Rope Construction and Rope Fiber Selection Guides

Rope Construction and Rope Fiber Selection Guides
CHARACTERISTICS SOLID BRAID HOLLOW BRAID DOUBLE BRAID DIAMOND BRAID TWISTED
Number of Strands or Carriers 9, 12 or 18 8, 12 or 16 16, 24 or 32 8 or 16< 3
Spliceable No Yes Yes No Yes
Strength to Weight 5 2 1 4 3
Flexibility 3 1 2 4 5
Flattens Under Load No Yes No Yes No
Rotates Under Load No No No No Yes
Mechanical Elongation 1 4 5 3 2
Cost Per Size 2 4 1 3 5
Working Load (as a % of TensileL) 15-20% 15-20% 15-20% 15-20% 8-14%
Abrasion Resistance 1 5 2 3 4
*WARNING:This guide is designed for general reference only. The construction comparisons assume using the same rope fiber and size. Expert advice should be sought when choosing a rope where protection of life or property is involved. solid braid rope hollow braid rope double braid rope diamond braid rope twisted rope

ROPE FIBER SELECTION GUIDE: Fiber Properties- Typical Values

Manila Sisal Cotton Nylon Polyester Poly-propylene Poly-ethylene Kevlar(1) Spectra (2)
STRENGTH: Breaking Tenacity- Dry (grams/ denier) Wet Strength vs. Dry Strength Shock-load Absorption Ability 5.0-6.0 Up to 120%
Poor
4.0-5.0 Up to 120%
Poor
2.0-3.0 Up to 120%
Very Poor
7.0-9.5 85-90%
Excellent
7.0-9.5 100%
Good
6.5 100%
Very Good
6.0 100%
Fair
18-26.5 95%
Poor
30.0 100%
Fair
WEIGHT: Specific Gravity Floats 1.38
No
1.38
No
1.54
No
1.14
No
1.38
No
0.91
No
0.95
No
1.44
No
0.97
No
ELONGATION: Percent at Break Creep (extension under sustained load) 10-12%
Very Low
10-12%
Very Low
5-12%
Very Low
18-25%
Moderate
12-15%
Low
15-25%
High
15-25%
High
1.5-3.6%
Very Low
3.5%
Moderate
EFFECTS OF MOISTURE: Water Absorp. of Indiv. Fibers Dielectric Properties Up to 100%
Very Poor
Up to 100%
Very Poor
Up to 100%
Very Poor
2.8%
Poor
<1%
Good
None
Excellent
None
Excellent
3.5-7.0%
Poor
None
Excellent
DEGRADATION: Resistance to UV in Sunlight
Resistance to Rot and Mildew Storage Requirements
Good
Poor
Dry Only
Good
Poor
Dry Only
Good
Poor
Dry Only
Good
Excellent
Wet or Dry
Excellent
Excellent
Wet or Dry
Poor (black is best)
Excellent
Wet or Dry
Fair (black is best)
Excellent
Wet or Dry
Fair
Excellent
Wet or Dry
Fair
Excellent Wet or Dry
ROPE ABRASION RESISTANCE: Surface
Internal
Good
Fair
Fair
Fair
Poor
Fair
Very Good
Excellent
Excellent
Excellent
Good
Good
Good
Good
Fair
Fair
V. Good
Excellent
THERMAL PROPERTIES:
Melts at
Does not melt Chars at 350° Does not melt Chars at 350° Does not melt Chars at 300° 420°-480° 490°-500° 330° 275° 800°- Begins to Decompose 297°
RESISTANCE:
Resistance to Acids
Resistance to Alkalis
Resistance to Oils and Gas
Poor
Poor
Poor
Poor
Poor
Fair
Poor
Fair
Poor
Fair
Very Good
Very Good
Good
Fair
Very Good
Excellent
Excellent
Very Good
Excellent
Excellent
Very Good
Fair
Fair
Very Good
Excellent
Excellent
Very Good

 

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