How do you make a 2-hour fire rated wall?

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 UL rated assembly?

The UL Certification Mark on fire resistant products, systems and assemblies is relied on by code enforcement officials and buyers to provide confidence that products and systems meet regulatory and market requirements. It is a key differentiator for products within the exterior wall assembly market.

What makes a wall 2-hour rated?

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 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.

Does UL Listed mean fire rated?

Put simply, a UL Listing means that the manufacturer can make products that meet UL requirements. This means that you can be sure your fire pump and engine will perform when you or your customer need it most.

What is UL fire protection?

A recognized leader in fire safety and certification, UL Solutions is a full-service provider of fire safety testing and certification services for stakeholders around the world.

What is a 2 hour fire barrier?

A minimum 2-hour fire-resistance-rated fire barrier may be used to create a horizontal exit when in compliance with all of the other provisions of Section 1025. The fire barrier creates protected compartments where occupants of the building can travel to escape the fire incident.

How thickness is 2 hour intumescent paint?

2 hours structural steel fire protection at less than 1mm thickness of an intumescent coating system.

How is fireproofing thickness calculated?

There is a simple formula that is used to calculate the required fireproofing thickness based on the ratio of beam weight to heated perimeter. This is referred to as W/D, where W is the weight per foot in pounds and D is the heated perimeter in inches (not beam depth).

What is UL Class A fire rating?

Class A is the best rating that can be achieved, which is described as “effective against severe fire exposure.” The susceptibility of a roof to fire is determined using either ASTM E108 or UL 790 standard.

What is a fire rated assembly?

A. A fire-resistance rating refers to the period of time an assembly is able to contain a fire and perform its intended structural function. These ratings are determined by subjecting an assembly to a standard fire exposure as defined in ASTM E119.

What is required for a fire wall?

Other than the exceptions, vertical continuity of a firewall is required from the foundation to a point at least 30-inches above both adjacent roofs. A Firewall is similar to a Standard Firewall, but has protected openings and can have up to a 3 or 4-hour fire-resistance rating.