F1 Geometry Tab

The program can now accept Skew Angles for the start and the end of each span. In the Standard Specification mode, if you select to use the Refined Method of Analysis (in the Analysis Factor dialog box on the Analysis tab) for at least one beam, the skew angles will be made available, if not they are grayed out. Since the LRFD specifications have skew correction factors that can be computed using code equations, they will be available in both cases, whether you chose to have the program compute them using code equations or using refined methods of analysis. In the Standard Specifications (LFD) mode, the values of the skew angles are used only for the Refined Method of Analysis.

Similar logic has been implemented for the multi-span cases and you can see the skew angle fields in the Multi-Span screen. Also, notice that the start skew angle from a span must be equal with the end skew angle from the previous span. For that reason, only the end skew angle is editable (except for the first span). If you want to modify a start skew angle you will have to select the previous span and modify the end skew angle first. The limits for skew angle input are from -60 to 60 degrees.