Correspondence (5) City of Tigard, Oregon • 13125 SW Hall Blvd. • Tigard, OR 97223 t,:
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November 22, 2006
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Firestop Co.
Bruce Pearson
PO Box 230545
Tigard, OR 97281
RE: FIRE SPRINKLER SYS'IEM - REVIEW
Project Information
Building Permit: BUP2006 -00544 Construction Type: 5B
Tenant Name: Ballroom Dance Co. Occupancy Type: A3
Address: 8900 SW Commercial St. Occupant Load: 1,200 +/-
Stories: 1 + 3 Mezzanines Area: 13,734 sq ft
Hazard: Light
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: - NFPA 13 sec 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.
2. A hydraulic calc plate shall be affixed to the sprinkler riser.16.5
WATERFLOWALARMS: - OSSC 903.4, NFPA sec 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 903.4.2
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 13 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 1 /2" 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: - NFPA 13 sec 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. - NFPA 13 sec 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 ' /z" 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 :: - NFPA 13 sec 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 /2" 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" larger than the nominal diameter of the pipe is
acceptable for pipe sizes 1" through 3 1 /2 and the clearance provided by apipe 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 pOing passing through gypsum board or equally frangible construction that is not required
to have a fire resistance rating.
No clearance is necessary if flexible coup are located within 1 ft of each side of a wall, floor, platform, or
foundation.
SPARE SPRINKLERS: - NFPA 13 sec 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: - NFPA 13 sec 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.
Respectfully,
c:5
Val Henzel,
Senior Plans Examiner
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Nicoll Engineering, Inc.
PO Box 23784 Tigard, Oregon 97281 • Phone: (503) 620 -2086 • Fax: (503) 684 -3636
November 3, 2006 NEI# 06 -0313
Ballroom LLC
c/o Sellwood Trade Center
APPROVED PLANS
7122 SE Milwaukie Avenue INCLUDE UN ATT Ac IItl
Portland, OR 97202 SP`ciFICATK5N BOOK
,..._: 1 CAL( S
Attn: Jim Page = Misc DOCUMENR s
Re: Ballroom Dance Studio, 8900 Commercial Street, Tigard, OR
Fire Sprinkler System Shop Drawing Review
Reference: Drawing prepared by Nicoli Engineering, Inc., dated August 25, 2006,
Job No. 06 -0613
City of Tigard Permit No. BUB2006 -00204
Gentlemen:
As requested, we have reviewed the submitted shop drawings for the fire sprinkler
system as prepared by Firestop Co. and dated October 30, 2006.
We have reviewed the sprinkler system with respect to the areas designed by Nicoli
Engineering, Inc.: Tenant Improvements for Ballrooms A, B, & C.
Our review indicates that this sprinkler system for the area designated above would be
considered to generally conform to the plans that were prepared by this firm.
It should be realized that no holes will be allowed to be drilled in any of the beams
designated for this project unless prior approval is obtained from Nicoli Engineering, Inc.
Any holes placed in the TJI floor joist must be in strict conformance with the
requirements of Truss Joist.
The Fire Sprinkler System shall be installed per 903.2.1.3, 903.3.11 & NFPA 13.
LIMITATIONS:
It should be realized that no warranties or guarantees are either expressed or implied as
to the performance of this building in as much as Nicoli Engineering, Inc. did not
complete any design or inspection services during the construction of the existing
structure. Further, the support of the sprinkler system by the existing structure is not
part of this review and is beyond the scope of work designed by Nicoli Engineering, Inc.
X:U-060313 Ballroon Dance Studio for Jim Page's Daughter\Letters \Letter Re Fire Sprinkler System to Jim Page 110306.doc Page 1 of 2
9025 SW Center Street Tigard, OR 97223 — www.nicoliengineering.com
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If you have any further questions regarding this matter please do not hesitate to contact
this office at your earliest convenience.
Sincerely, %sp PRpF.
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cc: Firestop Company — Bruce Pearson
Robert Gray Partners, Inc. — David Hoff
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