Comunello LIWIN L40 Slim Instrucciones De Uso Y De Instalacion página 32

4. PRELIMINARY CHECKS FOR INSTALLATION
4.1 CALCULATION OF THE NECESSARY FORCE
The calculation is made without considering the loads due to atmospheric agents.
Symbology F (N) = Force required to open the panel (mobile part of the window);
P (Kg) = Weight of the panel (mobile part of the window);
C (cm) = Actuator opening stroke;
H (cm) = Height of the panel (movable part of the window).
Bottom hung inward opening window
C
F
( C ÷ H ) x ( P ÷ 2 ) = F Kg
H
F (Kg) x 9,8 = N F (N)
P
In the case of Hinged or Pantograph windows, the force must only overcome the friction of the hinge.
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Top hung outward opening window
( C ÷ H ) x ( P ÷ 2 ) = F Kg
H
P
F (Kg) x 9,8 = N F (N)
F
C
Horizontal domes or skylights
P ÷ 2 = F Kg
F
P F (Kg) x 9,8 = N F (N)