinnerboy wrote: »

    You will need an experienced structural engineer

    +1

    i wouldn't dream of going near a timber framed dwelling without the input from a fully INDEMNIFIED structural engineer....


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