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ROPE CONSTRUCTION SELECTION GUIDE
|
Characteristics |
Rating |
Twisted |
Twisted |
Plaited |
Plaited |
Double Braid |
Hollow Braid |
|
Number of strands or carriers |
|
3 |
4 |
8 |
12 |
16, 24, 32 |
8, 12, 16 |
|
Spliceability |
Difficult -1 Easiest - 5 |
4 |
3 |
2 |
5 |
1 |
5 |
|
Strength to weight |
Most - 1 Least - 5 |
3 |
2 |
3 |
2 |
2 |
1 |
|
Flexibility |
Most - 1 Least - 5 |
4 |
3 |
3 |
3 |
2 |
1 |
|
Flattens under load |
|
No |
No |
No |
No |
No |
Yes |
|
Rotates under load |
|
Yes |
Yes |
No |
No |
No |
No |
|
Mechanical elongation |
High - 1 Low - 5 |
2 |
2 |
3 |
4 |
5 |
4 |
|
Cost per size |
High - 1 Low - 5 |
5 |
3 |
4 |
3 |
1 |
4 |
|
Working load |
% of Tensile |
5 - 20% |
5 - 20% |
10 - 25% |
10 - 25% |
10 - 25% |
5 - 20% |
|
Abrasion resistance |
Most - 1 Least - 5 |
4 |
3 |
3 |
2 |
1 |
5 |
 |
Warning: This guide is designed for GENERAL
REFERENCE ONLY. The construction comparisons assume
using the same rope and fiber size. Expert advise should
be sought when choosing a rope where risk to life or
property is involved. Rope failure or misuse can cause
injury or death. |
ROPE FIBER SELECTION GUIDE
|
Characteristics |
Rating |
Nylon |
Polyester |
Polypro |
SuperPro® |
Polydac |
Manila |
|
Strength |
Strongest - 1 Weakest - 5 |
1 |
2 |
4 |
2 |
3 |
5 |
|
Wet Strength vs. Dry Strength |
|
85% |
100% |
100% |
100% |
100% |
115% |
|
Shock Load Ability |
Strongest - 1 Weakest - 5 |
1 |
3 |
3 |
3 |
3 |
4 |
|
Floats or Sinks in Water |
|
Sinks |
Sinks |
Floats |
Floats |
Sinks |
Sinks |
|
Elongation at Break (Approximate) |
|
20 - 34% |
15 - 20% |
15 - 20% |
15 - 20% |
15 - 20% |
10 - 15% |
|
Water Absorption |
Most - 1 Least - 5 |
3 |
3 |
5 |
5 |
4 |
2 |
|
Melting Point |
|
480º F |
500º F |
330º F |
400º F |
380º F |
Chars @ 350º F |
|
Abrasion Resistance |
Most - 1 Least - 5 |
3 |
1 |
4 |
2 |
1 |
5 |
|
Resistance to Sunlight |
Most - 1 Least - 5 |
2 |
1 |
4 |
2 |
1 |
5 |
|
Resistance to Rot |
Most - 1 Least - 5 |
1 |
1 |
1 |
1 |
1 |
5 |
|
Resistance to Acids |
Most - 1 Least - 5 |
4 |
2 |
2 |
2 |
2 |
5 |
|
Resistance to Alkalis |
Most - 1 Least - 5 |
2 |
4 |
2 |
2 |
3 |
5 |
|
Resistance to Oil & Gas |
Most - 1 Least - 5 |
2 |
2 |
2 |
2 |
2 |
5 |
|
Electrical Conductivity Resistance |
Most - 1 Least - 5 |
5 |
2 |
2 |
2 |
2 |
5 |
|
Flexing Endurance |
Most - 1 Least - 5 |
1 |
2 |
3 |
3 |
3 |
5 |
|
Specific Gravity |
|
1.14 |
1.38 |
0.9 |
0.92 |
Varies |
1.38 |
|
Storage Requirements |
|
Wet or Dry |
Wet or Dry |
Wet or Dry |
Wet or Dry |
Wet or Dry |
Dry Only |
|
