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LEACH'S
Wind Speeds
Persons using or responsible for towers must beware of the effect of wind on the structure. Wherever
possible, as a precaution, it is advisable to tie the tower in to a rigid structure if it is to be used where it is
exposed to potential windy conditions. Users should beware the potential tunnelling effect of open ended
or unclad buildings and narrow openings between buildings. We recommend that the use of the tower is
discontinued in conditions where the wind speed is above 17mph (force 4).
WIND
DESCRIPTION
BEAUFORT
SCALE
AVERAGE
SPEED
INFORMATION
Medium Breeze
4
13-17 mph Safe to work on tower.
Strong Breeze
6
25-31 mph Tie the tower to a solid structure. Do not work on tower.
Gale Force
8
39-46 mph Towers must be dismantled. Towers must not be assembled.
Erecting & Dismantling the Tower
All towers must be built and dismantled in accordance with the step by step instructions in the
following pages corresponding to the particular tower configuration involved and having regard to the
working at height regulations and Health & Safety legislation.
Moving the Tower
Always assess the risks before moving any tower. If there is any doubt as to the safety of the move, the
tower must be dismantled before moving. No persons, tools, equipment or materials shall be permitted
to remain on the tower when it is being moved. The tower should only be moved by raising the stabilisers
by no more than 25mm and pushing it by the lowest frames.
When moving the tower, users are to be particularly careful of the following:
·
Obstructions, moving machinery or electrical cables and equipment
·
not to move the tower in wind speeds of 18mph (force 5) or above
·
the effect of rough, uneven or sloping ground on the stability of the tower
·
locking and unlocking the castors to allow and prevent the tower moving at appropriate times
·
after completing the movement, use a spirit level to ensure that the tower is vertical and safely
supported on an appropriate surface
·
after completing the movement check that the tower is correct and complete.
Summary of Contents for 1298-IM-EN
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