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<br /> FXS:dft j/92 (009/11) <br /> 9/14/92R <br />system with a demonstrated ability to resist differential <br />settlement and for tying the foundation elements together. <br />The minimum tie strength shall be at least ten (10 ) percent <br />of the greatest load imposed on a foundation or foundation <br />element." <br /> "Section 9.125. Sheathing for Structural Systems Al <br />and B2. For other than one- and two-story residences, wood <br />frame diaphragms and shear walls for Structural Systems Ala, <br />Alb, B2a, and B2b shall be sheathed with plywood conforming <br />to USPS 1-83 or oriented strandboard or oriented waferboard <br />conforming to APA PRP-108. <br /> "Section 9.126. Structural Systems. In Table No. 23-0 <br />of the Uniform Building Code, revise Rw factors and H <br />factors for the following structural systems to be: <br /> Rw H <br /> A2b 4 <br /> B1 160 <br /> B3a 160 <br /> B3b 6 <br /> C3a 65 <br /> D2b 65." <br /> "Section 9.127. Concrete Tilt-Up Wall Construction. <br />Buildings that use tilt-up wall construction are to be <br />classified as structural system Type E, Undefined Systems. <br />Such construction is permitted only if it meets the <br />following criteria: <br /> 1. All columns and wall piers shall conform to <br /> Section 2625 of the Uniform Building code 1991 and <br /> especially to subsections 2625(e) and 2625(f) 9. In <br /> addition to all other requirements, the sum of wall <br /> 17 <br />