Configuration
Type of Sprinkler
NFPA 13 Edition
Obstruction Geometry
B
Vertical Distance to Obstruction
Deflector to bottom of obstruction
in
D
Width of Obstruction
Horizontal projection from wall
in
A
Horizontal Distance to Obstruction
Auto = minimum
in
Obstruction Against Wall Section
Min. Req'd Horizontal Distance (Amin)
– in
NFPA 13 figure
Narrow Obstruction?
–
≤ 24 in (600 mm) → no added protection
Sprinkler Required Below the Obstruction?
–