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5 Includes precast.concrete conforming to Section 1921.2.7. 6 Prohibited in Seismic Zones 3 and 4 except as permitted in Section 1634.2. In Seismic Zone 4 Steel IMRF, OlV)~RF and Ordinary Braced Frames are permitted as follows: a) Steel IMRF are permitted for structural systems 35 feet or less in height and the dead load of the roof, walls or floors not exceedin 35 psf each; or for single-story buildin s 60 feet or less in height with the dead load of~he roof or walls not exceeding 15 sfgeach where the moment joints of field connections are constructed of bolted end pplates; or single-family dwellings, usin light frame construction with R = 3.0 and S2o = 2.2. b) Steel OMRF are perrmtted ~or buildings 35 ft or less m height with the dead load of the roof walls or floors not exceeding 15 psf each; or single-story buildings 60 ft or less in height with the dead load of the roof or walls not exceeding 15 psf each and where the moment joints of field connections are constructed of bolted end plates. c Steel Ordinary Braced Frames are permitted for structural systems 35 ft or less in height; or penthouse structures; or single-storryy buildings 60 ft or less m height with the dead load of the roof or walls not exceeding 15 sf each. a Total height of the building including cantilevered columns. Prohibited in Seismic Zones 2A, 2B, 3 and 4. See Section 1633.2.7. Section 7-5-182: DESIGN METHODS.Section 2204 of the Code is deleted and replaced with the following: Design shall be by one of the following methods. 2204.1 Load and Resistance Factor Design. Steel design based on load and resistance factor design method shall resist the factored load combinations of section 1612.2 in accordance with the applicable requirements of section 2205. 2204.2 Allowable Stress Design. Steel design based on allowable stress design methods shall resist the factored load combinations of section 1612.3 in accordance with the applicable requirements of section 2205. Section 7-5-183: SEISMIC DESIGN PROVISIONS FOR STRUCTURAL STEEL. Section 2205.3 of the Code is deleted and replaced with following: 2205.3 Seismic Design Provisions for Structural Steel. Steel structural elements that resist seismic forces shall, in addition to the requirements of Section 2205.2 be designed in accordance with Division N. Division IV and V of Chapter 22 of the California Building Code Division IV of Chapter 22 of the California Building Code is deleted and replaced with the following: Division IV -SEISMIC PROVISIONS FOR STRUCTURAL STEEL BUILDINGS Based on Seismic Provisions for Structural Steel Buildings, of the American Institute of Steel Construction. Parts I and III, dated April 15, 1997 and Supplement No, 2, dated November 10, 2000.