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11" wide firewall -what size rated door jamb?

CADGURU

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Joined
Sep 18, 2017
Messages
5
Location
MICHIGAN
i have a ul u336 area separation firewall with a width of 11-1/2" and trying to find a detail for the door jamb. should the jamb be the fill 11"+ wide or can it be a standard rated jamb fire caulked into the framed opening with gyp. board returns and the 2" liner panel tight to the inside of the frame?

the fire inspector gave no direction on what he wanted to see and a custom frame is more expensive so the owner likes the standard option. thoughts?
 

cda

Sawhorse 123
Joined
Oct 19, 2009
Messages
20,358
Location
Basement
Frame has to be rated

Would say does not have to fill entire 11 1/2.

No Fire Stop Caulk,,, install rated frame per manufacture
 

SH225

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Mar 31, 2021
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118
Location
Texas
I ordinarily show the liner panels to the throat of a standard frame. Then return the gypsum board into the opening.
 

redeyedfly

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Feb 22, 2021
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171
Location
Minneapolis, MN
I ordinarily show the liner panels to the throat of a standard frame. Then return the gypsum board into the opening.
Same. The jamb attaches to the 2" center gyp assy. The door must be structurally independent also so it can only attach to the center which is supported by burn clips. Theoretically it should stay in place if either side collapses.
 
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cda

Sawhorse 123
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Oct 19, 2009
Messages
20,358
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Basement
Same. The jamb attaches to the 2" center gyp assy. The door must be structurally independent also so it can only attach to the center which is supported by burn clips. Theoretically it should stay in place if either side collapses.
Missed that

area separation firewall
 

ADAguy

Sawhorse
Joined
Sep 11, 2013
Messages
5,863
Location
California
i have a ul u336 area separation firewall with a width of 11-1/2" and trying to find a detail for the door jamb. should the jamb be the fill 11"+ wide or can it be a standard rated jamb fire caulked into the framed opening with gyp. board returns and the 2" liner panel tight to the inside of the frame?

the fire inspector gave no direction on what he wanted to see and a custom frame is more expensive so the owner likes the standard option. thoughts?
Will the jamb be centered on the 11" or flush to one side? if flush will the face of door be more than 8" from the wall on one side?
 

SH225

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Joined
Mar 31, 2021
Messages
118
Location
Texas
Will the jamb be centered on the 11" or flush to one side? if flush will the face of door be more than 8" from the wall on one side?
The frame should be centered. The inset to a door panel in a wall like this is typically about 3 inches on the pull side and 7 inches on the push side.
 
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