57
HYDRAULIC WINDSHIELD SYSTEM HWS
measures to ensure the safety of workers on the
building site:
Evacuate all employees working on the HWS
structures. Works must not continue on the HWS
system.
Tie any loose object on the HWS platforms.
The customer is responsible to check the wind
speed and the live loads on the platforms at all times.
The use and the presence of persons on the
HWS system are forbidden when the weather forecast
reports a storm with lightening.
6.1.3.
MAXIMUM WORKING LOADS
According to the load case, some maximum load
conditions are specified to which the system can be
submitted.
In each load case, permanent loads equal for all load
cases and variable loads differing according to the load
case are considered.
Subsequently, the loads to consider are specified:
Permanent loads:
-
Self-weight of the structure.
-
Self-weight of the protection screen.
-
Self-weight of the platforms.
Variable loads:
-
Live loads on the platforms.
-
Wind loads (according to Eurocode 1).
The final values are specified in the
documentation of each application.
Serving as example, these are the loads to consider.
LIVE LOAD (kN/m²)
A
WORKING
B
CLIMBING
C: OUT OF
SERVICE
HWS platform
3
1.5
1.5
Cone recovering
platform
0.75
0
0
WIND (km/h)
100
72
177*
*Note: wind with V
average
=29 m/s, Terrain type=III, height=200 m
According to standard EN-1055 Wind Load
If applies, loads due to other working equipment must
also be considered.
6.1.4.
ANCHORAGE STRENGTH
For each application, the loads acting on each anchor as
well as the minimum strength which the concrete must
have to hold the elevating structure are specified.
6.1.5.
SPECIFIC ASPECTS OF THE HWS SYSTEM
The entire structure with its components must get
assembled according to the instructions and
assembly drawings provided by ULMA. All bolts,
connections, tie rods, pins, etc. must be assembled
correctly.
It is of utmost importance to embed the anchors
into the concrete as indicated in the “User's Guide”
in order to correctly transmit the loads from the
structure to the concrete. The correct transmission
of the reactions in the anchors to the concrete is
responsibility of the customer. Only components
supplied by ULMA are used to support and anchor
the HWS panels. ULMA cannot be held responsible
for the use of material supplied by third parties.
When introducing the “Head LT HWS” into the
“bracket LT”, remove ONLY 1 side “Red Positioning
Pin.
After fixing “bracket LT” and “Head LT” are done
check the following points: