GRAPH A
MAXIMUM PERMITTED VERTICAL DISTANCE BETWEEN THE SPRINKLER MOUNTING SURFACE AND
THE BOTTOM OF CEILING MOUNTED OBSTRUCTIONS SUCH AS BEAMS, OVERHANGS, AND LIGHT FIXTURES
WITHOUT UNDULY OBSTRUCTING THE WATER SPRAY DISTRIBUTION
NOTES:
1.
CEILING OBSTRUCTIONS MUST BE SPACED ON THE BASIS OF USING THE MAXIMUM RESIDUAL PRESSURE WHICH WOULD BE
PRESENT FOR A SINGLE SPRINKLER OPERATION.
2.
BEAMS AND/OR OTHER CONTINUOUS OBSTRUCTIONS ARE NOT TO EXCEED A VERTICAL DEPTH ‘V’ OF MORE THAN 3 INCHES
WITHIN THE SPRINKLER COVERAGE AREA.
STAR SPRINKLER
Page 6
1-3.2.30
Horizontal
Vertical
Distance from
Clearance
Sprinkler to
Below
Obstruction
Sprinkler
Below Sprinkler
Deflector, in.
Deflector, ft.
More than 6
24
From 3 to 6
19
Between 2 and 3
16
From 1 to 2
13
Less than 1
10
TABLE B
MINIMUM VERTICAL
CLEARANCE BETWEEN
TOP OF FREE STANDING
OBSTRUCTION AND
SPRINKLER DEFLECTOR
FIGURE 5
W-TYPE 7 SPRINKLER
WRENCH
RECESS
WRENCH
WITH SPRINKLER
ENGAGEMENT
IN TO ENSURE
WRENCHING AREA
PUSH WRENCH
OBSOLETE
