Appendix A - Glossary - Snorkel S2255RT Operator's Manual

aerial platform – a mobile device that has an adjustable position platform,
supported from ground level by a structure.
ambient temperature – the air temperature of the immediate environment.
authorized personnel – personnel approved as assigned to perform
specifi c duties at a specifi c location.
base – the relevant contact points of the aerial platform that form the
stability support (e.g. wheels, casters, stabilizers).
battery tray – a swing-out compartment that holds all, or some, of the
machine batteries.
center of gravity – the point in the aerial platform around which its weight
is evenly balanced.
chassis – the integral part of the aerial platform that provides mobility and
support for the scissors structure.
control valve tray – a swing-out compartment that holds the control valve,
freewheeling valve, hand pump, and the diagnostic display.
fall protection – a system to protect against falls that may include either a
fall restraint or personal fall arrest system as required by national or local
regulations and standards.
fall restraint – a system that is used while working on a boom lift within
the boundaries of platform guardrails to provide restraint from being pro-
jected upward from the platform. This system includes a harness or belt,
lanyard, and a lanyard anchor. Although federal regulations, OSHA, ANSI,
and Snorkel do not require the use of additional fall protection beyond the
platform guardrails on scissor lift aerial platforms, local, state, or employer
rules may require their use.
fl oor or ground pressure – the maximum pressure, expressed in pounds
per square inch, a single wheel concentrates on the fl oor or ground.
free-wheeling valve – a needle valve that, when adjusted open, allows
hydraulic fl uid to fl ow through the wheel drive motors. This allows the
aerial platform to be pushed or towed without damage to the drive motors.
gradeability – the maximum slope that the aerial platform is capable of travel.
ground fault circuit interrupter (GFCI) – a fast-acting circuit breaker that
opens to stop electrical circuit fl ow if it senses a very small current leakage
to ground. The GFCI is used to protect personnel against a potential shock
hazard from defective electrical tools or wiring.
guardrail system – a vertical barrier around the platform to prevent
personnel from falling.
hazardous location – any location that contains, or has the potential to con-
tain, an explosive or fl ammable atmosphere as defi ned by ANSI/NFPA 505.
hydraulic tray – a swing-out compartment that holds the hydraulic pump,
fl uid reservoir and the fl uid fi lter.
level sensor – a device that detects a preset degree of variation from
perfect level. The level sensor is used to sound an alarm if operating on
a slope greater than the preset value.
lower controls – the controls located at ground level for operating some
or all of the functions of the aerial platform.
manufacturer – a person or entity who makes, builds or produces an
aerial platform.
maximum travel height – the maximum platform height or the most ad-
verse confi guration(s) with respect to stability in which travel is permitted
by the manufacturer.
S2255RT S2755RT - 15286-1
Appendix A – Glossary
maximum wheel load – the load or weight that can be transmitted through
a single wheel to the fl oor or ground.
MEWP – Mobile Elevating Work Platform.
Minimum Safe Approach Distance (M.S.A.D.) – the minimum safe
distance that electrical conductors may be approached when using the
aerial platform.
operation – the performance of any aerial platform functions within the
scope of its specifi cations and in accordance with the manufacturer's
instructions, the users work rules, and all applicable governmental
regulations.
operator – a qualifi ed person who controls the movement of an aerial platform.
personal fall arrest system – a fall protection system that is used while
working on an unprotected edge (such as a roof top with no guardrail).
This system includes a harness, lanyard or other connecting device, a
fall arrestor, an energy absorber or decelerator, an anchorage connector,
and a secure anchorage such as a building beam, girders or columns. An
aerial platform is not a fall arrest anchorage.
platform – the portion of an aerial platform intended to be occupied by
personnel with their tools and materials.
platform height – the vertical distance measured from the fl oor of the
platform to the surface upon which the chassis is being supported.
pothole protection interlock – a safety feature that sounds an alarm and
automatically stops the platform raise function if the pothole protection
skids are prevented from lowering properly.
pothole protection system – a mechanical tip-over prevention system
consisting of skids along the bottom of both sides of the chassis which
lower as the platform is raised.
prestart inspection – a required safety inspection routine that is performed
daily before operating the aerial platform.
qualifi ed person – a person, who by reason of knowledge, experience, or train-
ing is familiar with the operation to be performed and the hazards involved.
rated work load – the designed carrying capacity of the aerial platform
as specifi ed by the manufacturer.
safety prop – a bar that when properly positioned mechanically prevents
the platform from lowering.
stow – to place a component, such as the platform, in its rest position.
turning radius – the radius of the circle created by the wheel during a
360° turn with the steering wheels turned to maximum. Inside turning
radius is the wheel closest to the center and outside turning radius is the
wheel farthest from the center.
unrestricted rated work load – the maximum designed carrying ca-
pacity of the aerial platform allowed by the manufacturer in all operating
confi gurations.
upper controls – the controls located on or beside the platform used for
operating some or all of the functions of the aerial platform.
wheelbase – the distance from the center of the rear wheel to the center
of the front wheel.
working envelope – the area defi ned by the horizontal and vertical limits
of travel that the platform may be positioned in.
working height – platform height plus six feet (1.8 meters).