The "Props"contains a with a list of input props. (editing) props is performed in the "New prop (Edit prop)" by pressing the " " ("Edit", "Remove") button. The input props can also be edited on the desktop with the help of or by .
The prop is introduced on already deformed structure automatically (obtained from the previous). In subsequent stages the props can no longer be edited, it's only possible to change stiffness of props. In the props are modeled in the same way as but with the initial force equal to zero.
Note: The program doesn't check the prop bearing capacity neither for compression or for buckling.