Quick Answer: Is Type C Drywall Fire Rated?

What’s the fire rating on 5/8 drywall?

1 hourNorm Abram replies: 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..

Why is gypsum used for drywall?

Gypsum drywall is an effective building material because gypsum is very fire-resistant. The gypsum molecule contains within it two water molecules and one calcium sulfate. … Because gypsum plaster dries so much faster than lime plaster, it is much less likely to become damaged in the process of setting up.

What is a 3 hour fire wall?

The 3-hour Area Separation Wall System is a 3-hour fire wall consisting of two layers of 1 in. … The steel H-Studs are attached to adjacent framing on each side with heat-softenable, aluminum break-away clips (ASW clips) that allow for collapse of the fire-exposed unit without collapse of the Area Separation Wall.

What does 1 hour fire rating mean?

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. … A few acceptance criteria for the test stipulate that the fire from the gas-fired furnace cannot penetrate through the assembly during the test.

Can Type C Drywall be used on walls?

FIREBLOC Type C wallboard is used as a covering material for interior walls and ceilings in residential and commercial applications that often require specific fire rated assemblies. It is designed for direct attachment by screws and or nails to wood or metal framing.

Are concrete blocks fire resistant?

Concrete Blocks are a great choice for the construction of your next masonry project. Concrete Block construction provides durability,fire resistance and thermal mass which adds to energy efficiency. Concrete block also provide high resistance to sound penetration.

What is the actual thickness of 1/2 inch drywall?

Actually… standard door jambs come in 4-9/16″ for 1/2″ drywall. And that doesn’t always work perfect as some 2×4 stock is 3-5/8″, plus figure that the drywall is not always dead tight, and the fact that drywall has to finished with mud, which can vary in thickness.

What makes a 2 hour fire rated wall?

Gypsum Board: Two (2) hour rated walls have two (2) layers of 5/8″ Type ‘X’ gypsum wallboard panels on each side of the steel studs. The “Fire Tape” product would be used as an alternative to conventional joint tape in specific systems when: 3.

What is Type C Sheetrock?

Type C is an industry phrase to designate enhanced gypsum panels that exceed the requirements for Type X gypsum board in ASTM C1396. Type C panels typically have a shrinkage-compensating additive, and when exposed to heat, the Type C gypsum board expands providing more fire-resistance at joints and seams.

Should you put drywall on ceiling or wall first?

Hang drywall on the ceiling first, then the walls. Check the ceiling for bowed joists using a 4-ft. level. Irregularities less than 1/8 in.

Is there a difference between sheetrock and drywall?

Put a bit differently: Drywall and sheetrock are really the same thing. Drywall is a panel made of gypsum plaster pressed between two thick sheets of paper. Sheetrock is a brand of drywall patented by the US Gypsum Company.

Can you hang drywall on 24 centers?

Regular half inch drywall ceilings can be hung perpendicular if joists are spaced 24 inches or less apart (*always refer to local codes). If hung parallel, the maximum spacing is 16 inches on center.

What is the fire rating of type C drywall?

Surface Burning Characteristics: Flame Spread rating of 15 and Smoke Developed rating of 0, in accordance with ASTM E 84, (UL 723, UBC 8-1, NFPA 255, CAN/ULC-S102).

What is Firecode C drywall?

ceiling applications (15.9 mm) thicknesses, USG Sheetrock® Brand Firecode® C Panels (UL Type C) are enhanced proprietary Type X panels that feature a noncombustible gypsum core that is encased in 100% recycled face and back papers that form a high strength composite design.

Is regular drywall fire rated?

Drywall is relatively fireproof, but manufacturing processes such as adding glass fibers can increase the resistance. Drywall is relatively fire resistant. It’s composed of gypsum pressed between two sheets of thick paper. Gypsum is a soft mineral that by itself is not flammable.

Can you use 1/2 inch drywall ceiling?

1/2-inch: Half-inch drywall panels are the standard thickness for interior walls, as well as ceilings. 5/8-inch: These panels are commonly used for ceilings, or for walls that require a prescribed fire-resistant rating.

How thick is a 2 hour fire rated wall?

3 1/5 inchesThe fire-resistance rating of concrete masonry walls depends on the type of aggregate used in the units. 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.

What is a 1 hour rated wall?

According to the book “Commercial Drafting and Detailing,” a typical one-hour fire rated wall consists of 2×4 studs spaced 16 inches from the center of one stud to the center of the next, covered by 5/8-inch, type X gypsum board. Type X gypsum board is wallboard to which non-combustible fibers have been added.