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to the ground from parts or portions of the <br /> building shall conform to those permitted by the <br /> Uniform Building Code and those materials and <br /> types of construction specified in Section 7 -5- <br /> 865. <br /> (2) Connections. Materials and connectors used for <br /> interconnection of parts and portions of the <br /> building shall conform to the Uniform Building <br /> Code. Nails may be used as part of an approved <br /> connector. <br /> (3) Unreinforced Masonry Walls. Except as modified <br /> herein, unreinforced masonry walls shall be <br /> analyzed as specified in Section 2406, 2407 and <br /> 2408 to withstand all vertical loads as specified <br /> in Chapter 23 of the Uniform Building Code in <br /> addition to the seismic forces required by this <br /> Article. The 50 percent increase in the seismic <br /> force factor for shear walls as specified in <br /> Section 2407(h)4F of the Uniform Building Code may <br /> be omitted in the computation of seismic loads to <br /> existing shear walls. No allowable tension stress <br /> will be permitted in unreinforced masonry walls, <br /> except as specified in Section 7 -5 -860. Walls <br /> not capable of resisting the required design <br /> forces specified in this Article shall be <br /> strengthened or shall be removed and replaced. <br /> (4) Unreinforced Masonry Infill Walls. Unreinforced <br /> masonry infill walls shall be analyzed for both <br /> in -plane and out -of -plane seismic forces per <br /> Section 7 -5 -865. Infill walls not capable of <br /> resisting the required design forces shall be <br /> strengthened or shall be removed and replaced. If <br /> infill walls are removed, the space frame shall be <br /> capable of resisting 3/4 of the required design <br /> loads per Section 7- 5- 1150A(a) alone, or shall be <br /> strengthened. <br /> EXCEPTION: Frame and Masonry Infill in.Combination. If the <br /> stiffness of the frame alone under 2.25 times the required design <br /> loads (per Section 7 -5 -855) results in a deflection of no more <br /> than 1/360 times the story height, infill walls may be designed <br /> to resist out -of -plane loads only. The strength of the space <br /> frame shall be sufficient to resist 3/4 of the required design <br /> loads per Section 7 -5 -855). The frame may be strengthened and <br /> stiffened by bracing to achieve these requirements. <br /> (g) Combination of Vertical and Seismic Forces. <br /> 8 <br />