Snorkel TB50 - Manual (Page 79)

TB42/TB50 – 0074923 75
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 environ-
ment.
ammeter – an instrument for measuring the strength of an electric current
in amperes.
authorized personnel – personnel approved as assigned to perform
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 mobility 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 sup-
ported 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.
guardrail system – a vertical barrier around the platform to prevent
personnel from falling.
hazardous location – any location that contains, or has the potential to
contain, an explosive or flammable atmosphere as defined by ANSI/NFPA
505.
intermediate boom – a telescopic boom section that extends and retracts
from within the main boom. The intermediate boom is between the base,
or lower most section of the main boom, and the tip boom.
l evel 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.
l ower 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 ad-
verse 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 regu-
lations.
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 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 floor of the
platform to the surface upon which the chassis is being supported.
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, experience
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. The tip boom is nearest the platform.
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 supports the
main boom. The turntable rotates about the centerline of rotation.
unrestricted rated work load – the maximum designed carrying capac-
ity 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 vertical limits
of boom travel that the platform may be positioned in.
working height – platform height plus six feet.