Manitowoc National Crane NBT40-1 Series User Manual

National Crane 3-29-2018 Control # 610-00 3-5
NBT40-1 SERIES OPERATOR MANUAL SAFETY INFORMATION
1
2
3
Carefully follow the procedures in this Operator Manual
when extending or retracting the outriggers. (“Outrigger
Controls” 4-2) Death or serious injury could result from
improper aerial lift setup on outriggers.
Do not swing the superstructure over the side when the
outriggers are not fully extended. Check aerial lift stability.
Ensure the outriggers are firmly positioned on solid surfaces.
Ensure the aerial lift is level before beginning operation.
Outrigger beams and jack cylinders (plus center front
stabilizer, if equipped) must be properly extended and set to
provide precise leveling of the aerial lift. Tires must be clear
of the ground before operation.
Work Site
Prior to any operation, you must inspect the entire work site,
including ground conditions, where the aerial lift will travel
and operate. Be sure that the surfaces will support a load
greater than the aerial lift’s weight and maximum capacity.
Be aware of all conditions that could adversely effect the
stability of the aerial lift.
Wind Forces
Wind can have a significant effect on an aerial lift. (See
“Wind Forces” on page 6.) Wind forces act differently on an
aerial lift depending upon the direction from which the wind is
blowing (for example, wind on the rear of the boom can result
in decreased forward stability, wind on the underside of the
boom can result in decreased backward stability, wind on the
side of the boom can result in structural damages, etc.). To
assist you in determining prevailing wind conditions, refer to
Table 3-1.
Wind forces can exert extreme dynamic loads on the aerial
lift. National Crane recommends that a personnel lift not
be made if the wind can cause a hazard such as
inadequate clearance from a structure or encroachment
of a minimum safe approach distance to a powerline.
National Crane recommends that if the wind speed (velocity)
is in excess of 24 km/hr (15 mph) at the raised platform
height when using the main boom or the jib, operation of the
aerial lift must cease.
Table 3-1 Beaufort Wind Scale
Aerial Lift Operations
Before operation, read and understand this manual.
Never use the aerial lift for any purpose other than
positioning personnel, their tools and equipment. Use of the
aerial lift as a crane is prohibited. See “Safety Precautions -
Crane” 2-1.
Wind Force
Wind Velocity
km/h (mph)
Visible Indicator
Effects of wind as observed on land
Beaufort
Scale
Designation
Zero (0) Calm less than 1 (<1) Calm; smoke rises vertically
1 Light Air 1.1-5.5 (1-3)
Smoke drift indicates wind direction. Leaves and wind vanes
are stationary.
2 Light Breeze 5.6-11 (4-7)
Wind felt on exposed skin. Leaves rustle. Wind vanes begin to
move.
3 Gentle Breeze 12-19 (8-12) Leaves/small twigs constantly moving. Light flags extended.
4
Moderate
Breeze
20-28 (13-17) Dust and loose paper raised. Small branches begin to move.
Reduce equipment load ratings and operating parameters at 32 km/h (20 mph)
5 Fresh Breeze 29-38 (18-24)
Branches of a moderate size move. Small trees in leaf begin to
sway.
6 Strong Breeze 39-49 (25-30)
Large branches in motion. Whistling heard in overhead wires.
Umbrella use becomes difficult. Empty plastic bins tip over.
Cease all craning operations at 48 km/h (30 mph); lower & retract boom
7 Moderate Gale 50-61 (31-38) Whole trees in motion. Effort needed to walk against the wind.
DANGER
Aerial Lift Hazard!
To avoid death or serious injury, never lift a load with hoist
line while operating aerial Lift platform.

Manitowoc National Crane NBT40-1 Series Specifications

General

Brand	Manitowoc
Model	National Crane NBT40-1 Series
Category	Construction Equipment
Language	English