Kuidas muudab mudelprojekteerimine teraskonstruktsioonide valmistamist ja ehitamist
system from the virtual model to the steel columns. During erection the surveyor
compared the actual location of the beam to the theoretical XYZ position in the model
and determined the necessary adjustments. Up to 26 surveyor’s prisms were used on the
project at one time as well as a majority of the reflective tape targets (Interview,
05/12/2010).
Over the last decade, steel fabricators have moved from AutoCAD and Microstation to
3D fabrication applications by Tekla, Design Data and AceCAD. Today, majority of steel
fabrication shops in the U.S. are 3D-based, using one of the three packages. 3D models
are used to produce bill of materials for estimating, CNC instructions for cutting and
drilling equipment, and assembly drawings for erection (Eastman, 2004).
For both projects the required tolerances were met and the deflections fell within an
allowable range. After the Library’s temporary steel was removed and the building had
annaabi.ee 
