Ropes

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A rope is a length of fibers, twisted or braided together to improve strength for pulling and connecting. It has tensile strength but is too flexible to provide compressive strength (i.e. it can be used for pulling, but not pushing). Rope is thicker and stronger than similarly constructed cord, line, string, or twine.


MANILA

Manila rope was once the preferred choice in ropes before synthetic fibers were developed. Manila ropes still maintain some advantages to synthetic fibers. It is not affected by heat, and has an excellent resistance to the sun’s UV rays.

Manile.jpg

SISAL

Sisal fibers come from the Agave and Sisalana plants grown in some tropical countries. Sisal has many of the characteristics of manila, but offers only 80% of its strength. It is more economical than manila, and makes a good choice as a general purpose rope. It is commonly used as a tying twine.

Sisal.jpg

JUTE

Jute is mainly used as a tying twine. It knots very well. Due to its short fibers, it does not have much strength.

Jute.jpg

COTTON

Cotton is a very short staple fiber, naturally white in colour. Due to its softness is nice to handle and knots well.

Cotton.jpg

POLYPROPYLENE

Polypropylene and Polyethylene make flexible and lightweight ropes. They are rot proof, resist oil, water, gasoline, and most chemicals. They are the only rope fibers that float. Available twisted or braided, they are a perfect economical choice as a general purpose rope.


Polypro.jpg

NYLON

Nylon is known for its elasticity and tremendous shock absorbing properties. It has good abrasion resistance, is rot proof, resists oil, gasoline, and most chemicals. It has good resistance to UV (ultraviolet) rays and will last 4-5 times longer than natural fibers. Nylon.jpg

POLYESTER

Polyester is very strong and provides excellent abrasion resistance. Polyester stretches less than nylon, so it does not have the elasticity or shock absorbing qualities that nylon does. It has good resistance to UV rays, and resists rot, oil, gasoline and most chemicals. It is very popular as a marine or industrial rope where stretch is not desired.

Polyester.jpg


Chart

COMPARISON CHART
Size Size Size WEIGHT PER 100 FEET (in lbs) MINIMUM TENSILE STRENGTHS (in lbs)! Braid on braid Braid on braid
DIA. MM DIA. INCHES CIR. INCHES MANILA GRADE A-1 NYLON POLY SISAL MANILA GRADE A-1 NYLON POLY SISAL NYLON POLYESTER
4.8 3/16 9/16 1.5 1.25 0.8 1.47 450 1,100 720 360 - -
7.9 5/16 1 2.9 3.08 1.8 2.84 1,000 2,700 1,490 800 3,400 4,200
9.5 3/8 1-1/8 4.1 4 2.7 4.02 1,350 3,500 2,120 1,080 4,750 5,600
11.1 7/16 1-1/4 5.3 5 3.8 5.15 1,750 4,300 2,820 1,400 6,600 7,360
12.7 1/2 1-1/2 7.5 7 4.9 7.35 2,650 5,950 3,650 2,120 8,200 9,870
14.3 9/16 1-3/4 10.4 9.33 6.3 9.8 3,450 7,900 4,590 2,760 9,945 12,600
16 5/8 2 13.3 10.5 7.55 11.6 4,400 8,800 5,450 3,520 14,700 15,500
19 3/4 2-1/4 16.7 15.4 11.4 16.5 5,400 12,700 7,830 4,320 18,500 19,400
21 13/16 2-1/2 19.5 19.2 13 19.1 6,500 15,700 8,910 5,200 - -
22 7/8 2-3/4 21.2 20.6 14.7 21.2 7,700 17,000 10,170 6,160 27,400 28,400
25 1 3 27 27.5 19 25.5 9,000 22,000 12,600 7,200 32,600 37,200
27 1-1/16 3-1/4 31.3 31.9 - 30.7 10,500 25,300 - 8,400 38,100 -
28 1-1/8 3-1/2 36 37.4 25.8 35.2 12,000 29,600 16,200 9,600 43,600 45,800
31 1-1/4 3-3/4 41.8 43 31.1 40.8 13,500 33,700 18,900 10,800 50,400 54,400
34 1-5/16 4 48 49 35.5 46.9 15,000 38,200 21,150 12,000 57,200 61,500
37 1-1/2 4-1/2 60 62 45 58.8 18,500 47,700 27,900 14,800 71,800 71,300
41 1-5/8 5 74.4 76 53.5 73 22,500 58,000 32,400 18,000 88,300 87,200
45 1-3/4 5-1/2 89.5 92.4 63.2 87.7 26,500 70,000 37,800 21,200 - -
51 2 6 108 108.5 79 105 31,000 81,400 48,600 24,800 127,000 124,000
57 2-1/4 7 146 149.5 99 143 41,000 110,000 59,400 32,800 170,000 166,000
63 2-1/2 7-1/2 163 172 120 163 46,500 125,500 72,000 37,200 - -
69 2-5/8 8 191 196 135 187 52,000 142,000 79,200 41,600 221,000 212,000
75 3 9 242 247.5 165 237 64,000 177,700 101,000 51,200 274,000 278,000
81 3-1/4 10 299 306 200 292 77,000 219,000 115,200 61,600 309,000 343,000


BESTCHARACTERISTIC:****
POLY-PROPYLENE POLY-ETHYLENE NYLON POLYESTER MANILA SISAL COTTON
Shockload * * * * * * * * * * * * * * *
Rot Resistance * * * * * * * * * * * * * * * * * * *
Mildew Resistance * * * * * * * * * * * * * * * * * * *
Sunlight Resistance * * * * * * * * * * * * * * * * * * * * *
Handling * * * * * * * * * * * * * * * * * * * * * * *
Heat (Weakens at) 180 F / 82 C 150 F / 66 C 300 F / 149 C 300 F / 149 C not affected not affected not affected
Wet Storage * * * * * * * * * * * * * * * * * * *
% Elongation at Break 30 - 45% 40 - 50% 50% 30 - 40% 13 -17% 13 - 17% -
Resistance to Oil and Gas * * * * * * * * * * * * * * * * * * * * *
Resistance to Acid * * * * * * * * * * * * * * * * *
Abrasion * * * * * * * * * * * * * * * *
Durability * * * * * * * * * * * * * * * * * * *
Floats Yes Yes No No No No No
TWISTED ROPE
WORKING LOADS LBS/KG LBS/KG LBS/KG LBS/KG LBS/KG LBS/KG LBS/KG
dia. 4.8mm 70/ 32 60/ 27 75/34 30/ 14 90/41 40/ 18 -/ -
dia. 6.4mm 115/ 52 100/ 46 125/ 57 45/ 21 150/ 68 55/ 25 -/ -
dia. 7.9mm 170/ 77 150/ 68 190/ 86 70/ 32 230/ 105 90/ 41 - /-
dia. 9.5mm 245/ 112 200/ 91 275/ 125 100/ 46 335/ 152 120/ 55 - /-
dia. 12.7mm 420/ 191 335/ 152 525/239 210/ 95 600/ 273 265/ 121 - /-
dia. 16.0 mm 625/ 283 500/ 227 880/ 399 310/ 141 895/ 406 395/ 179 - /-