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// CODE SNIPPET

718.2.1 Fireblocking Materials

Building Code 2018 of Illinois > 7 Fire and Smoke Protection Features > 718 Concealed Spaces > 718.2 Fireblocking > 718.2.1 Fireblocking Materials
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Fireblocking shall consist of the following materials:
  1. Two-inch (51 mm) nominal lumber.
  2. Two thicknesses of 1-inch (25 mm) nominal lumber with broken lap joints.
  3. One thickness of 0.719-inch (18.3 mm) wood structural panels with joints backed by 0.719-inch (18.3 mm) wood structural panels.
  4. One thickness of 0.75-inch (19.1 mm) particleboard with joints backed by 0.75-inch (19 mm) particleboard.
  5. One-half-inch (12.7 mm) gypsum board.
  6. One-fourth-inch (6.4 mm) cement-based millboard.
  7. Batts or blankets of mineral wool, mineral fiber or other approved materials installed in such a manner as to be securely retained in place.
  8. Cellulose insulation installed as tested for the specific application.

718.2.1.1 Batts or Blankets of Mineral Wool or Mineral Fiber

Batts or blankets of mineral wool or mineral fiber or other approved nonrigid materials shall be permitted for compliance with the 10-foot (3048 mm) horizontal fireblocking in walls constructed using parallel rows of studs or staggered studs.

718.2.1.2 Unfaced Fiberglass

Unfaced fiberglass batt insulation used as fireblocking shall fill the entire cross section of the wall cavity to a minimum height of 16 inches (406 mm) measured vertically. Where piping, conduit or similar obstructions are encountered, the insulation shall be packed tightly around the obstruction.

718.2.1.3 Loose-Fill Insulation Material

Loose-fill insulation material, insulating foam sealants and caulk materials shall not be used as a fireblock unless specifically tested in the form and manner intended for use to demonstrate its ability to remain in place and to retard the spread of fire and hot gases.

718.2.1.4 Fireblocking Integrity

The integrity of fireblocks shall be maintained.

718.2.1.5 Double Stud Walls

Batts or blankets of mineral or glass fiber or other approved nonrigid materials shall be allowed as fireblocking in walls constructed using parallel rows of studs or staggered studs.

Related Code Sections


718.2.1 Fire and Smoke Protection Features, Fireblocking Materials
Fireblocking shall consist of the following materials: Two-inch (51 mm) nominal lumber. Two thicknesses of 1-inch (25 mm) nominal lumber ...
Building Code 2018 of Illinois > 7 Fire and Smoke Protection Features > 718 Concealed Spaces > 718.2 Fireblocking > 718.2.1 Fireblocking Materials
2113.20 Masonry, Chimney Fireblocking
All spaces between chimneys and floors and ceilings through which chimneys pass shall be fireblocked with noncombustible material securely fastened ...
Building Code 2018 of Illinois > 21 Masonry > 2113 Masonry Chimneys > 2113.20 Chimney Fireblocking
2111.13 Masonry, Fireplace Fireblocking
All spaces between fireplaces and floors and ceilings through which fireplaces pass shall be fireblocked with noncombustible material securely ...
Building Code 2018 of Illinois > 21 Masonry > 2111 Masonry Fireplaces > 2111.13 Fireplace Fireblocking
718.2 Fire and Smoke Protection Features, Fireblocking
or glass fiber or other approved nonrigid materials shall be allowed as fireblocking in walls constructed using parallel rows of studs or staggered ...
Building Code 2018 of Illinois > 7 Fire and Smoke Protection Features > 718 Concealed Spaces > 718.2 Fireblocking
805.1.1 Interior Finishes, Subfloor Construction
assembly and the flooring is either solidly filled with noncombustible materials or fireblocked in accordance with Section 718, and provided ...
Building Code 2018 of Illinois > 8 Interior Finishes > 805 Combustible Materials in Types I and II Construction > 805.1 Application > 805.1.1 Subfloor Construction
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