Which type of construction joint is located at the top of a wall?

The head-of-wall joint is specifically designed to accommodate the intersection between the top of a wall and an overhead structure, such as a floor or roof system. This joint is significant in firestop applications as it provides a crucial barrier against the spread of fire and smoke, ensuring that the fire-resistance rating of the wall is maintained.

In construction, this joint allows for vertical movement due to thermal expansion, settling, or other factors. Proper firestopping at this juncture is essential to comply with building codes and enhance overall safety. The head-of-wall joint typically requires specific firestop solutions that can handle the movement while also maintaining the fire-resistance integrity.

Other types of joints, like floor-to-floor or wall-to-wall joints, do not specifically denote the position at the top of a wall, which is critical for firestop applications in managing overall wall performances and ensuring structural integrity.