1. #1
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    Default Roof Rafters failing signs?

    I have a paper that I need to write and the teacher is asking for signs of rafters that are starting to fail. I would appreciate some examples of what to look for.
    Thank you in advance

  2. #2
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    Assuming you mean wood rafters:

    Sagging, spongy, springy. Unusual sounds, creaking, snapping or moaning.

    Fire in the roof support area, how much, how intense, how long?

    Cutting the roof: is fire venting as you cut?

    Construction: Are the rafters wall to wall, in masonry or frame or are they supported by a center I-beam.

    If a center beam, is it iron or steel?

    Are the walls out of plumb?

    What type of roof: Flat, peaked?

    If there are parapet walls, are there clean areas of roofing near the edges or fresh gaps? This indicates the roof is pulling inward from the wall

    Whats on the rafters? Felt and shingles, membrane, composite, numerous layers, inverted roof, Q-deck?

    That's the 30 second size up.

  3. #3
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    Also, there is a big difference between rafters and trusses. Do you mean wood rafters?
    Bob Compton
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  4. #4
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    Does your head hit the roof when you stand up?

    Bowing walls? its a good time to leave.
    Psychiatrists state 1 in 4 people has a mental illness.
    Look at three of your friends, if they are ok, your it.

  5. #5
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    A consideration must be made for the amount of time they have been exposed to fire conditions, even in the absence of other signs of failure.
    "We shouldn't be opening firehouses in Baghdad and closing them in New York City."

    IACOJ

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