GROVE
2-7
TMS800E13 OPERATOR MANUAL
SAFETY INFORMATION
2
Published 02-06-2014, Control # 495-00
upon the direction from which the wind is blowing (e.g., 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 2-1.
Wind forces can exert extreme dynamic loads.
Manitowoc
recommends that a lift not be made if the wind can cause
a loss of control in handling the load.
Manitowoc
recommends that, if the wind speed (velocity) is between
32 km/h (20 mph) to 48 km/h (30 mph), the load capacities
shall be reduced to account for the size and shape of the
load and the wind direction in relation to the machine for all
boom and boom extension lengths. Further, operation of the
crane in wind velocities over 48 km/h (30 mph) is not
recommended.
Table 2-1 Beaufort Wind Scale
Lifting Operations
Before lifting, position the crane on a firm surface, properly
extend and set the outriggers, and level the crane.
Depending on the nature of the supporting surface,
adequate cribbing may be required to obtain a larger bearing
surface.
The crane is equipped with a bubble level that should be
used to determine whether the crane is level. The load line
can also be used to estimate the levelness of the crane by
checking to be sure it is in-line with the center of the boom at
all points on the swing circle.
If the boom extension, or auxiliary boom nose is to be used,
ensure the electrical cable and the weight for the Anti-Two-
Block Switch are properly installed and the Rated Capacity
Limiter (RCL) is programmed for the crane configuration.
Refer to the RCL operator’s manual supplied with the crane.
Verify the crane’s capacity by checking the
Load Chart
against the weight of the load. Then, lift the load slightly at
first to ensure stability before proceeding with the lift.
Be sure the load is properly rigged and attached. Always
determine the weight of the load before you attempt to lift it
and remember that all rigging (slings, etc.) and lifting devices
(hook block, boom extension, etc.) must be considered part
of the load.
Measure the load radius before making a lift and stay within
approved lifting areas based on the range diagrams and
working area diagrams on the crane’s
Load Chart
.
Always keep the load as near to the crane and as close to
the ground as possible.
Do not overload the crane
by exceeding the capacities
shown on the appropriate
Load Chart
. Death or serious
injury could result from the crane tipping over or failing
structurally from overload.
The crane can tip over or fail structurally if:
•
The load and crane’s configuration is not within the
capacity as shown on the applicable
Load Chart
and
notes.
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 crane 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.
Reference Only
