Roland - 

>From the IRC 2006

Under Section R317 Dwelling Unit Seperation

R317.2 Townhouses.
Each townhouse shall be considered a separate building and shall be
separated by fire--resistance-rated wall assemblies meeting the requirements
of Section R302 for exterior walls.

Exception: A common 2-hour fire-resistance-rated wall is permitted for
townhouses if such walls do not contain plumbing or mechanical equipment,
ducts or vents in the cavity of the common wall. Electrical installations
shall be installed in accordance with Chapters 33 through 42. Penetrations
of electrical outlet boxes shall be in accordance with Section R317.3.

R317.2.1 Continuity.
The fire-resistance-rated wall or assembly separating townhouses shall be
continuous from the foundation to the underside of the roof sheathing, deck
or slab. The fire-resistance rating shall extend the full length of the wall
or assembly, including wall extensions through and separating attached
enclosed accessory structures.

Ken Holsopple

>Roland wrote:

>I don't think townhouses are required to have FIRE WALLS.  John - what  
>do say????  Have to suspect your 100 to 200 year old masonary walls  
>may do the job.

>Roland



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