What is the primary purpose of a firestop system?
Firestop systems are designed to restore the fire-resistance rating of wall and floor assemblies by sealing openings and joints against the spread of fire and smoke.
Which type of firestop material expands when exposed to high heat?
Intumescent materials swell when heated, closing off openings and helping to block the passage of fire and hot gases.
Which UL designation indicates a firestop system?
UL firestop systems are identified with a unique alphanumeric code, typically starting with a letter that denotes the type of barrier, such as 'W' for wall.
What component is typically used to pack around pipes before applying sealant in a firestop system?
Mineral wool is often used as a backing or packing material due to its heat resistance and ability to support sealants.
Which material is commonly used in firestop collars for plastic pipe penetrations?
Firestop collars often contain intumescent material that expands and crushes melting plastic pipes to maintain the fire barrier.
What is a key requirement when selecting a firestop system for a specific penetration?
The selected system must be tested and listed for the exact type of penetration and construction conditions present.