Kato SR-300L, Instruction Manual

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WARNING
(11) Confirmation before lifting the load
Failure to check the following points could result in major
accidents such as dropping the load, damage to the boom or the
crane, or crane tip over.
・
Is the total mass of the load, the slings and the hook to be lifted
below the rated lifting capacity?
・
Is the number of parts of line on the main winding wire rope a
standard number according to the rated lifting capacity chart ?
・
Are the sling wire ropes placed correctly to hoist from above
the load center of gravity ?
・ Is the main winding wire rope hanging vertically ?
・
After the load leaves the ground, pause until it has stopped any
swinging and confirm that it is stable before you continue to
hoist.
(12) Arrange slings securely
If the slings are not fitted securely, the load can fall off or slip
out of the slings and fall down. Arrange slings securely with
attention to the following points.
・
The sling wire ropes or chains used to suspend the load from
the hook should be the right size and undamaged. Damaged
slings could break and drop the load. Arrange the slings so that
they do not interfere or tangle with each other.
・ The hook is fitted with a retainer to prevent the slings from
slipping out. Check that it works correctly. If not, there is the
risk that the slings could slip from the hook causing the load to
fall. So have it repaired or replaced before you proceed with
hoisting.
・ Place protectors of some soft material to protect the sling wire
ropes where they come into contact with corners of the
suspended load or anywhere they are prone to damage.
(13) Consider deflection of the boom when hoisting a load
When a load is lifted, the boom deflects, increasing the working
radius. Particularly when working with a very heavy load or a
long boom, allow an extra margin below the rated lifting
capacity to allow for alteration of the working radius due to
boom deflection under the load.