Figure 13-37.Determination of single-basket hitch sling
capacity.
the sling legs are not of equal length, use the smallest
H/L measurement. This formula is for a two-leg bridle
hitch, but it is strongly recommended that it also be used
for the three- and four-leg hitches.
NOTE: Do NOT forget it is wrong to assume that a
three- or four-leg hitch can safely lift a load equal to the
safe load on one leg multiplied by the number of legs.
Other formulas are as follows:
Single-basket hitch (fig. 13-37): For vertical legs,
SWL = SWL (of single-vertical hitch) x 2.
For inclined legs, SWL = SWL (of single-vertical
hitch) x H divided by L x 4.
Double-basket hitch (fig. 13-38): For vertical legs,
SWL = SWL (of single-vertical hitch) x 4.
For inclined legs, SWL = SWL (of single-vertical
hitch) x H divided by L x 4.
Single-choker hitch (fig. 13-39): For sling angles
of 45 degrees or more, SWL = SWL (of
single-vertical hitch) x 3/4 or .75.
Sling angles of less than 45 degrees are not
recommended; however, if they are used,
the formula is SWL = SWL (of single-vertical
hitch) x A/B.
Figure 13-38.-Determination of double-basket hitch sling capacity.
13-20