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2. A duct may only penetratrior walls where unprotected openings HIL uermitted by Tbl. 705.8, <br /> 2012 IBC. <br /> Type of Min. Fire-Resistive <br /> Construction Const. Of Enclosure Proposed Proposed Material and Construction <br /> I F.R., II F.R. - 2 hour 2_ hr. t p'a t G"' ` '"i"'o' <br /> 11, 111, IV, V 1 hour hr. <br /> 3. Shaft enclosures: such grease duct systems and exhaust <br /> equipment shall have a clearance to combustible construction <br /> of not less than 18 inches and shall have a clearance to <br /> noncombustible construction of not less than 6 inches. Sec. <br /> 506.3.11. See exceptions for factory built exhaust equipment Propose Inches <br /> installed in accordance with Sec. 304.1. d 13 0 <br /> 4. Duct enclosures shall be sealed around the duct at the point of penetration and vented to the exterior <br /> through a weather-protected opening. <br /> 5. Where cleanout openings are located in ducts within a fire-rated enclosure, access openings shall be <br /> provided in the enclosure at each cleanout point. These openings shall have 1 or 2 hour fire rating, <br /> tight-fitting sliding or hinged doors with an approved sign as follows: ACCESS PANEL. DO NOT <br /> OBSTRUCT-Sec 506.3.12. <br /> L. Separation of grease duct system (506.3.5) <br /> A separate grease duct system shall be provided for each Type 1 Hood. A separate grease duct <br /> system is not required where all of the following conditions are met: <br /> 1. All interconnected hoods are located within the same story. <br /> 2. All interconnected hoods are located within the same room or in adjoining rooms. <br /> 3. Interconnecting ducts do not penetrate assemblies required to be fire-resistance rated. <br /> 4. The grease duct system does not serve solid fuel fired appliances. <br /> 1. Number of hoods vented by a single duct system: Proposed: <br /> A single duct system may serve more than one hood located in the same story of the building, <br /> provided that the interconnecting ducts do not penetrate any fire resistance rated construction <br /> and the grease duct system does not serve a solid fuel-fired appliance. <br /> 2. A hood outlet shall serve not more than a 12-foot section of hood. ® a e r u 0 <br /> p, , � <br /> M. Provide seismic restraint vertical support and attachment details. `7 t,✓`/ ,�,,,e;eoc✓J <br /> Shall be prepared by a structural engineer. (301.18 IMC; 1604& 1613 IBC; &ASCE 7-10) Ah, `1(1y <br /> N. Additional information for Type 1 hood only(507): <br /> 1. Grease filters shall be installed at minimum 45 <br /> degree angle and <br /> Equipped with drip tray and gutter beneath lower edge of Proposed ,q( Degrees <br /> filters. (507.11.2) <br /> 2. Distance between lowest edge of grease filters and <br /> cooking surface of: <br /> Exposed flames shall not be less than 2 feet. Without Proposed ,j j ft. <br /> exposed flame shall not be less than .5 ft. (Table 507.11) F/ <br /> Exposed charcoal, charbroil shall be not less than 3 Y2 ft. Proposed ft. <br /> (Table 507.11) <br /> 3. Type I hood and duct shall have clearances from Proposed II In. <br /> construction of: 3 <br /> GWB on metal stud (minimum 3"clearance required) (506.3.6, 507.9) <br /> GWB on wood stud (minimum 18"clearance required) <br /> PROTECTED <br /> UNPROTECTED(Combustible Construction) (With 1-hour Fire-Rated Material&Metal Stud <br /> Construction) <br /> Hood Min. Req. 18 in. Proposed in. ( Min. req. 3 in. Proposed in. <br /> Duct Min. Req. 18 in. Proposed % — in. ! Min. Req. 3 in. Proposed 3 in. <br /> Revised 10/08/2013 Page 4 of 5D <br />