12
[3] Impact and crashing on the lower
retaining edge (figure 1, risk A)
□
Measure the closing stress (with the proper tool
required by regulation EN 12445) as indicated in
the figure.
Check that the values measured by the
instrument are less than the ones indicated in
the graphic.
Take measurements at the following
points:
L = 200mm from the lateral edges and
half-way;
H = 50mm, 300mm,
and at maximum gate opening, minus
300mm (max 2500mm).
N.B.
The measurements must be taken three
times at each point
In the graphic, the maximum values of the
dynamic operative, static and residual stresses
are indicated compared with the different
positions of the door.
□
If the stresses' values are higher, install a
safety device in accordance with the regulation
EN 12978 (e.g. safety edge) and take the
measurements again.
N.B.
The reduction of the dynamic stress can
be obtained for example by reducing the door
speed or by using a sensitive edge with a high
elastic shear.
[4] Shearing on lateral boards (figure 1, risk B)
□
Measure the closing strengths in the points
shown in the figure.
N.B.
The measurements must be taken three
times at each point
or
□
In case of a tilting gate installed in a private
residence, which does not face onto a public area,
and does not work with time automatic closing, it
is not compulsory to measure the force on the
lateral edges because the risk level is minimal. In
this case, the drive group must comply with the
norm’s requirements EN 60335-2-95.
Stress
400 N
Dynamic IMPACT
Stress
Static CRUSHING
Stress
150 N
25 N
0,75 s
5 s
time
E
N
G
L
I
S
H
