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Safety & Security > Safety Initiatives > Driver's Handbook on Cargo Securement - Appendix A: Default WLLs for Inmarked Tiedowns
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Driver's Handbook on Cargo Securement - Appendix A: Default WLLs for Inmarked Tiedowns
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Appendix A: Default WLLs for Inmarked Tiedowns
Working Load Limit
| Size |
Grade 30 proof coil |
Grade 43 High test |
Grade 70 Transport |
Grade 80 Alloy |
Grade 100 Alloy |
| 7 mm (1/4 in) |
580 kg (1300 lb) |
1180 kg (2600 lb) |
1430 kg (3150 lb) |
1570 kg (3500 lb) |
1950 kg (4300 lb) |
| 8 mm (5/16 in) |
860 kg (1900 lb) |
1770 kg (3900 lb) |
2130 kg (4700 lb) |
2000 kg (4500 lb) |
2600 kg (5700 lb) |
| 10 mm (3/8 in) |
1200 kg (2650 lb) |
2450 kg (5400 lb) |
2990 kg (6600 lb) |
3200 kg (7100 lb) |
4000 kg (8600 lb) |
| 11 mm (7/16 in) |
1680 kg (3700 lb) |
3270 kg (7200 lb) |
3970 kg (8750 lb) |
- |
- |
| 13 mm (1/2 in) |
2030 kg (4500 lb) |
4170 kg (9200 lb) |
5130 kg (11300 lb) |
5440 kg (12000 lb) |
6800 kg (15000 lb) |
| 16 mm (5/8 in) |
3130 kg (6900 lb) |
5910 kg (13000 lb) |
7170 kg (15800 lb) |
8200 kg (18100 lb) |
10300 kg (22600 lb) |
| Chain Marks |
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| Example 1 |
3 |
4 |
7 |
8 |
10 |
| Example 2 |
30 |
40 |
70 |
80 |
100 |
| Example 3 |
300 |
400 |
700 |
800 |
1000 |
|
MANILA ROPE |
|
Diameter |
WLL |
|
10 mm (3/8 in) |
90 kg (205 lb.) |
|
11 mm (7/16 in) |
120 kg (265 lb.) |
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13 mm (1/2 in) |
150 kg (315 lb.) |
|
16 mm (5/8 in) |
210 kg (465 lb.) |
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20 mm (3/4 in) |
290 kg (640 lb.) |
|
25 mm (1 in) |
480 kg (1050 lb.) |
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WIRE ROPE (6 x 37, Fiber Core) |
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Diameter |
WLL |
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7 mm (1/4 in) |
640 kg (1400 lb.) |
|
8 mm (5/16 in) |
950 kg (2100 lb.) |
|
10 mm (3/8 in) |
1360 kg (3000 lb.) |
|
11 mm (7/16 in) |
1860 kg (4100 lb.) |
|
13 mm (1/2 in) |
2400 kg (5300 lb.) |
|
16 mm (5/8 in) |
3770 kg (8300 lb.) |
|
20 mm (3/4 in) |
4940 kg (10900 lb.) |
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22 mm (7/8 in) |
7300 kg (16100 lb.) |
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25 mm (1 in) |
9480 kg (20900 lb.) |
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STEEL STRAPPING |
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Width-Thickness Inch |
WLL |
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31.7 x 0.74 (1-1/4 x 0.029) |
540 kg (1190 lb.) |
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31.7 x 0.79 (1-1/4 x 0.031) |
540 kg (1190 lb.) |
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31.7 x 0.89 (1-1/4 x 0.035) |
540 kg (1190 lb.) |
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31.7 x 1.12 (1-1/4 x 0.044) |
770 kg (1690 lb.) |
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31.7 x 1.27 (1-1/4 x 0.050) |
770 kg (1690 lb.) |
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31.7 x 1.5 (1-1/4 x 0.057) |
870 kg (1925 lb.) |
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50.8 x 1.12 (2 x 0.044) |
1200 kg (2650 lb.) |
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50.8 x 1.27 (2 x 0.050) |
1200 kg (2650 lb.) |
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SYNTHETIC WEBBING |
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Width |
WLL |
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45 mm (1-3/4 in) |
790 kg (1750 lb.) |
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50 mm (2 in) |
910 kg (2000 lb.) |
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75 mm (3 in) |
1360 kg (3000 lb.) |
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100 mm (4 in) |
1810 kg (4000 lb.) |
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POLYPROPYLENE FIBER ROPE (3-STRAND AND 8-STRAND CONSTRUCTIONS) |
|
Diameter |
WLL |
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10 mm (3/8 in) |
180 kg (400 lb.) |
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11 mm (7/16 in) |
240 kg (525 lb.) |
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13 mm (1/2 in) |
280 kg (625 lb.) |
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16 mm (5/8 in) |
420 kg (925 lb.) |
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20 mm (3/4 in) |
580 kg (1275 lb.) |
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25 mm (1 in) |
950 kg (2100 lb.) |
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POLYESTER FIBER ROPE (3-STRAND AND 8-STRAND CONSTRUCTIONS) |
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Diameter |
WLL |
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10 mm (3/8 in) |
250 kg (555 lb.) |
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11 mm (7/16 in) |
340 kg (750 lb.) |
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13 mm (1/2 in) |
440 kg (960 lb.) |
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16 mm (5/8 in) |
680 kg (1500 lb.) |
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20 mm (3/4 in) |
850 kg (1880 lb.) |
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25 mm (1 in) |
1500 kg (3300 lb.) |
|
NYLON ROPE |
|
Diameter |
WLL |
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10 mm (3/8 in) |
130 kg (278 lb.) |
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11 mm (7/16 in) |
190 kg (410 lb.) |
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13 mm (1/2 in) |
240 kg (525 lb.) |
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16 mm (5/8 in) |
420 kg (935 lb.) |
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20 mm (3/4 in) |
640 kg (1420 lb.) |
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25 mm (1 in) |
1140 kg (2520 lb.) |
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DOUBLE BRAIDED NYLON ROPE |
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Diameter |
WLL |
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10 mm (3/8 in) |
150 kg (336 lb.) |
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11 mm (7/16 in) |
230 kg (502 lb.) |
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13 mm (1/2 in) |
300 kg (655 lb.) |
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16 mm (5/8 in) |
510 kg (1130 lb.) |
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20 mm (3/4 in) |
830 kg (1840 lb.) |
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25 mm (1 in) |
1470 kg (3250 lb.) |
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