How thick is a 2 hour fire rated wall?

A 2-hour rating can be achieved by a wall with an equivalent thickness of as little as 3 1/5 inches when expanded slag or pumice is used or 4 1/2 inches when siliceous gravel is used as the aggregate.

How thick is a fire rated wall?

Using 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.

What is required for a 2-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. Put two sheets together on one side or use one sheet on each side of a wall.

How thick are fireproof walls?

Fireproof drywall is the common term; its industry name is Type X drywall. The thickness of this drywall is 5/8-inch, including all layers. Glass fibers are added to the board to help it slow down the fire. Also, because it is denser than normal gypsum and paper drywall, it takes longer for the fire to degrade it.

How many layers of drywall do I need for a 2-hour rating?

As 2 hours of fire protection has become the standard for fire safety in America, it has become somewhat of a standard practice to include two layers of type X drywall within a building's perimeter in order to achieve this required level of fire safety.

AC 015 - What is a fire rated wall?

What is a 2-hour fire rating?

It means that the system has satisfied the requirements for a 2-hour rating specified in a relevant standard test. In the case of a building, it could mean that some of the construction elements and/or assemblies in that building have achieved a 2-hour rating in a standard ASTM E119 fire resistance test.

How do I build a fireproof wall?

Attach a layer of plasterboard to the interior of the ICF wall. Use concrete screws to attach the plasterboard to the ICF wall. Plasterboard is rated for roughly half an hour of fire resistance on its own, and combined with the ICF wall, it will only make the total wall more fire resistant.

How thick is a 4 hour fire wall?

(25 mm) thickness (measured perpendicular to the face of the wall) of ceramic fiber in the joint can be used in walls with fire resistance ratings up to 3 hours, while a 2 in. (51 mm) thickness can be used in the joints of a 4-hour wall.

Do you need special drywall around a gas fireplace?

We talked to the experts, and this is what we discovered. It would be best if you did not use regular drywall around a fireplace as it is considered to be highly flammable. Instead, it would be best to surround the fireplace area with non-combustible materials such as stone, tile, marble, or metal.

What kind of drywall do you use for a fireplace?

Type X drywall is a common material used for wood stove installations. Type X is a gypsum-based drywall that is 5/8 inch thick and is installed on each side of a 2-inch by 4-inch wood stud, spaced 16 inches on center or spaced 24 inches on center.

What constitutes a fire rated wall?

Fire Wall – A fire-resistance-rated wall having protected openings, which restricts the spread of fire and extends continuously from the foundation to or through the roof, with sufficient structural stability under fire conditions to allow collapse of construction on either side without collapse of the wall.

What is a 60 60 60 fire rated wall?

Figure 1 below shows an FRL of 60/60/60. This means that if a building element were exposed to a standard fire test, it would not be expected to fail for 60 minutes in each of the three criteria. The BCA specifies FRLs for building elements such as walls, columns, roofs and floors.

What is the fire rating of 3/4 drywall?

USG Sheetrock® Brand Ultracode® Core Gypsum Panels can achieve a two-hour fire rating with single-layer construction when used with mineral wool insulation in steel framed walls.

How do you know if a wall is fire rated?

If it's an exterior – an interior/exterior wall – an inside surface of an exterior wall, like a garage wall, then you would use a 5/8-inch-thick, fire-rated drywall.

Are all 5/8 drywall fire rated?

Regular drywall has naturally occurring fire resistance due to the presence of gypsum in the core but is not fire rated. Type X drywall has special core additives that allow it to be used in fire rated designs and usually comes in 5/8” thickness.

What material do you use around a fireplace?

Steel, concrete and stone are the most modern options, tile is a more traditional option, and brick can be either modern or traditional (depending on the design) for a fireplace surround.

How do you insulate behind a gas fireplace?

Can you put shiplap around a gas fireplace?

For maximum security, consider using a noncombustible material in your fireplace surround before adding shiplap. Many people will use tile, marble, stone, brick, or steel as surround materials directly around the fireplace opening for their gas or wood-burning fireplaces.

Is CMU 2 hour wall rated?

4 Hour Fire Rating - 8 inch C.M.U. 2 Hour Fire Rating - 10 inch C.M.U. ... 3 Hour Fire Rating - 10 inch C.M.U. . 4 Hour Fire Rating - 10 inch C.M.U.

Is a concrete block wall fire rated?

Concrete masonry is a noncombustible construction material possessing excellent fire-resistive properties. The resistance of concrete masonry to fire is well established by extensive testing to be a function of the type of aggregate used in the manufacture of the masonry units and their equivalent thickness.

Do you need 5/8 drywall in garage?

The takeaway from IRC Code for Drywall in a Garage is that for an attached garage, play safe and use 5⁄8 -inch Type X gypsum board. For a detached garage, use drywall or an alternative to drywall, as a detached garage is not covered by any code for drywall in a garage.

What is the fire rating of 1/2 Type C drywall?

Type C drywall is known as the more durable version of Type X—there are more glass fibers in this product as well as more vermiculite components, giving it a fire resistance of 2-4 hours. You can find this product at your local drywall and insulation store in 1/2” and 5/8” thickness.

What thickness is drywall?

Most drywall measures 1/2-inch thick. It's the most common choice for interior walls because they are easy to carry and hang. If weight is a concern, consider ultra-light half-inch drywall.