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HomeMy WebLinkAbout04 20 00.docMATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 SECTION 04 20 00 - UNIT MASONRY PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY A. This Section includes unit masonry assemblies consisting of the following: 1. Concrete masonry units (CMUs). 2. Mortar and grout. 3. Reinforcing steel. 4. Masonry joint reinforcement. 5. Ties and anchors. 6. Embedded flashing. 7. Miscellaneous masonry accessories. 8. Masonry-cell insulation. 9. Cavity-wall insulation. B. Related Sections include the following: 1. Division 07 Section "Sheet Metal Flashing and Trim" for exposed sheet metal flashing. 1. Division 07 Section "Penetration Firestopping" for firestopping at openings in masonry walls. 2. Division 07 Section "Fire-Resistive Joint Systems" for fire-resistive joint systems at heads of masonry walls. 3. Division 07 Section "Joint Sealants" for sealing control and expansion joints in unit masonry. C. Products installed, but not furnished, under this Section include the following: 1. Steel lintels and shelf angles for unit masonry, furnished under Division 05 Section "Metal Fabrications." 2. Manufactured reglets in masonry joints for metal flashing, furnished under Division 07 Section "Sheet Metal Flashing and Trim." 1.3 DEFINITIONS A. Reinforced Masonry: Masonry containing reinforcing steel in grouted cells. 1.4 PERFORMANCE REQUIREMENTS A. Provide unit masonry that develops indicated net-area compressive strengths (f'm) at 28 days. MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 B. Determine net-area compressive strength (f'm) of masonry from average net-area compressive strengths of masonry units and mortar types (unit-strength method) according to Tables 1 and 2 in ACI 530.1/ASCE 6/TMS 602. 1.5 SUBMITTALS A. Product Data: For each type of product indicated. B. Shop Drawings: For the following: 1. Masonry Units: Show sizes, profiles, coursing, and locations of special shapes. 2. Reinforcing Steel: Detail bending and placement of unit masonry reinforcing bars. Comply with ACI 315, "Details and Detailing of Concrete Reinforcement." Show elevations of reinforced walls. 3. Fabricated Flashing: Detail corner units, end-dam units, and other special applications. C. Samples for Initial Selection: For the following: 1. Colored mortar. D. Samples for Verification: For each type and color of the following: 1. Exposed concrete masonry units. 2. Pigmented and colored-aggregate mortar. Make Samples using same sand and mortar ingredients to be used on Project. Label Samples to indicate types and amounts of pigments used. 3. Accessories embedded in masonry. E. Qualification Data: For testing agency. F. Material Certificates: Include statements of material properties indicating compliance with requirements including compliance with standards and type designations within standards. Provide for each type and size of the following: 1. Masonry units. a. Include material test reports substantiating compliance with requirements. b. For masonry units used in structural masonry, include data and calculations establishing average net-area compressive strength of units. 2. Cementitious materials. Include brand, type, and name of manufacturer. 3. Pre-blended, dry mortar mixes. Include description of type and proportions of ingredients. 4. Grout mixes. Include description of type and proportions of ingredients. 5. Reinforcing bars. 6. Joint reinforcement. 7. Anchors, ties, and metal accessories. G. Mix Designs: For each type of mortar and grout. Include description of type and proportions of ingredients. 1. Include test reports, per ASTM C 780, for mortar mixes required to comply with property specification. 2. Include test reports, per ASTM C 1019, for grout mixes required to comply with compressive strength requirement. H. Statement of Compressive Strength of Masonry: For each combination of masonry unit type and mortar type, provide statement of average net-area compressive strength of masonry units, MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 mortar type, and resulting net-area compressive strength of masonry determined according to Tables 1 and 2 in ACI 530.1/ASCE 6/TMS 602. I. Cold-Weather Procedures: Detailed description of methods, materials, and equipment to be used to comply with cold-weather requirements. 1.6 QUALITY ASSURANCE A. Installer Qualifications: A firm or individual experienced in installing unit masonry systems similar in material, design, and extent to that indicated for this Project, whose work has a record of successful in-service performance. 1. Refer also to Specification Section 01 40 00 “Quality Requirements,” 1.3.H and I. B. Comply with Structural Engineering Notes on Drawings, and the following Specifications. In the event of contradictory information in these specifications, the Structural Engineering Notes on the Drawings shall prevail. C. Testing Agency Qualifications: An independent agency qualified according to ASTM C 1093 for testing indicated, as documented according to ASTM E 548. D. Source Limitations for Masonry Units: Obtain exposed masonry units of a uniform texture and color, or a uniform blend within the ranges accepted for these characteristics, through one source from a single manufacturer for each product required. E. Source Limitations for Mortar Materials: Obtain mortar ingredients of a uniform quality, including color for exposed masonry, from a single manufacturer for each cementitious component and from one source or producer for each aggregate. F. Preconstruction Testing Service: Owner will engage a qualified independent testing agency to perform preconstruction testing indicated below. Payment for these services will be made by Owner. Retesting of materials that fail to meet specified requirements shall be done at Contractor's expense. 1. Prism Test: For each type of construction required, per ASTM C 1314. G. Fire-Resistance Ratings: Where indicated, provide materials and construction identical to those of assemblies with fire-resistance ratings determined per ASTM E 119 by a testing and inspecting agency, by equivalent concrete masonry thickness, or by other means, as acceptable to authorities having jurisdiction. H. Pre-installation Conference: Conduct conference at Project site to comply with requirements in Division 01 Section "Project Management and Coordination." 1.7 DELIVERY, STORAGE, AND HANDLING A. Store masonry units on elevated platforms in a dry location. If units are not stored in an enclosed location, cover tops and sides of stacks with waterproof sheeting, securely tied. If units become wet, do not install until they are dry. B. Store cementitious materials on elevated platforms, under cover, and in a dry location. Do not use cementitious materials that have become damp. MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 C. Store aggregates where grading and other required characteristics can be maintained and contamination avoided. D. Deliver pre-blended, dry mortar mix in moisture-resistant containers designed for lifting and emptying into dispensing silo. Store pre-blended, dry mortar mix in delivery containers on elevated platforms, under cover, and in a dry location or in a metal dispensing silo with weatherproof cover. E. Store masonry accessories, including metal items, to prevent corrosion and accumulation of dirt and oil. 1.8 PROJECT CONDITIONS A. Protection of Masonry: During construction, cover tops of walls, projections, and sills with waterproof sheeting at end of each day's work. Cover partially completed masonry when construction is not in progress. 1. Extend cover a minimum of 24 inches down both sides and hold cover securely in place. 2. Where 1 wythe of multi-wythe masonry walls is completed in advance of other wythes, secure cover a minimum of 24 inches down face next to un-constructed wythe and hold cover in place. B. Do not apply uniform floor or roof loads for at least 12 hours and concentrated loads for at least 3 days after building masonry walls or columns. C. Stain Prevention: Prevent grout, mortar, and soil from staining the face of masonry to be left exposed or painted. Immediately remove grout, mortar, and soil that come in contact with such masonry. 1. Protect base of walls from rain-splashed mud and from mortar splatter by spreading coverings on ground and over wall surface. 2. Protect sills, ledges, and projections from mortar droppings. 3. Protect surfaces of window and door frames, as well as similar products with painted and integral finishes, from mortar droppings. 4. Turn scaffold boards near the wall on edge at the end of each day to prevent rain from splashing mortar and dirt onto completed masonry. D. Cold-Weather Requirements: Do not use frozen materials or materials mixed or coated with ice or frost. Do not build on frozen substrates. Remove and replace unit masonry damaged by frost or by freezing conditions. Comply with cold-weather construction requirements contained in ACI 530.1/ASCE 6/TMS 602. 1. Cold-Weather Cleaning: Use liquid cleaning methods only when air temperature is 40 deg F and above and will remain so until masonry has dried, but not less than 7 days after completing cleaning. E. Hot-Weather Requirements: Comply with hot-weather construction requirements contained in ACI 530.1/ASCE 6/TMS 602. 1. When ambient temperature exceeds 100 def F or 90 deg F with a wind velocity greater than 8 M.P.H., do not spread mortar beds more than 48 inches ahead of masonry. Set masonry units within one minute of spreading mortar. MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 PART 2 - PRODUCTS 2.1 MANUFACTURERS A. In other Part 2 articles where titles below introduce lists, the following requirements apply to product selection: 1. Products: Subject to compliance with requirements, provide one of the products specified. 2. Manufacturers: Subject to compliance with requirements, provide products by one of the manufacturers specified. 2.2 MASONRY UNITS, GENERAL A. Defective Units: Referenced masonry unit standards may allow a certain percentage of units to exceed tolerances and to contain chips, cracks, or other defects exceeding limits stated in the standard. Do not use units where such defects, including dimensions that vary from specified dimensions by more than stated tolerances, will be exposed in the completed Work or will impair the quality of completed masonry. 2.3 CONCRETE MASONRY UNITS (CMUs) A. Shapes: Provide shapes indicated and as follows: 1. Provide special shapes for lintels, corners, jambs, sashes, movement joints, headers, bonding, and other special conditions. 2. Provide bullnose units for exposed outside corners, unless otherwise indicated. 3. Provide square-edged units for all other outside corners, unless otherwise indicated. B. Integral Water Repellent: Provide units made with integral water repellent where indicated. 1. Integral Water Repellent: Liquid polymeric, integral water-repellent admixture that does not reduce flexural bond strength. Units made with integral water repellent, when tested as a wall assembly made with mortar containing integral water-repellent manufacturer's mortar additive according to ASTM E 514, with test period extended to 24 hours, show no visible water or leaks on the back of test specimen. a. Products: 1) Addiment Incorporated; Block Plus W-10. 2) Grace Construction Products, a unit of W. R. Grace & Co. - Conn.; Dry- Block. 3) Master Builders, Inc.; Rheopel. C. Concrete Masonry Units: ASTM C 90 1. Unit Compressive Strength: Provide units with minimum average net-area compressive strength of 2800 psi. 2. Weight Classification: Normal weight. 3. Design compressive strength of masonry shall be not less than f’m = 2000 psi. 4. Provide Type 1, moisture-controlled units. 5. Size (Width): Manufactured to dimensions 3/8 inch less than nominal dimensions. 6. Exposed Faces: Provide color and texture matching the range represented by Architect's sample. 7. Faces to Receive Plaster: Where units are indicated to receive a direct application of plaster, provide textured-face units made with gap-graded aggregates. MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 2.4 CONCRETE LINTELS A. General: Provide concrete lintels, complying with requirements below. B. Concrete Lintels: Pre-cast units made from concrete matching concrete masonry units in color, texture, and compressive strength and with reinforcing bars indicated or required to support loads indicated. Cure pre-cast lintels by same method used for concrete masonry units. 2.5 MORTAR AND GROUT MATERIALS A. Portland Cement: ASTM C 150, Type I or II, except Type III may be used for cold-weather construction. Provide natural color or white cement as required to produce mortar color indicated. B. Hydrated Lime: ASTM C 207, Type S. C. Portland Cement-Lime Mix: Packaged blend of portland cement complying with ASTM C 270, portland cement-lime mortar: 1. Type S for all masonry. D. Masonry Cement: ASTM C 91 inorganic oxide mortar pigments. 1. For colored-aggregate mortar, use natural color or white cement as necessary to produce required mortar color. E. Aggregate for Mortar: ASTM C 144. 1. For mortar that is exposed to view, use washed aggregate consisting of natural sand or crushed stone. 2. For joints less than 1/4 inch thick, use aggregate graded with 100 percent passing the No. 16 sieve. 3. White-Mortar Aggregates: Natural white sand or crushed white stone. 4. Colored-Mortar Aggregates: Natural sand or crushed stone of color necessary to produce required mortar color. F. Aggregate for Grout: ASTM C 404. G. Cold-Weather Admixture: Non-chloride, non-corrosive, accelerating admixture complying with ASTM C 494, Type C, and recommended by manufacturer for use in masonry mortar of composition indicated. 1. Products: a. Addiment Incorporated; Mortar Kick. b. Euclid Chemical Company (The); Accelguard 80. c. Grace Construction Products, a unit of W. R. Grace & Co. - Conn.; Morset. d. Sonneborn, Div. of ChemRex; Trimix-NCA. H. Water-Repellent Admixture: Liquid water-repellent mortar admixture intended for use with concrete masonry units only, containing integral water repellent by same manufacturer. 1. Products: a. Addiment Incorporated; Mortar Tite. b. Grace Construction Products, a unit of W. R. Grace & Co. - Conn.; Dry-Block Mortar Admixture. c. Master Builders, Inc.; Color Cure Mortar Admix or Rheomix Rheopel. MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 I. Water: Potable. 2.6 REINFORCEMENT A. Uncoated Steel Reinforcing Bars: ASTM A 615 or ASTM A 99, Grade 60. B. Masonry Joint Reinforcement, General: ASTM A 951. 1. Exterior Walls: Hot-dip galvanized, carbon steel. 2. Wire Size for Side Rods: W1.7 or 0.148-inch diameter. 3. Wire Size for Cross Rods: W1.7 or 0.148-inchdiameter. 4. Wire Size for Veneer Ties: W1.7 or 0.148-inch diameter. 5. Spacing of Cross Rods, Tabs, and Cross Ties: Not more than 16 inches o.c. 6. Provide in lengths of not less than 10 feet. C. CMU Horizontal Joint Reinforcement 1. Ladder type horizontal joint reinforcement meeting ASTM A 615 Grade 60 (Fy= 60 ksi). Reinforcement side rods and cross rods shall be 9 gauge wire, galvanized, maximum width 4 inches (nominal) Model 220 Ladder Mesh manufactured by Hohmann and Barnard, Inc. 2.7 TIES AND ANCHORS A. Materials: Provide ties and anchors specified in subsequent paragraphs that are made from materials that comply with subparagraphs below, unless otherwise indicated. 1. Hot-Dip Galvanized, Carbon-Steel Wire: ASTM A 82; with ASTM A 153, Class B-2 coating. 2. Stainless Steel Bars: ASTM A 276 pf, ASTM A 666, Type 304. B. Wire Ties, General: Unless otherwise indicated, size wire ties to extend at least halfway through veneer but with at least 5/8-inch cover on outside face. Outer ends of wires are bent 90 degrees and extend 2 inches parallel to face of veneer. C. Individual Wire Ties: Rectangular units with closed ends and not less than 4 inches wide. 1. Z-shaped ties with ends bent 90 degrees to provide hooks not less than 2 inches long may be used for masonry constructed from solid units or hollow units laid with cells horizontal. 2. Where wythes do not align or are of different materials, use adjustable ties with pintle- and-eye connections having a maximum adjustment of 1-1/4 inches. 3. Wire: Fabricate from 3/16-inch- diameter, stainless-steel wire. Mill-galvanized wire ties may be used in interior walls, unless otherwise indicated. 2.8 MISCELLANEOUS ANCHORS A. Anchor Bolts: Headed or L-shaped steel bolts complying with ASTM A 307, Grade A ; with ASTM A 563 hex nuts and, where indicated, flat washers; hot-dip galvanized to comply with ASTM A 153, Class C; of dimensions indicated. B. Post-installed Anchors: Provide chemical or torque-controlled expansion anchors, with capability to sustain, without failure, a load equal to six times the load imposed when installed in solid or grouted unit masonry and equal to four times the load imposed when installed in MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 concrete, as determined by testing per ASTM E 488 conducted by a qualified independent testing agency. 1. Corrosion Protection: Carbon-steel components zinc plated to comply with ASTM B 633, Class Fe/Zn 5 (5 microns) for Class SC 1 service condition (mild). 2. Corrosion Protection: Stainless-steel components complying with ASTM F 593 and ASTM F 594, Alloy Group 1 or 2 for bolts and nuts; ASTM A 666 or ASTM A 276, Type 304 or 316, for anchors. 2.9 EMBEDDED FLASHING MATERIALS A. Rigid Metal Flashing: Provide rigid metal flashing, where flashing is partly exposed to exterior, complying with SMACNA's "Architectural Sheet Metal Manual and Division 07 Section "Sheet Metal Flashing and Trim" and as follows: 1. Fabricate metal drip edges from sheet metal indicated above. Extend at least 3 inches into wall and 1/2 inch out from wall, with a hemmed outer edge bent down 30 degrees. 2. Fabricate metal flashing terminations from sheet metal indicated above. Extend at least 3 inches into wall and out to exterior face of wall. At exterior face of wall, bend metal back on itself for 3/4 inch and then down into joint 3/8 inch to form a stop for retaining sealant backer rod. 3. Visible Masonry Flashing: For flashing partly exposed to the exterior, used at intersections between masonry and shingles, roofing, siding or other differing materials; with or without counter-flashing, such as chimney brick meeting shingled roofs using step flashing and counter-flashing; at intersecting plaza paver deck meeting brick walls, where a turned-up flashing-counter-flashing arrangement is detailed; and similar situations at intersecting materials use of metal flashing specified herein: a. Copper Counter-flashing, Step Flashing, and Other Architectural Flashing: 16 oz. /s.f. weight or 0.0216 inch thick elsewhere. b. Fabricate counter-flashing, step flashing, and other architectural flashing in accordance with SMACNA “Architectural Sheet Metal Manual.” B. Flexible Flashing: For all embedded masonry through-wall flashing of base course, lintels, sills, relieving angles, dissimilar material coursing, and other embedded through-wall masonry flashing, not exposed to the exterior, use a full, single sheet of 3 ounce copper sheet with O60 temper conforming to ASTM B-370-98 bonded with a proprietary rubber based adhesive, between one layer of fiberglass sheeting and one layer non-woven wicking fabric laminated to the copper sheet for cavity wall water/moisture drainage/mortar deflection. 1. Products: a. York Manufacturing, Inc., 3oz. Flash-Vent (Yellow Label). b. Corner and splice material: York Multi-Flash 500 flashing c. Sealant: UniverSeal US-100 polyether sealant by York Mfg or GreatSeal LT-100 polyether sealant by STS Coatings, or approved equal. d. Width of flashing to meet requirements described herein. 2.10 MISCELLANEOUS MASONRY ACCESSORIES A. Reinforcing Bar Positioners: Wire units designed to fit into mortar bed joints spanning masonry unit cells with loops for holding reinforcing bars in center of cells. Units are formed from 0.142- inch steel wire, hot-dip galvanized after fabrication. Provide units with either two loops or four loops as needed for number of bars indicated. 1. Products: a. Dayton Superior Corporation, Dur-O-Wal Division; D/A 810, D/A 812 or D/A 817. MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 b. Heckmann Building Products Inc.; No. 376 Rebar Positioner. c. Hohmann & Barnard, Inc.; # RB or # RB-Twin Rebar Positioner. d. Wire-Bond; O-Ring or Double O-Ring Rebar Positioner. B. Reinforcing Bar Positioners: Wire units designed to fit into mortar bed joints spanning masonry unit cells with loops for holding reinforcing bars in center of cells. Units are formed from 0.142- inch steel wire, hot-dip galvanized after fabrication. Provide units with either two loops or four loops as needed for number of bars indicated. 2.11 MASONRY CLEANERS A. Proprietary Acidic Cleaner: Manufacturer's standard-strength cleaner designed for removing mortar/grout stains, efflorescence, and other new construction stains from new masonry without discoloring or damaging masonry surfaces. Use product expressly approved for intended use by cleaner manufacturer and manufacturer of masonry units being cleaned. 1. Vanitrol or equal. 2.12 MORTAR AND GROUT MIXES A. General: Do not use admixtures, including pigments, air-entraining agents, accelerators, retarders, water-repellent agents, antifreeze compounds, or other admixtures, unless otherwise indicated. 1. Do not use calcium chloride in mortar or grout. B. Pre-blended, Dry Mortar Mix: Furnish dry mortar ingredients in form of a pre-blended mix. Measure quantities by weight to ensure accurate proportions, and thoroughly blend ingredients before delivering to Project site. C. Mortar for Unit Masonry: Comply with ASTM C 270 and BIA Technical Notes 8A, Proportion Specification. Provide the following types of mortar for applications stated unless another type is indicated or needed to provide required compressive strength of masonry. 1. Use Type S mortar for all applications. 2. Limit cementitious materials in mortar to portland cement, mortar cement, and lime. D. Grout for Unit Masonry: Comply with ASTM C 476. 1. Use coarse grout of that will comply with Table 5 in ACI 530.1/ASCE 6/TMS 602 for dimensions of grout spaces and pour height. 2. Provide grout with a slump of 8 plus/minus 1 inch as measured according to ASTM C 143. 3. Grout minimum compressive strength shall be 3,000 psi. 4. Do not use mortar for grout. 5. Grout solid all masonry units below grade. 6. Grout solid all masonry units containing reinforcing steel. 7. Grout solid all masonry units supporting steel beams or lintels at least two full courses below bearing elevation. 2.13 SOURCE QUALITY CONTROL A. Owner will engage a qualified independent testing agency to perform source quality-control testing indicated below: MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 1. Payment for these services will be made by Owner 2. Retesting of materials failing to comply with specified requirements shall be done at Contractor's expense. B. Concrete Masonry Unit Test: For each type of unit furnished, per ASTM C 140. PART 3 - EXECUTION 3.1 EXAMINATION A. Examine conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of work. 1. For the record, prepare written report, endorsed by Installer, listing conditions detrimental to performance of work. 2. Verify that foundations are within tolerances specified. 3. Verify that reinforcing dowels are properly placed. B. Before installation, examine rough-in and built-in construction for piping systems to verify actual locations of piping connections. C. Proceed with installation only after unsatisfactory conditions have been corrected. 3.2 INSTALLATION, GENERAL A. Thickness: Build cavity and composite walls and other masonry construction to full thickness shown. Build single-wythe walls to actual widths of masonry units, using units of widths indicated. B. Build chases and recesses to accommodate items specified in this and other Sections. C. Leave openings for equipment to be installed before completing masonry. After installing equipment, complete masonry to match the construction immediately adjacent to opening. D. Use full-size units without cutting if possible. If cutting is required to provide a continuous pattern or to fit adjoining construction, cut units with motor-driven saws; provide clean, sharp, un-chipped edges. Allow units to dry before laying unless wetting of units is specified. Install cut units with cut surfaces and, where possible, cut edges concealed. E. Select and arrange units for exposed unit masonry to produce a uniform blend of colors and textures. 1. Mix units from several pallets or cubes as they are placed. F. Comply with PCA “Recommended Practices for Laying Concrete Block” and the TEC Notes 11, 11A, 11B, 11C, 11D, 11E, and NCMA TEC Bulletins. G. Comply with construction tolerances in ACI 530.1/ASCE 6/TMS 602 and with the following: 1. For conspicuous vertical lines, such as external corners, door jambs, reveals, and expansion and control joints, do not vary from plumb by more than 1/8 inch in 10 feet, 1/4 inch in 20 feet, or 1/2 inch maximum. MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 2. For vertical alignment of exposed head joints, do not vary from plumb by more than 1/4 inch in 10 feet, or 1/2 inch maximum. 3. For conspicuous horizontal lines, such as lintels, sills, parapets, and reveals, do not vary from level by more than 1/8 inch in 10 feet, 1/4 inch in 20 feet, or 1/2 inch maximum. 4. For exposed bed joints, do not vary from thickness indicated by more than plus or minus 1/8 inch, with a maximum thickness limited to 1/2 inch. Do not vary from bed-joint thickness of adjacent courses by more than 1/8 inch. 5. For exposed head joints, do not vary from thickness indicated by more than plus or minus 1/8 inch. Do not vary from adjacent bed-joint and head-joint thicknesses by more than 1/8 inch. 6. For faces of adjacent exposed masonry units, do not vary from flush alignment by more than 1/16 inch except due to warpage of masonry units within tolerances specified for warpage of units. 7. For exposed bed joints and head joints of stacked bond, do not vary from a straight line by more than 1/16 inch from one masonry unit to the next. 3.3 LAYING MASONRY WALLS A. Lay out walls in advance for accurate spacing of surface bond patterns with uniform joint thicknesses and for accurate location of openings, movement-type joints, returns, and offsets. Avoid using less-than-half-size units, particularly at corners, jambs, and, where possible, at other locations. B. Bond Pattern for Exposed Masonry: Unless otherwise indicated, lay exposed masonry in one- half running bond; do not use units with less than nominal 4-inch horizontal face dimensions at corners or jambs. C. Lay concealed masonry with all units in a wythe in running bond or bonded by lapping not less than 2 inches. Bond and interlock each course of each wythe at corners. Do not use units with less than nominal 4-inch horizontal face dimensions at corners or jambs. D. Stopping and Resuming Work: Stop work by racking back units in each course from those in course below; do not tooth. When resuming work, clean masonry surfaces that are to receive mortar, remove loose masonry units and mortar, and wet brick if required before laying fresh masonry. E. Built-in Work: As construction progresses, build in items specified in this and other Sections. Fill in solidly with masonry around built-in items. F. Fill space between steel frames and masonry solidly with mortar, unless otherwise indicated. G. Where built-in items are to be embedded in cores of hollow masonry units, place a layer of metal lath, wire mesh, or plastic mesh in the joint below and rod mortar or grout into core. H. Fill cores in hollow concrete masonry units with grout 24 inches under bearing plates, beams, lintels, posts, and similar items, unless otherwise indicated. 3.4 MORTAR BEDDING AND JOINTING A. Lay concrete masonry units as follows: 1. With face shells fully bedded in mortar and with head joints of depth equal to bed joints. MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 2. With webs fully bedded in mortar in all courses of piers, columns, and pilasters. 3. With webs fully bedded in mortar in grouted masonry, including starting course on footings. 4. With entire units, including areas under cells, fully bedded in mortar at starting course on footings where cells are not grouted. B. Lay hollow masonry units as follows: 1. With full mortar coverage on horizontal and vertical face shells. 2. Bed webs in mortar in starting course on footings and in all courses of piers, columns, and pilasters, and where adjacent to cells or cavities to be filled with grout. 3. For starting course on footings where cells are not grouted, spread out full mortar bed, including areas under cells. C. Lay solid masonry units with completely filled bed and head joints; butter ends with sufficient mortar to fill head joints and shove into place. Do not deeply furrow bed joints or slush head joints. D. Tool exposed joints slightly concave when thumbprint hard, using a jointer larger than joint thickness, unless otherwise indicated. 1. For glazed masonry units, use a nonmetallic jointer 3/4 inch or more in width. E. Cut joints flush for masonry walls to receive plaster or other direct-applied finishes (other than paint), unless otherwise indicated. 3.5 MASONRY JOINT REINFORCEMENT A. General: Install entire length of longitudinal side rods in mortar with a minimum cover of 5/8 inch on exterior side of walls, 1/2 inch elsewhere. Lap reinforcement a minimum of 6 inches. 1. Space reinforcement not more than 16 inches o.c. 2. Space reinforcement not more than 8 inches o.c. in foundation walls and parapet walls. 3. Provide reinforcement not more than 8 inches above and below wall openings and extending 12 inches beyond openings. a. Reinforcement above is in addition to continuous reinforcement. B. Interrupt joint reinforcement at control and expansion joints, unless otherwise indicated. C. Provide continuity at wall intersections by using prefabricated T-shaped units. D. Provide continuity at corners by using prefabricated L-shaped units. E. Cut and bend reinforcing units as directed by manufacturer for continuity at corners, returns, offsets, column fireproofing, pipe enclosures, and other special conditions. 3.6 ANCHORING MASONRY TO STRUCTURAL STEEL AND CONCRETE MEMBERS A. Anchor masonry to structural members where masonry abuts or faces structural members to comply with the following: 1. Provide an open space not less than 1 inch in width between masonry and structural member, unless otherwise indicated. Keep open space free of mortar and other rigid materials. MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 2. Anchor masonry to structural members with anchors embedded in masonry joints and attached to structure. 3. Space anchors as indicated, but not more than 18 inches o.c. vertically and 16 inches o.c. horizontally. 3.7 CONTROL AND EXPANSION JOINTS A. General: Install control and expansion joints in unit masonry where required by BIA Tech Notes, where shown on Drawings, and where described herein, but in no case shall expansion joints be located greater than 30 feet o.c. Expansion joint construction shall conform to published standards of BIA and shall be properly reinforced and anchored to prevent differential settlement or lateral displacement between veneer faces. Build-in related items as masonry progresses. Do not form a continuous span through movement joints unless provisions are made to prevent in-place restraint of wall or partition movement. B. Form control joints in concrete masonry as follows: 1. Fit bond-breaker strips into hollow contour in ends of concrete masonry units on one side of control joint. Fill resultant core with grout and rake out joints in exposed faces for application of sealant. 2. Install preformed control-joint gaskets designed to fit standard sash block. 3. Install interlocking units designed for control joints. Install bond-breaker strips at joint. Keep head joints free and clear of mortar or rake out joint for application of sealant. 4. Install temporary foam-plastic filler in head joints and remove filler when unit masonry is complete for application of sealant. C. Provide horizontal, pressure-relieving joints by either leaving an air space or inserting a compressible filler of width required for installing sealant and backer rod specified in Division 07 Section "Joint Sealants," but not less than 3/8 inch. 1. Locate horizontal, pressure-relieving joints beneath shelf angles supporting masonry. 3.8 LINTELS A. Install steel lintels where indicated. B. Provide concrete lintels where shown and where openings of more than 12 inches for brick-size units and 24 inches for block-size units are shown without structural steel or other supporting lintels. C. Provide minimum bearing of 8 inches at each jamb, unless otherwise indicated. 3.9 FLASHING A. General: Install through-wall embedded flashing in masonry at shelf angles, lintels, ledges, other obstructions to downward flow of water in wall, and where indicated. B. Install through-wall embedded flexible flashing as follows, unless otherwise indicated: 1. Apply all through-wall embedded flexible flashing with wicking surface to the outside. 2. Prepare masonry surfaces so they are smooth and free from projections that could puncture flashing. Where flashing is within mortar joint, place through-wall flashing in a bed of UniverSeal US-100 polyether sealant or equal utilizing specially designed nozzle MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 recommended by manufacturer and topped with a fresh full bed of mortar. Provide adequate width to permit flashing to be trimmed flush with the exterior face of the wall after inspection. Before covering with mortar, seal penetrations in flashing with adhesive, sealant, or tape as recommended by flashing manufacturer. 3. At base courses, use flashing width required to trim flush with the outside face of exterior wythe after inspection. Extend flashing through veneer, across air space behind veneer, and up face of sheathing at least 8 inches; embed top edge of flashing in a continuous bead of UniverSeal US-100 polyether sealant or equal utilizing specially designed nozzle recommended by manufacturer; coat flashing with liquid-applied vapor permeable barrier system, lapping at least 4 inches. 4. At lintels, shelf angles relieving angles, and other steel brick supports, extend flashing a minimum of 6 inches into masonry at each bearing end and turn up not less than 2 inches to form end dams or a pan. Extend flashing up face of sheathing a minimum of 6 inches above top edge of steel lintel’s vertical leg; embed top edge of flashing in a continuous bead of UniverSeal US-100 polyether sealant or equal utilizing specially designed nozzle recommended by manufacturer; coat flashing with liquid-applied vapor permeable barrier system, lapping at least 4 inches. 5. Where exposed flashing or drip edge is required, install rigid metal flashing termination beneath flexible flashing at exterior face of wall. Trim flexible flashing flush with face of wall. 6. Cut flexible flashing off flush with face of wall after masonry wall construction is completed and inspected. C. Install single-wythe CMU flashing system in bed joints of CMU walls where indicated to comply with manufacturer's written instructions. Install CMU cell pans with upturned edges located below face shells and webs of CMUs above and with flexible flashing installed per manufacturer’s instructions. Install CMU web covers so that they cover upturned edges of CMU cell pans at CMU webs and extend from face shell to face shell. D. Install reglets and nailers for flashing and other related construction where they are shown to be built into masonry. 3.10 REINFORCED UNIT MASONRY INSTALLATION A. Temporary Formwork and Shores: Construct formwork and shores as needed to support reinforced masonry elements during construction. 1. Construct formwork to provide shape, line, and dimensions of completed masonry as indicated. Make forms sufficiently tight to prevent leakage of mortar and grout. Brace, tie, and support forms to maintain position and shape during construction and curing of reinforced masonry. 2. Do not remove forms and shores until reinforced masonry members have hardened sufficiently to carry their own weight and other temporary loads that may be placed on them during construction. B. Placing Reinforcement: Comply with requirements in ACI 530.1/ASCE 6/TMS 602. C. Grouting: Do not place grout until entire height of masonry to be grouted has attained enough strength to resist grout pressure. 1. Comply with requirements in ACI 530.1/ASCE 6/TMS 602 for cleanouts and for grout placement, including minimum grout space and maximum pour height. 2. Limit height of vertical grout pours to not more than 60 inches. MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 3.11 FIELD QUALITY CONTROL A. Inspectors: Owner will engage qualified independent inspectors to perform inspections and prepare reports. Allow inspectors access to scaffolding and work areas, as needed to perform inspections. 1. Place grout only after inspectors have verified compliance of grout spaces and grades, sizes, and locations of reinforcement. B. Testing Agency: Owner will engage a qualified independent testing and inspecting agency to perform field tests and inspections indicated below and prepare test reports: 1. Payment for these services will be made by Owner. 2. Retesting of materials failing to comply with specified requirements shall be done at Contractor's expense. C. Testing Frequency: One set of tests for each 5000 sq. ft. of wall area or portion thereof. D. Concrete Masonry Unit Test: For each type of unit provided, per ASTM C 140. E. Mortar Test (Property Specification): For each mix provided, per ASTM C 780. Test mortar for mortar air content and compressive strength F. Grout Test (Compressive Strength): For each mix provided, per ASTM C 1019. G. Prism Test: For each type of construction provided, per ASTM C 1314 at 7 days and at 28 days. 3.12 PARGING A. Parge exterior faces of below-grade masonry walls, where indicated, in 2 uniform coats to a total thickness of 3/4 inch. Dampen wall before applying first coat and scarify first coat to ensure full bond to subsequent coat. B. Use a steel-trowel finish to produce a smooth, flat, dense surface with a maximum surface variation of 1/8 inch per foot. Form a wash at top of parging and a cove at bottom. C. Damp-cure parging for at least 24 hours and protect parging until cured. 3.13 REPAIRING, POINTING, AND CLEANING A. Remove and replace masonry units that are loose, chipped, broken, stained, or otherwise damaged or that do not match adjoining units. Install new units to match adjoining units; install in fresh mortar, pointed to eliminate evidence of replacement. B. Pointing: During the tooling of joints, enlarge voids and holes, except weep holes, and completely fill with mortar. Point up joints, including corners, openings, and adjacent construction, to provide a neat, uniform appearance. Prepare joints for sealant application, where indicated. C. In-Progress Cleaning: Clean unit masonry as work progresses by dry brushing to remove mortar fins and smears before tooling joints. MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 04 20 00 - CARMEL CITY CENTER Date 03.26.12 UNIT MASONRY MATT THE MILLER’S; CARMEL CITY CENTER; SUITE 101 D. Final Cleaning: After mortar is thoroughly set and cured, clean exposed masonry as follows: 1. Remove large mortar particles by hand with wooden paddles and nonmetallic scrape hoes or chisels. 2. Test cleaning methods on sample wall panel; leave one-half of panel un-cleaned for comparison purposes. Obtain Architect's approval of sample cleaning before proceeding with cleaning of masonry. 3. Protect adjacent stone and non-masonry surfaces from contact with cleaner by covering them with liquid strippable masking agent or polyethylene film and waterproof masking tape. 4. Wet wall surfaces with water before applying cleaners; remove cleaners promptly by rinsing surfaces thoroughly with clear water. 5. Clean masonry with a proprietary acidic cleaner applied according to manufacturer's written instructions. 6. Clean concrete masonry by cleaning method indicated in NCMA TEK 8-2A applicable to type of stain on exposed surfaces. 3.14 MASONRY WASTE DISPOSAL A. Salvageable Materials: Unless otherwise indicated, excess masonry materials are Contractor's property. At completion of unit masonry work, remove from Project site. B. Excess Masonry Waste: Remove excess clean masonry waste that cannot be used as fill, as described above, and other masonry waste, and legally dispose of off Owner's property. END OF SECTION 04 20 00