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<br />. <br /> <br />. <br /> <br />-34- <br /> <br />(d) Bearing. <br />(1) In hollOt.,. walls or cavity walls suitable provision shall be made <br />e at each line of floor beamn ahd wherever load concentrations occur, to insure <br />proper bearing. <br /> <br />t <br /> <br />t <br /> <br />. -'-' <br /> <br />t <br /> <br />(2) V/hen cavity walls or hollow walls, in which the cells of hollow <br /> <br />units are laid vertical arE' decreased in thickness, the units in the top course <br />of t he thicker walls shall be filled solidly with mortar or masonry or the exposed <br />openings in such top course shall be covered with slabs of hard burned tile or <br />concrete at least one inch in thickness or the openings may be stopped in some <br />other approved manner. <br /> <br />(e) Dt-ainage. In cavity walls the cavity shall be kept clear of <br /> <br />. <br />mortar droppings during construction. Approved flashing shall be installed and <br /> <br />adequate drainage provided to keep dampness away from the backing. <br /> <br />7. FACED 'l"lALLS. <br /> <br />(a) Material. M9.terials used for facing shall be not less than 2-1 inches <br />thick, and in no case less :in thickness than 1/8 of the height of the unit. <br />(b) Allavrable st::-esses. Where bonded to the backing as prescribed be- <br /> <br />low, the full cross section of both facing and the backing may be considered in <br /> <br />I::omputing the stresses. <br /> <br />(c) Thickness. raced walls shall be not less in thickness than is <br /> <br />required for masonry ''falls of either of the types fxxrming the facing and the b ack- <br /> <br />:Lng. \There bonded to the backing as prescribed belm'J the facing may be considered <br /> <br />a part of the wall thickne::ls. <br /> <br />(d) Bond. <br />(1) Brick facing shall be bonded to the backing as pres cribed for <br />solid masonry vralls in subsection 3 (d) of this section. <br />(2) Ashlar facing of e:i. ther natural or cast stone shall have at least <br />~~O per cent of the superficial area ex tending not less than 4 inches into the <br />backing to form bond stones~ which shall be uniformly distributed throughout the <br /> <br />wall. <br /> <br />(3) f1hen \TalIs of hollow masonry l.U1its are faced ,'lith hollow units, the. <br />facing l.U1its shall be bonded to the backi.ng as required for walls of hollow masonry <br />units in subsection 5 (c) of this section. <br />8. Attaclunent of ,3tone facing. Every projecting stone, and, except when <br />alternate courses are full b)nd courses, every stone not a bond stone Shall be <br /> <br />securely' anchored to the bac:dng with corrosion resistant metal anchors 'with a cross <br /> <br />section of not less than 0.2 square inch. There shall be at 1e ast I anchor to each <br />