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� <br /> ' Vaziation in Cross-Section�l Dimensions• For columns and thiclaiess of walls, from dimensions <br /> shown, do not eaceed minus 1/4" nor plus 1/2". <br /> ' Variation in Mortar Joint Thickness: Do not exceed bed joint thiclrness indicated by more than <br /> plus or minus 1/8",with a maaimum thickness limited to 1/2". Do not exceed head joint thiclrness <br /> uidicated by more than plus or minus 1/8". <br /> , 3.03 LAYING MASONRY WALLS <br /> �,ayout walls in advance for accurate spacing of surface bond pattems with uniform joint widths . <br /> ' , and to accurately locate openings,movement-type joints,retums and offsets. Avoid the use of <br /> less-than-half-size units at comers,jarnbs, and wherever possible at other locations. <br /> ' I�y.u��to comply with specified construction tolerances,with courses accurately spaced and <br /> coordinated with other work. <br /> Pattern Bond: Lay exposed masonry in the bond pattern shown or,if not shown,lay iri rnnning <br /> ' bond with vertical joint in each course centered on units in courses above and below. Lay <br /> concealed masonry with all units in a wythe in running bond or bonded by lapping not less than <br /> 2". Bond and interlock each course of each wythe at comers. Do not use units with less than <br /> ' nominal4" horizontal face dimensions at comers or jambs. <br /> S�t �ing�Resumin�Work: Rck back 1/2-unit length in each couise; do not tooth. Clean <br /> exposed surfaces of set masonry,wet units lightly (if required) and remove loose masonry units <br /> , and mortaz prior to laying fresh masonry. <br /> Built-in Work: As the work progresses,build-in items specif'ied under this and other sections of <br /> ' these specifications. Fill in solidly with masonry azound built-in items. <br /> 3.04 MORTAR BEDDING AND JOINTING: <br /> ' �hollow concrete masonry units with full mortaz coverage on horizontal and vertical face <br /> shells. Bed webs in mortar in starting course on footings and foundation walls and in all courses <br /> ' of piers, columns and pilasters, and where adjacent to cells or cavities to be reinforced or to be <br /> filled with concrete or grout. For starting courses on footings where cells are not grouted,spread <br /> out full mortaz bed including azas under cells. <br /> , Maintain joint widths shown,except for minor variations required to maintain bond alignment. If <br /> not otherwise indicated,lay walls with 3/8"joints. Cut ioints flush for masonry walls which aze to <br /> be concealed or to be covered by other materials,unless othervvise indicated. <br /> , Tool exuosed joints slightly concave using a jointer lazger than joint thiclrness,unless otherwise <br /> indicated. <br /> ' Remove masonrv units disturbed after laying; clean and reset in fresh mortaz. Do nvt pound <br /> corners or jambs to shift adjacent stretcher units which have been set in position. If adjustments <br /> aze required,remove units, clean off mortar and reset in fresh mortar. <br /> 1 <br /> ' <br /> SECTION 04200-LTrTIT MASONRY <br /> ' PAGE 5 OF 6 <br /> � <br />