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to Double
Braids Main
Page |
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Rope Characteristic
Yale PoBOn is a double braided rope consisting
of a polyester sleeve covering an inner load-bearing core of 100% Zylon® PBO.
Zylon PBO poly (p-phenylene-2, 6-benzobisoxazole), manufactured by
Toyobo of Japan *, is a rigid isotropic crystal polymer. It has outstanding tensile strength, high modulus, flame resistance and
thermal stability.
PBO has some moisture gain in the range of 0.6%, slightly greater than
polyester, and is dimensionally stable against humidity.
Yale PoBOn is identified by a single black and a single red strand separated
by four white strands, braided into the sleeve.
Specific Gravity - 1.48 |
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| Diam Inches |
Average Break
Strength Pounds |
Minimum Break
Strength Pounds |
Max. Working
Load 5:1 |
Weight Pounds
Per 100 ft. |
|
| 3/16 |
4,400 |
3,960 |
880 |
1.2 |
| 1/4 |
7,000 |
6,300 |
1,400 |
2.2 |
| 5/16 |
11,000 |
9,900 |
2,200 |
2.8 |
|
| 3/8 |
17,500 |
15,750 |
3,700 |
4.2 |
| 7/16 |
24,000 |
21,600 |
4,800 |
6.5 |
| 1/2 |
30,000 |
27,000 |
6,000 |
8.1 |
|
| 9/16 |
36,500 |
32,800 |
7,300 |
10.4 |
| 5/8 |
46,000 |
41,400 |
9,200 |
12.2 |
| 3/4 |
68,000 |
61,200 |
13,600 |
18.0 |
|
| 7/8 |
95,200 |
85,600 |
19,040 |
24.0 |
| 1 |
121,000 |
108,900 |
24,200 |
31.0 |
| 1-1/8 |
152,000 |
136,800 |
30,400 |
39.5 |
|
| 1-1/4 |
181,000 |
162,900 |
36,200 |
46.2 |
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Shock loads
All high modulus fibered ropes have
low stretch and little tolerance for shock loads. It’s ill advised
to select a high strength rope in an attempt to solve shock loading problems.
Elastic Elongation (PoBOn™)
The colored area under the curve represents the rope's energy absorption
capability.
 Green
working 185 ft. lbs/lb
 Red
ultimate 4,444 ft. lbs/lb.
PoBOn is made to Yale Specification #YCI-PO-0099. |
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