Cordage – Comparative Weight Strength and Working Load Chart

Cordage – Comparative Weight Strength and Working Load Chart
NOMINAL SIZE   MANILA   NYLON   POLYPROPYLENE
Diameter Circumference Linear Density 1 (Lbs./100ft.) Minimum Tensile 2 Strength (Lbs.) Max. Working 3 Load (Lbs.) Linear Density 1 (Lbs./100ft.) Minimum Tensile 2 Strength (Lbs.) Max. Working 3 Load (Lbs.) Linear Density 1(Lbs./100ft.) Minimum Tensile 2 Strength (Lbs.) Max. Working Load (Lbs.)
3/16 5/8 1.50 4.06 41 1.00 900 75 .70 720 72
1/4 3/4 2.00 540 54 1.50 1,490 124 1.20 1,130 113
5/16 1 2.90 900 90 2.50 2,300 192 1.80 1,710 171
3/8 1- 1/8 4.10 1,220 122 3.50 3,340 278 2.80 2,440 244
7/16 1- 1/4 5.25 1,580 176 5.00 4,500 410 3.80 3,160 352
1/2 1- 1/2 7.50 2,380 264 6.50 5,750 525 4.70 3,780 420
9/16 1- 3/4 10.4 3,100 388 8.15 7,200 720 6.10 4,600 575
5/8 2 13.3 3,960 496 10.5 9,350 935 7.50 5,600 700
3/4 2- 1/4 16.7 4,860 695 14.5 12,800 1,420 10.7 7,650 1,090
13/16 2- 1/2 19.5 5,850 835 17.0 15,300 1,700 12.7 8,900 1,270
7/8 2- 3/4 22.4 6,950 995 20.0 18,000 2,000 15.0 10,400 1,490
1- 1/16 3- 1/4 31.2 9,450 1,350 29.0 26,000 2,880 20.4 14,400 2,060
1- 1/8 3- 1/2 36.0 10,800 1,540 34.0 29,80 3,320 23.8 16,500 2,360
1- 1/4 3- 3/4 41.6 12,200 1,740 40.0 33,800 3,760 27.0 18,900 2,700
1- 5/16 4 47.8 13,500 1,930 45.0 38,800 4,320 30.4 21,200 3,020
1- 1/2 4- 1/2 60.0 16,700 2,380 55.0 47,800 5,320 38.4 26,800 3,820
1- 5/8 5 74.5 20,200 2,880 66.5 58,500 6,500 47.6 32,400 4,620
1- 3/4 5- 1/2 89.5 23,800 3,400 83.0 70,000 7,800 59.0 38,800 5,550
2 6 108. 28,000 4,000 95.0 83,000 9,200 69.0 46,800 6,700
2- 1/8 6- 1/2 125. 32,400 4,620 109. 95,500 10,600 80.0 55,000 7,850
2- 1/4 7 146. 37,000 5,300 129. 113,000 12,600 92.0 62,000 8,850
2- 1/2 7- 1/2 167. 41,800 5,950 149 126,000 14,000 107. 72,000 10,300
2- 5/8 8 191. 46,800 6,700 168. 146,000 16,200 120. 81,000 11,600
2- 7/8 8- 1/2 215. 52,000 7,450 189. 162,000 18,000 137. 91,000 13,000
3 9 242. 57,500 8,200 210. 180,000 20,000 153. 103,000 14,700
3- 1/4 10 298. 69,500 9,950 264. 226,000 25,200 190. 123,000 17,600
3- 5/8 11 366. 82,000 11,700 312. 270,000 30,000 232. 146,000 20,800
4 12 434. 94,500 13,500 380. 324,000 36,000 276. 171,000 24,000
4- 1/4 13       445. 380,000 42,200 325. 202,000 28,900
4- 1/2 14       520. 441,000 49,000 375. 234,000 33,400
5 15       590. 507,000 56,300 430. 268,000 38,300
5- 1/4 16       675. 572,000 63,600 490. 302,000 43,100
5- 5/8 17       765. 635,000 70,600 555. 329,000 47,000
6 18       860. 698,000 77,600 625. 360,000 51,400

Notes:

  1. LINEAR DENSITY: (pounds per 100 feet) shown is “average”. Maximum is 5% higher.
  2. NEW ROPE TENSILE STRENGTHS: are based on tests of new and unused rope of standard construction in accordance with Cordage Institute Standard Test Methods.
  3. MAX. WORKING LOADS: are for rope in good condition with appropriate splices in noncritical applications, and under normal service conditions. Working loads should be reduced where life, limb, or valuable property are involved, or for exceptional service conditions such as shock loads, sustained loads, etc. These specifications are for 3-strand laid standard ropes. Four-strand ropes weigh approximately 7% more and breaking tests are approximately 5% less than 3-strand ropes.

CAUTION!!

  1. Working loads are recommended guidelines only.
  2. Specs are based on test of new and unused ropes of current manufacturers.
  3. Once rope is put into service it is continuously deteriorating.
  4. Manila and sisal rope will deteriorate in storage even under ideal conditions.