Correspondence July 11, 2006 � 1.,_,
CITY OF TIGARD
OREGON
Wyatt Fire Protection, Inc.
Eugene Lathan
9095 SW Burnham
Tigard, OR 97223
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RE: FIRE SPRINKLER SYSTEM MODIFICATION - REVIEW
Project Information
BuildiniPermit: BUP2006 -10051 Construction Type: II
Tenant Name: Made In Oregon Occupancy Type: M
Address: 9589 SW Washington Sq. Occupant Load: 134
Area: 3360 +/- sq ft - • - - Stories: 1
Hazard: Ordinary Group II
The plan review was performed under the State of Oregon Structural Specialty Code (OSSC) 2004
edition, Oregon Fire Code (OFC) 2004 edition and NFPA 13. The submitted plans are approved
subject to the following.
TESTING - Section 16.2.1
1. 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.
2. 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.
WATER FLOW ALARMS: - Section 6.9.1
3. 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 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.
SPRINKLER SYSTEM MONITORING: OSSC 901.6. - NFPA 13 sec 8.16
4. 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.
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
HANGERS: NFPA 13 sec 9.2
5. The maximum distance between hangers shall not exceed that specified in Table 9 -2.2.
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 - 9.3.5.8
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.
RESTRAINT OF BRANCH LINES. - Section 9.3.6
8. 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
9. 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 sprinkler on a line
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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 (9 m)
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.
Respectful
el
Senior Plans Examiner
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