TimberTool makes it easy to convert closed polylines into mass elements and makes the bounding box width and depth correct for scheduling purposes in Autodesk® AutoCAD® Architecture and Autodesk® AutoCAD® MEP. The product was initially created for usage with timber but works with lumber, structural steel or concrete shapes. When not registered TimberTool works as a free trial that is fully functional except that you can only convert three polylines per AutoCAD session. When purchased it can be used without restrictions.

Purchase here or read more about TimberTool.