23
5. Safety precautions
ting process must be safely and visibly cordoned off in
order to avoid the possibility of persons falling.
■
Introducing sawing slurry into the drains or sewage
system without suitable pre-treatment is problematic
from an environmental point of view. Ask the local author-
ity responsible about existing regulations. We recom-
mend the following pre-treatment:
– Collect the sawing slurry (e.g. using an industrial vac-
uum cleaner)
– Allow the slurry to settle and dispose of the solid por-
tion of the waste at a building waste disposal location
(the separation process can be accelerated by adding
a flocculent).
– Neutralise the residual water by adding a neutralising
agent or dilute it by adding a large quantity of water
before allowing it to enter the drainage system.
Use of the equipment as directed, operating
safety
■
The DS WS 15 wire saw has been developed for the
technical demolition of steel, concrete, stone or brick-
work structures in construction and civil engineering
applications. It can be used for wet or dry sawing (the
wet sawing technique is normally used). Use extending
beyond this is considered to be not as directed and
requires to be clarified in advance with the manufacturer.
■
The operator in charge must be aware of the possible
dangers and of his responsibility for safety, both with
regard to himself and to others.
■
The wire saw may be operated only by specialists
trained in concrete cutting techniques, referred to in the
following as “operators”. These persons must be famil-
iar with the content of these operating instructions and
must have been trained in their safe application by a Hilti
specialist.
■
Check that the wire saw and its components , the saw-
ing wire and wire connectors and all accessories are in
good condition and perfect working order before use.
Rectify any damage before sawing commences.
■
Position the control unit as far as possible outside the
danger zone and remain in the vicinity of the control unit
during cutting operations.
■
The drive unit must stand on a solid, level surface.
If positioned on scaffolding, the scaffolding must be
correspondingly stable and the drive unit must be
5.4
secured to prevent it moving or falling. Serious dam-
age or injury can result if the drive unit is allowed to
fall or crash down.
■
Connect the equipment to the electric power supply
only after the wire saw has been fully set up.
■
The protective cover must always be fitted on the drive
unit when the saw is in operation.
■
Persons may enter the danger zone (e.g. to adjust
pulleys or water supply nozzles) only after the drive has
been switched off and when the drive pulley has come
to a standstill. Switch off or disconnect the electric sup-
ply before entering the danger area.
■
Observe the recommended guide values for cutting
speed and advance pressure when sawing.
■
Use only rubber or plastic coated diamond wires
approved for use at a speed of at least 30 m/sec.
■
For safety reasons, always keep the free wire length
as short as possible. This reduces the risk of wire whiplash
in the event of wire breakage.
■
Do not hold anything against the moving diamond
wire by hand, e.g. with a view to using it as an impro-
vised saw.
■
Wire breakages can be reduced considerably by using
high-quality diamond wires and wire connectors (in con-
junction with the appropriate tool for fitting the connec-
tors).
■
An appropriately long wire must be used when dry
sawing, e.g. in masonry. This permits the wire to cool
down during its travel prior to coming into contact with
the workpiece on the next revolution.
■
The wire may become hot, do not touch it without
gloves!
■
Dry sawing may create a great deal of dust, in
which case respiratory protection should be worn.
Содержание DS WS15
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