When you think of bridges, bearings might not be the first thing that comes to mind. But these small (sometimes hidden) components play a huge role in keeping bridges safe. Whether it’s a massive suspension bridge spanning a river or a simple overpass, bearings are crucial to handling the forces bridges face everyday.
Bridges move. They expand when it’s hot and contract when it’s cold. They flex under the weight of cars and trucks. They shift when the wind blows or when the ground shakes. Bearings are what make all of that movement possible without the bridge cracking or collapsing.
Think of them as the joints of the bridge, allowing smooth movement while supporting massive amounts of pressure.
Here’s how bearings keep bridges working as they should:
Absorb Movement:
Bridges need to move with temperature changes, traffic loads, and even seismic activity. Bearings let the structure flex and shift without breaking.
Spread the Load:
Bearings distribute the weight of the bridge and its traffic evenly across its supports. Without them, certain points would carry too much stress, leading to wear and tear—or worse, structural failure.
Reduce Stress:
Bearings take the strain off the bridge’s main components, like girders and supports. Less stress means fewer cracks, less maintenance, and a longer lifespan.
Add Durability:
Bearings act as a buffer. They handle the repetitive forces that come from daily traffic and environmental changes, preventing damage to critical parts of the bridge.
Different bridges call for different types of bearings. Each one is designed for specific conditions:
Elastomeric Bearings: Flexible and durable, these rubber-and-steel bearings allow for movement in multiple directions. Commonly used in medium-sized bridges.
Pot Bearings: Ideal for heavy loads, these use a confined elastomer to absorb forces while allowing rotation and movement.
Spherical Bearings: Perfect for bridges with complex movements. Spherical bearings handle tilting, twisting, and heavy loads with ease.
Sliding Bearings: Great for long-span bridges and allow for large horizontal shifts.
Roller Bearings: Found in older bridge designs. They allow horizontal movement while supporting vertical loads.
A bridge without bearings is like a human body without joints—rigid and prone to breaking under pressure. Without bearings, here’s what could happen:
Cracks & Damage:
The constant expansion and contraction of materials would lead to cracks and fractures, weakening the structure.
Shorter Lifespan:
Bearings reduce wear and tear on critical components. Without them, bridges would deteriorate much faster.
Risk of Collapse:
In extreme cases, the inability to handle movement and load shifts could lead to catastrophic failure.
Expensive Repairs:
Fixing or replacing a bridge that lacks proper bearings is far more costly than maintaining one with them.
At NSAR Bearings, we understand the critical role bearings play in infrastructure. That’s why we offer high-quality, durable bearings designed to perform under extreme conditions.
Wide Selection: From spherical bearings to pot bearings, we have the right solution for every type of bridge.
Built to Last: Our bearings are designed to handle heavy loads, harsh weather, and long-term use.
Custom Solutions: Need something specific for your project? We offer OEM customization to meet your exact requirements.
Fast Shipping: With offices domestically and overseas warehouses we can deliver in a snap wherever you are.
Bearings might be out of sight, but they’re never out of mind when it comes to bridge design. They allow bridges to move and withstand the elements—all while protecting the structure from damage.
Whether you’re maintaining an existing bridge or working on a new project, choosing the right bearings is essential. We always here to help you find the perfect fit for your needs. Contact us today and let’s keep your bridges—and your business—on track.
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