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Driver's Handbook on Cargo Securement - Appendix A: Default WLLs for Unmarked Tiedowns

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

Review Questions - Click On The Picture To Begin...

Given that general cargo securement requires a WLL of at least 50% of cargo weight, how many 11mm wire rope tiedowns would be required for a load of 26,000 lbs?
  • 2
  • 3
  • 4
  • 1

Quote From The CDL Manual:

WIRE ROPE (6 x 37, Fiber Core)
  • Diameter:
  • 7 mm (1/4 in)
  • 8 mm (5/16 in)
  • 10 mm (3/8 in)
  • 11 mm(7/16in)
  • 13 mm (1/2 in)
  • 16 mm (5/8 in)
  • 20 mm (3/4 in)
  • 22 mm (7/8 in)
  • 25 mm (1 in)
  • WLL:
  • 640 kg (1400 lb.)
  • 950 kg (2100 lb.)
  • 1360 kg (3000 lb.)
  • 1860 kg (4100 lb.)
  • 2400 kg (5300 lb.)
  • 3770 kg (8300 lb.)
  • 4940 kg(10900 lb.)
  • 7300 kg(16100 lb.)
  • 9480 kg(20900 lb.)
Next
What is the WLL of a 1/2-inch Grade 70 tiedown?
  • 11,300 lbs
  • None of these
  • 5,130 lbs
  • 9,200 lbs

Quote From The CDL Manual:

Size (in diameter):
  • 7 mm (1/4 in):
  • 8 mm (5/16 in):
  • 10 mm (3/8 in):
  • 11 mm (7/16 in):
  • 13 mm (1/2 in):
  • 16 mm (5/8 in):
  • Chain Marks -
  • Example 1:
  • Example 2:
  • Example 3:
Grade 70 Transport:
  • 1430 kg (3150 lb)
  • 2130 kg (4700 lb)
  • 2990 kg (6600 lb)
  • 3970 kg (8750 lb)
  • 5130 kg (11300 lb)
  • 7170 kg (15800 lb)
  • Chain Marks -
  • 7
  • 70
  • 700
Prev
Next
What is the total WLL of two 20mm nylon ropes and one 5/8-inch wire rope?
  • 11,140 lbs
  • 6,820 lbs
  • 2,920 lbs
  • 1,960 lbs

Quote From The CDL Manual:

WIRE ROPE (6 x 37, Fiber Core)
  • Diameter:
  • 7 mm (1/4 in)
  • 8 mm (5/16 in)
  • 10 mm (3/8 in)
  • 11 mm(7/16in)
  • 13 mm (1/2 in)
  • 16 mm (5/8 in)
  • 20 mm (3/4 in)
  • 22 mm (7/8 in)
  • 25 mm (1 in)
  • WLL:
  • 640 kg (1400 lb.)
  • 950 kg (2100 lb.)
  • 1360 kg (3000 lb.)
  • 1860 kg (4100 lb.)
  • 2400 kg (5300 lb.)
  • 3770 kg (8300 lb.)
  • 4940 kg(10900 lb.)
  • 7300 kg(16100 lb.)
  • 9480 kg(20900 lb.)
NYLON ROPE
  • Diameter:
  • 10 mm (3/8 in)
  • 11 mm (7/16 in)
  • 13 mm (1/2 in)
  • 16 mm (5/8 in)
  • 20 mm (3/4 in)
  • 25 mm (1 in)
  • WLL:
  • 130 kg (278 lb.)
  • 190 kg (410 lb.)
  • 240 kg (525 lb.)
  • 420 kg (935 lb.)
  • 640 kg (1420 lb.)
  • 1140 kg (2520 lb.)
Prev
Finish
Please select an option
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3

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