Which of the following is NOT a type of penetration discussed in firestop systems?

In the context of firestop systems, understanding the types of penetrations is crucial for effective fire protection. The correct answer highlights that "Sill Penetration" is not a recognized type of penetration within firestop terminology.

"Through Penetration" refers to openings created when pipes, ducts, or cables penetrate fire barriers. Firestop materials must be used to seal these penetrations to maintain the integrity of the fire-resistive assembly. "Membrane Penetration" addresses penetrations through a fire-resistance-rated membrane, which is needed to prevent fire and smoke from passing through the walls or floors of a building. While these terms are widely utilized in firestop applications, "Sill Penetration" is not standard nomenclature in firestop systems, making it the correct choice for this question.

The term "Firestop Penetration" is not traditionally used to classify types of penetrations but could imply any penetration requiring firestop measures. Thus, the distinction is clear with "Sill Penetration," as it does not align with the established terminology and classification used in the industry. Understanding these classifications helps in employing the correct firestop solutions effectively.