What is a UL rated wall?
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.
Is CMU wall fire rated?
Concrete Masonry Walls do not burn. Depending on the thickness of the wall, the density of the units and the amount of grout used, concrete masonry walls can provide up to a four hour fire rating.
Is CMU 2 hour wall rated?
1 Hour Fire Rating – 6 inch C.M.U. .. 2 Hour Fire Rating – 6 inch C.M.U. 3 Hour Fire Rating – 6 inch C.M.U. ..
What is UL in fire rating?
The UL rating is an indicator of product quality and certification of safety. For example, the UL Class 350 1-hour fire rating means that the internal temperature of the safe will not exceed 350°F for at least 1 hour when exposed to external temperatures over 1700°F.
What are UL designs?
The Underwriters Laboratories (UL) bulletin distributed to its members, was jointly drafted by UL, the American Iron and Steel Institute (AISI) and AISC. It Is meant to inform the industry of updates to UL fire-rated designs that specify a “Restricted Load Condition.”
What does UL stand for?
Underwriters’ Laboratories
Underwriters’ Laboratories, or UL as it is universally known, tests and evaluates components and products that allows a certification mark to be placed by the manufacturer. Most common are the “UL Listed” and “UL Recognized” marks.
What is the purpose of a CMU?
A concrete masonry unit (CMU) is a standard-size rectangular block used in building construction. CMUs are some of the most versatile building products available because of the wide variety of appearances that can be achieved using them.
What is the fire rating of 4 CMU?
Fire Resistance Table
| FIRE RESISTANCE IN HOURS | ||
|---|---|---|
| 4″ SOLID | 100.0 | 2.0 |
| 6″ STANDARD CORES | 54.5 | 1.0 |
| 6″ SPECIAL 2-HOUR CORES | 70.0 | 2.0 |
| 6″ SOLID | 100.0 | 4.0 |
Are cinderblocks fire proof?
Concrete block can withstand high temperatures and water pressure from fire hoses better than other materials deemed fire resistant such as fiber-reinforced gypsum panels.
What makes a CMU wall fire rated?
Increasing Fire Ratings: Walls composed of hollow concrete masonry units having a nominal thickness of 8 inches or greater and having a fire resistance rating of at least 2 hours shall be classified as 4 hours when the hollow spaces are completely filled with perlite or vermiculite, grout or a material such as expanded …
What is UL safe?
U.L. Signifies a combination-locked safe designed to offer a limited degree of protection against attack by common mechanical and electrical hand tools and any combination of these means.
Can a CMU be fire rated Underwriters Laboratories?
In the event the design professional, building committee or local governing authority requires further assurance that the CMU used in fire walls are indeed Underwriters Laboratories® Fire-Rated, individual Fire-Rated CMU can be individually marked with the UL® logo.
What kind of CMU does Westbrook Block have?
Westbrook Block is a proud producer of Underwriters Laboratories® (UL®) Approved Fire-Rated CMU, both Light Weight and Normal Weight densities, in 2-, 3- and 4-hour configurations. Allowing for safe means of egress and a higher fire rating, these blocks should no longer be looked at as JUST standard grey CMU.
What is the fire resistance rating for UL?
Click on any link below to view the UL ratings. All have been tested to UL 1479 standards. The Hourly Fire Resistance Ratings listed are F Ratings. Some of our systems also have T and L Ratings. Scroll to the bottom of the page to see the definitions for each UL rating type.
Which is UL fire rated Westbrook concrete block?
Westbrook Block prides itself on manufacturing UL® Fire-Rated CMU that can be integrated into the design assemblies pictured below. u901 x902 u904 u905 u906 u910 u912 u913 u914 *Underwriters Laboratories Inc. (UL) is an independent third party product safety testing and certification organization.