3
1.0 APPLICATION
1.1 PURPOSE:
The Rollgliss™ Emergency Descent Device is intended for emergency sloped descent only. It controls
the descent speed of one user, wearing a full Body harness, attached to the manual brake trolley on the end of the
Emergency Descent Device’s Lifeline.
WARNING:
The Emergency Descent Device must not be used as a fall arrest device.
1.2 LIMITATIONS:
The following application limitations must be recognized and considered before using this product:
A. CAPACITY:
This equipment is designed for use by persons with a combined weight (including tools, clothing, body
support, etc.) of 75 lbs (34 kg) to 310 lbs (141 kg).
B. DESCENT SPEED:
The speed at which the user will be lowered when using the Emergency Descent Device increases
with the combined weight of the user. The below values are approximate and can be affected by sag of Guide Cable,
user weight, length of system, location of user on the span and environmental conditions. One can expect a range of
+/- 2 ft/s for each listed speed.
NOTE:
These descent speeds assume no additional braking is applied by use of the manual Brake Trolley.
SLOPED DESCENT
Angle
(from
Vertical)
Weight
lbs (kg)
Descent Speed
ft/s (m/s)
Angle
(from
Vertical)
Weight
lbs (kg)
Descent Speed
ft/s (m/s)
75
120 lbs. (55 kg)
3.7 ft/s (1.1 m/s)
55
120 lbs. (55 kg)
8.2 ft/s (2.5 m/s)
75
220 lbs. (100 kg) 6.8 ft/s (2.1 m/s)
55
220 lbs. (100 kg) 11.5 ft/s (3.5 m/s)
75
300 lbs. (136 kg) 9.3 ft/s (2.8 m/s)
55
300 lbs. (136 kg) 12.9 ft/s (3.9 m/s)
70
120 lbs. (55 kg)
4.9 ft/s (1.5 m/s)
50
120 lbs. (55 kg)
9.2 ft/s (2.9 m/s)
70
220 lbs. (100 kg) 9.0 ft/s (2.7 m/s)
50
220 lbs. (100 kg) 12.0 ft/s (3.6 m/s)
70
300 lbs. (136 kg) 12.3 ft/s (3.7 m/s)
50
300 lbs. (136 kg) 13.6 ft/s (4.1 m/s)
65
120 lbs. (55 kg)
6.1 ft/s (1.8 m/s)
45
120 lbs. (55 kg)
10.1 ft/s (3.1 m/s)
65
220 lbs. (100 kg) 11.1 ft/s (3.4 m/s)
45
220 lbs. (100 kg) 12.4 ft/s (3.8 m/s)
65
300 lbs. (136 kg) 11.5 ft/s (3.5 m/s)
45
300 lbs. (136 kg) 13.1 ft/s (4.0 m/s)
60
120 lbs. (55 kg)
7.2 ft/s (2.2 m/s)
60
220 lbs. (100 kg) 10.9 ft/s (3.3 m/s)
60
300 lbs. (136 kg) 12.2 ft/s (3.7 m/s)
C. HAZARDOUS AREAS:
Use of the Emergency Descent Device in hazardous areas may require additional precautions
to reduce the possibility of injury to the user or damage to the equipment. Hazards may include, but are not limited
to high heat, caustic chemicals, corrosive environments, high voltage power lines, explosive or toxic gases, moving
machinery, and sharp edges.
D. TRAINING:
The Emergency Descent Device is intended to be installed and used by persons trained in its correct
application and use.
1.3 APPLICABLE STANDARDS:
Refer to local, state, and federal (OSHA) standards for requirements governing the use of
the Emergency Descent Device.
2.0 SYSTEM REQUIREMENTS
2.1 COMPATIBILITY OF COMPONENTS:
3M Fall Protection equipment is designed for use with 3M Fall Protection
approved components and subsystems only. Substitutions or replacements made with non-approved components or
subsystems may jeopardize compatibility of equipment and may effect the safety and reliability of the complete system.
2.2 COMPATIBILITY OF CONNECTORS:
Connectors (hooks, carabiners, D-rings) used to suspend the Emergency Descent
Device must be capable of supporting at least 3,000 lbs (1,361 kg). Connectors must be compatible in size, shape,
and strength. Non compatible connectors may unintentionally disengage (roll-out). Roll-out occurs when interference
between the connector and anchorage connector causes the hook or carabiner gate to unintentionally open and release.
Self locking snap hooks and carabiners must be used with this system to reduce the possibility of roll-out. Do not use
connectors that will not completely close over the attachment element.
2.3 ANCHORAGE STRENGTH - 200 FT EMERGENCY SLOPED DESCENT DEvICES:
Anchorages used to suspend the
Emergency Descent Device must sustain static loads, applied along the axis of the device, of at least 3,000 lbs (1,361
kg). When more than one Emergency Descent Device is attached to an anchorage the strengths stated above must be
multiplied by the number of descent devices attached to the anchorage.
2.4 GUIDE CABLE:
Applications with a sloped descent require a guide cable (see Figure 2, Item C). Systems requiring a
guide cable must be designed by a qualified person. Descent speed is affected by the angle at which the guide cable is
secured and the amount of sag in the guide cable. The guide cable must be installed with sufficient slope and limited sag
to ensure the user will reach the landing area in the event of an emergency descent. The guide cable and the anchorage
point must support the weight of the user in a descent. The Guide Cable must be 3/8 inch (.9525 cm) to 5/8 inch (1.5875
cm) wire rope. The operation of the emergency descent system should be verified by performing a test descent in
accordance with Section 3.2C.
