Dynamic construction joints are tested based on which criteria?

Dynamic construction joints are critical elements in managing movement within a building due to structural shifts, temperature changes, or seismic activity. They are specifically tested based on the number of cycles and the rate of movement they can accommodate. This is essential because dynamic joints need to maintain their integrity over time while allowing for the necessary expansion and contraction that occurs during regular building operation.

Testing for the number of cycles ensures that the joint can withstand repeated movements without degrading or failing. The rate of movement is also a key factor, as it indicates how quickly the joint can respond to changes, which is important in preventing damage and maintaining the overall stability and fire-resistance of the assembly. These criteria are vital for ensuring that dynamic joints perform effectively in real-world conditions, thus safeguarding both the structural integrity of the building and compliance with fire safety regulations.