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head spacing

head spacing

head spacing

(OP)
Would the area of coverage of the heads along the beam be less than 168 sq ft?  

RE: head spacing

Assuming you are talking about the area to the "northwest" of the beam then I would say not, the spacing indicated far exceeds 168 square feet.

With a 37" deep beam let's not confuse ourselves by calling it a beam, as far as I am concerned you may as well call it a wall. The heads along the wall are spaced 17' apart (12*1.414 plus a little)

 

RE: head spacing

Maybe I'm not visuallsing properly but your spacing looks like it is 155ft2. Depends on exactly what dimension is required for the pink boxes to provide coverage. Where I have placed the wall (estimate) would mean S=13'-10 1/2" (6'-5 1/4"x2) multiplied by 12'-0" (distance between sprinklers 'L')

RE: head spacing

In the second drawing it appears to be 144 sq ft to me.

RE: head spacing

coarts. I had been guessing with the wall dimensions. Had missed the 7' dimension you have shown on the lower left. Given that, I would agree that your spacing would be 168ft2.

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