Steel Pin and Roller

Definition

Steel pin and roller joints are used in steel bridge construction to allow for rotation and movement.

Purpose

The purpose of steel pin and roller joints is to accommodate the thermal expansion and contraction of bridge elements, as well as to allow for controlled movement under loads, preventing structural damage.

Examples of Use

• Steel bridges use pin and roller joints to allow for movement and rotation at support points, ensuring flexibility and reducing stress on the structure.
• Highway overpasses employ pin and roller joints to accommodate changes in length due to temperature fluctuations.
• Movable bridges, such as bascule and swing bridges, use pin and roller joints to enable the opening and closing mechanisms.

Related Terms

• Expansion Joint: A joint that allows for the movement of structural elements due to thermal expansion and contraction.
• Bearing: A component that allows for controlled movement and load transfer in structures.
• Hinge: A joint that permits rotation and limited movement between connected parts.

Notes

Steel pin and roller joints are critical components in bridge design, ensuring the structure can safely accommodate movements and loads without sustaining damage.