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2. Formulas and recommendations for installation
2.1.
Calculation of opening / closure force
Using the formulas on this page, approximate calculations can be made for the force
required to open or close the window considering all the factors that determine the
calculation.
Symbols used for the calculation
F (Kg) = Force for opening or closing
C (cm) = Opening stroke (actuator stroke)
For horizontal light domes or
skylights
F = 0,54 x P
(Eventual weight of snow or wind on the
cupola should be calculated separately).
2.2.
Maximum opening according to height of sash
The actuator stroke is in accordance with the height of the sash and its application. Check
that the actuator stroke does not touch the profile of the sash and that the chain does not
exert force on the window frame (Measurements in mm).
A
TTENTION
are inferior to those indicated in the table below. In the event that the height of the
sash should be lower, call on the manufacturer to check the appliance.
. For safety reasons the actuator should not be assembled if dimensions
P (Kg) = Weight of the window (mobile sash only)
H (cm) = Height of the mobile sash
For vertical windows
TOP HUNG WINDOWS
BOTTOM HUNG WINDOWS
F = 0,54 x P x C : H
(Eventual load of favourable or unfavourable wind
on the sash should be calculated separately.)
,
(A)
OUTWARD OPENING
(B)
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