Correspondence 0
&Awl
May 31, 2005
FILE COPY CITY OF TIGARD
O REGON
Custom Metal Fab
Margi Williams
50602 birch Ave.
Scappoose, OR 97056
RE: MECHANICAL — EXHAUST DUCT SYSTEM FOR TYPE 1 HOOD
Project Information
Building Permit: MEC2005 -00251 Construction Type: 5B
Tenant Name: Sushi Hana Occupancy Type: B
Address: 11705 SW Pacific Hwy Occupant Load: 20
The plan review was performed under the State of Oregon Mechanical Specialty Code
(OMSC) 2002 edition; The submitted plans are approved subject to the following.
1. Provide automatic fire suppression systems for to type 1 hood prior to final inspection.
"Automatic fire suppression systems, including pre - engineered and engineered dry- and
wet - chemical fire - suppression systems, shall be listed and labeled for specific use as
protection for commercial cooking operations and shall be installed in accordance with
Section 304.1." OMSC 509.2
2. Duct- to- exhaust fan connections shall be flanged and gasketed at the base of the fan for
vertical discharge fans; OMSC 506.3.2.3
3. Duct systems serving a Type I hood shall be constructed and installed so that grease
cannot collect in any portion thereof, and the system shall slope not less than one - fourth
unit vertical in 12 units horizontal (2- percent slope) toward the hood or toward an
approved grease reservoir. OMSC 506.3.7
4. 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
5. 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
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
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.
6. 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
7. Appliances shall be accessible for inspection, service, repair or replacement without
removal of permanent construction. 306.1 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 processing the documents.
Resp 11 ,
al Henzel,
Senior Plans Examiner