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  1. #1
    Join Date
    Mar 2005
    Location
    Melbourne
    Posts
    135

    Default Engineered Floor Joists

    I would appreciate some feedback on the relative merits of the various types of engineered floor joists that are available for upper story construction. I will be spanning 8 metres with a load bearing wall at 4 metres.

    It seems that the major difference is the construction of the web. Some are made from ply, some from stuff that looks like chipboard and there are various metal configurations.

    I suspect the metal ones are better for the installation of between floor services but I am inclined to regard stiffness as the most important criteria.

    Thanks.

  2. #2
    Join Date
    Jan 2005
    Location
    Sydney
    Posts
    191

    Default

    Here goes, but if I miss any or any one else feels that what I have said is incorrect please post away. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>

    <o></o>

    <o></o>

    - Posi-Strut, timber chords with steel “v” shaped chords. Good spans, lots of space for running services.<o></o>

    - Hyspan; Solid LVL sections available in thickness from 36mm to 65mm. <o></o>

    - Hybeam; “i” beams with plywood chords (top / bottom) and plywood web (center)
    Hyne I Beam Finger Joined MGP15 pine chords and plywood web. (out spans Hybeam and is gives better nailing fixing into the timber rather than the plywood chords.<o></o>


    <o></o>

    For second storey addition, floor joists carrying roof load. Continues span. 4mt max span. Hybeam HJ240 should do it BUT check with engineer / manufacture<o></o>

    <o></o>

  3. #3
    Join Date
    Aug 2003
    Location
    .
    Posts
    4,816

    Default

    Quote Originally Posted by Metung
    I will be spanning 8 metres with a load bearing wall at 4 metres.
    I hope there is something underneath to carry the load at 4M??

    Al :eek:

  4. #4
    Join Date
    Nov 2004
    Location
    Port Pirie SA
    Age
    52
    Posts
    0

    Default

    Quote Originally Posted by ozwinner
    I hope there is something underneath to carry the load at 4M??

    Al :eek:
    Unless of course you're using a 250/10mm steel H beam!
    ....................................................................

  5. #5
    Join Date
    Jan 2004
    Location
    Kilmore, near Melbourne, Australia
    Age
    66
    Posts
    781

    Default

    I regard engineered floor joists, LVL's etc as a "why-the-hell-havent-we-been-using-thempfor-years kind of thing. They were invented in the 50's (in Sweden I think) and display superior properties compared to their competitors. Anyway, spec sheets abound from the manufacturers that should put any concerns to rest - as youre in Melbourne, give Archi-Centre a ring and the will load you down with all the answers you need.
    Steve
    Kilmore (Melbourne-ish)
    Australia

    ....catchy phrase here

  6. #6
    Join Date
    Jan 2004
    Location
    Kilmore, near Melbourne, Australia
    Age
    66
    Posts
    781

    Default

    I regard engineered floor joists, LVL's etc as a "why-the-hell-havent-we-been-using-thempfor-years kind of thing. They were invented in the 50's (in Sweden I think) and display superior properties compared to their competitors. Anyway, spec sheets abound from the manufacturers that should put any concerns to rest - as youre in Melbourne, give Archi-Centre a ring and they will load you down with all the answers you need.
    Steve
    Kilmore (Melbourne-ish)
    Australia

    ....catchy phrase here

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