Putzmeister BSA 1409 D4, Руководство по эксплуатации

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Safetyregulations
240
BP03_082_1901EN
Return the placing boom to the driving position or rest position in
the event of storms or bad weather.
− Placing booms with a vertical reach of 42m or more may only be
operated in winds of up to wind force7(wind speed51km/h).
− Placing booms with a vertical reach of less than 42m may only
be operated in winds of up to wind force8 (wind speed74km/h).
The definitive wind speed is measured at the height of the boom tip.
Wind speeds in accordance with the Beaufort scale are average
wind speeds measured over a period of 10minutes. Higher speed
gusts of wind may occur briefly during the measuring period.
Higher wind speeds jeopardize the stability and safety of the struc
tural elements. There is a risk of lightning strike in a thunderstorm.
Lightning strikes pose a risk of death. The machine and the sur
rounding area will be charged with electricity. Earthing the machine
does not reduce this risk. For this reason, you should fold in the
placing boom if there is a risk of lightning strike.
Tower cranes on construction sites generally have wind speed
measuring equipment, enabling you to find out the wind speed at
any time. If no wind speed measuring equipment is available, you
can ask the nearest meteorological office what the wind speed is, or
estimate the wind speed using the following rule of thumb:
− In winds of force7 and greater, green leaves break from the trees
and there is perceptible resistance when walking against the
wind.
− In winds of force8 and greater, small branches break from trees
and walking outside is significantly impeded.
The boom must not be used in temperatures below minus 15
_
C
(+5
_
F) unless the manufacturer has given express approval. There
is a danger of damage to the steel (brittlefracture) and the seals
throughout the system at such extreme minus temperatures.
In addition, such minus temperatures should be considered the
realistic lower limit for concrete placement, as it is no longer poss
ible to prepare concrete such that it can achieve its strength without
the use of special additives.
2.12.5 Procedure in storms
2.12.6 Concreting in cold
weather