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Here's one for you guys. Rack sprinklers

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SprinklerDesigner2

SprinklerDesigner2

Mechanical
Joined
Nov 30, 2006
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1,279
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Back to back double row racks having solid shelves with heads 10' on center staggered between tiers of storage.

Flue space is 6" and every third set of racks straddles the building columns which are 6" steel rounds spaced 40' on centers.

What obstruction clearances apply when the sprinklers get close to the columns?

 
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If I understand what you are asking, I would just apply the "three times" rule and stay 18" away from the columns.
 
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None, see NFPA 13, 02 section 8.13.5 In-racks sprinklers not required to follow obstruction criteria of section 8.5.
 
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