Snorkel AB48HSRT-sn4701+ - Manual (Page 12)

10
9. DO NOT move the machine
with the basket raised and
never allow cage or booms to
slew into the path of
oncoming vehicles.
10. DO NOT operate the machine if the wind speed exceeds 12.5 m/s. Be aware
that, when working near high buildings or structures, shielding and
funnelling effects may cause high wind forces on days when the nominal
wind speed in the open is low. Wind speed can either be measured from
the work platform with a hand held anemometer or estimated using the
Beaufort Scale.
BEAUFORT WIND SPEED SCALE
The Beaufort Scale of wind force is accepted internationally and is used in communicating
weather conditions. It consists of numbers 0 - 12, each representing a certain strength of
velocity of wind at 10m (33ft.) above ground in the open.
Numbers 10-12are not shown in this table.
Approximate corrections for wind speeds at other heights are:
2m subtract 30%;
3m subtract 20%;
6m subtract 10%
15m add 10%;
WARNING NOTICES
Beaufort
Scale
M/Sec Ground Conditions
3 3.5-5 Leaves and small twigs in constant motion; wind extends light flag.
4 6-8 Raises dust and loose paper; small branches are moved.
5 9-10 Small trees in leaf begin to sway; crested wavelets on inland waterways.
6 11-13 Large branches in motion; umbrellas used with difficulty.
7 14-17 Whole trees in motion; inconvenience felt when walking against wind.
8 18-21 Breaks twigs off trees; generally impedes progress.
9 22-24 Slight structural damage occurs (chimney pots and slates removed)