1 Hour Fire Rated Interior Wall Assembly

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.

1 hour fire rated interior wall assembly.

Users of fire resistance assemblies are advised to consult the general guide information for each product category and each group of assemblies. Fire resistance ratings are expressed in the number of minutes or hours a structure can withstand a fire simulation test. 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. Ul design u419 1 2 3 or 4 hour wall assembly installation instructions.

This assembly is fire rated for 1 hour from both sides. 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. These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies. American softwood lumber standard ps 20.

Structural shear rated wall with interior fire exposure rating lp wall assembly for this application has been allowed by building code officials common applications. Table 1 for one hour rated wall assemblies and table 2 for two hour rated wall assemblies. Openings in the roof shall not be located within 4 feet 1220 mm of the fire wall. 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.

It also allows for the use of fiberglass insulation. Descriptions of successfully tested i joist floor as. Usg provides resources here for our ul wall assemblies for seamless integration into any construction project. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels.

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. This assembly is fire rated for 1 hour from the interior side only except when brick is the exterior facing. 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.