total number of “design sprinklers” as specified in NFPA
13D or NFPA 13R.
TIA 99-1 (Tentative Interim Amendment) with an effective
date of May 22, 2000 states that the minimum required
discharge from each of the “design sprinklers” for sys-
tems designed to NFPA 13 must be calculated based on
delivering a minimum design density of 0.1 gpm/sq. ft. for
each of the listed coverage areas shown in Table A. Con-
sult with the Authority Having Jurisdiction regarding the
application of this TIA to the currently adopted NFPA 13.
For systems designed to NFPA 13, 13D, or 13R, consult
with the local authority having jurisdiction with regard to
the number of “design sprinklers” for sloped ceilings hav-
ing a slope greater than a 2 inch rise for a 12 inch run.
Spray Coverage Criteria.
Figure 2 and 3 provide spac-
ing rules that must be followed to assure that the Model
TFP1 Sprinklers will provide their design distribution of
water spray.
Sprinklers are to be located with respect to obstructions
to water distribution in accordance with extended cover-
age pendent sprinkler obstruction requirements of NFPA
13.
Operational Sensitivity Criteria.
For proper operational
sensitivity, the Model TFP1 must be installed beneath a
solid ceiling having a smooth or textured surface.
The Model TFP1 must
NOT
be used above or below open-
gridded type suspended ceilings; beneath soffits or
beams exceeding 3 inches in height; or, with beams,
joists, or ducts having a height of more than 3 inches lo-
cated within the sprinkler coverage areas. Beams having
a height of more than 3 inches may be located with their
centerlines along the boundaries separating adjacent
sprinkler coverage areas.
Cold Soldering Criteria.
Figures 2 and 3 provide the
minimum spacing requirements necessary for preventing
the wetting (i.e., cold soldering) of the heat responsive
element of a non-operated Model TFP1, which is adja-
cent to one which has operated.
Heat Source Criteria.
Refer to NFPA 13D or NFPA 13R
for the requirements relating to preventing the possible re-
lease of a Model TFP1 heat responsive element, due to
exposure to heat sources other than abnormal fire.
STAR SPRINKLER
1-3.2.50
Page 3
Figure 2-1 (Plan View)
Figure 2-2 (Plan View)
Figure 2-3 (Plan View)
Figure 2-4 (Plan View)
Figure 2-5 (Plan View)
Figure 2-6 (Plan View)
Figure 2-7 (Plan View)
Figure 2-8 (Plan View)
FIGURE 2
SPACING RULES UNDER LEVEL CEILINGS
S
=
THE LENGTH OF THE COVERAGE AREA BEING
HYDRAULICALLY CALCULATED (REF. TABLE A).
OBSOLETE
