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Report (66) ppase ii 0 Aiznift VPtT4 6/D 6 f. 44 AMERICAN I � �'�[�e�� . 5035 SE 24`i )Avenue, Portland,Oregon 97202 P 503.239.4600 F 503.239.7038 tt11lT ON TRUST.. .. OREGON CCB:33135 I WASHINGTON AMERII*212JC/AMERIH1123R0 T TO: City of Tigard Building Division ATTN: Mark Van Domelen & Dan Nelson FROM: Brian Shea, Nate Seymour, Jared Frazier, and Mac nelson DATE: June 16, 2016 PROJECT: Burnham and Ash Apartments MEC2016-00068 SUBJECT: Alternate Method Proposal OSSC 2014 717.6.1 Project Information Building Permit: /MEC2016-00068, Construction Type: 5A Tenant Name: Burnham and Ash Apartments Occupancy Type: M Address: 12850 SW Ash Occupant Load: NA Area: NA Stories: 4 Oregon Structural Specialty Code(OSSC) 2014 Section 104.11 allows alternate design methods and materials provided that they are determined to be at least the equivalent of that prescribed in this code in quality,strength,effectiveness, fire resistance, durability and safety. In relation to Through Penetrations of Horizontal Assemblies,OSSC 2014 717.6.1 States:"In Occupancies other than Groups 1-2 and 1-3, a duct constructed of approved materials in accordance with the Mechanical Code that penetrates a fire-resistance-rated floor/ceiling assembly that connects not more than two stories is permitted without shaft enclosure protection, provided a listed fire damper is installed at the floor line or the duct is protected in accordance with Section 714.4." per the 2012 International Building Code commentary,it has been determined that this indicates that ducts complying in this way can only penetrate a single floor/ceiling assembly. In the Burnham and Ash Buildings,this code language will be employed in all scenarios on the top two floors.These penetrations will be protected in accordance with Section 714.4 by making use of the UL 1479 tested detail 3 shown on M600 of the mechanical drawings(HILTI F-C- 7043).These ducts will not make use of the exception to OSSC 2014 717.6.1. The exhaust ducts from the lower floors are shown penetrating either two or three floors and are required to make use of the exception to OSSC) 2014 Section 717.6.1 which states:"A duct is permitted to penetrate three floors or less without a fire damper at each floor, provided such duct meets all of the following requirements: 1. The duct shall be contained and located within the cavity of a wall and shall be constructed of steel having a minimum wall thickness of 0.0187 inches(0.4712 mm)(No. 26 gage). • The exhaust ductwork will meet these duct construction requirements. 2. The duct shall open into only one dwelling or sleeping unit and the duct system shall be continuous from the unit to the exterior of the building. • Each exhaust duct opens into only 1 dwelling unit. 3. The duct shall not exceed 4-inch (102 mm) nominal diameter and the total area of such ducts shall not exceed 100 square inches in any 100 square feet(9.3m2)of floor area. • The 1st and 2"d floor ducts that are 4" round duct meet the size requirement. AMERICAN 5035 SE 24`h Avenue, Portland,Oregon 97202 hHEATING, INC. Pl 503.239.4600 Fl 503.239.7038 4111" al BUILT ON TRUST OREGON CCB:33135 I WASHINGTON AMERII*212JC/AMERIH1123R0 • The remaining ducts using this exception will be additionally protected by the use of one of the following 4 options(please approve or disapprove each options—if multiple are allowed we will pick that most appropriate for the project).A corresponding detail is also provided for each option: I. Mineral wool board insulation filling the space between the duct and the wood studs to enclose the duct with fire resistant material. II. A layer of 5/8"Sheetrock mounted to the stud surface and the bottom surface of the floor/ceiling assembly above and mineral wool installed at the and bottom of the stud bay to enclose the duct. III. A layer of 5/8"Sheetrock mounted to the stud surface,the bottom surface of the floor/ceiling assembly above and the top surface of the floor/ceiling assembly below to enclose the duct. With each of these protection schemes,the rectangular duct will be protected on all six surfaces of the wall cavity.The front and back sides are also protected by sheetrock in all cases.The ducts will be protected through the floor/ceiling assemblies by the UL 1479 tested through penetration (HILTI F-C-7043)at each floor/ceiling assembly penetrated. • All of the exhaust ducts using this exception will meet the concentration requirement specified. Concentration will be determined using a 100 square foot circle(Diameter=11'3")at each location containing multiple applicable penetrations and verifying that 100 square inches of penetration area is not exceeded. 4. The annular space around the duct is protected with materials that prevent the passage of flame and hot gasses sufficient to ignite cotton waste where subjected to ASTM E 119 or UL 263 time-temperature conditions under a minimum positive pressure differential of 0.01 inch (2.49 Pa) of water at the location of the penetration for the time period equivalent to the fire-resistance rating of the construction penetrated. • In the case of the 4"exhaust ducts using this exception,this protection procedure will be followed. In the case of the remaining ducts,the annular space will be filled with mineral wool and the penetration of each floor/ceiling assembly will be protected with the HILTI F-C-7043 through penetration. 5. Grille openings in a ceiling of a fire-resistance-rated floor/ceiling or roof/ceiling assembly shall be protected with a listed ceiling radiation damper installed in accordance with Section 717.6.2.1" • The design of the exhaust duct system does not contain grille openings in fire-resistance-rated floor ceiling assemblies.All are through penetrations. We believe that our plans will require adjustment to document compliance with one of the method options. We will revise and re-issue them once one or more of the methods is approved. Respectfully, Brian Shea, Nate Seymour,Jared Frazier,and Mac Nelson American Heating, Inc. (503)239-4600 brian@americanheating.net N.Sevmour@americanheating.net iared@americanheating.net mac@americanheating.net IL °O FLOOR/CEILING ASSEMBLYFLOOR/CEILING ASSEMBLY FLOOR/CEILING ASSEMBLY 1 i_ PENETRATION,PROTECTED PENETRATION,PROTECTED PENETRATION,PROTECTED BY UL 1419 TESTED HILT] BY UL 1419 TESTED HILTI BY UL 1419 TESTED HILTI s F-C-1043 ASSEMBLY. �F-G-1043 ASSEMBLY. � —— -kF-G-1043 ASSEMBLY. IP gym"SI-EETROCK LAYER TO �"SHEETROCK LAYER TO PROTECT BOTTOM SURFACE PROTECT BOTTOM SURFACE / / ANNULAR SPACE FILLED W/ OF FLOOR/CEILING OF FLOOR/CEILING =4 / MINERAL WOOL TO PROTECT ASSEMBLY_ ASSEMBLY.. / THE STUD SURFACE I THE TOP/BOTTOM SURFACES OF STUD STUD �e THE FLOORING ASSEMBLY. .. 7 10'(MAX)x 314"KITCHEN ' EXHAUST DUCT. 64"SWEETROCK LAYER TO °1(�"SHEETROGK LAYER TO �� PROTECT STUD SUBAGE. PROTECT STUD SURFACE. � p, � e= 10'(MAX)x 314"KITCHEN 10'(MAX)x 3��s"KITCHEN e �� 0° 0 STUD EXHAUST DUCT. EXHAUST DUCT. -1 g gib, / �"SHEETROGK LAYER TO 1g MINERAL WOOL TO PROTECT PROTECT TO TOP SURFACE ;� TOP SUBAGE OF FLOOR/ �` g / CEILING ASSEMBLY. OF FLOOR/CEILING < m ASSEMBLY- Pi 1 FLOOR Y FLOOR/CEILING ASSEMBLY FLOOR/CEILING ASSEMBLY FLOOR/CEILING ASSEMBLY I`q PENETRATION,PROTECTED PENETRATION,PROTECTED PENETRATION,PROTECTED �c °IF •0 - - ,_\ BY UL 1419 TESTED HILTI / / BY UL 1419 TESTED HILTI BY UL 1419 TESTED HILTI� � F-G-1043 ASSEMBLY. l — — F-G-1043 ASSEMBLY. F-G-1043 ASSEMBLY. y-AYfb• ::;% c i STUD BAY STUD BAY STUD BAY R pi I far U c Ng 5 OPTION #1 OPTION #2 OPTION #3 � tr o m 1 g _iii ill 0� EX—IAUST PENETRATION DETAILS iii a \M-100SCALE:NONE _w�-� i 1 11 ® gog wSL U : r a 41 F. i ® � FILE: SHAFT DETAIL.DWG — M200 I EDIT: 6/21/2016 2:59 PM BY JARED I PLOT: 6/21/2016 3:00 PM BY JARED FRAZIER PERMIT SET jdi , ° `