Bridge railings are essential safety features that protect people using bridges and help redirect vehicles in case of accidents. Let’s explore the basics of bridge railings.
Bridge railings serve two main functions:
While they don’t support the bridge’s structure, railings need to be strong enough to withstand impacts. They are stiffer than regular highway railings and more rigid than flexible ones.
Transition railings help smoothly connect different types of railings, providing a gradual change in hardness between them.
This is the latest standard for testing safety devices on the National Highway System. It ensures that railings redirect vehicles safely and protect public health.
There are various types of railings used on bridges, each with its own advantages and considerations.
| Type | Description |
|---|---|
| Steel Bridge Railing | – Common, available in different designs. |
| – Used for low-traffic areas and pedestrian safety on architecturally significant bridges. | |
| Concrete Bridge Railing | – Attached to the deck slab, suitable for urban areas or heavy truck traffic. |
| W-Beam Bridge Railings | – Basic steel railing for smaller bridges or roads with lower traffic. |
| – Can be 27 inches from the top of the bridge to the pavement. | |
| Thrie Beam Bridge Railings | – High-strength guard rails for highways, especially on curves and slopes. |
| – Absorbs impact and guides out-of-control vehicles to a safer stop. |
The choice of railing depends on factors like design speed, traffic volume, truck usage, and site layout. Functional and aesthetic considerations also play a role.
Preventive maintenance is crucial to extend the lifespan of railings. This involves protecting against moisture, de-icing chemicals, and other environmental factors.
Regular maintenance is key to keeping railings in top condition. Before starting any maintenance work, assess the extent of repairs needed and ensure proper traffic control measures are in place. This ensures the safety of both workers and bridge users.
