Safety regulations | 5
DOCMA0000006‐UK ﴾ENG﴿ ‐ Samson FPT 3A 45
5.8 Working in windy conditions
Windspeedvariationcancauseanumberofproblemsincludingthelossofvehiclestability,loadoscillation,
andadecreaseinvisibilityduetodust,leaves,etc.
Adversefactorstovehicleuseare:
– Locationoftheworksite,theaerodynamiceffectofbuildings,treesandotherstructuresinfluencewind
speed.
– The height of the extended boom: the higher the boom is raised vertically, the higher wind speed
becomes.
– Loadbulkarea:themorespacetheloadoccupies,themorethewindforceisfelt.
Strong wind
DIECItelehandlerscanbeuseduptoawindspeedof45km/h(12.5m/s)Km/h,equalto12.5m/s(No.6on
theBeaufortscale)measuredontheground.
At10°Ctemperature,windwithaspeedof32km/h(8.9m/s)Km/hitseemsthatexposedpartsofthebody
haveatemperatureof0°C.Thehigheryouclimbthefasterthewindspeedandthemorethesensationof
pressuredropincreases.
WARNING
Strong wind danger
In the presence of strong winds (no.5 Beaufort scale) never lift loads with surfaces exceeding 1 m².
BelowyoucanfindthegraphoftheBeaufortscaleforanindicationofthewindspeedwithwhichyouare
workingandwhentosuspendoperations,ifwindspeedshouldexceeddeterminedvalues.
Beaufort Wind Scale
No. Definition Indicators Speed (m/s)
0 Calm Smokerisesvertically 00,2
1 Lightair Smokedriftwinddirection 0.31,5
2 Lightbreeze Wind felt on exposed skin. Leaves rustle; vanes begin to
move
1.63
3 Gentlebreeze Leaves and small twigs constantly moving; light flags
extended
35
4 Moderatebreeze Dust and loose paper raised. Small branches begin to
move
58
5 Freshbreeze Smalltreesinleafbegintosway;glassywater,smallwaves
form
811
6 Strongbreeze Large branches in motion. Whistling heard in electrical
wires.Umbrellausebecomesdifficult
1114
7 Strongwind Wholetreesinmotion.Effortneededto walk against the
wind
1417
8 Freshgale Sometwigsbrokenfromtrees.Carsveeronroad 1721
9 Stronggale Slightdamagetobuildings(fallingchimneysandtiles) 2124