
QAY220 All Terrain Crane Operation Manual
1-6
1-8 Operation under special working conditions
Safe distance D is measured from the
foot of the trench T and depends on the
specific site conditions.
1-8-1 Slopes and trenches
The crane must not be set up too close to
slopes or trenches, and depending on the type
of soil, a safe distance must always be kept
from them.
•
Soft or backfilled soil: D2=2
×
T;
•
Hard or grown soil: D1=T
1-8-2 Working near transmitters
If there is a transmitter near the job site, strong electro-magnetic fields may exist. In any case,
before working with the crane near transmitters, contact related representative or consult a high
frequency specialist. These electro-magnetic fields can pose direct or indirect danger to persons or
objects, for example:
•
Effect on human organs due to temperature increase;
•
Danger of burns or inflammation due to temperature increase;
•
Spark or electric arc formation;
•
Effect on LMI and other electric components of the crane due to electro-magnetic interference.
The high frequency rays from a transmitter require an increased working protection and special
guidelines for crane operator and crane personnel.
1. Every crane must be
“
totally
”
grounded. Check visually or with a simple tester to ensure that
ladder and cab, etc. are grounded;
2. All persons working on the crane or on larger metal parts must carry special protective gloves
without metal connectors and suitable protective suits to protect them from burns while working;
3. When moving the crane, do not allow it to touch other crane loads. Since burn nicks reduce the
load carrying capacity of the cables significantly, contact your supervisor any time such a contact has
occurred, so that the cables can be checked and inspected;
General safe operating practices
Chapter 1
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