Personal Escape Descenders
For more information, please read the paper on these products.
Frame Strength: 14,000 lbs. plus
For 9-10mm Line
Frame Strength: 11,000 lbs. plus
For 7.9 to 8.5mm Line
corrosion, and heat resistance
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Nano-Rack and Pico-Rack Personal Escape Descenders |
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The BMS Nano/Pico-Racks were designed for personal lowering and escape systems
employing 7.9 to 10mm personal escape lines. Once properly rigged to the line,
the Nano/Pico-Rack cannot become detached from the line. This eliminates the
possibility of accidental derigging. The movable bars make line feeding easy,
an advantage when establishing an anchor at a distance from the exit point.
They also act as a self compensating mechanism which equalizes brake force
with body weight, the greater the load the more friction generated by the rack.
For more information, please read the paper on these products.
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| Specifications | ||||
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Frame Strength: 14,000 lbs. plus For 9-10mm Line |
Frame Strength: 11,000 lbs. plus For 7.9 to 8.5mm Line |
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corrosion, and heat resistance |
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Testing Data: Pico-Rack
Tests per NFPA 1983 (95 Ed) |
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The PICO-RACK was tested in accordance with the NFPA 1983 (95 Ed) Standard.
The device was attached to a length of PMI 8mm Personal Escape Line in the
manner of function and loaded to a force of 1,200 lbf. for a period of 30
seconds. The force was then removed and the device inspected for any permanent
damage or deformation with none found. The rope was also closely inspected at
this point with no damage found.
The PICO-RACK was reattached to the test setup as in the previous test and subjected to a force of 3,000 lbf. and held for a period of 30 seconds without failure. The force was then increased to 3500 lbf. at which point the rope failed.
From the above test data it can be safely assumed the the PICO-RACK will
easily pass the requirements of the standard for certification as a “personal
use” descent control device.
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| Performance Tests | ||
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Using three manufacturer’s personal escape lines, the force to control the
descent of a 212 lb. test subject (attached to the PICO-RACK in the “standard”
configuration) was measured using a digital fish scale. This was attached to
the location where the brake hand would normally grip the rope with a small
prussic cord and the fish scale held by the test subject’s brake hand.
Readings were taken by a separate observer. OTT is an added friction
configuration which is achieved by directing the rope held in the brake hand
“Over The Top” and between the lock-nuts of the PICO-RACK.
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| ROPE | BRAKE FORCE (lbf) | OTT (lbf) |
| Sterling 7.9mm | 14-20 | 4-8 |
| N.E.R. 8mm | 14-18 | 5-7 |
| P.M.I. 8mm | 7-9 | 1-3 |
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As can be seen from the above numbers the PICO-RACK exhibited good control(10-20 lbf) on the Sterling and N.E.R. ropes in the “standard” configuration and excellent control (1-10 lbf) on the P.M.I. rope in the “standard” configuration as well as all the OTT configurations. |
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