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Tagline |
Bridge
Crane
Electrical |
An
electrical
conductor
system
employing
flexible
cables.
(ANSI
MH
27.1-1981) |
|
Technical lifting
device |
Below
hook
device |
A
mechanism
composed
of
two
or
more
rigid
parts
which
move
with
respect
to
each
other
for
attaching
a
load
to a
hoisting
device.
(ASME
B30.20-1985) |
|
TENC |
Bridge
Crane
Control |
Totally
enclosed
fan
cooled.
(CMAA
Spec.
70) |
|
TENV |
Bridge
Crane
Control |
Totally
enclosed
non
ventilated.
(CMAA
Spec.
70) |
|
Test, application
breakaway
force |
Below
hook
device |
A
test
that
is
carried
out
in
accordance
with
instructions
from
the
manufacturer
of
the
lifting
magnet
in
order
to
establish
the
application
breakaway
force.
(ASME
B30.20-1985) |
|
Test, rated breakaway
force |
Below
hook
device |
A
test
that
is
carried
out
per
para.
20-3.3.2(b)(2)
in
order
to
establish
the
rated
breakaway
force.
(ASME
B30.20-1985) |
|
Tongue switch. |
Monorail |
A
switch
that
contains
one
straight
section
of
track,
pivoted
at
one
end,
which
can
be
swung
to
various
positions
to
connect
with
other
tracks
for
transfer
of
carriers
from
one
to
the
other.
(ANSI
MH
27.1-1981) |
|
Top running crane |
Bridge
Crane |
An
electric
overhead
traveling
crane
having
the
end
trucks
supported
on
rails
attached
to
the
top
of
the
crane
runway.(CMAA
Spec.
74) |
|
Torque, full load
(motor) |
Bridge
Crane
Control |
The
torque
produced
by a
motor
operating
at
its
rated
horsepower
and
speed.
(CMAA
Spec.
70) |
|
Torque, locked
rotor |
Bridge
Crane
Control |
The
minimum
torque
which
a
squirrel-
cage
motor
will
develop
at
rest,
for
all
angular
positions
of
the
rotor,
with
rated
voltage
applied
at
rated
frequency.
Not
applicable
to
wound-rotor
(slip-ring)
motors.
(WCH) |
|
Torque, motor
breakdown |
Bridge
Crane
Control |
The
maximum
torque
which
a
squirrel-cage
or
wound-rotor
(slip-ring)
motor
will
develop
with
rated
voltage
applied
at
rated
frequency,
without
an
abrupt
drop
in
speed.
(WCH) |
|
Torque, motor
full
load |
Bridge
Crane
Control |
The
torque
developed
by an
electric
motor
(A.C.
or
D.C.)
to
produce
its
rated
horsepower
at
rated
full
load
speed.
(WCH) |
|
Torque, motor
pull
up |
Bridge
Crane
Control |
The
minimum
torque
developed
by a
squirrel
cage
or
wound
rotor
(slip-ring)
motor
during
the
period
of
acceleration
from
rest
to
the
speed
at
which
breakdown
torque
occurs.
For
squirrel
cage
motors
with
8% or
greater
slip,
the
pull
up
torque,
the
breakdown
torque,
and
the
starting
torque
are
all
equal
and
occur
at
zero
speed.
(WCH) |
|
Torsional box
girder |
Bridge
Crane |
Girder
in
which
the
trolley
rail
is
located
over
one
web.
(CMAA
Spec.
70) |
|
Torsional forces |
Bridge
Crane |
Forces
which
can
cause
twisting
of a
member.
(CMAA
Spec.
70) |
|
Track
|
Monorail |
The
structural
member
that
supports
the
carrier
or
crane
wheels.
(ASME
B30.11-1993) |
|
Track capacity. |
Bridge
Crane
&
Monorail |
The
design
load
which
consists
of
the
rated
load,
impact
allowance
and
load
imposed
by
the
weight
of
the
equipment.(ANSI
MH
27.1-1981) |
|
Track curves
|
Monorail |
Curved
sections
of
monorail
track
used
to
change
the
direction
of
carrier
travel.
(ASME
B30.11-1993) |
|
Track hangers
|
Monorail |
Fittings
used
to
suspend
the
track
from
the
supporting
structure.
(ASME
B30.11-1993) |
|
Track joint
|
Monorail |
The
point
at
which
two
sections
of
track
are
joined
together. (ASME
B30.11-1993) |
|
Track joint |
|
The
point
at
which
two
sections
of
track
are
joined
together.
(ANSI
MH
27.1-1981) |
|
Track opener
|
Monorail |
A
section
of
monorail
track
arranged
to
lift
or
swing
out
of
line
to
make
an
opening
through
which
a
door
may
pass.
(ASME
B30.11-1993) |
|
Tractor drive |
Bridge
Crane
&
Monorail |
A
motordriven
unit
supported
from
wheels
and
propelled
by
drive
wheel
or
wheels
bearing
on
the
underside
of
the
track.
(ANSI
MH
27.1-1981) |
|
Trolley |
Hoist |
A
wheeled
mechanism
from
which
a
hoist
is
suspended
to
provide
horizontal
motion
of
the
hoist
along
a
beam.
(ASME
HST-4M-1991) |
|
Trolley |
|
See
Carrier.
|
|
Trolley (carrier) |
Hoist |
The
unit
which
travels
on
the
bottom
flange
of
the
bridge
girder
and
carries
the
hoist.
(ASME
B30-17) |
|
Trolley frame |
Hoist |
The
basic
structure
of
the
trolley
on
which
are
mounted
the
hoisting
and
traversing
mechanisms.
(CMAA
Spec.
70) |
|
Trolley speed |
Hoist |
Trolley
speed
is
the
rate
of
motion
that
a
motor
operated
trolley
(and
hoist)
attains
while
traveling
along
a
beam.
(ASME
HST-4M-1991) |
|
Trolley suspended
|
Hoist |
Suspension
of
hoist
from
a
trolley.
Hoist
can
be
connected
to
trolley
by
hook,
clevis,
or
lug
suspension,
or
the
hoist
can
be
integral
with
trolley.
(ASME
HST-4M-1991) |
|
Trolley travel |
Hoist |
The
trolley
movement
in
directions
at
right
angles
to
the
crane
runway.
(ASME
B30-17) |
|
Truck |
Bridge
Crane |
A
unit
consisting
of a
frame,
wheels,
bearings,
and
axles
that
supports
the
bridge
girders,
the
end
ties
of an
overhead
crane,
or
the
sill
of a
gantry
crane
unattended
a
condition
in
which
the
operator
of a
crane
is
not
at
the
operating
Bridge
Crane
Control
devices.
However,
on a
floor-operated
crane,
if
the
operating
Bridge
Crane
Control
devices
are
within
sight
of
the
operator
and
within
a
distance
equal
to
the
span
of
the
crane,
the
crane.
e
should
be
considered
attended.
(ASME
B30.2-1990) |
|
True vertical
lift |
Hoist |
In
true
vertical
lift,
the
load
hook
travels
in a
true
vertical
path
between
the
lower
limit
of
lift
and
the
upper
limit
of
lift.
(ASME
HST-4M-1991) |
|
Turntable
|
Monorail |
A
track
device
with
a
movable
inner
frame
containing
a
straight
section
of
track
which
can
be
rotated
with
a
loaded
carrier
on it
to
align
the
section
of
track
with
other
tracks
for
the
transfer
of
carriers
from
one
track
to
another.
(ASME
B30.11-1993) |
|
Two blocking |
Hoist |
Condition
under
which
the
load
block
or
load
suspended
from
the
hook
becomes
jammed
against
the
crane
structure
preventing
further
winding
up of
the
hoist
drum.
(CMAA
Spec.
70) |
|
Under running
crane |
Bridge
Crane |
An
electric
overhead
traveling
crane
having
the
end
trucks
supported
on
track
attached
to
the
bottom
flanges
of
the
beams;
or
supported
on
bottom
flanges
of
beams.
These
beams
make
up
the
crane
runway.
(CMAA
Spec.
74) |
|
Undervoltage
protection |
Bridge
Crane
Control |
A
device
operative
on
the
reduction
or
failure
of
voltage
to
cause
and
maintain
the
interruption
of
power
in
the
main
circuit.
(CMAA
Spec.
70) |
|
Upper block |
Hoist |
A
fixed
block
located
on a
trolley
that,
through
a
system
of
sheaves,
bearings,
pins,
and
frame,
supports
the
load
block
and
its
load.
(ASME
B30.2-1990) |
|
Vacuum |
Below
hook
device |
—
pressure
less
than
ambient
atmospheric
pressure.
(ASME
B30.20-1985) |
|
Vacuum lifter |
Below
hook
device |
— a
below-the-hook
lifting
device
for
lifting
and
transporting
loads
in a
fixed
attitude
using
a
holding
force
by
means
of
vacuum.
(ASME
B30.20-1985) |
|
Vacuum manipulator |
Below
hook
device |
A
vacuum
lifter
capable
of
repositioning
the
load
while
suspended.
(ASME
B30.20-1985) |
|
Vacuum pad |
Below
hook
device |
A
device
which
applies
a
holding
force
on
the
load
by
means
of
vacuum.
(ASME
B30.20-1985) |
|
Vacuum reservoir |
Below
hook
device |
The
evacuated
portion
of
the
vacuum
system
whose
function
is to
compensate
for
leakage
into
the
vacuum
system
or to
provide
a
vacuum
reserve
in
event
of
vacuum
generator
failure.
(ASME
B30.20-1985) |
|
Variable frequency |
Bridge
Crane
Control |
A
method
of
Bridge
Crane
Control
by
which
the
motor
supply
voltage
and
frequency
can
be
adjusted.
(CMAA
Spec.
70) |
|
Vertical lift |
Below
hook
device |
A
condition
where
the
surface
to
which
a
vacuum
pad
is
attached
is in
a
vertical
plane.
(ASME
B30.20-1985) |
|
Voltage drop |
Bridge
Crane
Control |
The
loss
of
voltage
in an
electric
conductor
between
supply
tap
and
load
tap.
(CMAA
Spec.
70) |
|
W section |
Bridge
Crane
&
Runway |
A
wide
flange
beam
shape
as
defined
by
the
American
Institute
of
Steel
Construction.
(CMAA
Spec.
74) |
|
Wall mounted
|
Hoist |
A
type
of
hoist
mounting
in
which
the
hoist
is
mounted
to a
vertical
surface. (ASME
HST-4M-1991) |
|
Web plate |
Bridge
Crane |
The
vertical
plate
connecting
the
upper
and
lower
flanges
or
cover
plates
of a
girder.
(CMAA
Spec.
70) |
|
Wheel load |
Bridge
Crane
&
Runway |
The
load
without
impact
on
any
wheel
with
the
trolley
and
lifted
load
(rated
capacity)
positioned
on
the
bridge
to
give
maximum
loading.
(CMAA
Spec.
70) |
|
Wheel yoke |
Bridge
Crane
&
Monorail |
A
frame
on
which
a
pair
of
carrier
(trolley)
wheels
are
mounted.
(ANSI
MH
27.1-1981) |
|
Wheelbase |
Bridge
Crane |
Distance
from
center-to-center
of
outermost
wheels.
(CMAA
Spec.
70) |