Correspondence (2) City of Tigard, Oregon • 13125 SW Hall Blvd. • Tigard, OR 97223
November 21, 2008
•
RE: FIRE SPRINKLER SYSTEM
Proiect Information T I GARD
Building Permit: BUP2008 -00358 Construction Type: 2B
Tenant Name: Plaza West Occupancy Type: B
Address: 9600 SW Oak St. Occupant Load: NA
Area: NA Stories: 5
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 key box shall be installed in a location approved by the Fire Chief. The key box
shall be of an approved type and shall contain keys to gain necessary access as
required by the fire code official. Section 506.1 OFC. Please contact Tualatin
Valley Fire & Rescue for key box information at 503 -612 -7010
2. 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.
3. 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.
4. 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
5. 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.
6. 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'A inches. The diameter
• ` of the hole shall be 4 inches larger than the penetrating pipe for pipe sizes 4
inches and larger 2 inches is required. Sections 9.3.4.1 & 9.3.4.2 NFPA 13.
Phone: 503.639.4171 • Fax: 503.684.7297 • www.tigard- or.gov • TTY Relay: 503.684.2772
•
• 7. All valves controlling the water supply for automatic sprinkler systems and all
water flow monitoring devices shall be electrically monitored when the system
• ti serves more than 20 heads. Section 903.4 OFC
8. 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 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
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. New sprinkler system piping shall be hydrostatically tested at 200 psi and shall
. maintain that pressure without loss for two hours. Where addition or modification
is made to an existing system affecting less than 20 sprinklers this test need not
be done.NFPA13 16.2.1.1
12. All concealed spaces enclosed wholly or partly by exposed combustible
• construction shall be protected by sprinklers.
13. Sprinkler heads must have 1 inch free movement in any direction at head
penetration in ceiling tile or a flexible head design.
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.
Respectfully,
Dan Nelson, .
Senior Plans Examiner
(503) 718-2436
dann @ tgard- or.gov
v