Correspondence ' N
May 24, 2006
CITY OF TIGARD
OREGON
Protemp Associates
Bruce Butner
9788 SE 17 Ave
Portland, OR 97222
RE: MECHANICAL SYSTEM MODIFICATIONS
Project Information
Building Permit MEC2006-00197 Construction Type: VB
Tenant Name: Pac Trust Occupancy Type: B
Address: 16101 SW 72o Ave Occupant Load: 132
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. 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.
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.C406.4.1
2. 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
3. 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.
4. Smoke detectors shall be installed in return air systems with a design capacity greater than 2000
cfin. 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.
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
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5. 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
6. Every refrigerant - containing part of every system that is erected on the premises, except
compressors, condensers, vessels, evaporators, safety devices, pressure gauges and control
mechanisms that are listed and factory tested, shall be tested and proved tight after complete
installation, and before operation. Tests shall include both the high- and low- pressure sides of each
system at not less than the lower of the design pressures or the setting of the pressure relief
device(s). The design pressures for testing shall be those listed on the condensing unit, compressor
or compressor unit name - plate, as required by ASHRAE 15. OMSC 1108
7. Condensate from cooling coils or evaporators shall be collected and discharged to an approved
plumbing fixture or disposal area. 307.1 OMSC
Mercury Thermostats. The State of Oregon prohibits 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.
Respectfully,
Val Henzel,
Senior Plans Examiner