Crane collapse in Austin, TX - Page 2
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  1. #21
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    Feb 2004
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    peekskill, NY
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    Quote Originally Posted by Cole2534 View Post
    Agreed. It was a tilt-wall panel they were erecting, so I imagine that spreader has sheaves on it to allow the panel to rotate up.
    Don't think this was the case.

    There were 8 attachment points to the slab, and they were all fixed to the spreader without any sheaves or chance to
    equalize the load on them as the slab tilted up.

    This is why one of the uppermost attachment points failed, it was taking all the load once the slab was near to 90 degrees.
    This was a rigging error I believe. Two of those cables, shackles, and re-bar links could not be expected to hold the entire
    thing up, when vertical.

  2. #22
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    Apr 2010
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    Justin, Texas
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    The upper bridles ride on a set of sheaves as do the lowers. The pick points are installed so that the wall will naturally tilt vertical as it's lifted. The cable itself failed at the uppermost right side attach area according to the info released so far.

    Been watching some warehouses with bigger panels go up on my daily commute. Almost every job I've been by, is using cranes with 100-150' booms to minimize moving the cranes between section picks.


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