Designing a Lifting Sling Designing a Lifting Sling

To aid in the design of a lifting sling, MOSES has a special command:


     SLING_DESIGN, *NOD(1), ..., *NOD(4), BEGHEI, MAXHEI, NUM

When this command is issued, MOSES will take the body to which the nodes are connected in the initial configuration and compute the lengths of each element of the sling so that the hook point is above the center of gravity. This computation is made for a hook height beginning at BEGHEI for NUM heights (feet or meters), measured from the highest sling attachment point until the height exceeds MAXHEI. At each height step, the tensions in each sling element are estimated so that the hook load equals the body weight. The height step increment is calculated as (BEGHEI-MAXHEI)/(NUM-1).

At the conclusion of the computation, the user is placed in the Disposition Menu where he may dispose of the results as he sees fit.