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Appendix a – glossary – Snorkel TB60 2014 User Manual

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TB60 – 0083739

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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.