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Emergency Evacuation Chair Specifications
1.1 Model Type
The Emergency Evacuation Device shall be a Garaventa Evacu-Trac CD7.
1.2 Descent Speed Control Mechanism
The Emergency Evacuation Device shall be equipped with a mechanical device that
controls the descent speed to a range that is safe for the passenger and the
operator. Descent speed may vary slightly based on passenger weight and stair
angle. As a standard measurement, on a stair slope of 35 degrees and with a
passenger of 220 lbs. (100kg), the speed control mechanism shall limit the
descent speed to a maximum of 3.6 ft/sec. This descent speed control mechanism
shall limit the maximum speed regardless of the operating environment or
strength and size of the operator.
1.3 Rubber Belt Design
The Emergency Evacuation Device shall have rubber crawler belts to grip the
stair noses. The belts shall have lugs or treads to ensure positive traction
with the stair noses. The rubber crawler belts shall have integrated steel wires
that minimize the likelihood of stretching or breakage.
1.4 Carrying Capacity and Stair Angle
The Emergency Evacuation Device shall be able to carry passengers weighing up to
300 lbs. (136kg) on a stair slope of up to 40 degrees.
1.5 Passenger Size Accommodation
The Emergency Evacuation Device shall be designed to not unduly limit the
physical dimensions of passengers that can be carried. The seating sling shall
be open on the sides and shall not be designed with bars that surround or
restrict the seating area.
1.6 Passenger Restraining Straps
The Emergency Evacuation Device shall be equipped with three (3) safety straps
to ensure the passenger will be securely restrained in the Device. The safety
straps shall secure the passengers legs, mid-section, and chest and arms.
1.7 Parking Brake and Stability on Flat Surfaces
When occupied by a passenger, the Evacuation Devices must be able to remain
stable and stationary when left unattended on flat surfaces. The Evacuation
Device shall include a brake system that will prevent it from rolling when
unattended in the parked position.
1.8 Emergency Brake and Stability on Stairs
The Emergency Evacuation Device shall be equipped with a secondary, fail-safe,
emergency braking system, in addition to the main speed control system. While a
passenger occupies it, the Device must be able to come to a complete stop on the
stairway. It shall be sufficiently stable to remain momentarily unattended. The
Evacuation Device shall be able to go from a speed of 3.6-ft per/sec to a
complete stop within 1 second, without assistance from the operator.
1.9 Ease of Transfer
The Emergency Evacuation Device must be designed so that in the majority of
instances, one person trained in proper transferring procedures can
single-handedly transfer the passenger into it from a wheelchair. The Evacuation
Device's seating position shall not be higher than 12 inches from the floor to
the lowest point of the seat sling. The Evacuation Device shall be designed with
open-sides (without sidebars) to make the transfer of the passenger easy.
1.10 Usability and Operator Size / Strength Requirements
The Emergency Evacuation Device shall be operable, down stairs and across
landings with a passenger in place, by one person who has a smaller physical
size than the passenger. Size and strength of the operator shall not be a factor
in safe operation of the Device.
1.11 Weight of Evacuation Device
The weight of the Device shall not exceed 46 lbs.
1.12 Seating Material
The seating material shall be composed of fire retardant fabric.
1.13 Storage Cabinet (Optional)
Each Evacuation Device shall be supplied with a steel cabinet that will be used
to store the Evacuation Device when not in use. The cabinet shall be made of
steel with an electrostatically applied baked powder finish. The storage cabinet
shall include labeling identifying the contents. The storage cabinet shall be
45.3 inches high, 20 inches wide, and 11 inches deep.
This specification has been prepared by Garaventa Accessibility to provide
design and operational criteria for Emergency Evacuation Devices. |
