SET-UP OPERATOR MANUAL 500E2
4-6 Published 07-26-2019 Control # 111-06
Freely Suspended Load
Load hanging free with no direct external force applied
except by the loadline.
Side Load
Horizontal side force applied to the lifted load either on the
ground or in the air.
Boom Length
Length of the boom, from boom pivot pin to wire rope on last
main boom section. A decal on either side of the boom
shows when certain boom lengths are reached. The letters
on the intermediate boom lengths correspond to the letters
on the load chart.
Range Diagram
Corresponds to the pictorial in the load chart. The chart
shows the operating radius and height of the unloaded boom
tip at all boom lengths and angles. The chart should be used
as a guide to position unloaded loadline and to determine
approximate height to which the load can be lifted.
DETERMINING LOAD CAPABILITY
The following procedure is a typical method which must be
used to determine the crane’s ability to handle a load. The
crane is equipped with a standard hoist:
1. Determine the weight of the load and load handling
equipment.
2. Determine the radius from center line of crane rotation to
position of load.
3. Determine the radius from centerline of crane rotation to
center of point where load is being moved to.
4. Refer to load chart for crane and determine that load and
radius of lifting are within capacity of crane.
5. Refer to load chart to determine correct hoist reeving.
Load Determination Examples
The following examples are for illustrative purposes only.
The load chart ratings, component weights and dimensional
data may not be the same as the actual unit. Always use
actual information from the crane and job site when planning
a lift.
Example 1
A load is to be lifted from the ground and weighs 2300 lbs
(1043 kg) at a radius of 10 ft (3.04 m). The load will be placed
on the roof of a building at a radius of 40 ft (12.19 m) and a
height of 40 ft (12.19 m) above the ground on the opposite
side of the truck.
1. Determine the load.
2. Starting Radius =10 ft (3.04 m)
3. Ending Radius = 40 ft (12.19 m)
4. Refer to crane load chart.
Starting point: Assuming the boom is fully retracted [27 ft'
(8.23 m) boom length], the capacity at a 10 ft (3.04 m) radius
is 18,900 lbs (8,573kg).
In order to get the load on the roof, the load must be:
• hoisted from the ground
• swung around the rear of the truck (dead spot in rotation
is over the cab)
• boom extended to 62 ft (18.90 m) extension
• load hoisted to a height that will clear the top of the
building
• boom rotated to the point load is to be placed
• boom tip lowered to 40 ft (12.19 m) radius
• load lowered to building roof.
Ending Point: The load rating at the ending point is 3950 lbs
(1792 kg). The boom will be at 62 ft (18.90m) extension and
the loaded radius is 40 ft (12.19 m).
• The crane has enough capacity at each end of the lift to
allow the lift to be made.
• Refer to hoist load chart. Crane is reeved for single part
line.
• Allowable load for single part lines 7700 lbs (3492 kg)
well above the 2480 lbs (1124 kg) to be lifted.
• Operator should now proceed to lift the load as smoothly
as possible
.
Load = 2300 lb (1043 kg)
1 Part Load Block = 150 lb (68 kg)
Sling = 30 lb (14 kg)
Total Load = 2480 lb (1125 kg)
CAUTION
This load could not be lifted if the jib were being used on
this machine as maximum capacity of the 23 ft (7 m) jib at
40 ft (12.19 m) radius would only be 1800 lbs (816 kg) at
65°. The capacities remain the same even with the boom
retracted.
The hoist in this example can lift 7700 lbs (3492 kg) while
the boom is only able to withstand 3950 lbs (1792 kg) at
40 ft (12.19 m) radius. Therefore, one could easily
damage the crane by attempting to pull until the hoist
stops with a heavier load.
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