Firestop

Definition

A Firestop is a wood baffle used to close an opening between studs or joists in balloon or platform framing to retard the spread of fire through the opening.

Purpose

The purpose of a Firestop is to prevent the passage of fire and smoke through concealed spaces in walls and floors, thereby limiting the spread of fire within a building and providing additional time for evacuation and firefighting.

Examples of Use

• Wall Cavities: Installing firestops in wall cavities to block the vertical spread of fire.
• Floor Joists: Placing firestops between floor joists to prevent horizontal fire spread.
• Building Codes: Complying with building codes that require firestops in certain types of framing to enhance fire safety.

Related Terms

• Balloon Framing: A type of construction where the wall studs extend from the foundation to the roof, with no breaks for floors.
• Platform Framing: A type of construction where each floor is framed separately, creating a platform for the next level.
• Fire Barrier: A construction assembly designed to prevent the spread of fire through openings and penetrations.

Notes

• Firestops should be installed according to building codes and fire safety regulations.
• Proper installation of firestops is essential to ensure they effectively retard the spread of fire and smoke.