3D Laser Scan of Downtown Chicago Hotel Rooftop MEP Features

Case Study: Laser Scanning Used For Precision in Hotel Rooftop Renovation

Location: Hotel located in Chicago, Illinois

Task: In preparation for a hotel’s renovation which was to include a retractable roof, TruePoint would use their laser scanning equipment to create a complete as-built of the hotel’s existing rooftop patio. Additionally, TruePoint would scan to locate the necessary support columns for the fabrication of a new steel support structure to be installed as part of the addition.

Challenge: The retractable roof system will have 26 to 34 anchor points. These must fit precisely because the roof will be set in place by helicopter. The roof needs to fit on the first try, so it is essential that the points match within the necessary tolerances.

Solution: Using 3D laser scanning, TruePoint was able to accurately determine the dimensions of the space, as well as the exact locations of six support columns, located over 20 feet above the patio floor, which will be used to support the new roof system. This ensured that when the helicopter set the roof, it would fit the first time.

Deliverable: TruePoint provided the client with a registered and cleaned point cloud which they, in turn, imported into Revit to create a model of the space and run clash detection. They were also able to create shop drawings that were then used to construct the retractable roof’s steel support system.

Added Value: Laser scanning proved to be quick, efficient, and cost-effective, reducing the engineering time by up to three weeks, according to the construction management firm. Additionally, laser scanning increased the accuracy of the shop drawings, ensuring that the anchor points fit precisely when the roofing system was set in place.

Contact TruePoint Laser Scanning, Inc., if you have a project which requires precision and a high level of detail, and/or you are on a compressed time schedule. Contact TruePoint at 312-448-1509 or chicago@truepointscanning.com.

Click here to view more case studies.


Skyscraper Parapet Wall In Chicago, Illinois