Correspondence June 3, 2005 (ALI � .
CITY OF TIGARD
OREGON
Fire System West
RE: FIRE SPRINKLER SYSTEM MODIFICATION - REVIEW
Project Information
Building Permit: BUP2005 -00212 Construction Type: 5N
Tenant Name: Office Depot Occupancy Type: B
Address: 10520 SW Cascade Blvd. Occupant Load: 45
Area: xxxxsq ft Stories: 1
Hazard: Light Hazard Commodity: I
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.
1. 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
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. 6.9.1
. 3. All valves controlling the water supply for automatic sprinkler systems, pumps, tanks, water
levels and temperatures, critical air pressures and water -flow switches on all sprinkler systems
shall be electrically supervised.. OSSC 903.4 - NFPA 72
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
•
3. Provisions shall be made to properly drain all parts of the system. Drains shall discharge
either to the outside or to a drain connection. 8.15.2
4. Each fire department connection to sprinkler systems shall be designated by a sign having
raised or engraved letters at least 1 in. (25.4 mm) in height on plate or fitting reading service
design. If the FDC is remote, it shall be signed with the address served. 8.16.2.4.7
5. A hydraulic calc plate shall be affixed to the sprinkler riser.
BRACING:
6. For feed and cross mains, longitudinal sway bracing shall be spaced a maximum of 80 ft.
Lateral 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. 9.3.5 - 9.3.5.8
7. 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.
9.3.6
8. 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 ' /2" pipe. —
pressures greater than 100psi12" for steel pipe 6" for copper tubing. 9.2.3.5
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, b. For
systems with 300 to 1000 sprinklers, not fewer than 12 sprinklers, c. For systems with over
1000 sprinklers, not fewer than 24 sprinklers. 6.2.9
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.
Respectfu
e
al Henzel,
Senior Plans Examiner