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September 4, 2014 Alan E.Costic,AIA September 19, 2014 Revision Lisa manse.IIDA P Richards aomwener,AlA Blake aural AIA Km Arbuckle,AA ARBUCKLE COSTIC ARCHITECTS, INC. Jim Trussell 363 Stare Street Marion County, Building Inspection Division Salem, OR 97301-3533 5155 Silverton Road NE 503/5811114 Fax. 503/581-3655 Salem, OR 97305 E-Mail:architects@arbucklecostc corn • vwmrvarbucklecoswccom RECE V En RE: McNary High School Foods Lab 2014 Project No.: 2014.0006.000 Permit No. 555 - 14-003427 MARSEPION CO19 ON (-7 BUILDING INSPECT ON Dear Jim: The McNary High School Foods Lab Renovation located at 585 Chemawa Road N. is seeking final approval of the renovation which utilizes residential equipment with Type II Exhaust Hoods. The existing building is constructed as a fire-rated non-combustible structure, with an 'E' Occupancy classification for this 2-story High School building. The Foods Lab renovations will be permitted under the 2010 Oregon Specialty Code with Amendments, and the 2010 Oregon Mechanical Specialty Code. The existing Foods Lab was comprised of original wood cabinets, 6-8 electric stove/ovens without exhaust hoods, and other varios cooking appliances. The residential (domestic) stove/ovens are are only utilized approximately 12 hours per week and have been considered light duty appliances, please refer to attached email from the Foods Lab instructor; class schedules; products cooked; and frequency. Based on the 2010 UMC Paragraph 507.2.2, Type II hoods are required for light duty appliances in this residential application. However, the Paragraph 507.2.1 requires a Type I hood over medium or heavy duty grease or smoke producing appliances, however, the Paragraph 507.2.3 exception allows for a single domestic cooking appliance under a Type II hood. The renovation to the Foods Lab could be provided with individual exhaust hoods for each piece of domestic cooking appliances. Additionally, the existing building conditions preclude the installation of excess hoods and ductwork thru the building or out the exterior wall. The Owner is requesting an approval on an Alternate Material and/or Method. The existing condition has 6-8 electric stove ovens without exhaust hoods. In lieu of providing numerous Type II hoods over individual domestic cooking appliances, the District is requesting a safer installation to provide a single Type II hood over multiple domestic cooking appliances. Refer to attached catalogue information on the new residential appliances. The requested alternative will also include increased fan and duct size, as well as filter medium within the hood that can be removed and cleaned frequently which also increase the safety to the classroom. Additionally the classroom is provided with (2) two fire extinguishers as well as (2) two ceiling mounted heat detectors. This request will save the Owner time and expense, increase safety, as well as greatly enhance the educational opportunity for each student in the Foods Lab.