head spacing

[coarts]

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

 

[SprinklerDesigner2]

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)

 

[coarts]

Here is another sketch which may explain the the reasoning of why I think it is still 168 sq ft when you cut an area in half and keep the same head location. Why would one be ok but the other not?

 

[Cidona]

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')

 

[SprinklerDesigner2]

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

 

[Cidona]

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.