One Hour 1 Hour Fire Rated Wall Assembly

Framing nominal 2x4 wood studs spaced 16 in.

One hour 1 hour fire rated wall assembly.

Lumber shall be identified by the grade mark of a lumber. 1 hour rated exterior fire wall zero lot line applications description. This is a 1 hour rated wall with fire from one side typically inside and unidirectional. Vertical wall loads on columns are limited to 50 percent of the maxi mum allowable column design load.

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. Fire rated wood frame wall and floor ceiling assemblies 5 ws4 1 1 one hour fire resistive wood frame wall assembly 2x4 wood stud wall 100 design load astm e 119 nfpa 251. 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. Fire resistance ratings are expressed in the number of minutes or hours a structure can withstand a fire simulation test.

O c double top plates single bottom plate. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. Intertek design lpb wpps 60 01 this intertek listed assembly is commonly used in 1 hour exterior walls along the property line including single family construction. Some key points of construction and use of the nfba s first fire rated assem bly are listed below.

This assembly is fire rated for 1 hour from both sides. 2 1 3 4 2. 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. 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.

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. Lp flameblock sheathing can be used in a few different 1 hour fire rated wall assemblies including.