John, thank you. That is new to the 13 edition. 
This clears things up a bit. 

Sent from my iPhone
G Tim Stone


> On Oct 1, 2013, at 4:05 PM, [email protected] wrote:
> 
> It is defined.  See 3.3 18.  in the 2013 edition.
> 
> John Hoffman P.E. | Fire Protection Engineer | Facility Engineering 
> Services, KCP, LLC - Burns & McDonnell Engineering | National Nuclear 
> Security Administration's Kansas City Plant | Operated by Honeywell FM&T | 
> 2000 E. 95th St | Kansas City, MO  64131 | ph 816-997-7213 | 
> [email protected]
> 
> 
> 
> From:   "G. Tim Stone" <[email protected]>
> To:     <[email protected]>
> Date:   10/01/2013 02:58 PM
> Subject:        Continuous Obstruction
> Sent by:        [email protected]
> 
> 
> 
> Can someone please provide me a definition for the term "Continuous
> Obstruction" as referenced in NFPA 13, 13D or 13R.
> 
> I wonder why this is not defined in NFPA 13, Chapter 3.
> 
> Are round semispherical surface mounted light fixtures (found in 
> residential
> dwelling units) considered such? 
> 
> 
> 
> Thank you in advance.
> 
> 
> 
> 
> 
> Regards,
> 
> G. Tim Stone
> 
> 
> 
> G. Tim Stone Consulting, LLC
> 
> NICET Level III Engineering Technician
> 
> Fire Protection Sprinkler Design
> 
> and Consulting Services
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> 
>                117 Old Stage Rd. - Essex Jct., VT. 05452
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