1 Hour Fire Rated Wall

2009 irc requires walls built within 5 of a property line or within 5 of another building on the same property to have a 1 hour fire resistance rating with fire exposure from the exterior of the building note.

1 hour fire rated wall.

Specifying 1 hour fire rated walls for about a century architects and builders have used gypsum panels in wall assemblies to meet the testing criteria for 1 hour fire rated walls. A 5 8 inch thick type x gypsum wallboard hangs vertically to reduce the number of joints and possible fire entry points inside the studs. Fire resistance ratings are expressed in the number of minutes or hours a structure can withstand a fire simulation test. Both military and commercial customers come to panel built for their laboratory tested astm certified one hour fire resistant wall panel system.

A typical one hour fire rated wall assembly approved by universal laboratories consists of 2 x 4 inch wood wall studs and r 13 glass fiber insulation faced with a vapor retarding foil filling the cavities. Descriptions of successfully tested lumber wall assemblies are provided in. This specially designed fire resistant wall panel is composed of 5 8 fire. 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.

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. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. Astm certified 1 hour fire rated wall panel. Lumber shall be identified by the grade mark of a lumber grading or inspection agency that has been approved by an.

Table 1 for one hour rated wall assemblies and table 2 for two hour rated wall assemblies. 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. Panel built has installed numerous one hour systems throughout the country. 1 hour rated exterior fire wall zero lot line applications description.

Have tested a number of wood frame fire rated assem blies.