2 Hr Fire Rated Wall Construction

Mount a 1 1 2 inch fiberglass barrier inside the studs.

2 hr fire rated wall construction.

Use steel studs and two layers of 1 2 inch type c drywall on each side of the studs for a two hour fire rating on an interior wall. The 2 hour area separation wall system is a 2 hour fire wall consisting of 2 in. 19 1 mm air space on each side. As applied to 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.

There are many ways to meet the requirements for 2 hour fire rated separation walls including foundation to roof masonry walls separating the units. If a conventional 1 2 inch thick sheet of drywall will stand up to 30 minutes of fire then the added 1 8 inch found in the type x drywall along with its other properties will double your margin of safety to 60 minutes. Fire resistance ratings are expressed in the number of minutes or hours a structure can withstand a fire simulation test. Fire ratedfire resistance ratings have long been used by ul astm and building codes to measure the performance of various constructions for fire containment purposes.

Table 1 for one hour rated wall assemblies and table 2 for two hour rated wall assemblies. 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. Each system can be customised to provide the exact level of fire performance required and a range of acoustic and thermal performance to meet each specific. For class 2 to 9 buildings including multi residential and commercial buildings gyprock fire performance solutions include.

50 8 mm light gauge steel h studs that secure two layers of 1 in. American softwood lumber standard ps 20. Use special fiberglass rated for use in firewalls. See general information for fire resistance ratings can ulc s101 certified for canada design criteria and allowable variances design no.

For this reason a fire rated drywall is sometimes called one hour fire wallboard. 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. 25 4 mm shaftliner panels friction fit between studs and a minimum 3 4 in. Stratawall shaft wall cinema wall and securitywall.

An increasingly common and popular method is the gypsum area separation wall which consists of individual stud framed walls filled with fiberglass insulation for each housing unit which are separated by a special construction that consists of. U419 july 12 2018 nonbearing wall ratings 1 2 3 or 4 hr see items 4 5 through 5k.