How can I search for UL certified Wall-opening Protective Materials that can be used to protect electrical boxes that create a membrane penetration in fire resistance-rated wall Designs?

June 27, 2022

How can I search for UL certified Wall-opening Protective Materials that can be used to protect electrical boxes that create a membrane penetration in fire resistance-rated wall Designs?

January 31, 2022

Can I copy UL resistance-rated designs from the UL Directory to construction documents?

November 4, 2021

If the UL Wall Design (assembly) does not specify that the fire resistance-rating is from interior or exterior, does that mean it is rated for fire exposure from both sides?

May 10, 2021

Can the fastener size specified in a UL fire resistance-rated assembly be increase?

March 26, 2021

How does the cross bracing get installed in a wall assembly when the Design specifies “Cross braced at mid-height” ?

April 8, 2020

If I add an additional layer of gypsum, or increase the thickness, can I achieve a higher fire resistance rating?

April 8, 2020

What is a “Finish Rating” found on some fire-rated assemblies?

April 8, 2020

What does an * (asterisk) mean when its denoted next to a product specified in a UL Design

April 8, 2020

Can I substitute Fire-retardant-Treated Wood for Gypsum in a UL Design?

January 19, 2020

How do I know if a tested design is tested for acceptance in the United States or Canada or both?

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