Correspondence 1
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July 22, 1998 CITY OF TIGARD
OREGON
J & J Mechanical
14755 SE 82nd Drive
Clackamas, OR 97015
RE: Milliken Medical Mechanical Plan Review
13200 SW Pacific Hwy.
PC #: 7-83c MEC #: 98 -0289
Submittal documents for the above referenced project have been reviewed for
conformance with the applicable 1996 Oregon Specialty Codes and other applicable
codes and standards. The following comments are noted:
I MECHANICAL
1. The attachment of permanent equipment (HVAC) supported by the building's
structural components shall be designed to resist the total design seismic forces
prescribed in Section 1603.2 of the Structural Specialty Code. Provide an
engineer's design specifying attachment requirements [OSSC, Section 106.3.2
and OMSC, Section 304.4].
2. Where required by OSSC, Section 1202.2 natural ventilation or a mechanically
operated ventilation system capable of supplying occupancy air in accordance
with OSSC, Table 12 -A shall be provided.
When proposing to use the economizer of the HVAC system with the outside air
damper set to stay partially opened to provide occupancy ventilation, the
designer shall:
A. Document within the construction plans the anticipated occupancy load
for the design of the occupancy ventilation system and,
B. Provide detail of the modification to the HVAC economizer that will
prevent the building operator from adjusting the air damper to a fully
closed position at any time and,
C. Provide design specifications for the additional energy requirements
resulting from the air damper being partially open during the heating cycle
and, •
D. Specify on the plans that the system shall operate during such times the
building or space is occupied.
i. Provide outside air specifications on revised plans.
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13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
Milliken Medical Mechanical Plan Review
PC#: 7-83c BUP#: 98-0289 •
Page #2
3. Each individual roof - mounted HVAC shall be permanently labeled as to the
areas it serves [OMSC, Section 305.5]. In addition, each unit shall be equipped
with a power disconnect. A 120 -volt receptacle shall be located within 25' of
each unit [OMSC, Section 309.1].
4. Air moving systems (combination of units), supplying air in access of 2000 CFM
to enclosed spaces, shall be equipped with an automatic shut -off. The smoke
detectors shall be supervised when .a fire detection or alarm system is provided
[OMSC, Section 608].
Please submit two copies of revised submittal documents and a letter indicating your
response to the above comments for review. Please call me at (503) 639 -4171 if you
have any questions.
Sincerely,
o ert Poskin, CBO
SENIOR PLANS EXAMINER
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