18.5.3 Effective Working Length
The effective working length (EWL) must be considered. This is measured between the bearing surface of the upper and lower terminals or, in the case of an endless sling, with the sling pulled flat, as shown in the following illustrations:
Figure 18.5.3-1 Effective working length of a single leg sling
Figure 18.5.3-2 Effective working length of an endless sling
Figure 18.5.3-3 Effective working length of a multi-leg sling