Correspondence •
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• February 23, 2006 "ice- -� �
CITY OF TIG D
OREGON
Fire System West, Inc
Kevin Olson
600 SE Mantine Ave Suite 300
Vancouver, WA 98661
RE: FIRE SPRINKLER SYSTEM MODIFICATION - REVIEW
Project Information
Building Permit BUP2006 -00(C Construction Type: V -B
Tenant Name: DSW Shoes Occupancy Type: M _
Address: 16920 SW 72° Ave Occupant Load: .553
Area: 18,700 ft Stories: '1 •
Hazard: Ordinary Group •
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The plan review was performed under the State of Oregon Structural Specialty Code (OSSC) 2004
edition, Oregon Fire Code 2004 edition; and 2002 NFPA 13. The submitted plans are approved
subject to the following.
HYDROSTATIC TESTING
Hydrostatic testing of the system shall occur at sprinkler final. The contractor's material
and test certificate required by NFPA 13, 16.1 shall be completed and signed by both. the
installer and building owner.
• TESTING: - Section 16.2.1 •
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1. Unless permitted by 16.2.1.2 through 16.2.1.6, all piping and attached appurtenances subjected
to system working pressure shall be hydrostatically tested at 200 psi (13.8 bar) and shall maintain
that pressure without loss for 2 hours. Loss shall be determined by a drop in gauge pressure or .
,visual leakage. The test pressure shall be read from a gauge located at the low elevation point of
the system or portion being tested. -
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WATERFLOWALARMS: - Section 6.9.1 •
2. Water flow alarm app shall be listed for the service and so constructed installed that •
any flow of water from a sprinkler system equal to or greater than that from a single automatic
sprinkler of the smallest orifice size installed on the system will result in an audible alarm on the
premises within 5 - minutes after such flow begins and until such flow stops.
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13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772 •
SPRINKLER SYSTEM MONITORING: OSSC 901.6. - NFPA 13 sec 8.16
3. All valves controlling the water supply for automatic sprinkler systems and-water -flow
switches on all sprinkler systems shall be electrically monitored where the number of
sprinklers are more than 20.
OBSTRUCTIONS /CLEARANCES: section 8.5.5 — 8.12 •
4. Continuous or noncontinuous obstructions less than or equal to 18 inches below the sprinkler
deflector that prevent the pattern from fully developing shall comply with 8.5.5.2.2.
5. Sprinklers shall be positioned in accordance with the minimum distances and special
requirements of sections 8.6 through 8.12 so that they are located sufficiently away from
obstructions such as truss webs and chords, pipes, columns, and fixtures.
HANGERS: section 9 -2
5. The maximum distance between hangers shall not exceed that specified in Table 9 -2.2.1
6. The maximum distance between hangers for listed nonmetallic pipe shall be modified 'as.
specified in the individual product listings.
SWAY BRACING: - Section 9.3.5
7. The system piping shall be braced to resist both lateral and longitudinal horizontal seismic loads
and to prevent vertical motion resulting from seismic loads. The structural components to which
bracing is attached shall be determined to be capable of carrying the added applied seismic loads.
Sway braces shall be designed to withstand forces in tension and compression. Bracing shall be
attached directly to feed and cross mains.
8.' For feed and cross mains, longitudinal sway bracing shall be spaced a maximum of 80 ft.
Later -al sway bracing shall be spaced a maximum of 40 ft. A length of pipe shall not be braced
to sections of the building that will move differentially.
RESTRAINT OF BRANCH LINES: Section 9.3.6
2. Restraint is considered a lesser degree of resisting loads than bracing and shall be provided by
use of one 'of the following: 1'
a. A listed sway brace assembly
b. A wraparound U -hook satisfying the requirements of 6- 4.5.3, Exception Number 3
c. No. 12, 440 -lb wire installed at least 45 degrees from the vertical plane and anchored on
both sides of the pipe
d. Other approved means
3. Wire used for•restraint shall be located within 2 ft (610 mm) of a hanger. The hanger closest to a
• wire restraint shall be of a type that resists upward movement of a branch line. The end
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a
sprinkler .on a line shall be restrained against excessive vertical and lateral movement.
Where upward or lateral movement would result in an impact against the building structure,
equipment, or finish materials, branch lines shall be restrained at intervals not exceeding 30 ft.
SPARE SPRINKLERS: - Section 6.19
9. The stock of spare sprinklers shall include all types and ratings installed and shall be as follows:
a. For systems having less than 300 sprinklers, not fewer than six sprinklers
Approved Plans: 1 set of approved plans, bearing the City of Tigard approval stamp, shall be
maintained on the jobsite. The plans shall be available to the Building Division inspectors
throughout all phases of construction. 106.3.1 OSSC
When submitting revised drawings or additional information, please attach a copy of the enclosed
City of Tigard, Letter of Transmittal. The letter of transmittal assists the City of Tigard in
tracking and processing the documents.
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Respec
Val Henzel,
Senior Plans Examiner
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