IRC Loadings (Class AA, A, B, 70R) An IRC loading is a method used in bridge engineering to control the loading and unloading of materials between two se...
An IRC loading is a method used in bridge engineering to control the loading and unloading of materials between two sections of a bridge. This method involves using a force (Class AA) or acceleration (Class A) actuator to apply a controlled force or acceleration to one or both sides of the bridge.
There are four main types of IRC loadings:
Class AA:
Class A:
Class B:
70R:
How they work:
The actuator receives a control signal from the control system, which specifies the force (Class AA), acceleration (Class A), or high-acceleration (70R) to be applied.
The actuator then uses a mechanical mechanism to translate the control signal into a mechanical force or acceleration.
This force or acceleration is then applied to the bridge, controlling the loading or unloading of materials.
Examples:
A Class AA actuator might be used to control the loading of a crane on one side of a bridge.
A Class A actuator might be used to control the unloading of materials from a truck on the other side of a bridge.
A Class B actuator might be used to control the high-speed loading of a new bridge section.
A 70R actuator might be used to control the rapid loading of a high-performance bridge section