Elasticity coefficients are calculated based on the following formulas:
k= A * E / L
- For a roller support: k= 0
- For a pinned support: k = 3 * E * I / L^3
- For a fixed support: k = 12 * E * I / L^3
- For a roller support: k= E * I / L
- For a pinned support: k = 3 * E * I / L
- For a fixed support: k = 4 * E * I / L
Depending on a direction I = Iy or I = Iz.
k= G * Ix / L
Where: G = E / (2*(1+v)).
For walls, the area, the moment of inertia for bending, and the torsional moment of inertia are used according to the assumptions for the elastic support.