Calculation models.
The ENnorms that apply to the mechanical doorsets use definitions based on the rules of Statics and Dynamics. Metacon used old data sheets refering to those original calculations, but lost the source of the calculations. The data from de datasheets was outdated and many doubted the reliability of the values. That’s why I dug in on the matter and brought together the original formulas and our own data into a few basic ‘Metaconformulas’ which lay the foundation for most of the measurements for every doorset we produced.
After this project the 3 formulas were implemented in our calculations and 3 manuals explained al there is to know for everyone interested. (references to the ENnorms etc.)

Ø Variable tube diameter

N Variable maximum force

Δ Overlay distance