1 Hour Fire Rated Interior Wall Assembly

The guide information includes specifics concerning alternate materials and alternate.

1 hour fire rated interior wall assembly. Ul design u419 1 2 3 or 4 hour wall assembly installation instructions. The resistance of the assembly to the passage of fire is rated in hours and is determined from tests like astm e 119 also listed as national fire protection association nfpa 251 standard. Descriptions of successfully tested i joist floor as. Fire safety caution passing a fire test in a controlled laboratory setting and or certifying or labeling a product as having a one hour two hour or any other fire resistance or protection rating and therefore as acceptable for use in certain fire rated assemblies systems does not mean that either a particular assembly system.

This assembly is fire rated for 1 hour from the interior side only except when brick is the exterior facing. It also allows for the use of fiberglass insulation. Lumber shall be identified by the grade mark of a lumber grading or inspection agency that has been approved by an accreditation body that complies with the. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels.

This assembly is fire rated for 1 hour from both sides. Elements of buildings the fire resistance rating classifies the ability of an assembly to confine and isolate fire within a zone comprised of fire resistance rated walls ceiling and floor assemblies. Openings in the roof shall not be located within 4 feet 1220 mm of the fire wall. According to the engineered wood association a one hour rating indicates that a wall constructed in a manner similar to the one tested will contain flames and high temperatures and support its full load for at least one hour after the fire begins.

These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. Two layers of 5 8 inch fire rated gypsum on the interior with steel framing or frt wood framing frt plywood exterior sheathing and 5 8 inch exterior fire rated. This ul listed assembly is commonly used in type v multifamily construction in load bearing exterior walls. Table 1 for one hour rated wall assemblies and table 2 for two hour rated wall assemblies.

The lower roof assembly within 4 feet 1220 mm of the wall has not less than a 1 hour fire resistance rating and the entire length and span of supporting elements for the rated roof assembly has a fire resistance rating of not less than 1 hour. Fire resistance ratings are expressed in the number of minutes or hours a structure can withstand a fire simulation test. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project.