To facilitate and optimize the installation, here below are presented the graphs which
enable to fix the stirrups correctly, according to the door opening angle. Infact, there’s a
relation between this and the stirrups position.
Measure “C” and draw a horizontal line in graph at the read measure. Choose the variance
on the y axis when the motor gear is fixed on “A” , on the y’ axis when the motor gear is
fixed on “B”. The presence of two holes on the stirrup aims at optimizing the use of the
motor.
Choose a position (W) on the draw line, considering the expected opening angle (” “)
adeguate to the column.
Draw vertical line from (W) and determinate “A”.
To continue the installation ascertain that the “A” variance allows the back stirrup to be
fixed, otherwise choose another position on the graph.
Locate the just chosen position on graph 2 and determinate “B” using the curves which
cross the graph vertically.
HOW TO USE A GRAPH
EXAMPLES OF GRAPH USE
C
In the example we considered “C” to measure 90 mm. Once the horizontal line “1” had
been drawn, we decided a 90° opening of the door. Among the “A” variances which allow
such an opening angle , the most suitable to the expected conditions (in particular the
column structure) was identified in the vertical line “2”.
Finally, the point (W) given by the intersection of the two lines was locate in the graph 2. It
can be observed that it is between the curves “605” and “600”.
B can therefore approximate 603/604 mm.
DOOR OPENING’S GRAPH
90°
100°
BA
1W
W
2
y y‘ y y‘
3
HOLE A
HOLE B
GRAPH 1
GRAPH 2
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