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ORDINANCE NO. NS-16?3 <br />PAGE SEVEN <br /> <br /> (2) EXISTING ROOF, FLOORS, WALLS FOOTINGS, AND <br />WOOD FRAMING. Existing materials utilized in the described <br />configuration may be used as part of the lateral load resis- <br />ting system, provided that the stresses in these materials <br />do not exceed the values shown in Table E. <br /> <br />TABLE D <br /> <br />ALLOWABLE VALUE OF HEIGHT-THICKNESS RATIO OF <br />UNREINFg~gE~MASONRY WALLS WITH MINIMUM QUALITY <br />MORTAR .... z;. <br /> <br />Buildings with crosswalls <br />as defined by ~tion 8-2002 <br />(f) exception <br /> <br />Ail other <br />buildings <br /> <br />Walls of <br />One Story Buildings <br /> <br />16 13 <br /> <br />First Story Wall of <br />Multi-Story Buildings <br /> <br />16 15 <br /> <br />Walls in Top Story of <br />Multi-Story Buildings <br /> <br />14 9 <br /> <br />Ail Other Walls <br /> <br />16 13 <br /> <br />Footnotes: <br /> <br /> (1) Minimum quality mortar shall be determined by <br /> <br />laboratory testing in accordance with Subsection (e) of Sec- <br />tion 8-2006. <br /> <br /> (2) The wall height may be measured vertically to <br /> <br />bracing elements other than a floor or roof. Spacing of the <br />bracing elements shall be detailed to minimize the horizontal <br />displacement of the wall by components of vertical displace- <br />ments of the floor or roof. <br /> <br /> <br />