Correspondence •
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CITY OF TIGARD
July 2, 2003 ®REG ®N
Sky Heating & Air Conditioning, Inc.
1635 SE Nehalem
Portland, OR 97202
Re: Green Office Building
11560 SW 67
MEC2003 -00024
The Clair Company on behalf of the City of Tigard has performed a review of the
mechanical installation at the above referenced address. The review was
performed under the provisions of the State of Oregon Mechanical Specialty
Code, 2002 edition (OMSC) and the State of Oregon Structural Specialty Code
1998 edition (OSSC). The plans are approved subject to the following conditions.
1. All duct penetrations of shaft enclosures shall be provided with
combination smoke /fire dampers. Smoke and fire dampers shall be closed
by actuation of smoke detectors and temperature. OSSC Sections 713.10
and 713.11.
2. Duct openings into or through the required exit passageways and the exit
enclosures are prohibited except for independent ductwork serving them.
OSSC Sections 1005.3.3.5 and 1005.3.4.4.
3. Duct penetrations of the one -hour floor /ceiling assemblies shall be
provided with fire dampers. OSSC Section 713.11.
4. Dampers shall be installed in accordance with the manufacturer's
t'' installation instructions and shall be listed and labeled and shall comply
with UL 555 for fire and UL555S for smoke. Ductwork shall be connected
to damper sleeves or assemblies in such a way that collapse of the
ductwork will not dislodge the damper or impair its proper operation.
OMSC Section 607.
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
5. Dampers shall be provided with an approved means of access, large
enough to permit inspection and maintenance of the damper and its
operating parts. The access shall not affect the integrity of the fire -
resistive -rated assemblies. Access points shall be permanently identified
on the exterior by a label having letters not less than '/2 inch in height
reading: SMOKE DAMPER or FIRE DAMPER. Access doors shall be tight
fitting and suitable for the required duct construction. OSSC Section
607.5.
6. Only fire dampers labeled for use in dynamic systems shall be installed in
heating, ventilation and air- conditioning systems intended to operate with
fans on during a fire. OSSC Section 713.12.
7. Through or membrane penetrations of other fire - resistive assemblies other
than those listed above, shall be provided with approved penetration
firestops in accordance with OSSC Sections 710 and 714.
8. Smoke detectors shall be installed in the return air ducts upstream of any
filters. OMSC 606
9. A copy of the approved plans shall be on the job site at all times and
available to the City of Tigard inspectors for inspection purposes. OSSC
Section 106.4.2
If you have questions regarding this review, please call me at (503) 718 -2448.
Sincerely,
Gary Lampella
Building Official
c. Hap Watkins, Inspection Supervisor
Joe -Green Investments
Eric McMullen_ , Tualatin Valley Fire & Rescue
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