Correspondence FILE COPY
April 26, 2004
CITY OF TIGARD
John Westfal OREGON
Dull Olson Weekes Architects
•
319 SW Washington Street, #200
Portland, OR 97204
RE: MECHANICAL EQUIPMENT @ SCIENCE REMODEL
Project Information
Building Permit: MEC2004 -00078 Construction Type: VN
Tenant Name: Tigard High School Occupancy Type: E -
Address: 9000 SW Durham Road
The plan review was performed under the State of Oregon Mechanical Specialty Code
(OMSC) 2002 edition; and the Tualatin Valley Fire & Rescue Ordinance 99 -01 (TVFR99-
01) 1999 edition. The submitted plans are approved subject to the following.
1. Fume Hoods shall be inter- connected with the make -up air system.
2. Ductwork shall be supported in accordance with Sheet Metal & Air Conditioning
Contractors National Association, Inc. (SMACNA)
3. Each appliance shall be provided with a shutoff valve separate from the appliance.
The shutoff valve shall be located in the same room and within six feet of the
appliance served. Access shall be provided to the shutoff valve. C409.5 OMSC
4. Equipment and appliances regulated by this code requiring electrical connections
shall have a positive means of disconnect in accordance with the Electrical Code.
301.7 OMSC
5. Appliances serving different areas of a building other than where they are installed
shall be permanently marked in an approved manner that uniquely identifies the
appliance and the area it serves. 304.10 OMSC
6. Appliances shall be accessible for inspection, service, repair or replacement without
removal of permanent construction. 306.1 OMSC
7 Appliances installed on roofs or elevated structures exceeding 16 feet in height shall
be provided with a permanent means of access grade or floor level. 306.5 OMSC
8. Manufacturer's installation instructions shall be available on the jobsite at the time of
inspection. 304.1 OMSC
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
9. Condensate from cooling coils or evaporators shall be collected and discharged to an
approved plumbing fixture or disposal area. 307.1 OMSC
• 10. 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. 606.2,
606.4 & 606.4.1 OMSC
11. Suspended -type unit heaters/VAV's shall be supported by non - combustible elements
that are designed and constructed to accommodate the weight and dynamic loads
920.2 OMSC
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 • •' essing the documents.
Resp-
Bri 1alo ,
Senior Plans Examiner
•
FILL uuri
/ /0 \ t�
April 15, 2004 '�I�
CITY OF TIGARD
John Westfal
Dull Olson Weekes Architects OREGON
•
319 SW Washington Street, #200
Portland, OR 97204
RE: MECHANICAL EQUIPMENT @ SCIENCE REMODEL
Project Information
Building Permit: MEC2004 -00078 Construction Type: VN
Tenant Name: Tigard High School Occupancy Type: E -1
Address: 9000 SW Durham Road
The plan review was performed under the State of Oregon Mechanical Specialty Code
(OMSC) 2002 edition; and the Tualatin Valley Fire & Rescue Ordinance 99 -01 (TVFR99-
01) 1999 edition. The following item remains and needs clarification prior to the issuance of
the permit.
•
5 Clarify membrane penetration protection where Fire wrapped, exhaust duct from
fume hood penetrates the ceiling membrane. Manufacturer's listing may have details
for this application.
RESPONSE PARTIALLY ACCEPTED
The response submitted to this item is acceptable when supplemented with drawings. I have
enclosed a copy of an International Evaluation Report. The supplemental drawings shall be in
compliance with, and clarify the items identified in the International Evaluation Report.
Detailing for the penetration at the floor /ceiling should be site specific and similar to Figure 3
of the report. The report requires 16 gauge duct, spec book says 20 gauge, page 15880 -1.
FYI I am resistant to deferring this item. I don't want to cause the contractor to rebuild
any construction if a shaft ended up being the only solution acceptable to the
contractor.
When submitting revised drawings or additional information, please attach a copy of the • 6 •
enclosed City of Tigard, Letter of Transmittal. The letter of transmittal assists the City of
Tigard in tracking and processing the documents.
Respectfully,
Brian Blalock,
Senior Plans Examiner
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
D U L L 0 L S O N W E E K E S ARCHITECTURE + INTERIORS + PLANNING
.architects inc. COPY
ECE VED
DATE: April 1, 2004 APR 0 1 2004
TO: Brian Blaylock City of Tigard CITY OF TIGARD
BUILDING DIVISION
FROM: Keith Johnson
•
COPY: Jim Little Robinson Construction
Craig Markus Cornerstone Construction Management
Scott Miller MFIA Consulting Engineers
PROJECT: MEC2004 -00078
Tigard HS Science Remodel
RE: Mechanical Review Comments - Your Letter of March 25, 2004.
Enclosed with this memo please find a reply letter from MFIA which addresses your review
comments individually as requested. We will issue a change order request for installation of fire
suppression in the fume hood exhaust ducts (Item #3) to the contractor.
Attachments also include the following:
• City of Tigard Letter of Transmittal.
• Seismic calculations for rooftop units: RTU -1, RTU -04 -2, and RTU -04 -3 (12 pages total).
• Technical information for duct wrap material (6 pages).
If you have questions about this reply, please feel free to give me a call at 503 - 226 -6950.
Thanks for your review of this portion of the project.
Ol
MEMORANDUM 319 SW WASHINGTON ST. #200 ( PORTLAND, OR 97204
t: 503 226 6950 J: 503 273 9192 I www.doua.cu'n
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FILE COPY ; m
March 31, 2004 APR 01 2004
CITY OF TIGARD
FI BUILDING DIVISION
A MEMO TO: John Westfall
INC. DOWA
SUBJECT: Tigard HS Remodel- Phase 1
City of Tigard Plan Review Response
0
In regards to the plan review comments from the City of Tigard, we have the following
N responses.
S ✓ 1) Calculations for the attachment of rooftop units are attached. Details for the
attachment are provided on detail 1 of sheet M6.1 of the construction documents.
2) The make -up air that will be interlocked with the fume hoods is provided by the
L rooftop units through a control sequence (see detail 3 on sheet M5.1). The individual
return air dampers provided per space are controlled to maintain a negative pressure
T in the classrooms relative to the corridor. When the fume hoods are in operation, the
return damper in the main duct will close allowing the air from the space to be
exhausted through the fume hood. � �v
N 3) A fire suppression system will be added in the fume hood exhaust ducts, per 510.7. Dpi°
4) The material to be used in the science and chemistry hoods include the following:
G • Hydrogen Sulfide
• Acetone
• Isopropyl Alcohol
E • Hydrochloric acid
Of these materials Isopropyl Alcohol has the lowest Lower Flammability Limit (LFL)
N of 2.0. If we are to stay below 25% of the LFL we need to provide at least 0.0002
CFM at each hood. Since each hood is sized for 750 CFM the requirements for
G dilution are met with a significant safety factor. The above information is based on a
vaporization rate of Isopropyl Alcohol of 789 onces /cu.ft. at room temperature with
I exposed surface similar to laboratory conditions. Based on this we believe the
N installation as designed exceeds code requirements.
5) Installation instructions for the fire - wrapped fume hood exhaust ducts, penetrating the
E rated ceiling, are attached.
E
R MFIA, INC.
S
Robert Russell
g \dowa architects \7104a1_tigard hs 2004\ docs\ 7104a1- m- march2604- phasel- cot- p(an- review.doc
TIDE COPY
March 25, 2004
CI FTG.2 u •
John Westfal
Dull Olson Weekes Architects OREGON
319 SW Washington Street, #200
Portland, OR 97204
RE: MECHANICAL EQUIPMENT @ SCIENCE REMODEL
Project Information
Building Permit: MEC2004 -00078 Construction Type: VN
Tenant Name: Tigard High School Occupancy Type: E -1
Address: 9000 SW Durham Road
The plan review was performed under the State of Oregon Mechanical Specialty Code
(OMSC) 2002 edition; and the Tualatin Valley Fire & Rescue Ordinance 99 -01 (TVFR99-
01) 1999 edition. The following information is required prior to the issuance of the permit.
1. Provide calculations and details for the attachment of the rooftop mechanical units.
Permanent equipment 400 lbs and over, shall have their attachments designed in
accordance with formulas in section 1632 of the Oregon Structural Specialty Code.
2. Clarify the Make -up air that will be interlocked to the exhaust fans for the fume
hoods. Section 510.5.5 OMSC.
3. The ducts serving the fume hood shall be provided with an automatic fire suppression
system unless the fumes and vapors qualify for exception of section 510.7, OMSC.
Clarify fumes and vapors.
4. Provide clarification regarding the dilution of the contaminants as required by section
510.5.4 OMSC.
5. Clarify membrane penetration protection where Fire wrapped, exhaust duct from
fume hood penetrates the ceiling membrane. Manufacturer's listing may have details
for this application.
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 tdocuments.
Respectful), j <7
an Blalock,
Senior Plans Examiner
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
A l Letter of Transmittal
Building Division
.da
City of Tigard
DATE RECEIVED:
TO: ne-I A13 6(..44,--(LOGV— RECEIVED
DEPT: BUILDING DIVISION
APR 01 2004
FROM: 151A-NISOIL) CITY OF TIGARD
BUILDING DIVISION
COMPANY: OUL- DUDO1 AnCa.
PHONE NO.: C - By:14
(DC5
RE: N,E.C, Zoo4 - ODD 72,
(Case number, site address, etc.)
To P1-40 0-5 rti 'L4 (c tib`tor),
(Project name or subdivision name and lot number)
ATTACHED ARE THE FOLLOWING ITEMS:
Additional set(s) of plans. Revisions:
Cross section(s) and details. Wall bracing and/or lateral analysis.
Floor/roof framing. Basement and retaining walls.
Beam calculations. I Engineer's calculations. - VIOC, G�r%.
Other (explain): ,t$1 7( bix MtP E* OUGT i.01.41° Trtz.44- 1"- PO
REMARKS:
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.,Reptint,Permits(per Plan
Notified Applicant:. Date':
i Building\Forms\LetterTransmittal doc 1/6/04