Question

If spray sprinklers are going to be used to protect a storage configuration at a density of 0.3 gpm per sq ft.,

what is the maximum allowable spacing for standard spray sprinklers?

	A.	80 sq. ft
	B.	100 sq. ft
	C.	120 sq. ft
	D.	130 sq. ft
	E.	168 sq. ft

Answer 1

It is condition of extra hazard

The maximum or minimum spacing of depends on factors such as sprinkler characteristics and sprinkler orientation.

Sprinkler head and orientation in specific directions have significant impacr on distances of sprinkler system.

Spacing requirements can also changes with the presence of combustible materials and obstruction and also the type of system like

Pipe schedule method or hydraulically designed sprinkler systems.

Table related to spacing based on 4 different hazard condition.

1) light hazard

2) Ordinary hazard

3) Extra hazard

4) High piled storage

Systems with density at or over 0.25gpm per square.ft have a 120.sq.ft maximum spacing

So the option is C) .120 sq.ft

It is based on NFPA(National Fire Protection Association)