National Crane
PUBLISHED 04-26-2019 CONTROL # 113-09
4-7
600E2 OPERATOR MANUAL
SET-UP
4
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
.
Example 2
Assume a load of 9000 lbs (4082 kg) at 10 ft (3.04 m) radius
on the ground beside the truck to be picked up, swung over
and placed on the truck bed at an 8 ft (2.43 m) radius from
the crane. Crane is reeved for single part.
1.
Weight of load and load handling equipment.
2.
Starting Radius = 10 ft (3.04 m)
3.
Ending Radius = 8 ft (2.43 m)
4.
Refer to crane load chart.
The crane capacity at the 10 ft (3.04 m) radius is 18,900 lbs
(8,573 kg). At the 8 ft (2.43 m) radius, the capacity is
19,750 lbs (8,960 kg).
The crane capacity is adequate.
5.
Refer to hoist load chart.
The capacity of a 1 part line is 7700 lbs (3492 kg), which is
less than load to be lifted.
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 extension were being
used on this machine as maximum capacity of the 25 ft (7
m) extension at 40 ft (12.19 m) radius would only be 1900
lbs (862 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 4,300 lbs (1950 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.
Load = 9000 lb (4082 kg)
1 Part Load Block =
150 lb
(68 kg)
Sling =
50 lb
(22 kg)
Total Load = 9200 lb (4173 kg)
Fo
r
Reference
Only
Summary of Contents for National Crane 600E-2
Page 1: ...Operator Manual National Crane 600E 2 F o r R e f e r e n c e O n l y ...
Page 2: ...F o r R e f e r e n c e O n l y ...
Page 10: ...TOC 6 TABLE OF CONTENTS OPERATOR MANUAL 600E2 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Page 121: ...F o r R e f e r e n c e O n l y ...
Page 122: ...F o r R e f e r e n c e O n l y ...
