In firestopping terminology, a steel pipe running through an opening in a concrete wall is referred to as what?

In firestopping terminology, a steel pipe running through an opening in a concrete wall is referred to as a penetrant because it represents a component that penetrates a fire-rated assembly, such as a wall or floor. This term is important because it emphasizes that the presence of the pipe creates an opening that could allow the passage of fire, smoke, or heat from one side of the barrier to the other. Therefore, proper firestopping measures are necessary around penetrants to maintain the integrity of the fire separation. Understanding the role of a penetrant is crucial for ensuring that firestop systems are correctly installed and effective in preventing the spread of fire and smoke.