Correspondence September 7, 2006
CITY OF TIGARD
OREGON
Willamette HVAC
PO Box 23334
Tigard, OR 97281
RE: MECHANICAL SYSTEM ADDITION /MODIFICATIONS
Project Information
Building Permit MEC2006 -00425 Construction Type: 3B
Tenant Name: Tan Rio Occupancy Type: M
Address: 13500 SW Pacific HWY Occupant Load: 107
The plan review was performed under the State of Oregon Mechanical Specialty Code (OMSC) 2004 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. 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.
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. OR In occupancies not required to be equipped with a fire alarm system, actuation
of a smoke detector shall activate a visible and an audible signal in an approved location. OMSC 606.
• 4. 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
5. • 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 for not less than 15 minutes with no perceptible drop in pressure. Welded
pipe and for pipe caring gas pressure greater than 14 inch 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
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
6. 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 Brdlding Code. Flexible and other factory -made
ducts shall be supported in accordance with the manufacturer's installation instructions. OMSC 603.10
7. Metallic Ducts shall be supported in accordance with Sheet Metal & Air Conditioning Contractors
National Association, Inc. (SMACNA) — Metal and Flexible. OMSC 603.4
8. Appliances shall be accessible for inspection, service, repair or replacement without removal of
permanent construction. OMSC 306.1
9. Condensate from cooling coils or evaporators shall be collected and discharged to an approved plumbing
fixture or disposal area. OMSC 307.1
Mercury Thermostats. The State of Oregon p sh bits the installation of thermostats that contain mercury in
commercial and residential buildings. "In accordance with ORS 455.355, the disposal of thermostats that contain
mercury shall be in accordance with programs established by thermostat manufacturers, their representative or
distributor, or by delivery to sites that will ensure that the mercury does not become part of the solid waste stream
or wastewater."
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.
Resp
3.9 ",
Val Henzel,
Senior Plans Examiner