receptacle spacing in fire rated wall.
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Re: receptacle spacing in fire rated wall.
From Volume One of the UL Fire Resistance Directory.
WALL AND PARTITION ASSEMBLIES
Metallic Eletrical Outlet Boxes
Listed single and double gang metallic outlet and switch boxes with metallic or nonmetalliccover plates may be used in bearing and nonbearing wood stud and steel stud walls with ratings not exceeding 2h. These walls shall have gypsum wallboard facings similar to those shown in Design Nos. U301,U411, and U425. The metallic outlet or switch boxes shall be securely fastened to the studs and the opening in the wallboard facing shall be cut so that the clearance between the box and the wallboard does not exceed 1/8 in. The surface area of individual metallic outlet or switch boxes shall not exceed 16 sq in. The aggregate surface area of the boxes shall not exceed 100 sq in per 100 sq ft of wall surface.
Metallic boxes located on opposite sides of walls or partitions shall be seperated by a minimum horizontal distance of 24in. This minimum seperation distance between metallic boxes may be reduced when "Wall Opening Protective Materials" (CLIV) are installed according to the requirements of their Classification.
Metallic boxes shall not be installed on opposite side of walls or partitions of staggered stud construction unless "Wall Opening Protective Materials" are installed according to the requirements of their Classification.
Roger
From Volume One of the UL Fire Resistance Directory.
WALL AND PARTITION ASSEMBLIES
Metallic Eletrical Outlet Boxes
Listed single and double gang metallic outlet and switch boxes with metallic or nonmetalliccover plates may be used in bearing and nonbearing wood stud and steel stud walls with ratings not exceeding 2h. These walls shall have gypsum wallboard facings similar to those shown in Design Nos. U301,U411, and U425. The metallic outlet or switch boxes shall be securely fastened to the studs and the opening in the wallboard facing shall be cut so that the clearance between the box and the wallboard does not exceed 1/8 in. The surface area of individual metallic outlet or switch boxes shall not exceed 16 sq in. The aggregate surface area of the boxes shall not exceed 100 sq in per 100 sq ft of wall surface.
Metallic boxes located on opposite sides of walls or partitions shall be seperated by a minimum horizontal distance of 24in. This minimum seperation distance between metallic boxes may be reduced when "Wall Opening Protective Materials" (CLIV) are installed according to the requirements of their Classification.
Metallic boxes shall not be installed on opposite side of walls or partitions of staggered stud construction unless "Wall Opening Protective Materials" are installed according to the requirements of their Classification.
Roger
growler
Senior Member
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- Atlanta,GA
Re: receptacle spacing in fire rated wall.
Roger, correct as usual. " wall opening protective materials". If they will accept it, there is a rather inexpensive way to fire-proof boxes so you can space them as you like. Graybar has fire putty in nice little sheets for about three bucks each ( enough for a 1900 box ). I have found that some of the time it's easier to fire-proof than to move the box location.
Roger, correct as usual. " wall opening protective materials". If they will accept it, there is a rather inexpensive way to fire-proof boxes so you can space them as you like. Graybar has fire putty in nice little sheets for about three bucks each ( enough for a 1900 box ). I have found that some of the time it's easier to fire-proof than to move the box location.
Re: receptacle spacing in fire rated wall.
We are using that 24" exception heavily on the condo project - some demise walls are back-to-back kitchen areas with mirrored layouts, moving boxes is NOT really an option.
We are using Hilti Putty Pads # CP 617
We are using that 24" exception heavily on the condo project - some demise walls are back-to-back kitchen areas with mirrored layouts, moving boxes is NOT really an option.
We are using Hilti Putty Pads # CP 617
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