Weatherbee, Stephanie

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University of New HampshireUniversity of New Hampshire Scholars' RepositoryDivision 04 – Masonry Chapter 5 – Technical Construction andRenovation Standards1-25-2013042000 - Unit MasonrySandra Hickeysandra.hickey@unh.eduFollow this and additional works at: https://scholars.unh.edu/pdch_5_04This Article is brought to you for free and open access by the Chapter 5 – Technical Construction and Renovation Standards at University of NewHampshire Scholars' Repository. It has been accepted for inclusion in Division 04 – Masonry by an authorized administrator of University of NewHampshire Scholars' Repository. For more information, please contact nicole.hentz@unh.edu.Recommended CitationHickey, Sandra, "042000 - Unit Masonry" (2013). Division 04 – Masonry. 2.https://scholars.unh.edu/pdch_5_04/2UNIVERSITY of  NEW HAMPSHIRE    PLANNING, DESIGN AND CONSTRUCTION GUIDELINES January 25, 2013 CHAPTER 5 – TECHNICAL CONSTRUCTION AND RENOVATION STANDARDS UNIT MASONRY  04 2000 - 1 SECTION 04 2000 - UNIT MASONRY  1.1 SUMMARY A. Section Includes: 1. Concrete masonry units (CMU's). 2. Concrete building brick. 3. Concrete facing brick. 4. Face brick. B. General:    1. Face brick shall be standard size, water-struck or equal, red with a range of flash  to match brick used in that part of campus. 2. No single-wythe masonry walls allowed. 3. All masonry accessories shall be stainless-steel. 4. University is open to ‘Expressive Brick Design.” 5. For all historic structures, mortar joint profiles and mortar colors will specifically be approved by the University Architect. Mortar shall be tested to ensure compatibility with existing. 6. Sample panels shall be prepared for all proposed exterior materials. 7. Bricks shall be obtained from Regional suppliers within a 500 mile radius of the University, preferably brick that is manufactured in northern New England. 1.2 SUBMITTALS A. LEED Submittals: 1. Product Certificates for Credit MR 5.1 and Credit MR 5.2:  For products and materials required to comply with requirements for regional materials indicating location and distance from Project of material manufacturer and point of extraction, harvest, or recovery for each raw material.  Include statement indicating cost for each regional material and the fraction by weight that is considered regional. 1.3 QUALITY ASSURANCE A. Masonry Standard:  Comply with ACI 530.1/ASCE 6/TMS 602 unless modified by requirements in the Contract Documents. 1.4 PROJECT CONDITIONS A. 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. UNIVERSITY of  NEW HAMPSHIRE    PLANNING, DESIGN AND CONSTRUCTION GUIDELINES January 25, 2013 CHAPTER 5 – TECHNICAL CONSTRUCTION AND RENOVATION STANDARDS UNIT MASONRY  04 2000 - 2 B. Hot-Weather Requirements:  Comply with hot-weather construction requirements contained in ACI 530.1/ASCE 6/TMS 602. 1.5 MASONRY UNITS, GENERAL A. Defective Units:  Referenced masonry unit standards may allow a certain percentage of units to contain chips, cracks, or other defects exceeding limits stated in the standard.  Do not use units where such defects will be exposed in the completed Work. B. Fire-Resistance Ratings:  Where indicated, provide units that comply with requirements for fire-resistance ratings indicated as determined by testing according to ASTM E 119, by equivalent masonry thickness, or by other means, as acceptable to authorities having jurisdiction. 1.6 CONCRETE MASONRY UNITS A. Regional Materials:  Provide CMUs that have been manufactured within 500 miles (800 km) of Project site from aggregates and cement that have been extracted, harvested, or recovered, as well as manufactured, within 500 miles (800 km) of Project site. B. Shapes:  Provide shapes indicated and for lintels, corners, jambs, sashes, movement joints, headers, bonding, and other special conditions.  1. Provide bullnose units for outside corners on all interior walls, unless otherwise indicated. C. CMUs:  ASTM C 90. D. Concrete Building Brick:  ASTM C 55. E. Decorative CMUs:  ASTM C 90. F. Concrete Facing Brick:  ASTM C 1634. 1.7 CONCRETE AND MASONRY LINTELS A. Concrete Lintels:  ASTM C 1623, matching CMUs in color, texture, and density classification; and with reinforcing bars indicated.  Provide lintels with net-area compressive strength not less than CMUs. B. Masonry Lintels:  Prefabricated or built-in-place masonry lintels made from bond beam CMUs with reinforcing bars placed as indicated and filled with coarse grout. 1.8 BRICK A. Regional Materials:  Provide brick that has been manufactured within 500 miles (800 km) of Project site from materials that have been extracted, harvested, or recovered, as well as manufactured, within 500 miles (800 km) of Project site. UNIVERSITY of  NEW HAMPSHIRE    PLANNING, DESIGN AND CONSTRUCTION GUIDELINES January 25, 2013 CHAPTER 5 – TECHNICAL CONSTRUCTION AND RENOVATION STANDARDS UNIT MASONRY  04 2000 - 3 B. General:  Provide shapes indicated and as follows: 1. For ends of sills and caps and for similar applications that would otherwise expose unfinished brick surfaces, provide units without cores or frogs and with exposed surfaces finished. 2. Provide special shapes for applications where shapes produced by sawing would result in sawed surfaces being exposed to view. C. Face Brick:  Facing brick complying with ASTM C 216. 1. Grade:  SW. 2. Type:  FBX. 3. Initial Rate of Absorption:  Less than 30 g/30 sq. in. (30 g/194 sq. cm) per minute when tested per ASTM C 67. 4. Efflorescence:  Provide brick that has been tested according to ASTM C 67 and is rated "not effloresced." 5. Surface Coating:  Brick with colors or textures produced by application of coatings shall withstand 50 cycles of freezing and thawing per ASTM C 67 with no observable difference in the applied finish when viewed from 10 feet (3 m). 1.9 MORTAR AND GROUT MATERIALS A. Regional Materials:  Provide aggregate for mortar and grout, cement, and lime that have been extracted, harvested, or recovered, as well as manufactured, within 500 miles (800 km) of Project site. B. 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. C. Hydrated Lime:  ASTM C 207, Type S. D. Portland Cement-Lime Mix:  Packaged blend of portland cement and hydrated lime containing no other ingredients. 1.10 REINFORCEMENT A. Uncoated Steel Reinforcing Bars:  ASTM A 615/A 615M or ASTM A 996/A 996M, Grade 60 (Grade 420). B. Masonry Joint Reinforcement, General:  ASTM A 951/A 951M. 1. Interior Walls:  Hot-dip galvanized, carbon steel. 2. Exterior Walls:  Stainless steel. 1.11 TIES AND ANCHORS A. Materials:  Provide ties and anchors specified in this article that are made from materials that comply with the following unless otherwise indicated. UNIVERSITY of  NEW HAMPSHIRE    PLANNING, DESIGN AND CONSTRUCTION GUIDELINES January 25, 2013 CHAPTER 5 – TECHNICAL CONSTRUCTION AND RENOVATION STANDARDS UNIT MASONRY  04 2000 - 4 1. Hot-Dip Galvanized, Carbon-Steel Wire:  ASTM A 82/A 82M; with ASTM A 153/A 153M, Class B-2 coating. 2. Steel Sheet, Galvanized after Fabrication:  ASTM A 1008/A 1008M, Commercial Steel, with ASTM A 153/A 153M, Class B coating. 3. Steel Plates, Shapes, and Bars:  ASTM A 36/A 36M. 4. Stainless-Steel Wire:  ASTM A 580/A 580M, Type 304. 5. Stainless-Steel Sheet:  ASTM A 666, Type 304. 6. Stainless-Steel Bars:  ASTM A 276 or 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 (16-mm) cover on outside face.  Outer ends of wires are bent 90 degrees and extend 2 inches (50 mm) parallel to face of veneer. C. Individual Wire Ties:  Rectangular units with closed ends and not less than 4 inches (100 mm) wide. 1. Wire:  Fabricate from 3/16-inch- (4.76-mm-) diameter, stainless-steel wire. 1.12 EMBEDDED FLASHING MATERIALS A. Metal Flashing:  Provide metal flashing complying with SMACNA's "Architectural Sheet Metal Manual" and as follows: 1. Metal Drip Edge:  Fabricate from stainless steel.  Extend at least 3 inches (76 mm) into wall and 1/2 inch (13 mm) out from wall, with outer edge bent down 30 degrees and hemmed. 2. Metal Sealant Stop:  Fabricate from stainless steel.  Extend at least 3 inches (76 mm) into wall and out to exterior face of wall.  At exterior face of wall, bend metal back on itself for 3/4 inch (19 mm) and down into joint 1/4 inch (6 mm) to form a stop for retaining sealant backer rod. B. Flexible Flashing:  Use one of the following unless otherwise indicated:  1. Copper-Laminated Flashing:  7-oz./sq. ft. (2-kg/sq. m) copper sheet bonded between 2 layers of glass-fiber cloth.  Use only where flashing is fully concealed in masonry. 2. Rubberized-Asphalt Flashing:  Composite flashing product consisting of a pliable, adhesive rubberized-asphalt compound, bonded to a high-density, cross-laminated polyethylene film to produce an overall thickness of not less than 0.040 inch (1.02 mm). 3. Elastomeric Thermoplastic Flashing:  Composite flashing product consisting of a polyester-reinforced ethylene interpolymer alloy. 4. EPDM Flashing:  Sheet flashing product made from ethylene-propylene-diene terpolymer, complying with ASTM D 4637, 0.040 inch (1.0 mm) thick. C. Adhesives, Primers, and Seam Tapes for Flashings:  Flashing manufacturer's standard products or products recommended by flashing manufacturer for bonding flashing sheets to each other and to substrates. UNIVERSITY of  NEW HAMPSHIRE    PLANNING, DESIGN AND CONSTRUCTION GUIDELINES January 25, 2013 CHAPTER 5 – TECHNICAL CONSTRUCTION AND RENOVATION STANDARDS UNIT MASONRY  04 2000 - 5 1.13 MISCELLANEOUS MASONRY ACCESSORIES A. Weep/Vent Products:  Use one of the following unless otherwise indicated:  1. Cellular Plastic Weep/Vent:  One-piece, flexible extrusion made from UV-resistant polypropylene copolymer, full height and width of head joint and depth 1/8 inch (3 mm) less than depth of outer wythe, in color selected from manufacturer's standard. 2. Mesh Weep/Vent:  Free-draining mesh; made from polyethylene strands, full height and width of head joint and depth 1/8 inch (3 mm) less than depth of outer wythe; in color selected from manufacturer's standard. 3. Vinyl Weep Hole/Vent:  T-shaped units made from flexible PVC, consisting of a louvered vertical leg, flexible wings to seal against ends of masonry units, and a top flap to keep mortar out of the head joint; in color selected by University. B. Cavity Drainage Material:  Free-draining mesh, made from polymer strands that will not degrade within the wall cavity. 1. See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers and Provide one of the following configurations: a. Strips, full-depth of cavity and 10 inches (250 mm) high, with dovetail shaped notches 7 inches (175 mm) deep. b. Strips, not less than 1-1/2 inches (38 mm) thick and 10 inches (250 mm) high, with dimpled surface designed to catch mortar droppings and prevent weep holes from clogging with mortar. c. Sheets or strips full depth of cavity and installed to full height of cavity. 1.14 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. B. Mortar for Unit Masonry:  Comply with ASTM C 270, Proportion Specification.  Provide the following types of mortar for applications stated unless another type is indicated. 1. For masonry below grade or in contact with earth, use Type S. 2. For reinforced masonry, use Type S. 3. For exterior, above-grade, load-bearing and non-load-bearing walls and parapet walls; for interior load-bearing walls; for interior non-load-bearing partitions; and for other applications where another type is not indicated, use Type N. 4. For interior non-load-bearing partitions, Type O may be used instead of Type N. C. Grout for Unit Masonry:  Comply with ASTM C 476. 1. Use grout of type indicated or, if not otherwise indicated, of type (fine or coarse) that will comply with Table 1.15.1 in ACI 530.1/ASCE 6/TMS 602 for dimensions of grout spaces and pour height. UNIVERSITY of  NEW HAMPSHIRE    PLANNING, DESIGN AND CONSTRUCTION GUIDELINES January 25, 2013 CHAPTER 5 – TECHNICAL CONSTRUCTION AND RENOVATION STANDARDS UNIT MASONRY  04 2000 - 6 1.15 INSTALLATION, GENERAL A. 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, unchipped 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. B. Select and arrange units for exposed unit masonry to produce a uniform blend of colors and textures. C. Wetting of Brick:  Wet brick before laying if initial rate of absorption exceeds 30 g/30 sq. in. (30 g/194 sq. cm) per minute when tested per ASTM C 67.  Allow units to absorb water so they are damp but not wet at time of laying. 1.16 TOLERANCES A. Joints: 1. For bed joints, do not vary from thickness indicated by more than plus or minus 1/8 inch (3 mm), with a maximum thickness limited to 1/2 inch (12 mm). 2. For head and collar joints, do not vary from thickness indicated by more than plus 3/8 inch (9 mm) or minus 1/4 inch (6 mm). 3. For exposed head joints, do not vary from thickness indicated by more than plus or minus 1/8 inch (3 mm). 1.17 LAYING MASONRY WALLS A. Bond Pattern for Exposed Masonry:  Unless otherwise indicated, lay exposed masonry in running bond; do not use units with less than nominal 4-inch (100-mm) horizontal face dimensions at corners or jambs. B. Fill cores in hollow CMUs with grout 24 inches (600 mm) under bearing plates, beams, lintels, posts, and similar items unless otherwise indicated. 1.18 MORTAR BEDDING AND JOINTING A. Tool exposed joints slightly concave when thumbprint hard, using a jointer larger than joint thickness unless otherwise indicated. B. Cut joints flush for masonry walls to receive plaster or other direct-applied finishes (other than paint) unless otherwise indicated. 1.19 REPAIRING, POINTING, AND CLEANING A. In-Progress Cleaning:  Clean unit masonry as work progresses by dry brushing to remove mortar fins and smears before tooling joints. UNIVERSITY of  NEW HAMPSHIRE    PLANNING, DESIGN AND CONSTRUCTION GUIDELINES January 25, 2013 CHAPTER 5 – TECHNICAL CONSTRUCTION AND RENOVATION STANDARDS UNIT MASONRY  04 2000 - 7 B. Final Cleaning:  After mortar is thoroughly set and cured, clean exposed masonry as follows:  1. Wet wall surfaces with water before applying cleaners; remove cleaners promptly by rinsing surfaces thoroughly with clear water. 2. Clean brick by bucket-and-brush hand-cleaning method described in BIA Technical Notes 20. 3. Repointing: mortar shall match existing in type and color. 4. Clean concrete masonry by cleaning method indicated in NCMA TEK 8-2A applicable to type of stain on exposed surfaces. 1.20 MASONRY WASTE DISPOSAL A. Waste Disposal as Fill Material:  Dispose of clean masonry waste, including excess or soil-contaminated sand, waste mortar, and broken masonry units, by crushing and mixing with fill material as fill is placed. 1. Do not dispose of masonry waste as fill within 18 inches (450 mm) of finished grade. 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 University’s property. END OF SECTION 04 2000 

042000 - Unit Masonry

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042000 - Unit Masonry

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