South Carolina Code of Regulations
Chapter 38 - DEPARTMENT OF PUBLIC SAFETY
Article 5 - STATE TRANSPORT POLICE REGULATIONS
Subarticle 1 - UNMANUFACTURED FOREST PRODUCTS TRUCKING REGULATIONS
Part 38-393 - PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION
Subpart I - PROTECTION AGAINST SHIFTING OR FALLING CARGO
Section 38-393.108 - How is the working load limit of a tiedown determined?
Current through Register Vol. 48, No. 9, September 27, 2024
(a) The working load limit (WLL) of a tiedown, associated connector or attachment mechanism is the lowest working load limit of any of its components (including tensioner), or the working load limit of the anchor points to which it is attached, whichever is less.
(b) The working load limits of tiedowns may be determined by using either the tiedown manufacturer's markings or by using the tables. The working load limits listed in the tables are to be used when the tiedown material is not marked by the manufacturer with the working load limit. Tiedown materials which are marked by the manufacturer with working load limits that differ from the tables, shall be considered to have a working load limit equal to the value for which they are marked.
(c) Synthetic cordage (e.g., nylon, polypropylene, polyester) which is not marked or labeled to enable identification of its composition or working load limit shall be considered to have a working load limit equal to that for polypropylene fiber rope.
(d) Welded steel chain which is not marked or labeled to enable identification of its grade or working load limit shall be considered to have a working load limit equal to that for grade 30 proof coil chain.
(e)
(f) Manila rope which is not marked by the manufacturer with a working load limit shall be considered to have a working load limit based on its diameter as provided in the tables or working load limits.
(g) Friction mats which are not marked or rated by the manufacturer shall be considered to provide resistance to horizontal movement equal to 50 percent of the weight placed on the mat.
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Tables to Sec. 38*393.108 [Working Load Limits (WLL), Chain] |
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WLL in kg (pounds) |
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Size mm (inches) |
Grade 30 proof coil |
Grade 43 high test |
Grade 70 transport |
Grade 80 alloy |
Grade 100 alloy |
|
1.7 (1/4) ... |
580 (1,300) |
1,180 (2,600) |
1,430 (3,150) |
1,570 |
1,950 (4,300) |
|
2.8 (5/16).. |
860 (1,900) |
1,770 (3,900) |
2,130 (4,700) |
2,000 |
2,600 (5,700) |
|
3.10 (3/8).. |
1,200 (2,650) |
2,450 (5,400) |
2,990 (6,600) |
3,200 |
4,000 (8,800) |
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4.11 (7/16). |
1,680 (3,700) |
3,270 (7,200) |
3,970 (8,750) |
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5.13 (1/2).. |
2,030 (4,500) |
4,170 (9,200) |
5,130 (11,300) |
5,400 |
6,800 |
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6.16 (5/8).. |
3,130 (6,900) |
5,910 (13,000) |
7,170 (15,800) |
8,200 |
10,300 |
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Chain Mark Examples: |
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Example 1.. . |
3 |
4 |
7 |
8 |
10 |
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Example 2 ... |
30 |
43 |
70 |
80 |
100 |
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Example 3 .. . |
300 |
430 |
700 |
800 |
1000 |
Synthetic Webbing
|
Width mm (inches) |
WLL kg (pounds) |
|
45 (1\3/4) |
790 (1,750) |
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50 (2) |
910 (2,000) |
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75 (3) |
1,360 (3,000) |
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100 (4) |
1,810 (4,000) |
Wire Rope (6 x 37, Fiber Core)
|
Diameter mm (inches) |
WLL kg (pounds) |
|
7 (1/4) |
640 (1,400) |
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8 (5/16) |
950 (2,100) |
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10 (3/8) |
1,360( 3,000) |
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11 (7/16) |
1,860( 4,100) |
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13 (1/2) |
2,400( 5,300) |
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16 (5/8) |
3,770( 8,300) |
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20 (3/4) |
4,940( 10,900) |
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22 (7/8) |
7,300( 16,100) |
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25 (1) |
9,480(20,900) |
Manila Rope
|
Diameter mm (inches) |
WLL kg (pounds) |
|
10 (3/8) |
90 (205) |
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11 (7/16) |
120 (265) |
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13 (1/2) |
150 (315) |
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16 (5/8) |
210 (465) |
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20 (3/4) |
290 (640) |
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25 (1) |
480 (1,050) |
Polypropylene Fiber Rope WWL (3 Strand and 8 Strand Constructions)
|
Diameter mm (inches) |
WLL kg (pounds) |
|
10 (3/8) |
180 (400) |
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11 (7/16) |
240 (525) |
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13 (1/2) |
280 (625) |
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16 (5/8) |
420 (925) |
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20 (3/4) |
580 (1,275) |
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25 (1) |
950 (2,100) |
Polyester Fiber Rope WWL (3 Strand and 8 Strand Constructions)
|
10 (3/8) |
250 (555) |
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11 (7/16) |
340 (750) |
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13 (1/2) |
440 (960) |
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16 (5/8) |
680 (1,500) |
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20 (3/4) |
850 (1,880) |
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25 (1) |
1,500 (3,300) |
Nylon Rope
|
10 (3/8) |
130 (278) |
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11 (7/16) |
190 (410) |
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13 (1/2) |
240 (525) |
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16 (5/8) |
420 (935) |
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20 (3/4) |
640 (1,420) |
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25 (1) |
1,140 (2,520) |
Double Braided Nylon Rope
|
10 (3/8) |
150 (336) |
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11 (7/16) |
230 (502) |
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13 (1/2) |
300 (655) |
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16 (5/8) |
510 (1,130) |
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20 (3/4) |
830 (1,840) |
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25 (1) |
1,470 (3,250) |
Steel Strapping
|
31.7 x .74 (1 1/4 x 0.029) |
540 (1,190) |
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31.7 x 79 (1 1/4 x 0.031) |
540 (1,190) |
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31.7 x 89 (1 1/4 x 0.035) |
540 (1,190) |
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31.7 x 1.12 ( 1 1/4 x 0.044) |
770 (1,690) |
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31.7 x 1.27 (1 1/4 x 0.05) |
770 (1,690) |
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31.7 x 1.5 (1 1/4 x 0.057) |
870 (1,925) |
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31.7 x 1.12 (2 x 0.044) |
1,200 (2,650) |
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31.7 x 1.27 (2 x 0.05) |
1,200 (2,650) |
[FN*] So in original. No paragraph (e)(2) was promulgated by State Register Volume 30, Issue No. 4, eff April 28, 2006.
