A cable tray is considered what type of penetration?

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Study for the Fire Alarm Lesson 5 and 6 Test. Use flashcards and multiple choice questions with hints and explanations. Prepare effectively for success!

Multiple Choice

A cable tray is considered what type of penetration?

Explanation:
Dynamic penetrations are those that may move or shift within a fire‑rated assembly. A cable tray can experience movement from vibration, thermal expansion, or building movement, so the opening it creates isn’t fixed in place. Firestop systems for dynamic penetrations are designed to accommodate that movement and maintain fire resistance. Static penetrations would imply no movement, which isn’t the case here, and incidental or external aren’t the classifications used for this context.

Dynamic penetrations are those that may move or shift within a fire‑rated assembly. A cable tray can experience movement from vibration, thermal expansion, or building movement, so the opening it creates isn’t fixed in place. Firestop systems for dynamic penetrations are designed to accommodate that movement and maintain fire resistance. Static penetrations would imply no movement, which isn’t the case here, and incidental or external aren’t the classifications used for this context.

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