Thomas & Mack Modernization Project Interstitial - Utitlity Scan

The Thomas & Mack Modernization project is a 47 million dollar effort to revitalize the event center and bring it up to date with the current codes. We were tasked to create a 3D Model of all utilities within the ground floor interstitial area (area above the ceiling grid). This model would be used to design new utilities and redesign existing utilities if necessary. Our team acquired over 550 scans in offices, rooms and corridors to achieve the necessary level of detail required. Most scans were at a height above 11’ in order to scan the utilities above the ceiling grid. Great care had to be taken in order ensure all scans related to each other accurately.

Utilizing 3D laser scanning technology, we able to create a highly accurate 3d model of the walls and utilities from ground level and interstitial set ups. Strategically placed scans and targeting were used to generate the kind of accuracies that our client was looking to achieve. Over 550 scans were acquired in a period of 2 weeks. Due to the site being in active state, close coordination with our client and the Thomas & Mack was required to access ceiling tiles and allow the venue to function and operate without any shut downs. The data was then brought into the office, downloaded and processed. This information was then coupled with high accuracy survey control to relate it to coordinate system being used for the design. The raw 3d scan files and Revit model drawings were provided to the client for their design.


Survey Control: Due to the need to scan at the extreme heights of 11’ plus, a total station was used to help tie the scans and targeting together. A traverse was completed through the provided control points and carried inside to use for all scan control.

Existing conditions: The existing conditions were challenging due to the fact there were only certain hours we could work and it was during the

Project details

  • Type: As-Built/ Utility Identification
  • Deliverable: 3D CAD/ Revit Model
  • Date: July-August 2014