Obstructions to sprinkler discharge
Obstructions to sprinkler discharge
(OP)
Given: large room with existing heads up near roof (no drop ceiling), lots of piping and ducts below, + lots and lots of vertical boards hanging (acoustical to absorb noise of manufacturing). These boards are about 24" x 18" and are several feet below structure. The area is Ordinary Hazard, Group II. NFPA 13 does not appear to cover such obstructions as only light hazard is mentioned. I think new heads must be added at or below said boards, ducts, piping, raceways, etc. The problem is that code says heads must be at high points of the structure. Any suggestions are appreciated. Thanks.





RE: Obstructions to sprinkler discharge
A few things the hospital room curtain provision
And also 50 per cent opening and a certain distance down from the heads
Also in the book is a short vertical coming up from the floor rule
I have seen what you have just not near the book
RE: Obstructions to sprinkler discharge
Travis Mack
MFP Design, LLC
www.mfpdesign.com
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RE: Obstructions to sprinkler discharge
Would they even activate
RE: Obstructions to sprinkler discharge
https://ixquick-proxy.com/do/spg/show_picture.pl?l...
Believe it falls under 50 per cent opening and a required distance down from
The sprinkler
RE: Obstructions to sprinkler discharge
So big of opening and do far down from the head
RE: Obstructions to sprinkler discharge
Open grid ceilings do not necessarily have to be listed, although that option is open to manufacturers. NFPA 13 contains specific geometric criteria by which open grids can be placed below sprinklers. Openings must be at least 1⁄4-inch (6.4 millimeters) wide in the least dimension, and at least 70 percent open. The depth of the ceiling panels is not permitted to exceed the least dimension of the grid
openings. Minimum clearance between sprinkler deflectors and the ceiling is based on hazard classification and sprinkler spacing as follows:
For light hazard, minimum clearance is 18 inches (457 millimeters) for spacing up to 10 feet x 10 feet (3 meters x 3 meters); 24 inches (610 millimeters) for spacing up to 10 feet x 12 feet (3 meters x 3.7 meters); and 36 inches (914 millimeters) for greater sprinkler spacing. These criteria apply to both spray and old-style sprinklers. Ordinary hazard criteria apply only to the use of spray sprinklers. Minimum clearance is 24 inches (610 millimeters) for spacing up to 10 feet x 10 feet (3 meters x 3 meters) and 36 inches (914 millimeters) for greater sprinkler spacing.