Correspondence (74140, June 21, 2006
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CITY OF TIGARD
OREGON
Delta Fire Inc.
14795 SW 72n Ave.
Portland, OR 97224
RE: FIRE SPRINKLER SYSTEM MODIFICATION - REVIEW
Project Information
Building Permit BUP2006 -00245 Construction Type: 5B
Tenant Name: Hemcon Occupancy Type F 1
Address: 10575 SW Cascade Ave # 130 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 2004 edition; and NFPA 13. The submitted plans are approved subject to the following.
TESTING - Section 16.2.1
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.
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.
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 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
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.
HANGERS:
4. The maximum distance between hangers shall not exceed that specified in Table 9 -12.
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
5. 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
6. 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
7. 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 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 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)
PIPING CLEARANCE: - Section 9.3.4
8. Where pipe passes through holes in platforms, foundations, walls, or floors, the holes shall be sized such
that the diameter of the holes is 2 in. (50 mm) larger than the pipe for 1 in. (25 mm) nominal to 31/2 in.
(89 mm) nominal and 4 in. (100 mm) larger than the pipe for pipe 4 in. (100 mm) nominal and larger.
Clearance from structural members not penetrated or used, collectively or independently, to support the
piping shall be at least 2 in.
SPARE SPRINKLERS: - Section 6.2.9
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.
Respectfull
Val Henzel, Senior Plans Examiner