ComNav Technology: Elevating Sweden’s Tower Game

February 27, 2024
1 min read

ComNav Technology: Building Sweden’s Tallest Tower – Summary


  • The Karlatornet will be Sweden’s tallest building, reaching 74 stories and 246 meters high.
  • The construction method involves high precision using GNSS technology.

In the article “ComNav Technology: Building Sweden’s Tallest Tower” by Matteo Luccio, the focus is on the construction of the Karlatornet in Gothenburg, Sweden, which will become the tallest building in the country. The engineers are using the Core Wall Control Survey (CWCS) method, which incorporates active GNSS control points and SinoGNSS T300S high accuracy GNSS receivers for vertical alignment of the core walls.

The CWCS method, originally used in the construction of the Burj Khalifa, involves multiple concrete pours for core wall elements to ensure precise alignment during construction. This method utilizes GNSS receivers, total stations, inclinometers, and other tools to maintain vertical accuracy.

To monitor the building’s position accurately, four GNSS receivers with 360° prisms are placed at the summit to align various elements vertically. Using post-processed kinematic (PPK) mode, data from the GNSS receivers is processed to achieve millimeter-level accuracy.

The Karlatornet project employs four SinoGNSS T300 GNSS receivers for active control points, and high-precision dual-axis inclinometers are used to correct for building movements during construction. The receivers will also monitor post-construction deformations of the building.

This construction project showcases the importance of using advanced GNSS technology for high-rise building construction to ensure structural stability and precision alignment.

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