Correspondence • t
September 5, 2006 - = IX A
CITY OF TIGARD
OR EGON
KG Investment Management
Kyle Catta
10240 SW Nimbus Ave # L-3
Tigard, OR 97223
RE: MECHANICAL SYSTEM MODIFICA'T'IONS
Project Information
Building Permit: MEC2006-00374 Construction Type: VB
Tenant Name: Solid Rock Fellowship Occupancy Type: A - 3
Address: 10500 SW Nimbus Ave Bldg "T" Occupant Load: 1800 +/-
Stories: 1
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. The building or structure shall not be weakened by the installation of mechanical systems. Where floors,
wails, 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 Balding Code. The cutting, notching and boring of framing members
shall comply with OMSC 302 Sections 302.3.1 through 302.5.3.
2. 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.
3. 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
4. NOTE: Boilers and pressure vessels and related piping are regulated by the state of Oregon Boiler
and Pressure Vessel Law (ORS 480.510 to 480.670). OMSC 1017.1 General. Steam piping is regulated
according to and under the jurisdiction of the Oregon Boiler and Pressure Vessel Law and related
administrative rules and the jurisdiction of Oregon Building Codes Division, Boiler and Pressure Vessel
Program. Water piping for hot -water heating systems and hydronics shall be installed according to OMSC
Chapter 12.
5. Hydronic piping systems shall be designed and installed to permit the system to be drained. Where the
system drains to the plumbing drainage system, the installation shall conform to the requirements of the
Plumbing Code. OMSC 1206
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
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. OMSC 1208
7. 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
8. A person engaged in the brazing or welding of refrigeration piping shall have a valid certification meeting
the requirements in OAR 918- 440 -0015. For refrigeration piping regulated by the State of Oregon Boiler
and Pressure Vessel Program, see requirements listed in OAR 918- 225 -0310. All three of these
administrative rules were effective July 1, 2001.
9. OAR 918 - 225 -0310 Refrigerant Piping Systems; Components (1) The requirements of OAR 918 -225-
0430(5) shall be enforced under this rule for all refrigerant piping systems consisting of welded, brazed or
mechanically assembled piping and piping fittings exceeding 2 inches NPS, and containing any refrigerant
chemical rated as other than A -1 or B -1 by the American Society of Heating, Refrigeration and Air
Conditioning Engineers (ASHRAE 34) as adopted by the Oregon Mechanical Specialty Code.
10. 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.
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. OMSC 603.10
12. Metallic Ducts shall be supported in accordance with Sheet Metal & Air Conditioning Contractors
National Association, Inc. (SMACNA) — Metal and flexible. OMSC 603.4
13. Appliances shall be accessible for inspection, service, repair or replacement without removal of
permanent construction. 306.1 OMSC
14. Condensate from cooling coils or evaporators shall be collected and discharged to an approved plumbing
fixture or disposal area. 307.1 OMSC
15. Guards shall be provided where appliances are located within 10 feet of the roof edge or open side of a
walking surface and such edge or open side is located more than 30 inches above the floor, roof or grade
below. The guard shall be 42 inches above the elevated surface with an intermediate rail so as not to allow
the passage of a sphere, 21 inches in diameter. 304.9
16. 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
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,
V enzel,
Senior Plans Examiner