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www.hunker.com/.../what-constitutes-a-one-hour-fire-rated-wall

Fire resistant walls are designed to contain a fire to a room or building for a designated time period. The wall's rating indicates how long it can keep a fire from spreading. Fire rated walls are designed to contain a fire for a specified amount of time.

www.usg.com/.../usg-fire-resistant-assemblies-catalog-en-SA100.pdf

One of the most critical issues for architects is ensuring that building design addresses fire-safety issues. This resource lists fire-resistant ... to confine and isolate fire within a zone comprised of fire-resistance rated walls, ceiling ... hr hour ht height insul insulating or insulation int interior lamin laminated

www.certainteed.com/resources/CT068C System Manual 2013-6...

Concrete Block/Gypsum Board Walls Fire Resistance Rating - 2h ... A 2 hour fire resistant rating for a 12.7 mm (1/2”) thick Type C when applied in a double layer and ... applied shall simulate the working stress of the construction components. The wall or partition must also stop flame or hot gasses capable of igniting cotton waste. The average

en.wikipedia.org/wiki/Firewall_(construction)

Fire barrier walls are typically continuous from an exterior wall to an exterior wall, or from a floor below to a floor or roof above, or from one fire barrier wall to another fire barrier wall, having a fire resistance rating equal to or greater than the required rating for the application.

www.thebalancesmb.com/fire-protection-gypsum-separation...

Building codes have special requirements for the walls separating adjacent townhome units, and the primary requirement is that they serve as two-hour firewalls–meaning that fire in one unit will require at least two hours before breaking through the wall.

articles.extension.org/pages/43348/what-does-a-one-hour...

A "one-hour" fire rating is given to an assembly consisting of various building materials that can resist the exposure of a standardized fire exposure for one hour.

getscribeware.com/blog/1-hour-firewall

Type X fire rated gypsum drywall is 5/8 -inch thick and installed on each side of a wood framed wall to create the fire separation. Type C fire rated drywall has more glass fiber reinforcement and other ingredients compared to type “X,” which make it superior to Type X. Type C gypsum board is available in 1/2-inch and 5/8-inch thicknesses.

www.hunker.com/.../how-to-assemble-a-two-hour-fire-rated-wall

Double the number of Type X sheets on the wall for a simple system installed over fire-resistant fiberglass insulation; each sheet of 5/8-inch Type X drywall is rated to resist fire for one hour, so two layers will produce a two-hour firewall.

alliedmodular.com/1-hour-fire-rated-wall-system-fireline

1 Hour Fire Rated Wall System-FireLine. Allied Modular Introduces New 1 Hour Fire Rated Wall System-FireLine. Many building codes often require the use of a one hour fire rated wall. The reason being, this fire rated wall often acts as a barrier between hazardous area and office.

www.usgdesignstudio.com/wall-selector.asp

Gypsum Sheathing (non-rated) - 1/2 in. or 5/8 in. thick gypsum sheathing (non-rated) applied horizontally; Corrugated Wall Ties-3/4 in. thick by 6-5/8 in. thick long, 20 MSG galv steel. Attached to each stud with 2-3/8 in. thick long 8d cement coated nails, every sixth course of bricks