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Skew Lift in SACS

thread311-162666

Skew Lift in SACS

Skew Lift in SACS

(OP)
Anyone know how to set up a skew lift (75%-25%, diagonally opposite slings) for a SACS analysis?
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RE: Skew Lift in SACS

Dont know what SACS is, but we do lift analysis using typical frame software.  We model the diagonally opposite  attached to two coincident nodes.  One of these nodes is fixed in three degrees of translation, the second is free to translate in the vertical direction.  A load equal to 25% of the total weight is then applied to the node free to translate in the opposite direction to gravity.  This forces the remaining 75% onto the other slings.

RE: Skew Lift in SACS

Apply a temperture load to the sling member to elongate the sling.  Then check the sling tension loads and iterate the temperature loads as needed to get the sling loads to the desired percentage of gravity load.

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