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Fire Resistance

Fire Resistance

Fire Resistance

(OP)
I have a project where we are trying to use an existing multi-wythe brick wall approximately 17'' wide as a 3hr rated fire wall.  Is there a numerical procedure for determining the hourly rating for a wall of this construction?  The wall is about 100 yrs old.

RE: Fire Resistance

Check out the procedures outlined in "Technical Notes 16B - Calculated Fire Resistance" published by the Brick Industry of America (http://www.brickinfo.org). It has a pretty good, and accepted, methodology for confirming that your wall is way more than 3 hrs.

RE: Fire Resistance

Chapter 9 of the IBC gives you prescritive data.

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