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.
How many layers of drywall do I need for 1 hour fire rating?
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.
How thick is a 1 hour fire rated wall?
The most common fire rated drywall is known as type X, which is 5/8 inches thick, placed on each side of 2 by 4 or 2 by 6 inch wood studs and has a minimum fire rating of 1 hour.
What are the parts of a 1 hour rated fire wall?
A one-hour fire-rated wall assembly consists primarily of wood, light-gauge steel framing, or concrete block, insulation, and gypsum wallboard.
What is 1 hour fire rated drywall?
The 5/8-inch, “fire-code” drywall (called Type X) increases a wall's fire rating to a minimum of 1 hour, from the 30-minute rating for standard ½-inch drywall. And it's not just thickness that makes the difference. Type X has a denser core and contains glass fibers that keep it from crumbling in the heat.
What is a 1 hour fire barrier?
Building Codes According to international building code regulations, a fire barrier needs to have a minimum of a 1-hour fire rating, meaning that it can withstand heat and flames for a minimum of one hour.
Is drywall 1 hour fire rated?
Fireproof drywall is the common term; its industry name is Type X drywall. ... Most Type X drywall has a one-hour fire rating. The fire rating for the 1/2-inch drywall used throughout the rest of the home is 30 minutes.Feb 18, 2021
What is the door rating for a 1 hour wall?
3/4-hour
Where are fire rated walls required?
Structural elements that brace the exterior wall but are located outside of the exterior wall or within the plane of the exterior wall shall have the minimum fire-resistance rating required in Tables 601 and 602 for the exterior wall.