PTFE finds extensive use in structural bearings, primarily in civil engineering applications such as bridges, buildings, and infrastructure projects. 

Here’s how PTFE is utilised in structural bearings:

1. Bridge Construction: In bridge construction, PTFE bearings are commonly employed to facilitate movement between different parts of the structure. Bridges undergo thermal expansion and contraction due to temperature variations, as well as deflection and settlement caused by traffic loads and environmental factors. PTFE bearings allow controlled movement along longitudinal, transverse, and rotational axes, ensuring the structural integrity of the bridge while minimizing friction-induced wear and stress concentrations.
2. Building Expansion Joints: PTFE bearings are used in building expansion joints to accommodate the movement of adjacent structural elements caused by factors such as thermal expansion, seismic activity, and settlement. These bearings provide flexibility and allow for smooth movement between building components, reducing the risk of structural damage and enhancing occupant comfort.
3. Seismic Isolation Systems: In seismic-prone regions, PTFE bearings are incorporated into seismic isolation systems to mitigate the effects of earthquakes on buildings and infrastructure. These bearings enable buildings to move independently of the ground motion, dissipating seismic energy and reducing the transmission of forces to the superstructure. PTFE’s low friction properties help minimize hysteretic damping and ensure effective seismic isolation performance.
4. Industrial Applications: PTFE bearings are also utilized in industrial structures such as warehouses, manufacturing facilities, and power plants. They accommodate thermal expansion and contraction of equipment and structural components, allowing for smooth operation and preventing damage due to excessive stress concentrations.
5. Environmental Resistance: PTFE bearings are resistant to corrosion, moisture, and UV radiation, making them suitable for outdoor applications. Whether in bridges spanning waterways, elevated highways exposed to the elements, or offshore structures subject to marine conditions, PTFE bearings provide long-lasting performance and require minimal maintenance.
6. Load-Bearing Capacity: PTFE bearings can support substantial loads while maintaining their structural integrity and low-friction properties. This capability is essential for ensuring the stability and safety of the overall structure under varying load conditions.

Overall, the use of PTFE in structural bearings offers numerous advantages, including durability, reliability, low maintenance requirements, and enhanced structural performance. Its unique combination of properties makes it an indispensable material in civil engineering and construction projects worldwide.