Correspondence City of Tigard, Oregon • 13125 SW Hall Blvd. • Tigard, OR 97223
October 18, 2007
•
RE: FIRE SPRINKLER SYSTEM
Project Information
TIGARD
Building Permit: BUP2007 -00520 Construction Type: 3 -B
Tenant Name: Westlake Consultants Occupancy Type: B
Address: 15115 SW Sequoia Ave. Occupant Load: 129
Area: NA Stories: 2
The plan review was performed under the State of Oregon Structural Specialty Code
(OSSC) 2007 edition; National Fire Protection Association, Standard 13 (NFPA 13)
2002 edition and the State of Oregon Fire Code (OFC) 2007edition.
GENERAL
1. A supply of spare sprinklers (never less than 6) shall be maintained on the
premises so that any sprinklers that have operated or been damaged in any
way can be promptly replaced. These sprinklers shall correspond to the types
and temperature ratings of the sprinklers on the property. Sections 6.2.9.1 &
6.2.9.2 NFPA 13.
2. The spare sprinklers shall be kept in a cabinet located where temperatures
will not exceed 100 degrees "F" at any time. A special sprinkler wrench shall
be provided and kept in the sprinkler cabinet to be used in the removal and
installation of sprinklers. Sections 6.2.9.3 & 6.2.9.6 NFPA 13.
3. The clearance between the deflector and the top of storage shall be 18 inches
or greater. Section 8.6.6.1 NFPA 13. The distance shall be increased to 36
inches for Large Drop sprinkler heads. Section 8.11.6 NFPA 13
4. Sprinklers shall be located a minimum of 4 inches from walls and spaced not
less than 6 feet on center. Sections 8.6.3.3 & 8.6.3.4.1 NFPA 13.
5. Clearances shall be provided around all piping extending through platforms,
foundations, walls and floors. The diameter of the hole shall be 2 inches
larger than the penetrating pipe for pipe sizes 1 inch through 3 inches. The
diameter of the hole shall be 4 inches larger than the penetrating pipe for pipe
sizes 4 inches and larger. Sections 9.3.4.1 & 9.3.4.2 NFPA 13.
6. All valves controlling the water supply for automatic sprinkler systems and all
water flow monitoring devices shall be electrically monitored when the system
serves more than 20 heads. Section 903.4 OFC
7. An approved audible sprinkler flow alarm shall be provided on the exterior of
the building in an approved location. Such sprinkler water -flow devices shall
Phone: 503.639.4171 • Fax: 503.684.7297 • www.tigard or.gov • TTY Relay: 503.684.2772
be activated by water flow equivalent to the flow of a single sprinkler of the
smallest orifice size installed in the system. Section 903.4.2 OFC
• 8. The system piping shall be braced to resist both lateral and longitudinal
horizontal seismic loads and to prevent vertical motion resulting from seismic
loads. 9.3.5.1.1 NFPA13
9. The system piping shall be braced to resist both lateral and longitudinal
horizontal seismic loads 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.
10. The end sprinkler on a line shall be restrained against excessive vertical and
lateral movement. •
11. All concealed spaces enclosed wholly or partly by exposed combustible
construction shall be protected by 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. 106.4.2 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 ully,
'0)44
Dan Nelson,
Senior. Plans Examiner