Correspondence September 9, 2005 4
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CITY OF TIGARD
OREGON
Fisher Development Inc.
John Taber
506 SW 6 Ave. #403
Portland, OR 97204
RE: MECHANICAL SYSTEM — RIVESIONS - REVIEW
Project Information
Building Permit: MEC2005 -00396 Construction Type: 2 -B
Tenant Name: Williams - Sonoma Inc. Occupancy Type: M
Address: 9367 SW Washington Sq Occupant Load: 140
Area: 5,315 sq ft Stories: 2
The plan review was performed under the State of Oregon Mechanical Specialty Code
(OMSC) 2002 edition; The submitted plans are approved subject to the following.
1. Equipment and appliances shall be installed as required by the terms of their approval,
in accordance with the conditions of the listing, the manufacturer's installation
instructions and this code. Manufacturer's installation instructions shall be available
on the job site at the time of inspection. OMSC 304.1
2. Gas piping systems under 14 inches water column pressure, shall be tested at a pressure of
not less than 10 pounds per square inch gage. Test pressures shall be held for not less
than 15 minutes with no perceptible drop in pressure. For welded piping, and for piping
carrying gas at pressures exceeding 14 inches water column pressure, the test pressure
shall be at least 60 pounds per square inch for not less than 30 minutes.
OMSC C406.4.1
3. Smoke detectors shall be installed in return air systems with a design capacity greater
than 2000 cfm. Upon activation, the smoke detector shall shut down the air distribution
system. Smoke detectors shall be connected to a fire alarm system and shall activate an
audible and visible alarm at a constantly attended location. OMSC 606.
4. The building or structure shall not be weakened by the installation of mechanical systems.
Where floors, walls, ceilings or any other portion of the building or structure are required
to be altered or replaced in the process of installing or repairing any system, the building
or structure shall be left in a safe structural condition in accordance with the Building
Code. The cutting, notching and boring of framing members shall comply with OMSC
302 Sections 302.3.1 through 302.5.3.
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
5. A cooling tower used in conjunction with an air conditioning appliance shall be installed
in accordance with the manufacturer's installation instructions. OMSC 908.1
6. Hydronic piping systems other than ground source heat pump loop systems shall be tested
hydrostatically at one and one half times the maximum system design pressure, but not
less than 100 psi (689 kPa). The duration of each test shall be not less than 15 minutes.
• 1208.1 OMSC
7. Equipment and appliances regulated by this code requiring electrical connections shall
have a positive means of disconnect in accordance with the Electrical Code. OMSC 301.7
8. Appliances serving different areas of a building other than where they are installed shall
be permanently marked in an approved manner that uniquely identifies the appliance and
the area it serves. OMSC 304.10
9. Appliances shall be accessible for inspection, service, repair or replacement without
removal of permanent construction. OMSC 306.1
10.Condensate from cooling coils or evaporators shall be collected and discharged to an
approved plumbing fixture or disposal area. OMSC 307.1
11. Ducts shall be supported with approved hangers at intervals not exceeding 10 feet
or by other approved duct support systems designed in accordance with the Building
Code. Flexible and other factory-made ducts shall be supported in accordance with the
manufacturer's installation instructions. 603.10 OMSC
12.Metallic Ducts shall be supported in accordance with Sheet Metal & Air Conditioning
Contractors National Association, Inc. (SMACNA) — Metal and Flexible. OMSC 603.4
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. OSSC 106.4.2
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.
Respect
Val Henzel,
Senior Plans Examiner