Snorkel TL37-sn7000+V-1 - Manual (Page 14)

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8. DO NOT operate the machine unless all four outriggers are down and in full contact
with the ground. The machine must be level and the wheels lifted visibly clear of the
surface before the booms are raised.
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.
DESCRIPTION OF WIND 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 walking
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
Approximate corrections for wind speeds at other heights are:
2m subtract 30%; 3m subtract 20%; 6m subtract 10%
15m add 10%; 30m add 25%
WARNING NOTICES