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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 drywall has special core additives that allow it to be used in fire rated designs and usually comes in 5/8” thickness. Type X drywall products will have a UL/ULC Marking printed on the back of each board identifying it as a fire-resistance rated board.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.
Is it 5/8 drywall 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. Type X drywall products will have a UL/ULC Marking printed on the back of each board identifying it as a fire-resistance rated board.
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.
AC 015 – What is a fire rated wall?
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How thick is 2-hour fireproofing?
The construction is type 1B as defined by the International Building Code IBC [3] and the floor system is required to have a 2-hour fire resistance rating. A 2-hour restrained assembly rating can be achieved with a 3 ¼ in. light- weight concrete thickness over 2 in.
What makes a 1 hour fire rated wall?
Ratings for fire resistance are given in accordance to the time a structure can contain a simulation fire. More specifically, if a wall is constructed in a manner that closely resembles a tested wall which has shown to contain flames and high temperature for one hour, it is eligible to receive a 1-hour rating.
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.
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.
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.
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What are the 3 main classifications of fire-rated walls?
Type 1: Fire-resistive: High-rise buildings made of concrete and protected steel. Type 2: Non-combustible: Newer buildings with tilt slab or reinforced masonry walls and a metal roof. Type 3: Ordinary: New or old buildings with non-combustible walls but a wood-framed roof.
Is lightweight drywall fire-rated?
Lightweight 5/8″ drywall is not ordinarily Type-X: usually, to achieve a fire-rated wall with lightweight 5/8″ drywall, you need to apply the drywall as if it is 1/2″ drywall.
Is all drywall fire rated?
Although all drywall is fire resistant to a degree, type-X and type-C drywall are designed specifically to be used in fire-rated assemblies. These products help to contain fire in the area of its origin much better than regular drywall.
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How do you Fireproof an interior wall?
What is the most commonly used fire-resistant material for interior walls? Gypsum board, also known as drywall, is the most commonly used fire-resistant interior finish. Type X gypsum board is treated with additives to improve its fire-resistance property, making it a popular choice.
How can I get a 30 minute fire rating?
If you wish to keep existing doors in place because of their architectural or historical merit, these will need to be upgraded to give 30 minutes’ fire resistance. This can be achieved by the application of special fire resisting paints, papers or varnishes (intumescents).
Do exterior walls need to be fire rated on both sides?
Exterior walls are required to be rated for exposure to fire from: ▪ Both sides where the separation distance is 10 feet or less.
How thick is a fire wall?
Normally a 2-inch thick firewall is assembled at least 3/4 of an inch away from the wood-stud or steel-stud framing. This allows space for fire-blocking product to be installed between the floor levels.
Can you use fire rated drywall around fireplace?
Drywall + Fireplace = House Fire
Unfortunately, this is highly flammable and is not an appropriate or safe fireplace surround. The sheetrock had to be removed and replaced with any type of non-combustible surround – stone, tile, marble, or metal.
What’s the difference in sheetrock and drywall?
Drywall is a flat panel made of gypsum plaster sandwiched in between two sheets of thick paper. It adheres to metal or wood studs using nails or screws. Sheetrock is a specific brand of drywall sheet. These terms are often used interchangeably.
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.
What walls should be fire rated?
A: Yes, any space requiring an area separation wall (a wall separating adjacent living units) like apartments, condos and townhouses, uses a fire-rated system. They are also required in any egress area in the apartment building.
Why is commercial drywall hung vertically?
Commercial: Hang the drywall vertically. On commercial jobs, fire codes often require seams to fall on the entire length of the framing, so the drywall must be hung vertically.
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How do you make drywall fire resistant?
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.
When should you double drywall?
Double or multiple layers of drywall are sometimes required for increased fire resistance or for reduced sound penetration. You can secure all layers with fasteners in the standard manner, but a good alternative is to use adhesive to attach the outermost, or “face,” layer.
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