What makes a wall 2-hour rated?

What is a 2 HR 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 many layers of gypsum are needed for a 2-hour rating?

two layers
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.

How do you make 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.

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 thick is 2-hour fireproofing?

3 ¼ in.
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.

How thick is 2 hour fireproofing?

Is Half inch drywall fire rated?

The fire rating for the 1/2-inch drywall used throughout the rest of the home is 30 minutes. As an added benefit, Type X drywall absorbs sound slightly better and is slightly stronger than conventional 3/8-inch or 1/2-inch drywall.

What is a 2-hour separation wall?

Description. Area Separation Walls are non-load bearing, 2-hour and 3-hour rated vertical wall assemblies that provide fire-resistant protection between adjacent living units in apartment buildings, condominiums and townhouses.

What is the fire rating for 5/8 drywall?

1 hour
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.

How thick does drywall have to be to be fire rated?

5/8 -inch
Type X fire rated gypsum drywall that is 5/8 -inch (15.9mm) thick and installed on each side of nominal 2-inch x 4-inch (38x89mm) wood studs spaced 16-inch (400mm) o.c. or 3-5/8 inch (610 mm) steel studs spaced 24” o.c. has a minimum fire rating for the assembly of 1 hour, which is a typical requirement for many …

Where do you need to use fire rated drywall?

A: Fire-rated products are not typically used in single-family residential construction except for garages. These products are primarily used in commercial construction (high rises, office buildings, industrial, institutional) and any space requiring an area separation wall such as a hotel or multi-family home.

How much drywall do I need for 2 hour fire resistance?

Use thicker drywall for a two-hour rating, if double-sheeting is not an option, with fire-resistant insulation between the wall studs. Cover wood-framed walls with a single layer of 3/4-inch Type X drywall rated for 120 minutes of fire resistance.

How to make a two hour fire rated wall?

How to Assemble a Two-Hour Fire-Rated Wall Step 1. Double the number of Type X sheets on the wall for a simple system installed over fire-resistant fiberglass… Step 2. Use thicker drywall for a two-hour rating, if double-sheeting is not an option, with fire-resistant insulation… Step 3. Build a

What are the different types of drywall systems?

Wallforms™ Parti™ Perforations Acoustical Drywall Integrated Ceiling Systems Grid & Suspension Systems Acoustical Suspension Systems Decorative Systems & Trim Drywall Grid Systems Suspension System Moldings & Accessories Resources Ceiling Material Estimator Ceiling Comparison Guide CAD & Revit Files Ensemble™ Acoustical Drywall Ceiling All Ceilings

Is drywall fire-resistant?

All drywall is naturally fire-resistant. This building material was developed in 1916 by the U.S. Gypsum Company and is composed of a layer of gypsum plaster compressed between two sheets of heavy paper.