Successful Deployment of Bolt Monitoring System on Steel Bridge

Theta has recently completed the on-site installation and commissioning of a wireless bolt monitoring system on a major steel bridge, marking another milestone in the company’s structural health monitoring solutions.

Steel bridges rely heavily on high-strength bolts for structural integrity. Over time, these bolts are prone to loosening or fatigue failure due to varying load conditions and environmental stress. Traditional manual inspections are often inefficient, time-consuming, and prone to missed or incorrect detections. By introducing an online monitoring system, Theta enables real-time, remote tracking of bolt integrity, significantly improving operational safety and maintenance efficiency.

The monitoring system was installed at the midspan and 1/4-span sections of the bridge using Theta’s proprietary wireless bolt loosening sensor (SA210) and wireless bolt preload sensor (SAS100). Data is transmitted via a 4G network to Theta’s cloud-based bolt monitoring platform, which supports real-time trend analysis, status detection, and automated warning alerts.

All sensors are designed for non-invasive installation, require no wiring, and can be deployed quickly and easily. With ultra-low power consumption, each sensor offers a battery life of over 10 years. Compared to traditional wired systems, Theta’s wireless solution delivers clear advantages in terms of deployment flexibility, reliability, and long-term maintenance.

This successful deployment enhances the bridge’s structural safety and serves as a proven model for future monitoring projects in infrastructure and transportation.