Point Cloud.A point cloud is a collection of 3D points that are collected with a scanner by shooting a laser at the subject. In this case the subject was the historic Turnblad Mansion and Carriage House. The first laser scan was performed in October of 2010 to assist with completion of the design of the finer details of the new elevator and staircase tower. The deliverable to the project from the first scan were 2D elevation drawings showing all the stone work on the exterior to assist the team with coordination of architectural details.
More Data. A second scan has been performed to review and ensure everything will slide right down into place in between the two buildings. Technology has changed since the first scan was performed last year. We are now able to load the point cloud into our BIM (Building Information Model) in Autodesk Revit 2012 and cut sections, plan views, details, and 3D views where ever we need more detail about what is existing. These views have been invaluable in our coordination and construction efforts as we come out of the ground with the elevator and staircase tower.
Team Effort. Our subcontractor Lejeune Steel provided us with their digital fabrication model to load into our BIM. This model was built in Tekla by them for their fabrication, but is now seeing more uses throughout the process. With the steel model and point cloud loaded into our BIM we can ensure steel that is fabricated will fit when erected.
The point cloud is also helping us confirm space inside the old community hall to ensure proper fit of MEP equipment above ceilings. Stay tunned for an upcoming post on the 3D coordination of the mechanical systems for the Nelson Cultural Center.