Snorkel TB42J - Manual (Page 65)

TB42J – 0172310
Appendix A – Glossary
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 en-
vironment.
ammeter – an instrument for measuring the strength of an electric
current in amperes.
authorized personnel – personnel approved as assigned to per-
form specific duties at a specific location.
base – the relevant contact points of the aerial platform that form
the stability support (e.g. wheels, casters, outriggers, stabilizers).
boom – a movable cantilever beam which supports the platform.
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 mobil-
ity and support for the booms.
fall restraint – a system that is used while working on a boom lift
within the boundaries of platform guardrails to provide restraint from
being projected upward from the platform. This system includes a
harness or belt, lanyard, and a lanyard anchor. Federal OSHA, ANSI,
and Snorkel require the use of additional fall protection beyond the
platform guardrails on boom supported aerial platforms.
floor or ground pressure – the maximum pressure, expressed in
pounds per square inch, a single wheel concentrates on the floor or
ground.
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 flow if it senses a very
small current leakage to ground. The GFCI is used to protect person-
nel against a potential shock hazard from defective electrical tools
or wiring.
guardrail system – a vertical barrier around the platform to pre-
vent personnel from falling.
hazardous location – any location that contains, or has the poten-
tial to contain, an explosive or flammable atmosphere as defined by
ANSI/NFPA 505.
jib – an articulating boom attached to the tip boom which increases
the overall boom reach.
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.
main boom – a boom assembly located between the turntable and
the platform.
manufacturer – a person or entity who makes, builds or produces
an aerial platform.
maximum travel height – the maximum platform height or the
most adverse configuration(s) with respect to stability in which
travel is permitted by the manufacturer.
maximum wheel load – the load or weight that can be transmitted
through a single wheel to the floor or ground.
Minimum Safe Approach Distance – the minimum safe distance
that electrical conductors may be approached when using the aerial
platform. Also called M.S.A.D.
operation – the performance of any aerial platform functions within
the scope of its specifications and in accordance with the
manufacturer’s instructions, the users work rules, and all applicable
governmental regulations.
operator – a qualified 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 decelera-
tor, 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 floor of
the platform to the surface upon which the chassis is being sup-
ported.
prestart inspection – a required safety inspection routine that is
performed daily before operating the aerial platform.
qualified person – a person, who by reason of knowledge, expe-
rience, or training is familiar with the operation to be performed and
the hazards involved.
rated work load – the designed carrying capacity of the aerial
platform as specified by the manufacturer.
stow – to place a component, such as the platform, in its rest
position.
tip boom – a telescopic boom section that extends and retracts
from within the main boom.
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.
turntable – the structure above the rotation bearing which sup-
ports the main boom. The turntable rotates about the centerline of
rotation.
unrestricted rated work load – the maximum designed carrying
capacity of the aerial platform allowed by the manufacturer in all
operating configurations.
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 defined by the horizontal and verti-
cal limits of boom travel that the platform may be positioned in.
working height – platform height plus six feet.