The frame is placed in the first quadrant of a carthesian coordinate system in a way, which ensures that one edge lays in the origin. The discrete meshes of the grid are formed of crossing sections. Because each section can be defined separately, in practice there are no restrictions and **any rectangular grid can be calculated**. The only restriction is caused by the fact that no curved borders of the meshes are possible.

The cross section of every branch can be set separately. Any point at the upper frame can be set as the lug. The lug is identified by the program as that node which is nearest to the given coordinates.

- Theoretical Part
- Separation into elementary cells
- Separation of coordinates in an elementary cell
- Calculation method
- Limitations
- Type of grids, that can be calculated
- Options for data input
- Results