1.2 TIME, MANNER AND REQUIREMENTS FOR SUBMITTING SUB-BIDS

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1 The Chocolate Factory/ SECTION MAINTENANCE OF MASONRY Division 1, General Requirements, are hereby made a part of this Section as if fully repeated herein. PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. All of the Contract Documents, including General and Supplementary Conditions and Division 1, General Requirements, apply to the work of this Section. B. Carefully examine all of the Contract Documents for requirements which affect the work of this Section. The exact scope of work in this Section cannot be determined without a thorough review of all Specification Sections and other Contract Documents. 1.2 TIME, MANNER AND REQUIREMENTS FOR SUBMITTING SUB-BIDS A. Sub-bids for work under this Section shall be for the complete work 1.3 SUB-BID REQUIREMENTS A. Each Sub-Bidder shall list in Paragraph E of the "Sub-Bid Form" the name and bid price of each person, firm or corporation performing each class of work or part thereof for which the Section of the Specifications for the Sub-Trade requires such listing, provided that, in the absence of as contrary provision in the Specifications, any Sub-Bidder may, without listing any bid price, list his own name in said Paragraph E for each such class of work or part thereof and perform that work with persons on his own payroll, if such Sub-Bidder, after Sub- Bid openings, shows to the satisfaction of the Awarding Authority, that he does customarily perform such class of work or the part thereof with persons on his own payroll and is qualified to do so. This Section of the Specifications requires that the following class(es) of work shall be listed in Paragraph E under the conditions herein. CLASS OF WORK REFERENCE PARAGRAPHS 1.04 SUMMARY Masonry Restoration & Cleaning A. The scope of restoration related repairs and repointing work as noted on the Drawings shall not be construed as relieving the Contractor of full responsibility to perform similar repairs throughout the designated work areas on all similar elements to those indicated that are found to be deficient, deteriorated, or otherwise defective, in order to preserve the building exterior to sound, weather-tight, uniform, and functional condition. B. Provide all labor, materials, services and equipment necessary to complete the work of this Section. The work includes, but is not limited to, the following: 1. Field construction mock-ups and test patches for approval. 2. Non-Chemical cleaning of exposed masonry surfaces in areas indicated on the drawings and specifications. BKA Associates, Inc

2 The Chocolate Factory/ Chemical cleaning of exposed masonry surfaces in areas indicated on the drawings and specifications. 4. Repointing of mortar joints in areas indicated on the drawings and specification. 5. Repair of damaged masonry in areas indicated on the drawings and specification. 6. Repair of damaged stone masonry in areas indicated on the drawings and specification. 7. Carefully remove, clean, and salvage existing brick for possible re-use for this project. All excess brick shall be turned over to Owner. G.C. to coordinate with Architect on storage location. C. Related Work: The following items of associated work are included in other Sections of the Construction Documents. The Construction Documents should be carefully examined for requirements which affect this section. 1. Unit Prices Section Alternates Section Testing Section Selective Demolition Section Flashing and Sheet Metal Section Joint Sealers Section SUBMITTALS A. Submit for approval: product data, samples, proposed mortar mix information for use in repointing the various joint conditions, work sequencing outline, and mockup panels. B. Field Construction Mock-Ups: Prior to start of general masonry work, prepare sample masonry panels where directed by Architect. Obtain Architect s acceptance of visual qualities before proceeding with the work. Refer to Section D 1.06 DEFINITIONS A. Low-Pressure Spray: 100 to 400 psi; 4 to 6 gpm. B. Medium-Pressure Spray: 400 to 800 psi; 4 to 6 gpm. C. High-Pressure Spray: 800 to 1200 psi; 4 to 6 gpm QUALITY ASSURANCE A. Restoration Specialist: Work must be performed by a qualified firm having not less than five (5) years successful experience in comparable masonry work. All work to be performed will meet the Secretary of the Interior s Standards for the Treatment of Historic Properties. In addition, the firm must have updated approvals in writing from the manufacturers of the various cleaning and restoration products to be used for this project for application of those products. On-site first time manufacturer certification for non-chemical cleaning processes will be allowed for firms not currently approved for these processes predicated on proper manufacturer training and certification with equipment and products. B. Photo and Graphic Documentation: After staging is in place for direct access to all areas of the building, the contractor shall complete a survey of existing conditions: 1. All areas in which any Masonry Rebuilding or Replacement is to occur must be documented photographically in a manner approved by the architect prior to commencing with the work. This documentation shall include clear, professional quality 4" x 6" color prints. All photographs must include a clearly shown measuring tape for scale and be neatly labeled on the back to identify the area, materials and building shown, the date of the photograph, and the photographer. Work may not proceed in any given area until BKA Associates, Inc

3 The Chocolate Factory/ the architect accepts the submitted photographs as meeting those requirements. Progress (50% complete) and 100% completion photographs of each work area with identical views must be submitted to document the work. 2. Unit Prices: All areas receiving general masonry repairs, repointing, or work related to Unit Pricing by the General Contractor in order to adjust as required the extent of work and conditions as indicated on the drawings. 3. Inspection and Survey: The Contractor shall document the results of the general inspection and survey on a set of the Drawings furnished by the Architect, indicating all additions, deletions and revisions, and shall submit them for review and approval by the Architect prior to commencing with the Work. The survey notations must be the same as those used in the Drawings, and the survey should reflect the intent of the repairs and repointing work as described on the Drawings and photos. The Contractor shall submit to the Architect, copies of the field survey drawings along with written confirmation of the quantities of work items controlled by Unit Prices. The scope of work to be implemented under this contract will subsequently be authorized by the Owner based on the approval of quantities of work to be completed on the basis of approved Unit Prices. C. Field Construction Mock-Ups: Prior to start of general masonry restoration, prepare the following sample cleaning and masonry restoration panels on building where directed by Architect. Obtain Architects and Historical Preservation Consultant s acceptance of visual qualities before proceeding with the work. Retain acceptable panels in undisturbed condition, suitably marked and documented during construction as a standard for judging completed work. D. Cleaning: Demonstrate materials and methods to be used for cleaning each type of masonry and stone surface and condition on sample panels of approximately 25 s.f. in area. 1. Test adjacent non-masonry materials for possible reaction with cleaning materials unless cleaners and methods are known to have a deleterious effect. 2. Allow waiting period of duration indicated, but not less than 7 calendar days, after completion of sample panels for negative reactions. E. Repointing: Prepare (2) separate sample areas of approximately 3' high by 3' wide (or as approved by architect) for each type of repointing required: one for demonstrating methods and quality of workmanship expected in removal of mortar from joints; and the other for demonstrating quality of materials and workmanship expected in repointing mortar joints. F. Carefully remove and salvage existing brick for possible re-use for this project. All excess brick shall be turned over to Owner. G.C. to coordinate with Architect on storage location. G. Source of Materials: Utilize salvaged face brick for new/repaired face brick applications to the fullest extent possible. For new face brick as required should existing salvaged face brick not be sufficient, obtain materials for masonry restoration to match existing from a single source for each type of material required (face brick, stone, cement, sand, etc.) to ensure match of quality, color, pattern, and texture to existing STORAGE AND HANDLING A. Deliver materials to site in manufacturer's original and unopened containers and packaging, bearing labels as to type and names of products and manufacturers. B. Protect masonry restoration materials during storage and construction from wetting by rain, snow or ground water, and from staining or intermixture with earth or other types of materials. BKA Associates, Inc

4 The Chocolate Factory/ C. Protect grout, mortar and other materials from deterioration by moisture and temperature. Store in a dry location or in waterproof containers. Keep containers tightly closed and away from open flames. Protect liquid components from freezing. D. Comply with manufacturer's recommendations for minimum and maximum temperature requirements for storage SPECIAL CONDITIONS A. Verify with Owner for the amount and availability of water (prior to submitting bids). Bidders will state in the proposal if water will be available from public sources. If not available, bidder must carry the cost of providing water for cleaning operations. B. The entire building will be fully operational throughout course of the project. C. Architect and Historic Preservation Consultant shall approve all materials and methods, in all aspects of restoration before restoration work shall commence PROJECT CONDITIONS A. Restoration contractor shall coordinate all City of Brockton requirements for protection of persons, property, traffic control, barricades, etc. Protect persons, vehicles, all non-masonry building surfaces (including but not limited to window glass and frames, flashing, painted sheet metal and doors). Protect related fixtures, all metals, fittings and equipment of the building and building site, surrounding buildings, all signage, flagpoles, light poles, lighting fixtures, and related materials from injury resulting from the Work. 1. Prevent both chemical and non-chemical cleaning solutions from coming into contact with pedestrians, motor vehicles, landscaping, buildings and other surfaces which could be injured or soiled by such contact. 2. Do not clean masonry during winds of sufficient force to spread cleaning solutions to unprotected surfaces. 3. Dispose of run-off from cleaning operations by legal means and in manner which prevents soil erosion, undermining of paving and foundations, damage to landscaping, and water penetration in building interiors. Proper precautions should be taken to neutralize acidic cleaner run-off and accumulation of abrasive particulate in and around storm drains. 4. Erect temporary protection covers over pedestrian walkways and at points of entrance and exit for persons and vehicles which must remain in operation during course of masonry restoration work. B. Damage caused by the handling, storing, mixing or application of materials, or the failure to provide adequate protection shall be repaired or replaced at no additional cost to the Owner. C. Clean masonry surfaces only when air temperatures are 40 F. (4 C.) and above and will remain so until masonry has dried out, but for not less than 7 days after completion of cleaning. D. Do not repoint mortar joints or repair masonry unless air temperatures are between 40 F. (4 C.) and 80 F. (27 C.) and will remain so for at least 48 hours after completion of work. Strictly comply with recommendations of the Brick Institute of America Technical Note No.1a, Cold Weather Masonry Construction, Construction and Protection Recommendations and the Portland Cement Association. Weather and temperature conditions shall also be within the limits established by the manufacturers of the materials and products used. BKA Associates, Inc

5 The Chocolate Factory/ E. Prevent grout or mortar used in repointing and repair work from staining the face of surrounding masonry and other surfaces. F. Protect sills, ledges and projections from mortar droppings. No spills or droppings shall be permitted to remain at the end of each workday. Clean exposed masonry with soft brushes and water only. G. All exterior rebuilding and patching when complete shall exactly match the color, texture, performance characteristics and character of existing sound masonry work elsewhere on the building SEQUENCING/SCHEDULING A. Perform masonry restoration work in the following sequence: 1. Obtain approval on all test patches from Architect and HPC (Historic Preservation Consultant) before commencing work. 2. Complete documentation of existing conditions for Owner 3. Rake out existing mortar from joints indicated to be repointed. 4. Repoint existing mortar joints of masonry indicated to be restored. 5. Consolidate stone/brick as indicated. 6. Clean existing masonry surfaces and new work. PART 2 - PRODUCTS 2.01 MATERIALS A. Brick: Re-use existing removed brick or provide new brick to match existing, ASTM C 216, Severe weathering grade, Type FBS to match existing. Special shapes as required by building configuration- 1. All new work is to match coursing, head and bed joints, sizes, texture, color and finish of existing brick. Verify match with Architect and Mass. Historic Commission L.P.C. prior to ordering brick and mock-ups. B. Mortar: To match existing based on test. Provide mortar analysis report. C. In this specification, the term mortar shall be understood to mean mortar composed of Portland Cement, hydrated lime, sand and water or such composition as determined by specific laboratory testing to ensure compatibility with existing mortars and masonry units to be retained. D. Mortar Materials: Provide a mortar mix of 1 part portland cement, 1 part lime, 6 parts sand. Match existing color, texture and appearance to the greatest extent possible. All restoration mortars shall conform the Secretary of the Interior s Standards for the Treatment of Historic Properties. BKA Associates, Inc

6 The Chocolate Factory/ Mortar and Grout: a. Mortar Mix: ASTM C270, Type S, for reinforced masonry, masonry below grade and masonry in contact with earth and ASTM C270, Type N, for above-grade load-bearing and non-loadbearing walls and parapet walls and for interior load-bearing and non-loadbearing partitions. b. Mortar shall match existing mortar in color, texture and setting formulation based on existing conditions and review and approval by Architect. c. Mortar Materials: Portland cement, ASTM C150, Type I or II. d. Mortar Materials: Ready mixed, ASTM C207, Type S. e. Grout Aggregate: ASTM C404. f. Hydrated Lime: ASTM C207, Type S. g. Color: ASTM C144. Final color to match existing and is subject to approval by Architect. h. No anti-freeze or accelerants shall be allowed in the mixture. E. Standards for materials: 1. Portland Cement: ASTM C 150, Type I. a. For stonework and other masonry indicated, provide nonstaining white cement complying staining requirement of ASTM C91 for not more than 0.3% water soluble alkali. 2. Hydrated Lime: ASTM C 207, Type S. 3. Aggregate for Mortar: ASTM C 144, unless otherwise indicated. 4. Colored Mortar Aggregate: Natural sand selected to produce mortar color indicated. a. For pointing mortar, provide sand with rounded edges. b. Match size, texture and gradation of existing mortar as closely as possible. 5. Water: Clean, free of oils, acids, alkalis, low in Iron and other metallic contents, and organic matter. 6. Aggregate for Grout: ASTM C 404. D. Cleaning Materials and Equipment: 1. Water: Preferred cleaning medium. Water for Cleaning should be clean, potable, free of oils, acids, alkalis, salts, and organic matter. 2. Brushes: Fiber bristle only. 3. Granite: Manufacturer's standard strength masonry restoration cleaner composed of chemicals combined with special wetting systems and inhibitors. Chemical-based cleaning solution will be bristle brush applied and as weak as possible to accomplish desired cleaning. Provide products for neutralizing run-off of acid based materials, type to be based on actual cleaners used. Products subject to compliance with requirements, provide the following: a. Sure-Klean Heavy Duty Restoration Cleaner ; ProSoCo, Inc. b. Hydroclean Brick, Granite and Sandstone Cleaner ; Hydrochemical Techniques, Hartford, CT. c. DR-60 Stone & Masonry Cleaner ; Dominion Restoration Inc. 4. Brick, Terra-Cotta, Brownstone: Non-chemical-based micro-abrasive, very low-pressure water (10 to 50 psi) delivered through a variety of differently sized nozzles producing a low angle rotating spray. Approved micro-abrasives will be sodium free, and proven effective cleaners of similar masonry materials to those involved in this project. Recommended micro-abrasives include glass powder, dolomite and stone powder. BKA Associates, Inc

7 The Chocolate Factory/ Non-ionic detergents or surfacants may be added to treat hydrophobic stains. Provide test area for approval prior to application. Proprietary cleaning solutions containing detergents, acidic or alkaline compounds may be introduced to address hard to clean areas. If this type of product is proposed, great care must be exercised in product selection and preparation of test panels to identify potentially detrimental effects on the masonry. The use of raw acids and/or alkalis for masonry cleaning is not permitted at any time. a. Sure-Klean Light Duty Restoration Cleaner ; ProSoCo, Inc. b. Hydroclean Brick, Granite and Sandstone Cleaner ; Hydrochemical Techniques, Hartford, CT. (cut 5 to 1 with water conduct test patches) c. DR-60 Stone & Masonry Cleaner ; Dominion Restoration Inc. 5. Ferrous Granite Staining: Use products as determined by stain removal mockups and subject to compliance with requirements, provide the following: a. "Rust Stain Remover"; ProSoCo, Inc. or approved equal. b. "T-515 Copper Stain Remover ; Hydrochemical Techniques, Hartford, CT. or approved equal. 6. Liquid Strippable Masking Agent: Manufacturer's standard liquid, film forming, strippable masking materials for protecting glass, metal and polished stone surfaces from damaging effect of acidic and alkaline masonry cleaners. 7. Spray Equipment: Provide equipment for controlled spray application of water, and nonchemical micro-abrasive, at rates indicated for pressure, measured at spray tips, and for volume. a. For spray application of non-chemical cleaning abrasive, provide a variety of differently sized nozzles producing a rotating low angle spray. b. For spray application of water provide fan-shaped spray tip which disperses water at an angle of not less than 15. Provide an adjustable Low or Medium Pressure rinse pump at 3-4 gallons per minute. Acceptable pressures for each substrate may be lower, and will be determined based on mockups. Hold spray nozzle not less than 9 inches from the wall. E. Mortar Mixes: 1. General: All mortar mixes shall comply with the requirements set forth in ASTM C 270, Standard Specification for MORTAR FOR UNIT MASONRY and shall consist of mixes for respective locations and materials designated in this section. Components shall be modified as below. Ready mixed mortars for restoration work will only be permitted when said mortars are specifically and specially prepared for use on this Project. Mortars used must contain only approved brands and types of lime, cement, sand and colorant and no other materials, and conform to the specified proportion specification for each use and be based on the Owner provided testing data. 2. Measurement and Mixing: Measure cementitious and aggregate material in a dry condition by volume or equivalent weight. Do not measure quantities by shovel, use known measure. Mix materials in a clean mechanical batch mixer. i. Mixing Pointing Mortar: Thoroughly mix cementitious and aggregate materials together before adding any water. Then mix again adding only enough water to produce a damp, but workable mix which will retain its form when pressed into a ball. Maintain mortar in this dampened condition for 1 to 2 hours. Add remaining water in small portions until mortar of desired consistency is reached. Use mortar within 30 minutes of final mixing; do not retemper or use partially hardened material and adhere to specified installation temperature restrictions. BKA Associates, Inc

8 The Chocolate Factory/ Colored Mortar: Produce mortar of color required by use of selected ingredients. Do not adjust proportions without Architect's approval. a. Organic based colored aggregate shall be used to produce the mortar color indicated. 4. Do not use admixtures of any kind in mortar, unless otherwise indicated and approved. 5. Pointing Mortar for Brick: Provide a pointing mix of 1 part lime, 3 parts sand. 6. Pointing Mortar for Stone: Provide a mortar mix of 1 part portland cement, 1 part lime, 6 parts sand. F. Chemical Cleaning Solutions: 1. General: Unless otherwise indicated, dilute chemical cleaning materials with water to provide solutions of gentlest possible concentration indicated to perform necessary work as recommended by chemical cleaner approved in mockups. 2. Liquid water repellant and sealers will not be allowed. PART 3 - EXECUTION 3.01 PREPARATION A. General: Comply with recommendations of manufacturers of chemical and non-chemical cleaners for protecting building surfaces against damage from exposure to their products. B. Protect glass and unpainted metal trim from contact with acidic chemical cleaners and abrasives by covering them with liquid strippable masking agent or polyurethane film and waterproof masking tape. Apply masking agent to comply with manufacturer's recommendations. Do not apply liquid masking agent to painted or porous surfaces. Protection can be eliminated subject to Architect's approval, if testing demonstrates no detrimental effect from exposure to cleaning solutions CLEANING EXISTING MASONRY A. Cleaning -General: 1. Clean all designated surfaces using specified and approved methods to remove dirt. Dirt is defined as the general accumulation of atmospheric pollutants as well as specific materials including but not limited to waterproof coatings, bird excrement, tar, paint, metallic and miscellaneous stains, and mineral stains. 2. For each surface and soiling condition, use only the least aggressive methods and materials necessary to produce acceptable cleaning and uniform appearance. Cleaning shall be accomplished in such a manner so as to remove dirt and accretions and to present a uniform appearance similar to that demonstrated on the approved mockups. 3. Proceed with cleaning in an orderly manner and as recommended by the manufacturer; work from one end of each elevation to the other. 4. Perform each cleaning method indicated in a manner which results in uniform coverage of all surfaces, including corners, moldings, interstices and which produces an even effect without streaking, spotting or damage to masonry surfaces. 5. Rinse off chemical residue and soil by working upwards from bottom to top of each treated area at each stage or scaffold setting. BKA Associates, Inc

9 The Chocolate Factory/ B. Cleaning Water: 1. Methods include low pressure wash over an extended period, low to medium pressure wash. 2. Work only when the ambient temperature will 40 F or above for 72 hours after completion. C. Cleaning - Chemical: 1. Apply chemical cleaners only to granite surfaces complying with chemical manufacturer's recommendations for brush application methods. 2. Do not allow chemicals to remain on surfaces for periods longer than that indicated or recommended by the manufacturer or as shown on mockups. 3. Reapplication of Chemical Cleaners: Do not apply chemical cleaners to same masonry surfaces more than twice. If additional cleaning is required, notify Architect before proceeding. 4. For spot cleaning of metallic stains, deep carbon stains, and paint use non-abrasive means. Spot clean as directed by the Owner s representative to remove paint, sealer, tar, mortar, organic, carbon or metallic stains. D. Cleaning Non-Chemical: 1. Water and sodium-free micro-abrasive cleaning is to be used for the removal of soiling on all Brick, Terra Cotta, and Brownstone surfaces. 2. Attention to the specific details of the conveying system should noted during mockup approval. These include micro-abrasive types and range of particle sizes, nozzle type and size, working pressure, working distance to masonry being cleaned, effectiveness of protection measures, and reclamation, disposal and clean up of spent cleaning media. 3. Water based non-chemical cleaning solution is to be used for the removal of dirt and soiling on the slate roof surface STONE CONSOLIDATION A. Stone Consolidation: JAHN M70 Stone Patching Mortar or approved equal; vapor-permeable single-component mortar for restoration of natural stone surfaces; mineral-based, containing no synthetic polymer bonding agents or additives. 1. Laboratory-engineered formulation for compatibility with existing terra-cotta and brownstone substrate. 2. Color: Custom color matching Architect-approved sample REPOINTING EXISTING MASONRY A. Prior to start of repointing work, review with Architect extent of work to be performed. B. Joint Raking: 1. Rake out mortar from joints to depths equal to 2½ times their widths but not less than ½" BKA Associates, Inc

10 nor less than that required to expose sound, unweathered mortar. The Chocolate Factory/ Remove mortar from masonry surfaces within rake-out joints to provide reveals with square backs and to expose masonry for contact with pointing mortar. Brush, vacuum or flush joints to remove dirt and loose debris. 3. Do not spall or nick edges of masonry units or widen joints. Replace any masonry units which become damaged. a. Cut out old mortar by hand with chisel and mallet, unless otherwise indicated and approved. b. Mechanical removal of mortar will not be permitted on vertical joints at brick. 4. Joint Repointing: a. Rinse masonry joint surfaces with water to remove any dust and mortar particles. Time application of rinsing so that at time of pointing excess water has evaporated or run off, joint surfaces are damp but free of standing water. b. Apply first layer of pointing mortar to areas where existing mortar was removed to depths greater than surrounding areas. Apply in layers not greater than 3/8" until a uniform depth is formed. Compact each layer thoroughly and allow to become thumbprint-hard before applying next layer. c. After joints have been partially filled to a uniform depth, place remaining pointing mortar in 3 layers with each of first and second layers filling approximately 2/5 of joint depth and third layer the remaining 1/5. Fully compact each layer and allow to become thumbprint-hard before applying next layer. Where existing bricks have rounded edges, recess final layer slightly from face. Take care not to spread mortar over edges onto exposed masonry surfaces, or to featheredge mortar. d. When mortar is thumbprint-hard. tool joints to match original appearance of joints, unless otherwise indicated. Remove excess mortar from edge of joint by brushing. e. Width of joints is not to exceed ½". Typical brick joints are ¼". Finish joint to match those on existing building. f. Cure mortar by maintaining in a damp condition for not less than 72 hours FINAL CLEANING A. After mortar has fully hardened, thoroughly clean exposed masonry surfaces of excess mortar and foreign matter using stiff nylon or bristle brushes and clean water, spray applied at low pressure. Mortar daubs will not be permitted. B. Use of metal scrapers or brushes will not be permitted. C. Use of acid or alkali cleaning agents will not be permitted. D. Liquid water repellant will not be permitted. END OF SECTION BKA Associates, Inc

11 SECTION UNIT MASONRY The General Conditions of the Contract and sections that comprise Division1, General Requirements, are hereby made a part of this section as if fully repeated herein. Where conflicts may arise between the respective sections, the General Conditions of the Contract shall prevail unless the context clearly requires otherwise. PART 1 GENERAL 1.01 SECTION INCLUDES A. Concrete masonry units for single wythe and cavity wall construction. B. Face brick units for cavity wall construction. C. Mortar for masonry units. D. Reinforcement, anchorage and accessories. E. Masonry flashings. F. Masonry sealer coating PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION A. Section Metal Fabrications: Placement of loose steel lintels RELATED SECTIONS A. Section Allowances: Cash Allowances. B. Section Unit Prices B. Section Maintenance of Masonry C. Section Waterproofing and Dampproofing: Application of dampproofing at cavity wall construction. D. Section Joint Sealers: Rod and sealant at control joints REFERENCES A. ANSI/ASTM A82 - Cold-Drawn Steel Wire for Concrete Reinforcement. B. ANSI/ASTM C652 - Hollow Brick (Hollow Masonry Units Made From Clay or Shale). C. ASTM A123 - Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products. D. ASTM A615 - Deformed and Plain Billet Steel Bars for Concrete Reinforcement. E. ASTM B370 - Copper Sheet and Strip for Building Construction. BKA Architects, Inc

12 F. ASTM C90 - Hollow Load Bearing Concrete Masonry Units. G. ASTM C145 - Solid Load Bearing Concrete Masonry Units. H. ASTM C144 - Aggregate for Masonry Mortar. I. ASTM C150 - Portland Cement. J. ASTM C207 - Hydrated Lime for Masonry Purposes. K. ASTM C270 - Mortar for Unit Masonry. L. ASTM C387 - Packaged, Dry, Combined Materials, for Mortar and Concrete. M. ASTM C404 - Aggregates for Masonry Grout. N. ASTM C476 - Grout for Masonry. O. ASTM C780 Pre-construction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry. P. ASTM C Method of Sampling and Testing Grout. Q. ANSI/ASTM C73 - Calcium Silicate Face Brick (Sand-Lime Brick). R. ANSI/ASTM C126 - Ceramic Glazed Structural Clay Facing Tile, Facing Brick, and Solid Masonry Units. S. ANSI/ASTM C216 - Facing Brick (Solid Masonry Units Made From Clay or Shale). T. IMIAC - International Masonry Industry All-Weather Council: Recommended Practices and Guide Specification for Cold Weather Masonry Construction. U. UL - Underwriters' Laboratories SUBMITTALS A. Submit product data under provisions of Section B. Submit samples under provisions of Section C. Submit four samples of face brick units to illustrate color, texture and extremes of color range. D. Include mortar design mix; indicate Proportion or Property method used, required environmental conditions and admixture limitations. E. Samples: Submit two ribbons of mortar color, illustrating color and color range. F. Submit manufacturer's certificate under provisions of Section that products meet or exceed specified requirements QUALIFICATIONS A. Installer: Company specializing in performing the work of this Section with minimum five years documented experience. BKA Architects, Inc

13 1.07 REGULATORY REQUIREMENTS A. Conform to requirements for masonry construction MOCK-UP A. Provide mock-up of face brick masonry under provisions of Section B. Erect face brick to 4 x 4 feet panel size, include specified mortar and accessories. C. When accepted, mock-up will demonstrate minimum standard for the Work. Mock-up may not remain as part of the Work PRE-INSTALLATION CONFERENCE A. Convene one week prior to commencing work of this Section DELIVERY, STORAGE AND HANDLING A. Deliver products to site under provisions of Section B. Store and protect products under provisions of Section C. Accept face brick units on site. Inspect for damage ENVIRONMENTAL REQUIREMENTS A. Strictly comply with recommendations of the International Masonry Industry All-Weather Council Recommended Practices and Guide Specifications for Cold (Hot) Weather Masonry Construction; the Brick Institute of America Technical Notes on Brick Construction, Parts 1, 2 and 3; The Portland Cement Assoc SEQUENCE AND SCHEDULING A. Coordinate work under provisions of Section B. Coordinate the masonry work with brick veneer and installation of window anchors. PART 2 PRODUCTS 2.01 MANUFACTURERS CONCRETE MASONRY UNITS A. Park Avenue Cement Block Company. B. Substitutions: Under provisions of Section CONCRETE MASONRY UNITS A. Hollow Load Bearing Block Units: ASTM C90, Grade N, Type I - Moisture Controlled; normal weight. B. Veneer Block Units: ASTM C145, Grade N-1; Architectural split face, natural color. C. Masonry Units: Nominal modular sizes of 4 x 16 x 8 inches, 6 x 16 x 8 inches, and 8 x 16 x 8 inches. Provide special units for 90 degree corners, bond beams, lintels and control joints. BKA Architects, Inc

14 2.03 MANUFACTURERS FACE BRICK UNITS A. Glen-Gery Brick. B. Spaulding Brick Company of Rhode Island. C. Belden Brick Company. D. Substitutions: Under provisions of Section FACE BRICK UNITS A. See Section Calcium Silicate Building Stone MORTAR MATERIALS CONCRETE MASONRY UNITS A. Portland Cement: ASTM C150, Type I. B. Aggregates: ASTM C144, standard masonry type; clean, dry, protected against dampness, freezing and foreign matter. C. Hydrated Lime: ASTM C207, Type S. D. Water: Clean and free from injurious amounts of oil, alkali, organic matter or other deleterious material. E. Use no admixtures unless written approval is obtained from Architect. F. Color: As selected by Architect MORTAR MIXES CONCRETE MASONRY UNITS A. Mortar for Load Bearing Walls and Partitions: ASTM C270, Type S, using the Property Method, 1800 psi compressive strength. B. Mortar for Reinforced Masonry; ASTM C270, Type S using the Property Method, 1800 psi compressive strength GROUT MIXES A. Grout: ASTM C476; consistency which will completely fill all spaces intended to receive grout. B. Bond Beams and Lintels: 3,000 psi strength at 28 days; 7-8 inches slump; premixed type in accordance with ASTM C94 or mixed in accordance with ASTM C476, fine and course grout. C. Engineered Masonry: 3,000 psi strength at 28 days; 7-8 inches slump; premixed type in accordance with ASTM C94 or mixed in accordance with ASTM C476, fine and course grout MORTAR MATERIALS FACE BRICK UNITS A. Portland Cement: ASTM C150, Type I, white color. B. Mortar Aggregate: ASTM C144, Standard Masonry Type. C. Hydrated Lime: ASTM C207, Type N. BKA Architects, Inc

15 D. Water: Clean and potable MORTAR MIXES FACE BRICK UNITS A. Mortar for Reinforced Masonry: ASTM C270, Type N, using the Property Method to achieve 750 psi strength MORTAR MIXING FACE BRICK UNITS A. Thoroughly mix mortar ingredients in quantities needed for immediate use in accordance with ASTM C270. B. Add mortar color, if required, in accordance with manufacturer's instructions. Provide uniformity of mix and coloration. C. Do not use anti-freeze compounds to lower the freezing point of mortar. D. If water is lost by evaporation, retemper only within two hours of mixing. E. Use mortar within two hours after mixing at temperatures of 80 degrees F, or two-and-one-half hours at temperatures under 50 degrees F MORTAR COLOR FACE BRICK UNITS A. Mortar Color: Mineral oxide pigment; color as selected by Architect ADMIXTURES A. The use of air entraining, antifreeze compounds or calcium chloride admixtures or other substances is not allowed REINFORCEMENT AND ANCHORAGE A. CMU: Truss type, welded wire units fabricated from 9 gage ASTM A82 cold-drawn galvanized steel wire with deformed side wire and smooth cross wire; Space reinforcing at 16 on center vertically maximum. Provide one side rod for each concrete masonry shell face. B. CMU AND BRICK VENEER: Composite wall ties with two legged, galvanized steel adjustable eye and pintle type units with minimum 3/16 wire diameter; Spaced anchors at 16 on center horizontally and at 16 on center vertically. C. Joint Stabilizing Anchors: To connect new masonry walls to existing masonry walls at vertical control joints; Cold-drawn steel; hot dip galvanized; spaced at 16 on center vertically; D/A 2200, manufactured by Dur- O-Wall, Inc. D. Reinforcing Steel: ASTM A615, 60 ksi 276, 414, 517 MpA yield grade, deformed billet bars, unprotected finish.. E. Substitutions: Under provisions of Section MASONRY FLASHINGS A. Membrane Flashings: Grace Construction Products, Inc. Perm-A-Barrier self-sealing, self-healing, fully adhered wall flashing; 32 Mil thick, pliable and highly adhesive rubberized asphalt compound bonded completely and integrally to 8 mil thick, high density 4 ply cross laminated fill; 40 mil overall thickness. BKA Architects, Inc

16 B. Substitutions: Under provisions of Section ACCESSORIES A. Preformed Control Joints: Neoprene material conforming to ASTM D1056, Class RE41; provide with heat fused joints; thickness as required to suit masonry condition; manufactured by "AA Wire Products Company". B. Weep Holes: Preformed plastic tubes. C. CLEANING SOLUTIONS: ProSoCo, Inc. SureKlean 600" detergent masonry cleaner; Non-acidic, not harmful to masonry work or adjacent materials. D. Substitutions: Under provisions of Section MASONRY SEALER COATING A. Sealer Coating: ProSoCo, Inc. Sure Klean products. 1. Sure Klean Weather Seal : For use on brick veneer surfaces. 2. Sure Klean Blok-Guard ; For use on CMU veneer surfaces. PART 3 EXECUTION 3.01 EXAMINATION A. Verify that field conditions are acceptable and are ready to receive work. B. Verify items provided by other Sections of work are properly sized and located. C. Verify that built-in items are in proper location, and ready for roughing into masonry work. D. Beginning of installation means installer accepts existing conditions PREPARATION A. Direct and coordinate placement of metal anchors supplied to other Sections. B. Provide temporary bracing during installation of masonry work. Maintain in place until building structure provides permanent bracing COURSING A. Establish lines, levels and coursing indicated; protect from displacement. B. Maintain masonry courses to uniform dimension. Form vertical and horizontal joints of uniform thickness. C. Lay concrete masonry units in running bond. Course one unit and one mortar joint to equal 8 inches. Form concave mortar joints. D. Lay brick units in running bond. Course three brick units and three mortar joints equal to 8 inches. Form concave mortar joints. BKA Architects, Inc

17 3.04 PLACING AND BONDING A. Lay solid masonry units in full bed of mortar, with full head, bed and collar joints, uniformly jointed with other work. B. Lay hollow masonry units with face shell bedding on head and bed joints. C. Buttering courses of joints or excessive furrowing of mortar joints are not permitted. D. Remove excess mortar as Work progresses. E. Interlock intersections and external corners. F. Prior to laying, wet brick having an I.R.A. greater than 25 GR/Min/30In. G. Do not shift or tap masonry units after mortar has achieved initial set. Where adjustment must be made, remove mortar and replace. H. Perform jobsite cutting of masonry units with proper tools to provide straight, clean, unchipped edges. Prevent broken masonry unit corners or edges. I. Cut mortar joints flush where insulation bitumen dampproofing is applied WEEPS A. Install weep holes in brick veneer at 32 inches on center horizontally above through-wall flashing, above shelf angles and at bottom of walls CAVITY WALL A. Do not permit mortar to drop or accumulate into cavity air space or to plug weep holes REINFORCEMENT AND ANCHORAGES SINGLE WYTHE MASONRY A. Install horizontal joint reinforcement 16 inches oc. B. Place masonry joint reinforcement in first horizontal joints above and below openings. Extend minimum 16 inches each side of opening. C. Place joint reinforcement continuous in first joint below top of walls. D. Lap joint reinforcement ends minimum 6 inches. Extend minimum 16 inches each side of openings. E. Reinforce joint corners and intersections with prefabricated corner pieces 16 inches oc REINFORCEMENT AND ANCHORAGES CAVITY WALL VENEER MASONRY A. Install veneer anchors at 16 on center horizontally and 16 on center vertically; at one course above all openings, extending three feet beyond each side of opening; and within 8 inches of corners and abutting masonry veneer MASONRY THROUGH-WALL FLASHINGS A. Install through wall flashing on top of masonry base course or at locations shown on the Drawings. Terminate flashing at top by extending up and behind sheathing as shown on the Drawings. Overlap adjacent pieces by BKA Architects, Inc

18 2 and roll all overlaps with a steel hand roller or blunt object.. B. Trim bottom edge ½ back from exposed face of building. Apply a bead or trowel coat of bituthene mastic along termination s seams, cuts, penetrations and punctures. C. Fill cavity to depth of 8 with 3/8 pea stone LINTELS A. Install loose steel lintels over window openings and door openings as specified on the drawings. B. Install reinforced unit masonry lintels over openings as specified on the drawings. C. Openings up to 48 Inches Wide: Place two, No. 5 reinforcing bars 1 inch from bottom web, unless noted otherwise. D. Openings Over 48 Inches. Reinforce openings as detailed. F. Use single piece reinforcing bars only. G. Support and secure reinforcing bars from displacement. Maintain position within 1/2 inch of dimensioned position. H. Place and consolidate grout fill without displacing reinforcing. I. Allow masonry lintels to attain specified strength before removing temporary supports. J. Maintain minimum 8 inch bearing on each side of opening BITUMINOUS DAMPPROOFING A. Apply Bituminous dampproofing to face of concrete masonry backer units at cavity wall construction GROUTED COMPONENTS A. Reinforce bond beams as shown on drawings, placed 1 inch from bottom of web. B. Lap splices minimum 24 bar diameters. C. Support and secure reinforcing bars from displacement. Maintain position within 1/2 inch of dimensioned position. D. Place and consolidate grout fill without displacing reinforcing. E. At bearing locations, fill masonry cores with grout for a minimum 12 inches either side of opening ENGINEERED MASONRY A. Lay masonry units with core cells vertically aligned and cavities between wythes clear of mortar and unobstructed. B. Place mortar in masonry unit bed joints back 1/4 inch from edge of unit grout spaces, bevel back and upward. Permit mortar to cure 7 days before placing grout. BKA Architects, Inc

19 C. Reinforce masonry unit cores with reinforcement bars and grout as indicated. D. Retain vertical reinforcement in position at top and bottom of cells and at intervals not exceeding 192 bar diameters. Splice reinforcement in accordance with Section E. Wet masonry unit surfaces in contact with grout just prior to grout placement. F. Grout spaces less than 2 inches in width with fine grout using low lift grouting techniques. Grout spaces 2 inches or greater in width with course grout using low lift grouting techniques. G. When grouting is stopped for more than one hour, terminate grout 1 1/2 inch below top of upper masonry unit to form a positive key for subsequent grout placement. H. Low Lift Grouting: Place first lift of grout to a height of 16 inches and rod for grout consolidation. Place subsequent lifts in 8 inch increments and rod for grout consolidation CONTROL JOINTS A. Do not continue horizontal joint reinforcement through control joints. B. Install preformed control joint device in continuous lengths. Seal butt and corner joints in accordance with manufacturer's instructions. C. Size control joint in accordance with Section for sealant performance. D. Provide control joints at 20 feet on center, maximum, unless noted otherwise BUILT-IN WORK A. As work progresses, build in metal door frames, window frames, wood nailing strips, anchor bolts, plates, lintels and other items furnished by other Sections. B. Build in items plumb and level. C. Bed anchors of metal door frames in adjacent mortar joints. Fill frame voids solid with grout. Fill adjacent masonry cores with grout minimum 12 inches from framed openings. D. Do not build in organic materials subject to deterioration TOLERANCES A. Maximum Variation From Unit to Adjacent Unit: 1/32 inch. B. Maximum Variation From Plane of Wall: 1/4 inch in 10 feet and 1/2 inch in 20 feet or more. C. Maximum Variation From Plumb: 1/4 inch per story non-cumulative; 1/2 inch in two stories or more. D. Maximum Variation From Level Coursing: 1/8 inch in 3 feet and 1/4 inch in 10 feet; 1/2 inch in 30 feet. E. Maximum Variation of Joint Thickness: 1/8 inch in 3 feet. F. Maximum Variation From Cross Sectional Thickness of Walls: 1/4 inch CUTTING AND FITTING BKA Architects, Inc

20 A. Cut and fit for concealed items as required. Coordinate with other Sections of Work to provide correct size, shape and location. B. Obtain Architect approval prior to cutting or fitting masonry work not indicated or where appearance or strength of masonry work may be impaired CLEANING A. Clean work under provisions of Section B. Remove excess mortar and mortar smears. C. Replace defective mortar. Match adjacent work. D. Clean soiled surfaces with cleaning solution. E. Use non-metallic tools in cleaning operations. F. Do not use strong acids for cleaning PROTECTION OF FINISHED WORK A. Protect finished installation under provisions of Section B. Without damaging completed work, provide protective boards at exposed external corners which may be damaged by construction activities SCHEDULES A. Exterior wall systems; Locations of wall types shown on drawings. END OF SECTION BKA Architects, Inc

21 SECTION CONCRETE MASONRY UNIT PART 1 - GENERAL 1.01 RELATED DOCUMENTS A. Division 01 Sections, Drawings, General Conditions, Supplementary Conditions, and Special Conditions apply to this section SUMMARY A. Section Includes: 1. Concrete masonry units (CMUs). 2. Mortar and grout. 3. Reinforcing steel. 4. Masonry joint reinforcement. 5. Ties and anchors. 6. Embedded flashing. 7. Control joint materials. B. Products installed, but not furnished, under this Section: 1. Section Metal Fabrication for steel lintels and shelf angles for unit masonry. 2. Section Sheet Metal Flashing and Trim. C. Related Requirements: 1. Section Masonry Mortaring. 2. Section Masonry Grouting. 3. Section Masonry Anchorage and Reinforcing. 4. Section Masonry Accessories. 5. Section Concrete Unit Veneer Masonry. 6. Section Prefaced Concrete Unit Masonry. 7. Section Glass Unit Masonry. 8. Section Water Repellents for application to unit masonry assemblies. 9. Section Sheet Metal Flashing and Trim for exposed sheet metal flashing. 10. Section Penetration Firestopping for firestopping at openings in masonry walls. 11. Section Fire-Resistive Joint Sealants for fire-resistive joint systems at heads of masonry walls. 12. Section Joint Sealants for sealing control and expansion joints in unit masonry. 13. Section Interlocking Precast Unit Paving REFERENCES A. TMS 602/ACI 530.1/ASCE Specification for Masonry Structures. BKA Architects,

22 B. ASTM International (latest versions): 1. ASTM A36/A36M Standard Specification for Carbon Structural Steel. 2. ASTM A82/A82M Standard Specification for Steel Wire, Plain, for Concrete Reinforcement. 3. ASTM A153/A153M Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware. 4. ASTM A185/A185M Standard Specification for Steel Welded Wire Reinforcement, Plain, for Concrete. 5. ASTM A307 Specification for Carbon Steel Bolts and Studs, 60,000 psi Tensile Strength. 6. ASTM A615/A615M Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement. 7. ASTM A641/A641M Standard Specification for Zinc-Coated (Galvanized) Carbon Steel Wire. 8. ASTM A653/A653M Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc- Iron Alloy-Coated (Galvanealed) by the Hot-Dip Process. 9. ASTM A884/A884M Standard Specification for Epoxy-Coated Steel Wire and Welded Wire Fabric for Reinforcement. 10. ASTM A899 Standard Specification for Steel Wire Epoxy-Coated. 11. ASTM A951/A951M Standard Specification for Masonry Joint Reinforcement. 12. ASTM A1008/A1008M Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, Solution Hardened, and Bake Hardenable. 13. ASTM C90 Standard Specification for Loadbearing Concrete Masonry Units. 14. ASTM C140/C140M Standard Test Method for Sampling and Testing Concrete Masonry Units. 15. ASTM C150/C150M Standard Specification for Portland Cement. 16. ASTM C270 Standard Specification for Mortar for Unit Masonry. 17. ASTM C476 Standard Specification for Grout for Unit Masonry. 18. ASTM C618 Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for use in Concrete. 19. ASTM C989/C989M Standard Specification for Slag Cement for Use in Concrete and Mortars. 20. ASTM C1019 Standard Test Method for Sampling and Testing Grout. 21. ASTM C1314 Standard Test Method for Compressive Strength of Masonry Prisms. 22. ASTM C1586 Standard Guide for Quality Assurance of Mortars. 23. ASTM C1611/C1611M Standard Test Method for Slump Flow of Self-Consolidating Concrete. 24. ASTM C1714/C1714M Standard Specification for Preblended Dry Mortar Mix for Unit Masonry. 25. ASTM D2000 Classification System for Rubber Products in Automotive Applications. 26. ASTM D2287 Standard Specification for Nonrigid Vinyl Chloride Polymer and Copolymer Molding and Extrusion Compounds SYSTEM DESCRIPTION A. Provide materials to achieve the net compressive strength of concrete unit masonry equal to or greater than 1500 psi f' m. B. Provide materials to achieve the net compressive strength of concrete unit masonry equal to or greater than the f' m as indicated [insert reference location] SUBMITTALS A. Obtain written acceptance of submittals prior to use of the following: BKA Architects,