SLING CONSIDERATIONS - EDGE RADIUS REDUCTION
ALLOY CHAIN SLINGS
Edge radius reduction is used when an alloy chain sling is rigged over an edge. To calculate this loss, multiply the chain sling capacity by the reduction factor found in the table below.
d (CHAIN SIZE)
R
             Edge Radius
R > 2 x Chain d
R > Chain d
R < Chain d
Reduction Factor
1.0
0.7
0.5
 SLING CONSIDERATIONS - D/d
ALLOY CHAIN SLINGS
   When using chain slings in basket applications where the D/d is less than 6, the rated capacities must be reduced by the values given in the table. Do not use a chain sling with a D/d that is less than two.
D/d CHAIN BASKET SLING DE-RATING FACTORS
  D/d Ratio
% Rated Capacity
Less Than 2
Not Recommended
2
60
3
70
4
80
5
90
6 and above
100
d 1/2"
D
2"
   Example:
When the diameter of the load is 4 times the diameter of the alloy chain sling the D/d ratio is 4/1 and the sling ef ciency is 80%.
D d
= 2 ÷ .5 = 4
4 1
= 80% ef ciency
  2’’ load diameter (D)
1/2’’ alloy chain sling diameter (d)
 Sharrow Lifting Products
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