Sling Safety Information

 

 

Working Load Limits for LacledAlloy Chain

 

Grade 100

Chain Size 
(in.)

Single
90
Double
60
Double
45
Double
30
Tri/Quad
60
Tri/Quad
45
Tri/Quad
30
9/32 4,300 7,400 6,100 4,300 11,200 9,100 6,400
5/16 5,700 9,900 8,100 5,700 14,800 12,100 8,500
3/8 8,800 15,200 12,400 8,800 22,900 18,700 13,200
1/2 15,000 26,000 21,200 15,000 39,000 31,800 22,500
5/8 22,600 39,100 32,000 22,600 58,700 47,900 33,900

 

Grade 80

Chain Size 
(in.)

Single
90
Double
60
Double
45
Double
30
Tri/Quad
60
Tri/Quad
45
Tri/Quad
30
9/32 3,500 6,100 4,900 3,500 9,100 7,400 5,200
5/16 4,500 7,800 6,400 4,500 11,700 9,500 6,800
3/8 7,100 12,300 10,000 7,100 18,400 15,100 10,600
1/2 12,000 20,800 17,000 12,000 31,200 25,500 18,000
5/8 18,100 31,300 25,600 18,100 47,000 38,400 27,100
3/4 28,300 49,000 40,000 28,300 73,500 60,000 42,400
7/8 34,200 59,200 48,400 34,200 88,900 72,500 51,300
1 47,700 82,600 67,400 47,700 123,900 101,200 71,500

 

ASTM Proof Load Requirements

Grade 100

Chain Size 
(in.)

Working
Load Limit
Single Leg
Proof Test
Double Leg
Proof Test
Triple/Quad 
Leg Proof
Test
9/32 4,300 8,600 17,200 25,800
5/16 5,700 11,400 22,800 34,200
3/8 8,800 17,600 35,200 52,800
1/2 1,500 30,000 60,000 90,000
5/8 22,600 45,200 90,400 135,600
3/4 35,300 70,600 141,200 211,800
7/8 42,700 85,400 170,800 256,200

 

Grade 80

Chain Size 
(in.)

Working
Load Limit
Single Leg
Proof Test
Double Leg
Proof Test
Triple/Quad 
Leg Proof
Test
9/32 3,500 7,000 14,000 21,000
5/16 4,500 9,000 18,000 27,000
3/8 7,100 14,200 28,400 42,600
1/2 12,000 24,000 48,000 72,000
5/8 18,100 36,200 72,400 108,600
3/4 28,300 56,600 113,200 169,800
7/8 34,200 68,400 136,800 205,200

 

Effect of Elevated Temperature on the Working Load Limit

Temperature Grade of Chain
Grade 100 Grade 80
(°F) Reduction of 
Working Load Limit
WHILE AT
Temperature
Reduction of
Working Load Limit
AFTER
EXPOSURE

Temperature
Reduction of
Working Load Limit
WHILE AT
Temperature
Reduction of
Working Load Limit
AFTER
EXPOSURE

Temperature
Below 400 None None None None
400 15% None 10% None
500 25% 5% 15% None
600 30% 15% 20% 5%
700 40% 20% 30% 10%
800 50% 25% 40% 15%
900 60% 30% 50% 20%
1000 70% 35% 60% 25%
Over 1000 OSHA 1910.184 requires all slings exposed to temperature over 1000°F to be
removed from service

 

Chain Wear Chart for Grade 100 & 80

Trade
Size 
(in.)

Normal
Material
Diameter
(in.)
Minimum
Allowable
Thickness
on Link
(in.)
9/32 0.276 0.239
5/16 0.312 0.273
3/8 0.394 0.342
1/2 0.512 0.443
5/8 0.630 0.546
3/4 0.787 0.687
7/8 0.866 0.750
1 1.020 0.887
 

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