• Home |
  • What is the construction of a 1 hour fire rated wall

What is the construction of a 1 hour fire rated wall

What is the Construction of a 1-Hour Fire Rated Wall?

Understanding the construction of a 1-hour fire rated wall is crucial for ensuring safety and compliance with building codes. This brief review will outline the positive aspects and benefits of knowing the construction details of a 1-hour fire rated wall. The information provided here is applicable for the region of the United States.

I. Importance of a 1-Hour Fire Rated Wall:

  • A 1-hour fire rated wall is designed to withstand fire exposure for at least one hour, providing essential protection and containment.
  • It helps prevent the spread of flames, smoke, and heat from one area to another, offering occupants valuable time to evacuate safely and reducing property damage.

II. Construction of a 1-Hour Fire Rated Wall:

A. Materials:

  • Gypsum Board: Used as the primary component due to its fire-resistant properties.
  • Steel Studs: Provide structural support to the wall and enhance fire resistance.
  • Fire-Resistant Insulation: Fills the wall cavity, enhancing the wall's fire rating.
  • Firestopping Materials: Seal any gaps or joints in the wall, preventing the passage of fire and smoke.

B. Assembly Steps:

  1. Frame the Wall:

    • Use

5/8 inches

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 thickness drywall for 1 hour fire rating?


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.

What is a 1 hour fire barrier?

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.

How many layers of drywall do I need for 1 hour fire rating?

For Retrofit/Remodel Projects – In lieu of specific documentation for the original structure, the Building Department may accept installation of (2) layers of 5/8” Type X drywall at one side of wall, floor/ceiling, or roof assemblies to provide the required one-hour fire rating between adjacent dwelling units.

Does a 1 hour rated wall need a fire damper?

Generally, fire dampers are required where air ducts penetrate walls that are rated for 2-hours or more. They are needed in all air transfer openings (non-ducted) in rated walls, regardless of the rating.

What does fire rated mean in construction?

A fire-rated construction product is a material that is designed to slow the spread of fire and smoke through a building. Fire-rated construction products include a variety of materials, including fireproofing, concrete, insulation, and drywall.

What is a 1 hour fire rating construction?

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.

Frequently Asked Questions

Which type of construction is considered the highest fire rating?

Type 1 structures

The most fire-resistant buildings, Type 1 structures, are constructed with concrete and protected steel, which can withstand high temperatures without collapsing.

What makes a wall 1 hour fire-rated?

One hour fire-rated walls may contain a non-combustible core and steel top and bottom. These panels are thicker than traditional building materials, such as sheetrock, and may feature a silicone finish. They're designed to be fire-resistant, yet lightweight. This makes them easy to work with, transport, and erect.

Is a 1 hour fire safe enough?

We recommend that you purchase a minimum 1 hour fire rated safe. Safes with less than a 1 hour fire rating will not provide adequate protection to survive a typical home or business fire. Why spend your hard earned money on a safe that won't protect your important valuables, guns, ammo or other items during a fire?

What are the 3 main classifications of fire rated walls?

The International Building Code (IBC) identifies three types of walls used for fire separation of areas within a building. These three wall types are Fire Walls, Fire Barriers, and Fire Partitions.

What is 60 min fire rated drywall?


Fire resistant boards are commonly made up of gypsum, which contains small amounts of water (known as water of crystallisation). In a fire, this water is driven-off, helping to keep the temperature of the fire down, and preventing rapid fire spread.


Where are fire rated walls required?

It is required for life safety purposes when protecting or sub-dividing escape routes, this may include external or internal means of escape. For example, escape corridors, stair enclosures including those with refuge areas, protected lobbies / firefighting shafts.

Where are firewalls required?

Firewalls are required in commercial and industrial buildings to slow down the progress of a fire and contain it within a smaller area.

What are the requirements for a fire wall in NFPA?

NFPA 221 states high challenged fire walls must be nonloadbearing, and must be designed to maintain structural integrity even if complete collapse of structures occur on either side of a fire wall. To maintain the structural stability, long or high fire walls may be buttressed by cross walls or built with pilasters.

Do I need a fire wall or fire barrier?

The primary purpose of a firewall is to restrict the rapid spread of fire and smoke within a single building. The firewall divides a building into different sections. During construction, the walls that separate one room from another should have fire partitions and fire barriers installed.

What walls need fire-rated drywall?

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.

What is the construction of a 1 hour fire rated wall

What determines a fire wall?

Fire walls, as defined by the IBC, are “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

What is the difference between a firewall and a fire wall?

Firewalls separated by openings such as doors and windows provide adequate ventilation. They have the highest resistance rating. Fire barriers consist of continuous layers of fire-resistant material designed to prevent heat from penetrating through openings in the barrier's surface.

Are firewalls still needed today? The Present Day. Network security systems today must exist in several different states. As networks have grown more complex, so too has the job of the Firewall. With modern business practices, personnel and organisations need to access a network from various means and locations, even perhaps the mythical 'cloud'.

What is a 1 hour firewall?

These wall panels are rated according to how long they can safely contain a fire. For instance, one-hour fire rated walls can contain a fire for one hour. Two-hour fire rated walls for two hours.

  • What does one hour construction mean?
    • The one- and two-hour ratings are intended to describe how long the assembly will maintain its structural capabilities when exposed to fire. During testing, each assembly is loaded to 100 percent of its design load and then exposed to flames to determine its endurance performance.

  • What does 2 hour firewall mean?
    • A 2-hour fire-rated wall is a wall that has been designed to resist fire for at least 2 hours. The wall may be made of brick, concrete, or other fire-resistant materials. This type of wall is typically used in commercial and industrial buildings, as well as in some residential applications.

  • What is considered a firewall in construction?
    • The National Fire Protection Association (NFPA) 221 Standard for High Challenge Firewalls, Firewalls, and Fire Barrier Walls defines a firewall as a wall separating buildings or subdividing a building to prevent the spread of fire while maintaining structural stability and offering fire resistance.

  • How thick is a 1 hour fire wall?
    • 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.

Leave A Comment

Fields (*) Mark are Required