Proposed project is part of up-gradation of the integrated transport system for twin town Hubbali-Dharwad by Karnatak state transport corporation (KSRTC). Husor station, Hubbali is an interchange station. Mushroom columns are designed due to the need of large spans with column free space for easy movement. Each column spans 5 x 13.5 meters. Geometry of the column is derived... from a surface model on which structural lines are generated using dia-grid.