TYROLIT Hydrostress HBH534 series, Safety & Operator Manual

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Safety & Operator Manual Hydraulic Hand Saw HBH534***
13 10984829 EN / 28.08.2007
4.3.2 The procedure in detail
4.3.2.1 Obtaining the approval of the supervision of works
Before any work commences the approval of the supervision of works must be obtained.
The following points must be clarified:
• are their static concerns about the building structure?
Action:
If structurally important bearing or support structures are cut through, this may have fatal
consequences (static weakening or subsidence)
• are electrical lines laid in the wall or ceiling (floor)?
Action:
If one or more electricity lines are located in the wall, the ceiling or the floor, it must be
ensured that these have been disconnected and secured against reconnection.
• are sanitation line laid in the wall or ceiling (floor)?
Action:
If sanitary lines (supply or waste pipes for water or waste water) exist, these must first be
drained.
• have loose parts been left in the wall or ceiling (floor)?
Action:
Loose or soft materials cannot be cut. They must therefore be removed first. Otherwise
the result would be that the tool would jam or that individual segment would come away
and be propelled.
• how deeply are any longitudinally running reinforcements?
Action:
If along the cuts to be performed there are reinforcements in the concrete, it is important
to know how deep below the surface these may be located. If instead of the
reinforcements being sawn through, the reinforcements are sawn along, the resultant
heat could make the segments come loose with the result that the cutting tool is
destroyed.
4.3.2.2 Mark out cuts and anchoring holes
The parts to be sawn out are normally already marked out by the customer. It is now a
matter of determining the maximum concrete block weight and adapting to the conditions.
In doing so the following points must be taken into account:
•
it must be possible to adapt the handling to the task
•
the crane or the lifting device must be designed for the loads to be lifted
•
the weight of the structural block cut out should not exceed the maximum permitted
floor loading
4.3.2.3 Define the sequence of cuts
The sequence of cuts is important in order that the cutting tool does not jam later and that
the structural blocks can be removed without problems. When defining the sequence of
cuts express account must also be taken of personal safety issues. In principle, for a wall
cut for example, first the bottom, then the side and only at the end the top cuts must be
performed.