Seems like a fun research project Brad for a Friday afternoon.

>From the 1955 edition,

621: Open sprinklers may be used to protect special hazards, for protection 
against exposures, or in other special locations.

777 (c): Where vertical openings are not protected by standard enclosures, 
sprinklers should be so placed as to fully cover them. This necessitates 
placing sprinklers close to such openings at each floor level.

I don't see anything else. Maybe narrows it down to 1955-1969.


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-----Original Message-----
From: Sprinklerforum [] On 
Behalf Of
Sent: Friday, April 06, 2018 12:15 PM
Subject: NFPA 13 prior to 1969 edition

Does anyone have access to 13 where the water curtain detail still required 
open sprinklers (deluge)?

I'm curious if the draft stop is required.

Besides smoke protecting the opening it occurred to me the other day the draft 
stop would help form a 'wall of water' by blocking ~9 gpm, making it drop 
straight down, and thereby providing a density of greater than 1 gpm/sf around 
the perimiter.




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