Correspondence 1
September 19, 2006
CITY OF TIGARD
OREGON
Fire Systems
Jason Sampson
600 SE Maritime Ave #300
Vancouver, WA 98661
RE: FIRE SPRINKLER SYSTEM MODIFICATION - REVIEW
Project Information
Building Permit: BUP2006-00407 Construction Type: III -B
Tenant Name: Brand Inovations Occupancy Type: B
Address: 15865 SW 74 Ave Occupant Load: 148
Hazard: Light Hazard
The plan review was performed under the State of Oregon Structural Specialty Code (OSSC) 2004
edition, Oregon Fire Code 2004 edition; and 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
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.
*16.2.1.4: Modifications affecting 20 or fewer sprinklers shall not require testing in excess of system working
pressure.
WATERFLOWALARMS: - Section 6.9.1
2. Water flow alarm apparatus shall be listed for the service and so constructed and installed that any
flow of water from a sprinkler system equal to or greater than that from a single automatic sprinkler
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
of the smallest orifice size installed on the system will result in an audible alarm on the premises
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within 5 minutes after such flow begins and until such flow stops.
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. -
RESTRAINT OF BRANCH LINES. - Section 9.3.6
4. Restraint is considered a lesser degree of resisting loads than bracing and shall be provided by use of
one of the following:
(1)A listed sway brace assembly
(2)A wraparound U -hook satisfying the requirements of 6-4.5.3, Exception Number 3
(3)No. 12, 440-lb (200 -kg) wire installed at least 45 degrees from the vertical plane and anchored on
both sides of the pipe
(4)Other approved means
5. Wire used for restraint shall be located within 2 ft 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 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
6. The unsupported length between the end sprinkler and the last hanger on the line shall not be greater
than 36 inches for 1" pipe, 48inches for 1 1/4" pipe and 60 inches for 1 1/2" pipe. - 9.2.3.4
7. The last length of pipe at the end of a feed or cross main shall be provided with a lateral brace per
Section 9.3.5.3.4
HANGERS:
8. The maximum distance between hangers shall not exceed that specified in Table 9 -2.2.
9. The maximum distance between hangers for listed nonmetallic pipe shall be modified as specified in
the individual product listings.
SWAYBRACING: - Section 9.3.5 - 9.3.5.8
10. 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.
SPARE SPRINKLERS: - Section 6.2.9
11. 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.
Respectfully,
al Henzel,
Senior Plans Examiner