Correspondence City of Tigard, Oregon ® 13125 SW Hall Blvd. • Tigard, OR 97223 �fi', �e} ;; ,, ,t '+, ,i ; `,, "
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' HVAC, Inc
5188 SE International Way
Milwaukie Or 97222 -4602
RE: NEW BUILDING MECHANICAL SYSTEM — BUILDING # B — SHELL
Project Information
Building Permit MEC2006 -00539 Construction Type: II -B
Tenant Name: OPUS Northwest Occupancy Type: B
Address: 16083 SW Upper Boones Ferry Occupant Load: 532 +
Area: 55,387 sq ft Stories: 3
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 aPP � rov 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. 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
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5. Appliances shall be accessible for inspection, service, repair or replacement without removal of
permanent construction. OMSC 306.1
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 Building Code. Flexible and other factory -made
Phone: 503.639.4171 • Fax: 503.684.7297 o www.tigard or.gov a TTY Relay: 503.684.2772
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. Every refrigerant system 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 1108.1
9. OAR 918 - 440 -0015 Refrigeration Installer Certification All persons engaged in brazing or welding
related to the installation, alteration or repair of refrigeration piping systems not regulated by the
Oregon Boiler and Pressure Vessel Program under OAR Chapter 918, Division 225, shall be certified
in accordance with the requirements of this rule.
10. Gas piping systems under 14 inches water column pressure, shall be tested at a pressure of not less
than10 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 (3484 Pa) pressure, the test pressure shall be at least 60 pounds per square inch
for not less than 30 minutes. C406.4.1
11. Where vibration isolation of equipment and appliances is employed, an approved means of
supplemental restraint shall be used to accomplish the support and restraint. OMSC 301.10
12. Condensate from cooling coils or evaporators shall be collected and discharged to an approved
plumbing fixture or disposal area. OMSC 307.1
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.
Respec
Val Henzel,
_ Senior Plans Examiner
Examiner