Residential highrise. The door goes full height (maybe half inch  
clearance on the top). The frame is recessed in the hard lid ceiling.

Your take is that without the lintel, the bathroom is part of the  
larger bathroom it is connected to and since the aggregate of that  
area is over 55 sf that the head must be included. In the small  
bathroom.

But, do you agree that the 8 inch lintel is a detriment if you  
consider a fire in the bathroom?

Since we should not even consider a fire in the bathroom( low  
probability, size etc. ) then the question is... does the absence of  
the lintel hinder the activation of heads when we consider a fire in  
the adjoining space? This could be due to the additional volume of the  
55sf bathroom needing to fill and may slightly delay the operation of  
the heads in the sprinklered space. I would guess that due to the  
small volume of the non-sprinklered space that the delay would be small.

I think I will have to do some fire modeling to make this point to our  
inspector. I will share the results when complete.

Thanks for all of the input.

Justin D. Reid, P.E.
RLH Fire Protection
16735 Saticoy St. #110
Van Nuys, CA 91406
213-798-0251

Sent from my iPhone

On Aug 11, 2009, at 10:33 AM, "Dave Phelan" <[email protected]> wrote:

> Sorry - meant to add one other item ....
>
> Not knowing the occupancy of the building but sounds like  
> residential - the
> bathroom exception applies within the dwelling unit.  Does this  
> lintel-less
> space open into a public corridor or public area?  Wouldn't we be
> suppressing this public bathroom then anyway ?
>
> If it is single family 13D type system then I might be more inclined  
> to
> allow the head to be omitted under the 55Ft2 rule - is there some  
> technical
> difficulty with providing a lintel - even decorative- anyway?  I can't
> imagine this door is a full height frameless clear glass door but  
> then again
> I don't know much about architecture !!
>
>
>
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