Hi Sivakumar, I'm not fully aware of the exporting capabilities of PDS/PDMS, but I guess it's not possible to export your models into IFC. However, Tekla BIMsight can open also 3D DGN files so you can use that format instead. There may be some drawbacks in using DGN format, for example some object intelligence may be lost, however, the model geometry should be correctly exported to DGN. Hence, the DGN model should be suitable to be used for design coordination purposes. See also this forum discussion about the DGN models exported from PDS http://www.teklabimsight.com/helpcenter/topic.jsp?id=885eba29-47c9-4a4b-8d8b-f3dcca25e90f Please let us know if you are having any problems with the issue, and we'll try to help you further. Thanks, Heikki