Fire-Resistance Rating of Structural Members                      

Fire Seperations Fire Barriers Fire Partitions Fire Walls Horizontal Assembly Defective Fire Walls Structural Members

 

The fire-resistance rating of structural members and assemblies shall comply with the requirements for the type of construction and shall not be less than the rating required for the fire-resistance-rated assemblies supported. Exception: Fire barriers, fire partitions and smoke barriers
as provided in Sections 706.5, 708.4 and 709.4, respectively. 714.2 Protection of structural members. Protection of columns, girders, trusses, beams, lintels or other structural members that are required to have a fire-resistance rating shall comply with this section.
 

Columns, girders, trusses, beams, lintels or other structural members that are required to have a fire-resistance rating and that support more than two floors or one floor and roof, or support a load-bearing wall or a nonload-bearing wall more than two stories high, shall be individually protected on all sides for the full length with materials having the required fire-resistance rating. Other structural members required to have a fire-resistance rating shall be protected by individual encasement, by a membrane or ceiling protection as specified in Section 711, or by a combination of both. Columns shall also comply
with Section 714.2.2. 714.2.1.1 Membrane protection. King studs and
boundary elements that are integral elements in load-bearing walls of light-framed construction shall be permitted to have required fire-resistance ratings provided by the membrane protection provided for the load-bearing wall.

Where columns require a fire-resistance rating, the entire column, including its connections to beams or girders, shall be protected. Where the column extends through a ceiling, fire resistance of the column shall be continuous from the top of the foundation or floor/ceiling assembly below through the ceiling space to the top of the column.

The required thickness and construction of fire-resistance-rated assemblies enclosing trusses shall be based on the results of full-scale tests or combinations of tests on truss components or on approved calculations based on such tests that satisfactorily demonstrate
that the assembly has the required fire resistance. 714.2.4 Attachments to structural members. The edges of lugs, brackets, rivets and bolt heads attached to structural members shall be permitted to extend to within 1 inch (25 mm) of the surface of the fire protection. 714.2.5 Reinforcing. Thickness of protection for concrete or masonry reinforcement shall be measured to the outside of the reinforcement except that stirrups and spiral reinforcement ties are permitted to project not more than 0.5-inch (12.7 mm) into the protection.
 

Load-bearing structural members located within the exteriorwalls or on the outside of a building or structure shall be provided with the highest fire-resistance rating as determined in accordance with the following:
1. As required by Table 601 for the type of building element
based on the type of construction of the building;
2. As required by Table 601 for exterior bearing walls
based on the type of construction; and
3. As required by Table 602 for exterior walls based on the
fire separation distance.

Fire Resistance Assemblies

See Fire Safety

UBC 26-2, Thermal Barrier

• Foam Insulation
• Gypsum
• Wood

ASTM E 119, 1 Hr Wall System

• Wood Wall Assembly
• Gypsum Wall Assembly
• Stucco Exterior Wall Assembly

ASTM E 119, 1 Hr Ceiling System

• Roof/Ceiling Assembly
• Floor/Ceiling Assembly
• Craw Space Floor/Ceiling Assembly

ASTM E 119, Structural Steel Ratings

• Up to 4 hour ratings
• Exterior Applications
• Steel Bar Joists
• Steel Beams
• Steel Columns
• Metal Roof Decking
• LP Gas Frame Structures
   

ASTM E 119, 2 Hr Wall System

• GP Dens Glass System
• Gypsum Wall Structure
• Metal Wall Assembly

ASTM E 119, 2 Hr Ceiling System

• Wood Assembly
• Gypsum Assembly
• Metal Decking Assembly

ASTM E 84, Fire Retardant Wood

• Class "A" Fire Retardant

ASTM E 84 - Extended, Fire Retardant Wood

• 30 Minute Class "A" Rating