Industry: Facilities
Solution: Cold Bonding
Location: Redmond, WA
Date: April 2026
Problem:
AT&T needed to install a new rooftop steel platform at a hotel in Redmond, Washington to support 5G cellular antenna equipment. During pre-installation planning, a review of the structural drawings combined with a ground-penetrating scan of the roof slab revealed a dense network of post-tension cables, electrical conduit, and reinforcing steel running directly beneath every proposed anchor location. Drilling mechanical anchors through the slab presented an unacceptable risk of striking a post-tension tendon, which would have compromised the structural integrity of the occupied hotel below and triggered costly emergency repairs. Without a reliable non-penetrating attachment method, the installation faced redesign, relocation, or outright cancellation at this site.
Solution:
The defining success of this project was the ability to structurally attach a steel platform to a post-tensioned concrete roof, fully preserving the integrity of the slab and the safety of the occupied hotel below. Belzona 4111 and Belzona 4911 allowed the contractor to avoid a costly redesign and re-engineering cycle, keep the installation on its original footprint, and return the assembly to service after only a two-day cure. The cold bond approach eliminated hot work, noise, and vibration in a live hospitality environment, and delivered a permanent, load-bearing solution that kept the 5G activation schedule on track.
Project Photos
