A new version of ITSdesign has just been released. The new update now includes two span rafter systems for both API-650 11th Edition and AWWA D-100-05. The design includes inner and outer rafters, intermediate girders, center column, center column base plate, intermediate columns, and intermediate column base plate. You can choose different material grades for the girders than for the rafters allowing higher strength material for girders. A new "Loadings" report has been included to show the loadings on the columns and shell.
Look for more additions coming soon.