Correspondence City of Tigard, Oregon • 13125 SW Hall Blvd. • Tigard, OR 97223
February 5, 2007 i
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tr3 ."a r s _IS_r s
Delta Fire Inc.
Brian Olson
14795 SW 72n Ave.
Portland, OR 97224
RE: NEW FIRE SPRINKLER SYSTEM — BUILDING B
Project Information
Building Permit: BUP2006 -00534 Construction Type: II -B
Tenant Name: OPUS Northwest Occupancy Type: B
Address: 16083 SW Upper Boones Ferry Occupant Load: 532 +
Area: 55,387 sq ft Stories: 3
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.
TESTING :: - Section 16.2.1
Hydrostatic testing of the system shall occur at sprinkler fmal. 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.
2. A hydraulic calc plate shall be affixed to the sprinkler riser.16.5
WATER-FLOW ALARMS: - OSSC 903.4 NFPA 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.
An audible water flow alarm is required on the exterior of the building and in the interior of the
building -in a normally occupied location to alert the occupants. OSSC Sec 903.4.2, 1109.14.2.
Phone: 503.639.4171 • Fax: 503.684.7297 • www.tigard- or.gov • TTY Relay: 503.684.2772
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.
HANGERS: NFPA sec. 9.2
5. The maximum distance between hangers shall not exceed that specified in Table 9 -2.2.
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 '/z" pipe.
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.
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.
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
9. 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
10. 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
11. 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
12. 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
PIPING CLEARANCE: - Section 9.3.4
13. 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" larger than the pipe for 1" nominal to 3 1" nominal and 4"
larger than the pipe for pipe 4" nominal and larger. Clearance from structural members not penetrated
or used, collectively or independently, to support the piping shall be at least 2 ".
Exceptions
Where clearance is provided by a pipe sleeve, a nominal diameter 2" lager than the nominal diameter of the pipe is
acceptable for pOe sizes 1" through 3 %z' and the clearance provided by a pipe sleeve of nominal diameter 4" larger than
the nominal diameter of the pipe is acceptable for pOe sizes 4" and larger.
No clearance is necessary for pOingpassing through gypsum board or equally frangible construction that is not required
to have a fire resistance rating.
No clearance is necessary if flexible couplings are located within 1 ft of each side of a rag floor, platform, or
foundation.
SPARE SPRINKLERS: - Section 6.2.9
14. 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
SYSTEM, MAIN DRAINS, or SECTIONAL DRAINS: - Section 8.15.2.4
15. Provisions shall be made to properly drain all parts of the system. Drains shall discharge either to the
outside or to a drain connection.
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.
Respec ( y, 1
Val t enlel,
Senior - ans Examiner