Expansion Joint Fire Barriers

What is an Expansion Joint (Linear Rated Barrier)?

Fire-rated decks, partitions, ceilings, and building envelopes are often interrupted by essential features such as continuous movement joints within the structure. To preserve the integrity of these fire-resistance-rated assemblies, fire barriers are installed to fill the gaps within the joint openings. This ensures continuous protection against the spread of smoke, fire, and heat.

These systems must function in harmony with the adjacent assemblies, match their fire-resistance ratings, and maintain performance while accommodating dynamic movement.

Learn About Expansion Joint Fire Barriers

Structural engineers incorporate intentional breaks in a building to accommodate seasonal and thermal expansion, allow for wind-induced movement in taller structures, and absorb seismic forces. These joints extend continuously from the foundation, through all interior and exterior walls, and up to the roof.

Expansion joints are typically introduced in the following situations:

  • Buildings with footprints exceeding 200 feet in length
  • Additions to existing structures
  • Transitions in building direction or significant differences in height between adjacent sections

Master Specification Sections 07 95 00 – Expansion Control

Requirements may also be found in the following:

  • Master Specification Section 07 95 13 – Expansion Cover Assemblies
  • Master Specification Section 07 95 16 – Exterior Expansion Cover Assemblies
  • Master Specification Section 07 95 19 – Parking Structure Expansion Cover Assemblies

5 Key Factors to Successful Fire Barrier Installations:

  1. A solid, crisp substrate is critical for securing the fire barrier in place. This substrate MUST be of a rated construction type.
  2. Consider the fire barrier as a complete system. Seams, changes in direction, and multi-layered systems are good places to check first.
  3. Expansion joint covers matching the tested conditions are a required part of a complete system. Pursue judgments or align your specifications with manufacturers that have completed this for you.
  4. Inspect test documents or request test data when writing specifications to ensure your product can meet the project demands. Pay careful attention to movement ability which is often not clearly defined in inferior barrier systems.
  5. Provide separate details for rated conditions – do not utilize canned or boilerplate details that were not developed with barriers specifically in mind.