58
HYDRAULIC WINDSHIELD SYSTEM HWS
* The 2 “Red Positioning Pins” are correctly
positioned and blocked with its respective “Cotter
Pin R/3”
* The “Double Pin” of the “Head LT HWS” is
correctly positioned and locked with the “Cotter pin
R/3”.
* The “Head LT HWS” rest vertically on the lower
part of the “Bracket LT” and horizontally in the
horizontal support. NEVER suport vertically the head
on the horizontal support.
The live loads and maximum values of reactions
indicated in this guide must be respected. Likewise,
the minimum concrete strengths indicated for the
operation of the HWS system in the different load
cases must be respected. The customer is
responsible to control and check the concrete
strength.
For correct handling of the HWS system, the
customer shall ensure at all times a minimum
lighting of 100lux in working areas, and particularly
in areas where the cylinder operation is supervised.
Travel sequences of the HWS system are carried out
under the supervision of the person in-charge of the
hydraulic installation. This person must be trained
for the handling of the HWS systems.
Before starting to elevate the HWS structure, make
arrangements to close the sides of the platform to
avoid falls from height.
The workers responsible for the operation of the
HWS system shall remain in the areas specified in
this guide. During climbing, the access to any other
area of the structure which is not the specified one
is forbidden. Before starting any movement it must
be ensured that no person is exposed to any danger
and a clear sign to everybody that movement will
start shortly must be given.
The HWS system must never be used as elevators
for material or persons.
During the elevation of the structure, when the
cylinders and climbing heads are working, the
workers responsible for the handling do not touch at
any time components in motion or hydraulic power
units, as this can lead to crushing and bruising
injuries.
During climbing operations, there are workers at
each climbing unit to ensure:
-
The correct operation of each cylinder and
climbing heads during each cylinder stroke.
-
That no parts of the moving structure can
collide with parts of the rest of the structure.
At the first lifting check that the cylinders support
the weight when the power unit is stopped. For that
purpose, lift the panel 5cm, stop the power unit,
wait and observe.
After each extension or retraction of the cylinder
during the process of elevation of the structure, it
must be ensured that the pawl returns to its working
position. Otherwise, the pawl must be placed
manually in its working position before re-starting
an extension or retraction.
To prevent collision between elements during
elevation, special attention must be paid to any
object which could interfere in the elevation
movement of the system.
When the climbing operations are finished, the
hydraulic power units are switched off with the
power switch.
The HWS structure can also be lowered with the
hydraulic system. However, this operation is not
automatic. Therefore this operation is carried out
with caution and always under the supervision of
personnel of ULMA.