RECORD MODEL AND DRAWING STANDARDS AND SUBMISSION GUIDELINES ... 9 File Sharing..................................................................................................................... 9 3D (Revit) Model File Format ........................................................................................ 10 CAD Drawing File Format ............................................................................................. 10 External Reference Files (XREF) .................................................................................. 11 Model Space and Paper Space..................................................................................... 11 Title Blocks ................................................................................................................... 11 Drawing Layer Standards.............................................................................................. 12 Scale,单位和公差...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................