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(lines)
|
Hoist
|
Number
of lines of rope supporting the load block or hook.
(ASME HST-4M-1991)
|
Patented
track
|
Bridge
Crane
|
A
generic term referring to crane and monorail equipment built
in accordance with the MMA specification utilizing a composite
track section incorporating a proprietary bottom flange shape.
(CMAA Spec 74)
|
Pawl
|
Hoist
|
A
device for holding the machinery against undesired rotation
by engaging a ratchet.
(ASME B30-16-1993)
|
Peel-off
|
Below
hook device
|
A
prying action which takes place when deflection of an overhanging
load exceeds the compensating ability of the vacuum pad or vacuum
lifting device resulting in loss of load.
(ASME B30.20-1985)
|
Pendant
pushbutton station
|
Bridge
Crane
&
Hoist
|
Means
suspended from the crane operating the Bridge Crane Controllers
from the floor or other level beneath the crane. (CMAA Spec.
70)
|
Pitch
diameter
|
Hoist
|
The
distance from center to center of a rope passing over a sheave
or wound on a drum, measured across the diameter of the sheave
or drum power transmission parts the power transmission parts
of the hoist are the machinery components, including the gears,
shafts, clutches, couplings, bearings, motors, and brakes.
(ASME HST-4M-1991)
|
Pitch
diameter (rope)
|
Hoist
|
Distance
through the center of ~ drum or sheave from center to center
of a rope passed about the periphery. (CMAA Spec. 70)
|
Plain
reversing Bridge Crane Control
|
Bridge
Crane
&
Hoist
|
A
reversing Bridge Crane Control which has identical characteristics
for both directions of motor rotation. (CMAA Spec. 70)
|
Plugging
|
Bridge
Crane Control
|
A
Bridge Crane Control function which accomplishes braking by reversing
the motor line voltage polarity or phase sequence. (CMAA Spec.
70)
|
Plugging
relay
|
Bridge
Crane Control
|
A
current relay used on a bridge or trolley Bridge Crane Control
panel which senses current in the motor secondary circuit of
an alternating current motor and limits reverse torque of the
motor to the first Bridge Crane Control point until the motor
rotation has stopped. In a direct current Bridge Crane Control
panel, the relay performs the same function by establishing a
patented sensing circuit at the motor
armature. (Sometimes called an anti- plugging relay.) (WCH)
|
Primary
upper limit device
|
Hoist
|
The
first device that, when actuated, limits hoisting motion in the
upward direction.
(ASME B30.2-1990)
Important,
this is not to be used as a operational limit switch.
|
Process
crane
|
Bridge
Crane
|
|
Protective
panel
|
Bridge
Crane Control
|
An
assembly containing overload and undervoltage protection for
all crane motions. (CMAA Spec. 70)
|
Pulpit
Bridge Crane Controlled
|
Bridge
Crane
&
Monorail
|
A
unit operated from a fixed operator station not attached to the
crane. Pushbutton Station. A device consisting of pushbutton
operated contacts in an enclosure used by the
operator for Bridge Crane Control of the powered motions of the
crane, hoist, and other auxiliary equipment. (ANSI MH 27.1-1981)
|
Push
button station
|
Hoist
|
An
electrical Bridge Crane Control device, consisting of push button
operated contacts, used by the operator for the Bridge Crane
Control of the powered motions of the crane, hoist, and other
auxiliary equipment.
(ASME B30-17)
|
Qualified
person
|
Regulatory
|
A
person who, by possession of a recognized degree or certificate
of professional standing or by extensive knowledge, training,
and experience, has successfully demonstrated the ability to
solve or resolve problems relating to the subject matter and
work. (ASME B30-17)
|
Radio
Bridge Crane Controlled
|
Bridge
Crane Control
|
A
unit operated from a radio transmitter located at a point not
mechanically attached to the device being Bridge Crane Controlled.
(ANSI MH 27.1-1981)
|
Rail
sweep
|
Bridge
Crane
|
A
device attached to the crane and located in front of the crane’s
leading wheels to push aside loose obstructions.
(ASME B30-17)
|
Rail,
bridge
|
Bridge
Crane
|
The
track supported by the bridge girder(s), on which the trolley
travels. (WCH)
|
Rail,
runway
|
Runway
|
The
track supported by the runway beams, on which the crane travels.
(WCH)
|
Rated
load (capacity)
|
Bridge
Crane
&
Hoist
|
The
maximum load designated by the manufacturer for which a crane
or individual hoist is designed and built.
(ASME B30.2-1990)
|
Reach
|
Hoist
|
Reach
is equal to lift plus headroom. (ASME HST-4M-1991)
|
Reeving
|
Hoist
|
The
reeving of the hoist is the path of the rope between the hoist
and the load block
— (a)
double reeving two parts of line leading off of the drum (see Fig.
2).
— (b)
single reeving one part of the line leading off of the drum (see
Fig. 2).
(ASME HST-4M-1991)
|
Regenerative
braking means
|
Hoist
|
A
method of Bridge Crane Controlling speed in which the electrical
energy generated by the motor is fed back into the power system
rope refers to wire rope unless otherwise specified.
(ASME HST-4M-1991)
|
Regulated
speed
|
Bridge
Crane
&
Hoist
|
A
function which tends to maintain constant motor speed for any
load for a given speed setting of the Bridge Crane Controller.
(CMAA Spec. 70)
|
Remote
Bridge Crane Controlled
|
Bridge
Crane Control
|
A
unit operated from a Bridge Crane Control station located at
a point not mechanically attached to the device being Bridge
Crane Controlled. (ANSI MH 27.1-1981)
|
Righthand
end
|
Bridge
Crane
|
A
reference to parts or dimensions on the viewer’s right of the
centerline of span, established when facing the drive girder
side of the crane. (WCH)
|
Rope
|
Hoist
|
Refers
to wire rope unless otherwise specified.
(ASME B30-17)
|
Rope
drum
|
Hoist
|
The
cylindrical member around which the rope is wound for lifting
and lowering the load.
(ASME HST-4M-1991)
|
Rope
sheave
|
Hoist
|
A
grooved wheel used with a rope to change direction and point
of application of a pulling force. (ASME HST-4M-1991)
|
Rotary
switch
|
Monorail
|
A
track switch with a movable inner frame containing straight
and/or curve sections of track. The inner frame can be rotated
around a vertical axis to align these tracks with other tracks
for routing carriers from one track to another. (ANSI MH 27.1-1981)
|
Rotating
axle
|
Bridge
Crane
|
An
axle which rotates with the wheel.(CMAA Spec. 70)
|
Running
sheave
|
Hoist
|
A
sheave that rotates as the hook is lifted or lowered.
(ASME HST-4M-1991)
|
Runway
|
Runway
|
The
rails, beams, brackets and framework on which the crane operates.
(CMAA Spec. 70)
|
Runway
conductors
|
Runway
|
The
main conductors mounted on or parallel to the runway which supplies
current to the crane. (CMAA Spec. 70)
|
Runway
rail
|
Runway
|
The
rail supported by the runway beams on which the bridge travels.
(CMAA Spec. 70)
|
S
section
|
Bridge
Crane
&
Runway
|
A
standard beam shape as defined by the American Institute of Steel
Construction. (CMAA Spec. 74)
|
Safety
lug
|
Bridge
Crane
|
A
mechanical device fixed securely to the end truck or trolley
yoke which will limit the fall of the crane or carrier in case
of wheel or axle failure. (CMAA Spec. 74)
|
Service
platform
|
Bridge
Crane
|
A
means provided for workers to perform maintenance, inspections,
adjustments, and repairs of cranes
(ASME B30-17)
|
Service,
heavy
|
Bridge
Crane
&
Hoist
|
That
service which involves operation within the rated load limit
which exceeds normal service.
(ASME B30-16-1993)
|
Service,
normal
|
Bridge
Crane
&
Hoist
|
That
distributed service which involves operation with randomly distributed
loads within the rated load limit, or uniform loads less than
65% of rated load for not more than
15% of the time for manually operated hoists, and 25% of the time
for electric-or air-powered hoists.
(ASME B30-16-1993)
|
Service,
severe
|
Bridge
Crane
&
Hoist
|
That
service which involves normal or heavy service with abnormal
operating conditions.
(ASME B30-16-1993)
|
Shall
|
Regulatory
|
This
word indicates that a rule is mandatory and must be followed.
(ASME B30.2-1990)
|
Shear
breakaway force
|
Below
hook device
|
The
external force that is required to separate or slide the vacuum
pad or vacuum lifting device on the load when the force is applied
parallel to the attached load surface. (ASME B30.20-1985)
|
Sheave
|
Hoist
|
A
grooved wheel or pulley used with a rope or chain to change direction
and point of application of a pulling force. (CMAA Spec. 70)
|
Sheave,
running
|
Hoist
|
A
sheave which rotates as the load block is lifted or lowered.
(ASME B30-16-1993)
|
Sheave;
nonrunning (equalizer)
|
Hoist
|
A
sheave used to equalize tension in opposite parts of the rope.
Because of its slight movement, it is not termed a running
sheave. .
(ASME B30.2-1990)
|
Should
|
Regulatory
|
This
word indicates that a rule is a recommendation, the advisability
of which depends on the facts in each situation.
(ASME B30.2-1990)
|
Side
pull
|
Hoist
|
The
component of the hoist pull acting horizontally when the hoist
lines are not operated vertically.
(ASME B30-17)
|
Simple
beam
|
General
|
A
structural member supported and unrestrained at each end and
subjected to loads acting transversely to its longitudinal axis.
(ANSI MH 27.1-1981)
|
Single
reeved
|
Hoist
|
|
Skeleton
cab
|
Bridge
Crane
|
Same
as dummy cab. (CMAA Spec. 70)
|
Skewing
forces
|
Bridge
Crane
|
Lateral
forces on the bridge truck wheels caused by the bridge girders
not running perpendicular to the runways. Some normal skewing
occurs in all bridges. (CMAA Spec. 70)
|
Span
|
Bridge
Crane
|
The
horizontal distance center-to-center of runway rails. (CMAA Spec.
70)
|
Splice
|
Bridge
Crane
&
Monorail
|
A
mechanical device used to join the adjacent ends of track sections.
(ASME B30.11-1993)
|
Spring
return
|
Bridge
Crane Control
|
A
device used on a manual Bridge Crane Controller, master switch,
or pushbutton to cause the unit to return automatically to the
neutral position, when released by the operator. (WCH)
|
Sprocket,
idle
|
Hoist
|
A
freely rotating device that changes the direction of the load
chain.
(ASME B30-16-1993)
|
Sprocket.
Load
|
Hoist
|
A
hoist component that transmits motion to the load chain. This
component is sometimes called load wheel, load sheave, pocket
wheel, or chain wheel.
(ASME B30-16-1993)
|
Spur
track
|
Monorail
|
A
fixed track arranged to interlock with an adjacent crane girder
to permit passage of carriers from the spur track to the crane,
and vice versa.
(ASME B30.11-1993)
|
Squaring
shaft
|
Bridge
Crane
|
A
driven shaft which transmits torque to drive wheels operating
on two or more tracks. (ANSI MH 27.1-1981)
|
Standby
equipment
|
Bridge
Crane
&
Hoist
|
Equipment
that is not in regular service but which is used occasionally
or intermittently as required.
(ASME B30.11-1993)
|
Static
Bridge Crane Control
|
Bridge
Crane Control
|
A
method of switching electrical circuits without the use of contacts.
(CMAA Spec. 70)
|
Stationary
track.
|
|
A
fixed track attached to the building or supporting structure.
(ANSI MH 27.1-1981)
|
Stepless
Bridge Crane Control
|
Bridge
Crane Control
|
A
type of Bridge Crane Control system with infinite speed Bridge
Crane Control between minimum speed and full speed. (CMAA Spec.
70)
|
Stepped
Bridge Crane Control
|
Bridge
Crane Control
|
A
type of Bridge Crane Control system with fixed speed points.
(CMAA Spec. 70)
|
Stop
|
Runway
|
A
device to limit travel of a trolley or crane bridge. This device
normally is attached to a fixed structure and normally does not
have energy absorbing ability. (ASME B30-17)
|
Strength,
average ultimate
|
General
|
The
average tensile force per unit of cross sectional area required
to rupture the material as determined by test. (CMAA Spec. 70)
|
Stress
|
General
|
Load
or force per unit area tending to deform the material usually
expressed in pound per square inch. (CMAA Spec. 74)
|
Stripper
|
Hoist
|
A
device that aids the load chain in leaving the load sprocket. (ASME
B30-16-1993)
|
Structural
lifting device
|
Below
hook device
|
A lifter
consisting of an assembly of rigid parts designed to hold and
attach a load to a hoistway device.
(ASME B30.20-1985)
|
Structural
supports
|
Runways
|
Structural
members provided for the support of runways or monorail track
and switches. (ANSI MH 27.1-1981)
|
Supporting
lift
|
Below
hook device
|
A lifter
that carries the load on rigid projection(s) or bearing surface(s)
(see Figs. 2 through 14).
(ASME B30.20-1985)
|
Supporting
structure.
|
Runways
|
The
structure used for the support of a monorail or crane system.
(ANSI MH 27.1-1981)
|
Suspension
fittings
|
Bridge
Cranes
&
Hoist
|
Fittings
used to attach the track to the supporting structure. (ANSI MH
27.1-1981)
|
Sweep
|
Bridge
Crane
&
Runway
|
Maximum
lateral deviation from straightness of a structural member, measured
at right angles to the Y-Y axis. (CMAA Spec. 70)
|
Switch,
cross-track
|
Monorail
|
A
track switch containing one straight section of track, pivoted
about the center, which can be rotated to align with other crossing
tracks to allow passage of the carrier
through the junction without changing the direction of the carrier
motion.
(ASME B30.11-1993)
|
Switch,
emergency stop
|
Bridge
Crane Control
|
A
manually actuated switch to disconnect power independently of
the regular operating Bridge Crane Controls.
(ASME B30-17)
|
Switch,
glide (slide)
|
Monorail
|
A
track switch with a movable inner frame containing straight or
curved sections of track. The inner frame can be moved to align
these sections of track with other fixed
tracks to permit routing of carriers.
(ASME B30.11-1993)
|
Switch,
limit
|
Bridge
Crane Control
|
A
device that is actuated by the motion of a part of a power-driven
machine or equipment to alter or disconnect the electric, hydraulic,
or pneumatic circuit associated with
the machine or equipment.
(ASME B30-17)
|
Switch,
main (crane disconnect)
|
Bridge
Crane Control
|
A
switch on the crane Bridge Crane Controlling the main power supply
from the runway conductors.
(ASME B30-17)
|
Switch,
master
|
Bridge
Crane Control
|
Switch
that dominates the operation of contactors, relays, or other
remotely operated devices.
(ASME B30-17)
|
Switch,
master, spring-return
|
Bridge
Crane Control
|
A
master switch that when released will return automatically to
a neutral (OFF) position.
(ASME B30-17)
|
Switch,
runway disconnect
|
Bridge
Crane Control
|
A
switch, usually at floor level, Bridge Crane Controlling the
main power supply to the runway conductors.
(ASME B30-17)
|
Switch,
tongue
|
Monorail
|
A
track switch containing one straight section of track, pivoted
at one end, which can be swung to various positions to connect
with fixed tracks for routing of
carriers.
(ASME B30.11-1993)
|
Switch,
track
|
Monorail
|
A
device with a moving section of track that can be moved to permit
passage of a carrier from incoming fixed track(s) to outgoing
fixed track(s).
(ASME B30.11-1993)
|









