In the above drawing (sling angle of 45°): 1000 ÷ 2 = 500 (Load Per Leg if a vertical lift) 500 x 1.414 = 707 lbs. – ACTUAL LOAD on each leg at the 60° included angle being used. Thus, in the above drawing (sling angle at 60°): 1000 ÷ 2 = 500 (Load Per Leg if a vertical lift) 500 x 1.154 = 577 lbs. THE ACTUAL LOAD MUST NOT EXCEED THE RATED SLING CAPACITY. Then MULTIPLY the load per leg (as computed above) by the Load Factor for the leg angle being used (from the table at the bottom) – to compute the ACTUAL LOAD on each leg for this lift and angle.Determine the angle between the legs of the sling and the horizontal.This provides the load per leg if the lift were being made with all legs being vertically. First, divide the total load to be lifted by the number of legs to be used.Proceed as follows to calculate this load-and determine the rated capacity required of the sling, or slings, needed for a lift. The effect is the same whether a single sling is used as a basket or two slings are used with each in a straight pull, as with a 2-legged bridle.Īnytime pull is exerted at an angle on a leg-or legs-of a sling, the load per leg can be determined by using the data in the table above.

It is also dangerous to use only one choker hitch to lift a load which might shift or slide out of the choke.īASKET hitches distribute a load equally between the two legs of a sling … within limitations described above.Ĭalculating the Load on Each Leg of a SlingĪs the included angle between the legs of a sling decreases, the load on each leg increases. When a choke is used at an angle of less than 120 degrees (see next page), the sling-rated capacity must be adjusted downward.Ī choker hitch should be pulled tight before a lift is made - NOT PULLED DOWN DURING THE LIFT.

The diameter of the bend where the sling contacts the load should keep the point of choke against the sling BODY - never against a splice or the base of the eye.

A choker is used when the load will not be seriously damaged by the sling body - or the sling damaged by the load, and when the lift requires the sling to snug up against the load. When two or more slings are attached to the same lifting hook, the total hitch becomes, in effect, a lifting bridle, and the load is distributed equally among the individual slings.ĬHOKER hitches reduce lifting capability of a sling since this method of rigging affects ability of the wire rope components to adjust during the lift. A tagline should be used to prevent load rotation, which may damage a sling. Full rated lifting capacity of the sling may be utilized, but must not be exceeded. VERTICAL, or straight, attachment is simply using a sling to connect a lifting hook to a load. Description General Information-Wire Rope Slings Every Lift Uses 1 of 3 Basic Hitches

Rigging sling chart