Rope Characteristics

Polydyne is a double-braided rope that utilizes a polyester sleeve over a nylon core. Despite the dissimilar stretch characteristics of these fibers, Yale engineers have produced constructions where both fibers contribute.

The resulting rope has high breaking strength and more stretch in its working load range, which in many applications is a plus. Polydyne is up to taking more dynamic abuse without being degraded prematurely. Take special note of the working energy-absorption rating, which is the amount of energy a rope absorbs before reaching its working load. The ultimate energy absorption of this rope is also correspondingly high. All this and a tough polyester jacket make this a long-wearing rope with extraordinary dynamic capabilities.


Breaking Strengths

Diameter
(Inches)		 Weight
(Lbs/100f)		 Average Spliced Break Strength*
(Lbs)		 Minimum Spliced Break Strength*
(Lbs)		 Maximum Working Load 5:1**
(Lbs)
1/4 1.9 2,875 2,588 575
5/16 2.8 4,370 3,933 874
3/8 4.4 5,750 5,175 1,150
7/16 5.8 8,625 7,763 1,725
1/2 7.6 13,280 11,952 2,656
9/16 9.7 15,950 14,355 3,190
5/8 13.6 22,300 20,070 4,460
3/4 18.5 30,360 27,324 6,072
7/8 24.4 38,640 34,776 7,728
1 31.5 48,300 43,470 9,660
1-1/8 41.5 57,200 51,480 11,440
1-1/4 50.8 71,500 64,350 14,300
1-5/16 55.0 84,700 76,230 16,940
1-1/2 66.0 99,000 89,100 19,800
* Knots and abrupt bends significantly reduce the strength of all ropes and lower maximum working load.
** Working load is based on static or moderately dyanmic lifting/pulling operations. Instantaneous changes in load, up or down, in excess or 10% of the rope’s related working load constitute hazardous shock load and would void the normal working-load recommendation. Consult Yale Cordage for guidelines for working loads and the safe use of rope.
Diameter
(mm)		 Weight
(Kg/100m)		 Average Spliced Break Strength*
(kg)		 Minimum Spliced Break Strength*
(kg)		 Maximum Working Load 5:1**
(kg)
6 2.8 1,305 1,175 261
8 4.2 1,980 1,782 396
10 6.6 2,610 2,349 522
11 8.6 3,915 3,524 783
13 11.3 6,025 5,423 1,205
14 14.4 7,240 6,516 1,448
16 20.3 10,120 9,108 2,024
19 27.5 13,780 12,402 2,756
22 36.3 17,540 15,786 3,508
25 46.9 21,925 19,733 4,385
29 61.8 25,965 23,369 5,193
32 75.6 32,460 29,214 6,492
33 81.9 38,450 34,605 7,690
38 98.3 44,945 40,451 8,989
* Knots and abrupt bends significantly reduce the strength of all ropes and lower maximum working load.
** Working load is based on static or moderately dyanmic lifting/pulling operations. Instantaneous changes in load, up or down, in excess or 10% of the rope’s related working load constitute hazardous shock load and would void the normal working-load recommendation. Consult Yale Cordage for guidelines for working loads and the safe use of rope.

Rope Details

Fiber Type: Nylon Core, Polyester Sleeve
Elongation at WL: 5.1%
Elongation at Ult Break: 20.8 – 21.8%
Specific Gravity: 1.24 g/cc
Dielectric Strength: The maximum allowable leakage for clean, dry Polydyne is 500 micro-amperes when tested at 100kV per Yale Method 712-1701 Rev 1 “Routine Production Test.” Absorbed and entrained moisture or impurities will increase rope’s conductivity dramatically.

Rope Benefits

High break strength with more stretch in the working load range
Extraordinary dynamic capabilities

Elastic Elongation

The coloured area under the curve represents the rope’s energy absorption capability.

Green Working 576 ft. lbs/lb.
Red Ultimate 11,187 ft. lbs/lb.
Maximum Working Load
Minimum Break Strength
Average Break Strength