Warning notices – Snorkel AB48HSRT-sn4611+ User 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%; 30m add 25%
SPECIFICATION FOR USE ON LAND
M/Sec
0
CALM
Calm – smoke rises vertically
0-0.5
1
LIGHT AIR
Direction of wind shown by smoke drift but not by wind
vanes.
0.6-1.5
2
LIGHT BREEZE
Wind felt on faces; leaves rustle; ordinary vanes moved
by wind.
1.6-3.0
3
GENTLE BREEZE
Leaves and small twigs in constant motion; wind
extends light flag.
3.5-5
4
MODERATE BREEZE
Raises dust and loose paper; small branches are
moved.
6-8
5
FRESH BREEZE
Small trees in leaf begin to sway; crested wavelets form
on inland waterways.
9-10
6
STRONG BREEZE
Large branches in motion; umbrellas used with
difficulty.
11-13
7
NEAR GALE
Whole trees in motion; inconvenience felt when walk-
ing against wind.
14-17
8
GALE
Breaks twigs off trees; generally impedes progress.
18-21
9
STRONG GALE
Slight structural damage occurs (chimney pots and
slates removed)
22-24
DESCRIPTION OF WIND
WARNING NOTICES
SECTION
E