Autodesk Express Viewer (Version: 5.1.0.527) is required to view .DWF file formats.  DWF (Design Web Format) is a fast, efficient way to distribute design data to anyone who needs it. With Autodesk Express Viewer, a small, free, downloadable application, you can view and print that rich data. What you see is exactly what the designer intended. Click the icon on the left to download.

OTHER FILE FORMATS:
DWG files require a recent version of Autodesk AutoCAD.
DXF files require any version of Autodesk AutoCAD
XLS files require a recent version of Microsoft Excel
PDF files require Adobe Acrobat Reader 7.0