3D Laser Scanning: Overview

Each of Egan's internal team members has more than a decade in of experience in providing high resolution reality capture and construction technology solutions. We use 3D laser scanning for fast, accurate and cost-effective as-built documentation and risk mitigation of both new construction and renovation projects. Egan has developed extensive QA/QC processes that ensure we exceed our customers’ expectations and deliver outstanding client experiences. Additionally, we complete 100% of our projects on-site, in-house and in Michigan.

High Resolution Reality Capture

By using the most advanced techniques in 3D laser scanning, our team captures comprehensive, as-built measurements in high resolution. Our scanners collect up to 1 million 3D measurements every second. Each measurement represents a point in space, and the collection of measurements is called a pointcloud. Our technically savvy personnel and sophisticated computer programs optimize the massive data we collect; as a result, we deliver as-built documentation more rapidly than ever before in the most common file formats. Designers, architects, engineers and others can quickly integrate this data into their project for fast, accurate BIM Models and other construction documents. Because Egan can additionally use cameras with infrared sensors, we can conduct thermal imaging during your high resolution reality capture. We can inspect mechanical equipment and quickly provide technicians with troubleshooting information or even predict equipment failure through regular surveying.

Scan to BIM

Until recently, any 3D model built from measurements of existing structures was suspect because taking measurements was tedious, prone to errors, expensive and often dangerous. No longer.

After scanning, Egan converts the point-cloud data to a precise 3D model. We can build models at any level of detail our clients need, from simple structural models to finely detailed, complex MEP models. 

BIM Coordination

Instead of turning over a 3D model to the project team, Egan can collaborate with the owner, design professionals and construction managers to lead multi-trade BIM coordination. Our data-rich scans include all major elements and building systems, including architectural components, plumbing, HVAC, electrical, fire protection and more. By coordinating these systems in the 3D model, we ensure constructibility and prevent clashes from occurring on the job site. Rework in the field is costly and time-consuming -- accounting for as much as 15% of a project’s cost -- but can be avoided through accurate coordination.

As a full-service mechanical contractor and fabricator, we incorporate our field staff’s knowledge in order to design for ease of access to systems and equipment for future maintenance. We are also able to identify opportunities for project modularization. We can construct those components in-house at Egan’s 60,000 square-foot fabrication shop, which reduces on-site construction time and project costs.


We use Leica ScanStation P40 scanners and Leica MS60 Multistation surveying equipment. These tools offer the industry’s best combination of accurate measurements, longest ranges and fastest speeds. We can maintain +/-1.2 mm accuracy at an 800-foot range.

Scanning for Fabrication

Driven by the demand of complex construction and installations, lack of skilled trades and the strive for faster project delivery, construction teams are continually looking for way to streamline projects. Prefabricated construction solutions address the challenges faced by construction teams to deliver higher productivity and parallel project scheduling at a more efficient cost.

Laser Scan & Survey: In a fraction of the time it takes for hand measurements, a laser scan captures millions of 3D measurements (point-cloud data) with +/-1 mm accuracy.

3D Modeling & Coordination: Our internal virtual construction teams build a 3D model from the point-cloud data, then incorporate the prefabrication design to verify constructability.

Fabrication: The project team and our code-certified welders fabricate, coordinate, test and build the modular construction packages, equipment, steel and pipe using shop drawings extracted from the 3D model.

Quality Scan: The modular components undergo an internal laser scan to quality check against the 3D model. This quality control process allows us to identify any deviations, and adjust those deviations prior to shipping and installation.

Installation & Turnover: As components arrive on-site, installation is quick and efficient because all components have been factory tested and validated against existing conditions by our virtual construction teams.