| Chain Grade | Size | Working Load Limit | Minimum number of chains required to secure loads in forward direction by weight of the article in lbs. | |||||||||
| in. | lbs. | 5,000 | 10,000 | 15,000 | 20,000 | 25,000 | 30,000 | 35,000 | 40,000 | 45,000 | 50,000 | |
| Grade 30 Proof Coil | 5/16 | 1,900 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 | 22 |
| 3/8 | 2,650 | 2 | 4 | 5 | 7 | 8 | 10 | 11 | 13 | 14 | 16 | |
| Grade 43 High Test | 5/16 | 3,900 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 3/8 | 5,400 | 1 | 2 | 3 | 3 | 4 | 5 | 6 | 6 | 7 | 8 | |
| Grade 70 Transport | 1/4 | 3,150 | 2 | 3 | 4 | 6 | 7 | 8 | 9 | 11 | 12 | 13 |
| 5/16 | 4,700 | 1 | 2 | 3 | 4 | 5 | 6 | 6 | 7 | 8 | 9 | |
| 3/8 | 6,600 | 1 | 2 | 2 | 3 | 4 | 4 | 5 | 5 | 6 | 7 | |
| Grade 80 Alloy | 7/32 | 2,100 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 |
| 9/32 | 3,500 | 2 | 3 | 4 | 5 | 6 | 7 | 9 | 10 | 11 | 12 | |
| 5/16 | 4,500 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| 3/8 | 7,100 | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 6 | 6 | |
| Grade 100 Alloy | 3/8 | 8,800 | 1 | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 5 |
