Q = (29.83)(c)(d)2(P)
Where:
Q = GPM
c = Orifice Coefficient (rounded = .9; square = .8; projected = .7)
D = Orifice Diameter
P = Pitot Reading
www.firebyknight.com
Thursday, April 12, 2012
Wednesday, April 11, 2012
Seven Common Fire Sprinkler Design and Layout Mistakes:
1.Not using the available water supply curve to its fullest resulting in oversized piping.
2.Calculating the system for xyz sq. ft. per sprinkler and then over-spacing other sprinklers without regard for calculated area.
3.Placing sprinklers too far away from walls and obstructions resulting in over-spaced sprinklers.
4.Ignoring obstructions resulting in too few sprinklers.
5.Not using obstruction rules properly resulting in too many sprinklers.
6.Seismic bracing improperly sized, attached to structure incorrectly, and spaced without regard to the zone of influence.
7.The wrong sprinkler used in the wrong situation resulting in poor design and your dollars wasted.
www.firebyknight.com
2.Calculating the system for xyz sq. ft. per sprinkler and then over-spacing other sprinklers without regard for calculated area.
3.Placing sprinklers too far away from walls and obstructions resulting in over-spaced sprinklers.
4.Ignoring obstructions resulting in too few sprinklers.
5.Not using obstruction rules properly resulting in too many sprinklers.
6.Seismic bracing improperly sized, attached to structure incorrectly, and spaced without regard to the zone of influence.
7.The wrong sprinkler used in the wrong situation resulting in poor design and your dollars wasted.
www.firebyknight.com
Tuesday, April 3, 2012
Protection Areas Per Sprinkler - S X L
To determine the coverage along the branch line you choose the distance between sprinklers or the distance to the wall or obstruction for the end sprinkler. Then you use the distance between sprinklers or twice the distance to the wall, which ever is greater. The distance along the branch line is then defined as S.
To determine the coverage between branch lines you choose the distance between branch lines or the distance to the wall or obstruction to the side of the branch line. Then you use the distance between branch lines or twice the distance to the wall, which ever is greater. The distance between the branch lines is then defined as L.
www.firebyknight.com
To determine the coverage between branch lines you choose the distance between branch lines or the distance to the wall or obstruction to the side of the branch line. Then you use the distance between branch lines or twice the distance to the wall, which ever is greater. The distance between the branch lines is then defined as L.
www.firebyknight.com
Subscribe to:
Posts (Atom)