Trailer Crane AHK 30/1400
Operation
02/2008
117
7.4 Movement of load
Pos : 7.24 /Kothes! Networ k/Boeker/Bedienung/Bewegen der Last AH K EU Böc ker @ 26\mod_1166701583000_1.doc @ 287282
(a)
The person guiding the lifting procedure must ensure that
(1) the crane is in a proper upright position and locked, if required.
(2) the load is properly secured and aligned with the slings or take-ups before it is
lifted by just a few inches above the ground (test run).
(3) the lifting and rotating path is free of obstacles.
(4) all persons are standing outside the turning radius of the crane counterweight.
(b)
Before lifting the load, ensure that
(1) the lifting cable is not kinked.
(2) cables consisting of several subsections are not twisted around each other.
(3) the hook is attached above the load in such a way that the sway is kept to a
minimum.
(4) If there are slack cable sections, check whether the cable is properly wound in
the cable drums.
(5) Check the effect of the wind on the site on the load as well as the stability of the
crane.
(c)
When lifting goods, ensure that
(1) there are no jerking movements such as sudden acceleration or braking of the
load.
(2) the load or other parts of the crane cannot collide with any obstacles.
(d)
the lateral load on the booms is limited to freely suspended loads; never use cranes
to pull loads along the ground.
(e)
the operator does not move loads above people.
(f)
with mobile cranes, it is forbidden to move loads over the front section of the vehicle,
unless agreed with the crane manufacturer.
(g)
the crane operator must test the brakes each time a load that is close to the nominal
load is lifted; to carry out such a test, the load must be lifted a few inches above the
ground and the brake must be applied.
(h)
where claws are used, they must be extended in accordance with the load/capacity
specifications of the manufacturer; alternatively, the crane must be installed in such a
way that the weight of the crane is fully borne by the wheels (not with rail cranes).
(i)
the load or the boom are not lowered below the point at which there are less than two
full cable windings in the respective drum.
(k)
where one or more cranes are used to lift one load, one person is appointed as being
responsible for the manoeuvre; this person must first assess the task and then
instruct the personnel involved in the manoeuvre in the correct positioning and guying
of the load and the planned movements. Decisions, for example in relation to the
need for reducing the capacity of the crane, load and boom position, support on the
ground and speed of movement, etc. must be taken on the basis of this analysis.