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DocuSign Envelope ID: B94F2D40-3B3C-47A7-86C2-6F1 B4F92C62C <br /> SECTION 04 01 20.63 —BRICK MASONRY REPAIR <br /> 1.10 QUALITY ASSURANCE <br /> A. Brick Masonry Repair Specialist Qualifications: Engage an experienced brick masonry repair firm to perform work of <br /> this Section. Firm shall have completed work similar in material, design, and extent to that indicated for this Project <br /> with a record of successful in-service performance. Experience in only installing masonry is insufficient experience <br /> for masonry repair work. <br /> 1. Field Supervision: Brick masonry repair specialist firm shall maintain experienced full-time supervisors on <br /> Project site during times that brick masonry repair work is in progress. <br /> 2. Brick Masonry Repair Worker Qualifications: [When bricks are being patched, assign at least one worker <br /> per crew who is trained and certified by manufacturer of patching compound to apply its products] <br /> <Insert requirement>. <br /> B. Quality-Control Program: Prepare a written quality-control program for this Project to systematically demonstrate <br /> the ability of personnel to properly follow methods and use materials and tools without damaging masonry. Include <br /> provisions for supervising performance and preventing damage. <br /> C. Mockups: Prepare mockups of brick masonry repair to demonstrate aesthetic effects and to set quality standards <br /> for materials and execution and for fabrication and installation. <br /> 1. Masonry Repair: Prepare sample areas for each type of masonry repair work performed. If not otherwise <br /> indicated, size each mockup not smaller than two adjacent whole units or approximately 48 inches (1200 mm) <br /> in least dimension. Construct sample areas in locations in existing walls where directed by Architect unless <br /> otherwise indicated. Demonstrate quality of materials, workmanship, and blending with existing work. Include <br /> the following as a minimum: <br /> a. Replacement: [Four] <Insert number> brick units replaced. <br /> b. Patching: Three small holes [at least 1 inch (25 mm) in diameter] [as directed] <Insert size> for each <br /> type of brick indicated to be patched. <br /> 2. Approval of mockups does not constitute approval of deviations from the Contract Documents contained in <br /> mockups unless Architect specifically approves such deviations in writing. <br /> 3. Subject to compliance with requirements, approved mockups may become part of the completed Work if <br /> undisturbed at time of Substantial Completion. <br /> 1.11 PRECONSTRUCTION TESTING <br /> A. Preconstruction Testing Service: [Owner will engage] [Engage] a qualified testing agency to perform <br /> preconstruction testing on brick masonry as follows: <br /> 1. Provide test specimens as indicated and representative of proposed materials and existing construction. <br /> 2. Replacement Brick: Test each proposed type of replacement brick according to sampling and testing methods <br /> in ASTM C67 for compressive strength, 24-hour cold-water absorption, five-hour boil absorption, saturation <br /> coefficient, and initial rate of absorption (suction). <br /> 3. Existing Brick: Test each type of existing brick indicated for replacement according to testing methods in <br /> ASTM C67 for compressive strength, 24-hour cold-water absorption, five-hour boil absorption, saturation <br /> coefficient, and initial rate of absorption (suction). Carefully remove [five] <Insert number> existing units from <br /> locations designated by Architect.Take testing samples from these units. <br /> 4. Existing Mortar:Test according to ASTM C1324, modified as agreed by testing service and Architect for Project <br /> requirements, to determine proportional composition of original ingredients, sizes and colors of aggregates, <br /> and approximate strength. <br /> 5. Temporary Patch: As directed by Architect, provide temporary materials followed by permanent repairs at <br /> locations from which existing samples were taken. <br /> 1.12 DELIVERY,STORAGE,AND HANDLING <br /> A. Deliver bricks to Project site strapped together in suitable packs or pallets or in heavy-duty cartons and protected <br /> against impact and chipping. <br /> B. Deliver packaged materials to Project site in manufacturer's original and unopened containers, labeled with <br /> manufacturer's name and type of products. <br /> C. Store cementitious materials on elevated platforms, under cover, and in a dry location. Do not use cementitious <br /> materials that have become damp. <br /> D. Store hydrated lime in manufacturer's original and unopened containers. Discard lime if containers have been <br /> damaged or have been opened for more than two days. <br /> E. Store sand where grading and other required characteristics can be maintained and contamination avoided. <br /> F. Handle bricks to prevent overstressing, chipping, defacement, and other damage. <br /> 1.13 FIELD CONDITIONS <br /> A. Weather Limitations: Proceed with installation only when existing and forecasted weather conditions permit brick <br /> masonry repair work to be performed according to product manufacturers' written instructions and specified <br /> requirements. <br /> ©BOOMERANG DESIGN 04 01 20.63-3 510 Meadowlands Drive,Hillsborough, NC <br /> BD#1835 ORANGE COUNTY,NC 12/07/2018 <br />