Water Sprinkler Protected Areas and Hazard Classification

Maximum fire sprinkler protected area vs. classification and construction. This tool provides a comprehensive table of maximum protection areas per sprinkler based on hazard classification and ceiling/sidewall construction types.

Hazard Classification	Ceiling and Sidewall Construction	Maximum Protected Area (ft²)	Maximum Protected Area (m²)
Light	Standard pendent and upright sprinklers - Unobstructed	225	20.9
Light	Non combustible obstructed	225	20.9
Light	Combustible obstructed	168	15.6
Light	Standard sidewall sprinklers - Combustible finish	120	11.1
Light	Standard sidewall sprinklers - Noncombustible finish	196	18.2
Ordinary	Standard pendent and upright sprinklers - All	130	12.1
Ordinary	Standard sidewall sprinklers - Combustible finish	80	7.4
Ordinary	Standard sidewall sprinklers - Noncombustible or limited combustible finish	100	9.3
Extra	Standard pendent and upright sprinklers - All	100	9.3
High-piled	Standard pendent and upright sprinklers - All	100	9.3