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2. Reinforced concrete elements designed primarily as flexural members and <br />supporting other than light-frame wood shear wall systems or light-frame steel <br />and wood structural panel shear wall systems shall comply with Sections 1921.3.2 <br />and 1921.3.3. Strength computations for portions of slabs designed as supporting <br />elements shall include only those portions of the slab that comply with the <br />requirements of these Sections. <br />3. Masonry elements designed primarily as axial-load-carrying members shall <br />comply with Sections 2106.1.12.4, Item 1, and 2108.2.6.2.6. <br />4. Masonry elements designed primarily as flexural members shall comply with <br />Section 2108.2.6.2.5. <br />5. Steel elements designed primarily as flexural members or trusses shall have <br />bracing for both top and bottom beam flanges or chords at the location of the <br />support of the discontinuous system and shall comply with the requirements of <br />RISC-Seismic Part I, Section 9.4b. <br />Wood elements designed primarily as flexural members shall be provided with lateral bracing or <br />solid blocking at each end of the element and at the connection location(s) of the discontinuous <br />system. <br />Section 7-5-191: STORY DRIFT CALCULATION. Section 1630.10.2 of the Code is <br />deleted and replaced with the following: <br />1630.10.2 Calculated. Calculated story drift using Orβ€ž shall not exceed 0.025 times the story <br />height for structures having a fundamental period of less than 0.5 second. For structures having a <br />fundamental period of 0.5 second or greater, the calculated story drift shall not exceed 0.020/T ~i3 <br />times the story height. <br />EXCEPTIONS: <br />1. These drift limits maybe exceeded when it is demonstrated that greater drift can be <br />tolerated by both structural elements and nonstructural elements that could affect life <br />safety. The drift used in this assessment shall be based upon the Maximum Inelastic <br />Response Displacement, gym. <br />2. There shall be no drift limit in single-story steel-framed structures classified as Groups <br />B, F and S Occupancies or Group H, Division 4 or 5 Occupancies. In Groups B, F and S <br />Occupancies, the primary use shall be limited to storage, factories or workshops. Minor <br />accessory uses shall be allowed in accordance with the provisions of Section 302. <br />Structures on which this exception is used shall not have equipment attached to the <br />structural frame or shall have such equipment detailed to accommodate the additional <br />drift. Walls that are laterally supported by the steel frame shall be designed to <br />accommodate the drift in accordance with Section 1633.2.4. <br />Section 7-5-192: STORY DRIFT LIMITATION. Section 1630.10.3 of the Code is <br />deleted and replaced with the following: <br />1630.10.3 Limitations. The design lateral forces used to determine the calculated drift may <br />disregard the limitations of Formula (30-6) and (30-7) and may be based on the period <br />12 <br />