1. #1
    Forum Member

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    Jan 2003
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    Default Intermediate Roof Construction...

    Question: what is "composite" roof decking? I've seen it listed over steel bar joists. Any ideas?

  2. #2
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    From a structural standpoint, "composite" means that the deck or floor system is tied together with the joists or beams and acts with the beam to carry load. Composite systems will use a concrete deck with studs welded to the top side of the beam embedded into the deck. The advantage this gives you for design is that you can use smaller beams or joists to support the same load than with a non-composite system. If the deck is damaged, however, the strength of the beam is compromised.

    You might see the term "composite" applied to some roofing systems made up of several different types of material or recycled materials but it isn't the same thing.
    Thomas Anthony, PE
    Structures Specialist PA-TF1 & PA-ST1
    Paramedic / Rescue Tech North Huntington Twp EMS
    The artist formerly known as Captain 10-2

    No, I am not a water rescue technician, but I stayed in a Holiday Inn Express last night.

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