2 Hr Fire Rated Wall Construction

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.

2 hr fire rated wall construction.

U419 july 12 2018 nonbearing wall ratings 1 2 3 or 4 hr see items 4 5 through 5k. 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. 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. 19 1 mm air space on each side.

Table 1 for one hour rated wall assemblies and table 2 for two hour rated wall assemblies. There are many ways to meet the requirements for 2 hour fire rated separation walls including foundation to roof masonry walls separating the units. For this reason a fire rated drywall is sometimes called one hour fire wallboard. Stratawall shaft wall cinema wall and securitywall.

For class 2 to 9 buildings including multi residential and commercial buildings gyprock fire performance solutions include. Use special fiberglass rated for use in firewalls. 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. 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.

Densglass sheathing adds performance and durability to a wide range of fire rated and non fire rated building assemblies. Descriptions of successfully tested i joist floor as. American softwood lumber standard ps 20. The 2 hour area separation wall system is a 2 hour fire wall consisting of 2 in.

See general information for fire resistance ratings can ulc s101 certified for canada design criteria and allowable variances design no. 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. Mount a 1 1 2 inch fiberglass barrier inside the studs. Dens solutions are industry trusted high performing fiberglass mat gypsum panels suitable for your wall roof ceiling and floor projects.

25 4 mm shaftliner panels friction fit between studs and a minimum 3 4 in. 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.