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  1. 31st August 2013, 04:40 PM #1
    Quang Ha
    Quang Ha is offline New Member
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    Default Posi trusses VS I joists

    Hi,
    Could any one please help me. I am going to build the house for sub floor still unsure to use position trusses or I joist beam. If the deep is 400 mm , span mac is 5600 mm which one is better? I am looking for the strong floor which less bouncing. Thank you so much
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  3. 2nd September 2013, 10:20 AM #2
    Stewie D
    Stewie D is offline Senior Member
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    Default

    Your structural engineer should have this specified in your structural drawings.
    They should both have the same strength therefore much the same deflection under load but one thing that sparkies and plumbers like about the trusses is that you can run the wires or pipes through them without any drilling.
    Just make sure the timber is rated for sub-floor use.

    Stewie
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