U.L. listing for one hour wall (Stucco and 5/8" type 'x' gyp)


dshall
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Never seen a "UL" listing for an as built in the field wall, these listing are usually for manufactured items and shipped to the field, like a metal fireplace. Fire rating ,yes. Some pre-manufactured walls might have one though

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32 minutes ago, dshall said:

The building  dept. is requesting it,  city of S.D>,  who else?

They probably are looking for the vertical section to show how the 1-hr separation is continuous thru the floors, ceiling, and roof, etc.

This typically is not a problem with a single family residence (garage/house) but would be with the separation of 2 or more dwelling units.

 

City of San Diego, who else?  :rolleyes:

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UL in the US and ULC in Canada are the two major testing agencies for determining the fire resistance times. Some building codes will reference some generic assemblies or membrane ratings, these however are derived from testing done through the likes of UL. In commercial just about all fire rated assemblies are specified by their UL or ULC listing. They must be constructed specifically as specified, no substitutions. The listed manufactures are under UL audit programs to ensure their components meet the requirements as they where when the test was conducted.

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Go to the gypsum board manufacturer and find the specifications for their wall assemblies (Evaluation reports) and fire rating

Look up the USG Fire-Resistant assemblies book usg.com or usgdesignstudio.com 

Go to the cement plaster manufacturer (stucco) and find the evaluation report for their product, it will include the fire wall assemblies. (icc evaluation reports)

The CBC also carries those tables just in a chapter ahead

Provide the AHJ those references, because those manufacturers have to have their products tested (UL).

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Thanks guys for the help.  This seems to be busy work.  7/8" stucco on the outside,  5/8" type x  on the inside,  2x4 @ 16 studs,  hasn't that been a one hour wall since McAuthur invaded China.

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1 hour ago, dshall said:

Thanks guys for the help.  This seems to be busy work.  7/8" stucco on the outside,  5/8" type x  on the inside,  2x4 @ 16 studs,  hasn't that been a one hour wall since McAuthur invaded China.

 

You are likely correct on that one. Most of the 2X4 wood stud systems where tested way back in the 50's & 60's. I don't believe there has been any 2X4 wood walls tested since then, it's a big issue as 2X4's are not what they used to be and it is most likely that those systems retested today with today's 2X4's would fail to meet their stated rating. No one wants to open up that can of worms.

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  • 3 months later...

On V.9 and have plans just about complete. Plan reviewer wants this shared UL info along with some additions to the MEPs (can explain). Would any professional CA designers be willing to help us take these to the finish line by adding the UL info for a shared wall... adding floor loads ... and completing MEPs? Please email me.

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  • 2 years later...
  • 6 months later...
On 6/1/2018 at 9:45 AM, dshall said:

Thanks guys for the help.  This seems to be busy work.  7/8" stucco on the outside,  5/8" type x  on the inside,  2x4 @ 16 studs,  hasn't that been a one hour wall since McAuthur invaded China.

Did we get the UL number?

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