Bauer BG 25 - Permissible Wind Speed

SAFETY
BG 25 / 2011 / 2254_BG25_en_0000498763_V01
2 - 11
2.6 PERMISSIBLE WIND SPEED
The place to measure the wind speed is at the masthead:
Max. permissible wind speed for equipment operation
Barrier effect
m/s
km/h
miles/h
Beaufort
ktn
20
72
45
8
39
250 (N/m²)
WARNING!
Rig tipping hazard!
Shut down the equipment before the value is exceeded.
 Remove attached drilling tool(s) and suspended load.
 Lower movable components as close to the ground as possible.
 Adjust the uppercarriage in line with the undercarriage and interlock them.
 Set the mast into the minimum working range.
 Extend the mast prop (if equipped) to the ground.
Table of wind forces and speeds
Wind force
Wind speed
Wind effects
Beaufort
English
m/s
km/h
0
calm
0 - 0.2
less than 1
Smoke rises straight in the air, sea is calm-glassy
1
light air
0.3 - 1.5
1 - 5
Smoke drifts but vanes remain still, sea is rippled
2
light breeze
1.6 - 3.3
6 - 11
Wind can be felt on your face, leaves rustle,
sea has wavelets
3
gentle breeze
3.4 - 5.4
12 - 19
Leaves and thin twigs move, pennants
stretch, wave crests begin to break
4
moderate breeze
5.5 - 7.9
20 - 28
Dust and paper lift, twigs and branch lets
sway, waves are growing in length, scattered
white-caps
5
fresh breeze
8 - 10.7
29 - 38
Small trees begin to sway, waves are white-
capped all over the sea
6
strong breeze
10.8 - 13.8
39 - 49
Sturdy branches move, wires sing, umbrellas
are hard to handle, sea is rough, crests break
7
near gale
13.9 - 17.1
50 - 61
Whole trees swaying, walking towards the
wind is difficult, sea is very rough, foam on
crests
8
gale
17.2 - 20.7
62 - 74
Branches break off, walking outdoor is extremely
difficult, waves are high, spray from crests
9
strong gale
20.8 - 24.4
75 - 88
Minor damage to buildings (roof tiles and
chimney hoods are ripped off), on the sea
waves are very high and the visibility is ob-
structed by spray