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3.4 INSTALLATION OF REINFORCED UN1T MASONRY <br /> A. General: Install reinforced unit masonry to comply with requirements of referenced unit <br /> masonry standard. <br /> B. Temporary Formwork: Construct formwork and shores to support reinforced masonry <br /> elements during construction. <br /> 1. Construct formwork to conform to shape,line,and dimensions shown. Make sufficiently <br /> tight to prevent leakage of mortar and grout. Brace, tie, and support forms to maintain <br /> position and shape during constcuction and curing of reinforced masonry. <br /> C. Do not place grout until entire height of masonry to be grouted has atta.ined sufficient strength <br /> to resist grout pressure. <br /> D. Do not remove forms and shores until reinforced masonry members have hardened <br /> sufficiently to carry their own weight and other temporary loads that may be placed on them during <br /> construction. <br /> 3.5 REPAIRING,POINTING,AND CLEANING <br /> A. Remove and replace masonry units that are loose,chipped,broken, stained,or otherwise <br /> damaged or if units do not match adjoining units. Install new units to match adjoining units and in fresh <br /> mortar or grout,pointed to eliminate evidence of replacement. <br /> B. Pointing: During the tooling of joints,enlarge any voids or holes,except weep holes,and <br /> completely fill with mortar. Point-up all joints including comers,openings, and adjacent construction to <br /> provide a neat,uniform appearance,prepared for application of sealants. <br /> C. Final Cleaning: After mortar is thoroughly set and cured,clean exposed masonry as follows: <br /> 1. Remove large mortar particles by hand with wooden paddles and nonmetallic scrape hoes <br /> or chisels. <br /> 2. Protect adjacent stone and non-masonry surfaces from contact with cleaner by covering <br /> them with liquid strippable masking agent,polyethylene film,or waterproof masking ta.pe. <br /> 3. Clean concrete masonry by means of cleaning method indicated in NCMA T'EK 45 <br /> applica.ble to type of stain present on exposed surFaces. <br /> D. Protection: Provide fmal protection and maintain conditions,in a manner acceptable to ` <br /> Installer,that ensure unit masonry is without damage and deterioration at time of Substantial <br /> Completion. <br /> END OF SECTION 04200 <br /> UNiT MASONRY <br /> Page 6 of 6 <br />