ࡱ> _ bjbjzyzy G/6b6b~~8FD,kj  ( (""<2# kkkkkkk$mo?ko&("("o&o&?k 4Tk111o&~  k1o&k11bdi :B*gjkjk0khvNp,NpiNpitR##r1d$\$R#R#R#?k?k3/R#R#R#ko&o&o&o&NpR#R#R#R#R#R#R#R#R#~B : SECTION 04 20 00 UNIT MASONRY GENERAL RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. SUMMARY Section Includes: Brick units. Concrete masonry units. Mortar and grout. Reinforcing steel. Joint reinforcement. Ties. Embedded flashing. Miscellaneous masonry accessories. REFERENCE STANDARDS The latest published edition of a reference shall be applicable to this Project unless identified by a specific edition date. Reference amendments adopted prior to the effective date of this Contract shall be applicable to this Project. Materials, installation and workmanship shall comply with all applicable requirements and standards. DEFINITIONS CMU(s): Concrete masonry unit(s). Reinforced Masonry: Masonry containing reinforcing steel in grouted cells. PREINSTALLATION MEETINGS Preinstallation Conference: Conduct conference at Project site. SUBMITTALS Product Date: For each type of product. Shop Drawings: For the following; Masonry Units: Show sizes, profiles, coursing, and locations of special shapes. Reinforcing Steel: Detail bending, lap lengths, and placement of unit masonry reinforcing bars. Comply with ACI315.[Show elevations of reinforced walls.] RETAIN "FABRICATED FLASHING" SUBPARAGRAPH BELOW FOR FLASHING MATERIAL THAT IS SPECIALLY FABRICATED FOR CORNERS, END DAMS, ETC. Fabricated Flashing: Detail corner units, end-dam units, and other special applications. Samples for Verification: For each type and color of the following: Exposed CMUs Face brick Special brick shapes. [Pigmented] [and] [colored-aggregate] mortar. Make Samples using same sand and mortar ingredients to be used on Project. Weep holes[and cavity vents]. Accessories embedded in masonry. RETAIN "LIST OF MATERIALS USED IN CONSTRUCTING MOCKUPS" PARAGRAPH BELOW FOR CRITICAL WORK WHERE RECORD OF MOCKUP MATERIALS IS DESIRED. List of Materials Used in Constructing Mockups: List generic product names together with manufacturers, manufacturers' product names, model numbers, lot numbers, batch numbers, source of supply, and other information as required to identify materials used. Include mix proportions for mortar and grout and source of aggregates. Submittal is for information only. Receipt of list does not constitute approval of deviations from the Contract Documents unless such deviations are specifically brought to the attention of Architect and approved in writing. Qualification Data: For testing agency. Material Certificates: For each type and size of the following: Masonry units. Include [data on material properties][material test reports substantiating compliance with requirements]. For brick, include size-variation data verifying that actual range of sizes falls within specified tolerances. For exposed brick, include test report for efflorescence according to ASTM C 67. Integral water repellent used in CMUs. Cementitious materials. Include name of manufacturer, brand name, and type. Mortar admixtures. Preblended, dry mortar mixes. Include description of type and proportions of ingredients. Grout mixes. Include description of type and proportions of ingredients. Reinforcing bars. Joint reinforcement. Anchors, ties, and metal accessories. Mix Designs: For each type of mortar[and grout]. Include description of type and proportions of ingredients. Include test reports for mortar mixes required to comply with property specification. Test according to ASTMC109/C109M for compressive strength, ASTMC1506 for water retention, and ASTMC91/C91M for air content. Include test reports, according to ASTMC1019, for grout mixes required to comply with compressive strength requirement. RETAIN "STATEMENT OF COMPRESSIVE STRENGTH OF MASONRY" PARAGRAPH BELOW ONLY IF RETAINING UNIT-STRENGTH METHOD IN "PERFORMANCE REQUIREMENTS" ARTICLE. 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, mortar type, and resulting net-area compressive strength of masonry determined according to TMS602/ACI530.1/ASCE6. Cold-Weather[and Hot-Weather] Procedures: Detailed description of methods, materials, and equipment to be used to comply with requirements. QUALITY ASSURANCE Single Source Responsibility for Masonry Units: Obtain exposed masonry units of uniform texture and color, or a uniform blend within the ranges accepted for these characteristics, from one manufacturer for each different product required for each continuous surface or visually related surfaces. Single Source Responsibility for Mortar Materials: Obtain mortar ingredients of uniform quality, including color for exposed masonry, from one manufacturer for each cementitious component and from one source and producer for each aggregate. Field Constructed Mock Ups: Prior to installation of unit masonry, erect sample wall panels to further verify selections made under sample submittals and to demonstrate aesthetic effects as well as qualities of materials and execution. Build mock ups to comply with the following requirements, using materials indicated for final unit of Work: Locate mock ups on Site in locations indicated or, if not indicated, as directed by Architect. Build mock ups for the following types of masonry in sizes of approximately 4 feet long by 4 feet high by full thickness, including face and backup wythes as well as accessories. Each type of exposed unit masonry construction. Typical exterior face brick wall. Typical exterior face brick wall with framed window opening. Typical interior unit masonry wall. Where masonry is to match existing, erect panels parallel to existing surface. Notify Architect one week in advance of the dates and times when mock ups will be erected. Protect mock ups from the elements with weather resistant membrane. Retain and maintain mock ups during construction in undisturbed condition as standard for judging completed unit masonry construction. When directed, demolish and remove mock ups from the Project Site. Accepted mock ups in undisturbed condition at time of Substantial Completion may become part of completed unit of Work. DELIVERY, STORAGE and HANDLING Deliver masonry materials to Project in undamaged condition. Store and handle masonry units off the ground, under cover, and in a dry location to prevent their deterioration or damage due to moisture, temperature changes, contaminants, corrosion, and other causes. If units become wet, do not place until units are in an air dried condition. Store cementitious materials off the ground, under cover, and in dry location. Store aggregates where grading and other required characteristics can be maintained and contamination avoided. Store masonry accessories including metal items to prevent corrosion and accumulation of dirt and oil. PROJECT CONDITIONS During erection, 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. Extend cover a minimum of 24 inches down both sides and hold cover securely in place. Where one wythe of multiwythe masonry walls is completed in advance of other wythes, secure cover a minimum of 24 inches down face next to unconstructed wythe and hold cover in place. 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. Stain Prevention: Prevent grout, mortar, and soil from staining the face of masonry to be left exposed or painted. Remove immediately any grout, mortar, and soil that comes in contact with such masonry. Protect base of walls from rain splashed mud and mortar splatter by means of coverings spread on ground and over wall surface. Protect sills, ledges, and projections from mortar droppings. Protect surfaces of window and door frames, as well as similar products with painted and integral finishes from mortar droppings. Cold Weather Construction: Comply with referenced unit masonry standard for cold weather construction and the following: Do not lay masonry units that are wet or frozen. Remove masonry damaged by freezing conditions. Hot-Weather Requirements: Comply with hot-weather construction requirements contained in TMS602/ACI530.1/ASCE6. PRODUCTS GENERAL Materials shall meet or exceed all applicable referenced standards, federal, state and local requirements, and conform to codes and ordinances of authorities having jurisdiction. Comply with referenced unit masonry standard and other requirements specified in this Section applicable to each material indicated. Masonry Standard: Comply with TMS602/ACI530.1/ASCE6, except as modified by requirements in the Contract Documents. Defective Units: Referenced masonry unit standards may allow a certain percentage of units to contain chips, cracks, or other defects exceeding limits stated. Do not use units where such defects are exposed in the completed Work[and will be within 20 feet (6m) vertically and horizontally of a walking surface]. DELETE PARAGRAPH AND SUBPARAGRAPHS BELOW IF NO FIRE RATED MASONRY CONSTRUCTION. Fire-Resistance Ratings: Comply with requirements for fire-resistance-rated assembly designs indicated. Where fire-resistance-rated construction is indicated, units shall be listed and labeled by a qualified testing agency acceptable to authorities having jurisdiction. MANUFACTURERS Source Limitations for Masonry Units: Obtain exposed masonry units of a uniform texture and color, or a uniform bland within the ranges accepted for these characteristics, from single source from single manufacturer for each product required. Source Limitations for Mortar Materials: Obtain mortar ingredients of a uniform quality, including color for exposed masonry, from single manufacturer for each cementitious component and from single source or producer for each aggregate. BRICK UNITS Comply with the following requirements applicable to each form of brick required: Provide special molded shapes where indicated and as follows: For applications requiring brick of form, color, texture, and size on exposed surfaces that cannot be produced by sawing standard brick sizes. For applications where stretcher units cannot accommodate special conditions including those at corners, movement joints, bond beams, sashes, and lintels. Provide units without cores or frogs and with all exposed surfaces finished for ends of sills, caps, and similar applications that expose brick surfaces that otherwise would be concealed from view. Face Brick Standard: ASTM C 216 and as follows: Grade and Unit Compressive Strength: Provide units of grade SW and minimum average net area compressive strength not less than the unit compressive strengths required to produce clay masonry construction of compressive strength indicated. Type FBS (for general use in exposed masonry requiring wider variations in size and color ranges than Type FBX). Type FBX (for general use in exposed masonry requiring minimum variations in size and color ranges). Type FBA (for special architectural effects resulting from non-uniformity in size, color, and texture of individual units). Provide bricks manufactured to the dimensions within the tolerances specified in ASTM C 216 for Standard Modular Brick; 3-5/8 inches thick by 2-1/4 inches high by 7-5/8 inches long. Application: Use where brick is exposed, unless otherwise indicated. Wherever shown to "match existing," provide face brick of matching color, texture, and size as existing adjacent brickwork. Color and Texture: Match Architect's sample. CONCRETE MASONRY UNITS Comply with requirements indicated below applicable to each form of concrete masonry unit required. Provide special shapes where indicated and as follows: For lintels, corners, jambs, sash, control joints, headers, bonding, and other special conditions. Bullnose units for outside corners unless otherwise indicated. Square edged units for outside corners, except where indicated as bullnose. Integral Water Repellent: Provide units made with integral water repellent [for exposed units] [and] [where indicated]. Integral Water Repellent: Liquid polymeric, integral water-repellent admixture that does not reduce flexural bond strength. Units made with integral water repellent, when tested according to ASTME514/E514M as a wall assembly made with mortar containing integral water-repellent manufacturer's mortar additive, with test period extended to 24 hours, shall show no visible water or leaks on the back of test specimen.  HYPERLINK "http://www.specagent.com/Lookup?ulid=9954" Products: Subject to compliance with requirements, provide products by one of the following: BASF Corporation; Construction Systems; MasterPel. Euclid Chemical Company (The); an RPM company; Eucon Blocktite. GCP Applied Technologies Inc. (formerly Grace Construction Products); Dry-Block. CMUs: ASTMC90. Unit Compressive Strength: Provide units with minimum average net-area compressive strength of 2150 psi (14.8 MPa). RETAIN ONE OF FIRST THREE OPTIONS IN "DENSITY CLASSIFICATION" SUBPARAGRAPH BELOW, OR DELETE SUBPARAGRAPH FOR CONTRACTOR'S OPTION. RETAIN LAST OPTION BELOW FOR DEFAULT REQUIREMENT IF USING MORE THAN ONE WEIGHT. SEE THE EVALUATIONS. Density Classification: [Lightweight] [Medium weight] [Normal weight][unless otherwise indicated]. Size (Width): Manufactured to dimensions 3/8 inch (10 mm) less than nominal dimensions. RETAIN "EXPOSED FACES" SUBPARAGRAPH BELOW IF COLOR AND TEXTURE OF FACES ARE CRITICAL. ASTMC90 REQUIRES AT LEAST FOUR UNITS FOR SAMPLE, REPRESENTING THE RANGE OF COLOR AND TEXTURE PERMITTED. Exposed Faces: Provide color and texture matching the range represented by Architect's sample. Faces to Receive Plaster: Where units are indicated to receive a direct application of plaster, provide textured-face units made with gap-graded aggregates. Size: Provide concrete masonry units complying with requirements indicated below for size that are manufactured to specified face dimensions within tolerances specified in the applicable referenced ASTM specification for concrete masonry units. Concrete Masonry Units: Manufactured to specified dimensions of 3/8 inch less than nominal widths by nominal heights by nominal lengths indicated on drawings. Prefaced Concrete Masonry Units: Manufactured to specified dimensions of 3/8 inch less than nominal widths by nominal heights by nominal lengths indicated on drawings, with prefaced surfaces having 1/16 inch thick returns of facing to create 1/4 inch wide mortar joints with modular coursing. Provide Type I, moisture controlled units. Exposed Faces: Manufacturer's standard color and texture, unless otherwise indicated. Decorative CMUs: ASTM C 90. Unit Compressive Strength: Provide units with minimum average net-area compressive strength of 2150 psi (14.8 MPa). Density Classification: [Lightweight] [Medium weight] [Normal weight]. Size (Width): Manufactured to dimensions specified in "CMUs" Paragraph. Pattern and Texture:Where special finishes are indicated, provide units with exposed faces of the following general description matching color and texture of Architect's sample. Standard aggregate, ground face finish Special aggregate, ground face finish Standard aggregate, split face finish Special aggregate, split face finish Standard aggregate, split ribbed finish Special aggregate, split ribbed finish Where special patterns are indicated, provide units with exposed faces matching color, texture and pattern of Architect's sample. Hollow Load Bearing Concrete Masonry Units: ASTM C 90, and as follows: Unit Compressive Strength: Provide units with minimum average net area compressive strength not less than the unit compressive strengths required to produce concrete unit masonry construction of compressive strength indicated. Weight Classification: Lightweight unless otherwise indicated or required by Project conditions. Solid Load Bearing Concrete Masonry Units: ASTM C 90, and as follows: Unit Compressive Strength: Provide units with minimum average net area compressive strength not less than the unit compressive strengths required to produce concrete unit masonry construction of compressive strength indicated. Weight Classification: Lightweight unless otherwise indicated or required by Project conditions. Prefaced Concrete Block: Lightweight concrete units indicated below with manufacturer's standard smooth resinous tile facing complying with ASTM C 744: For units on which prefaced surfaces are molded, comply with the following: Hollow Load Bearing Concrete Block: ASTM C 90 Unit Compressive Strength: Provide units with minimum average net area compressive strength not less than the unit compressive strengths required to produce concrete unit masonry construction of compressive strength indicated. Color and Pattern: Match Architect's sample MORTAR AND GROUT MATERIALS 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 required mortar color. Alkali content shall not be more than 0.1 percent when tested according to ASTM C 114. Mortar Cement: U.B.C. Standard No. 21-14 For pigmented mortars, use premixed, colored mortar cements of formulation required to produce color indicated, or if not indicated, as selected from manufacturer's standard formulations. Pigments shall not exceed 5 percent of mortar cement by weight for mineral oxides nor 1 percent for carbon black. Ready Mixed Mortar: Cementitious materials, water, and aggregate complying with requirements specified in this article, combined with set controlling admixtures to produce a ready mixed mortar complying with ASTM C 1142. Hydrated Lime: ASTM C 207, Type S Aggregate for Mortar: ASTM C 144, except for joints less than 1/4 inch use aggregate graded with 100 percent passing the No. 16 sieve. White Mortar Aggregates: Natural white sand or ground white stone Colored Mortar Aggregates: Ground marble, granite, or other sound stone, as required to match Architect's sample. Aggregate for Grout: ASTM C 404 Colored Mortar Pigments: Natural and synthetic iron oxides and chromium oxides, compounded for use in mortar mixes. Use only pigments with record of satisfactory performance in masonry mortars. Water: Clean and potable REINFORCING STEEL Provide reinforcing steel complying with requirements of referenced unit masonry standard and this article. Steel Reinforcing Bars: Material and grade as follows: Billet steel complying with ASTM A 615 Epoxy coated billet steel complying with ASTM A 615 and ASTM A 775 Grade 60 Deformed Reinforcing Wire: ASTM A 496 Plain Welded Wire Fabric: ASTM A 185 Deformed Welded Wire Fabric: ASTM A 497 JOINT REINFORCEMENT Provide joint reinforcement complying with requirements of referenced unit masonry standard and this article, formed from galvanized carbon steel wire, coating class as required by referenced unit masonry standard for application indicated. Description: Welded wire units prefabricated with deformed continuous side rods and plain cross rods into straight lengths of not less than 10 feet, with prefabricated corner and tee units, and complying with requirements indicated below: Wire Diameter for Side Rods: 0.1483 inch (9 gage) Wire Diameter for Cross Rods: 0.1483 inch (9 gage) For single wythe masonry provide type as follows with single pair of side rods: Ladder design with perpendicular cross rods spaced not more than 16 inches on center. Truss design with continuous diagonal cross rods spaced not more than 16 inches on center. For multiwythe masonry provide type as follows: Tab design with single pair of side rods and rectangular box type cross ties spaced not more than 16 inches on center; with side rods spaced for embedment within each face shell of backup wythe and ties extended to engage the outer wythe by at least 1 inches. Acceptable products include Masonry Reinforcing Corp. "Series 800", Dur O waL "Ladur-Eye", or Hohman & Barnard "Hookit with 2Z Ties". TIES AND ANCHORS, GENERAL Provide ties and anchors specified in subsequent articles that comply with requirements for metal and size of referenced unit masonry standard and of this article. Galvanized Carbon Steel Wire: ASTM A 82, coating class as required by referenced unit masonry standard for application indicated. Galvanized Steel Sheet: ASTM A 366 (commercial quality) cold rolled carbon steel sheet, hot dip galvanized after fabrication to comply with ASTM A 525, Class B2 (for unit lengths over 15 inches) and Class B3 (for unit lengths under 15 inches), for sheet metal ties and anchors. ADJUSTABLE ANCHORS FOR CONNECTING MASONRY TO STRUCTURAL FRAMEWORK Two piece assemblies as described below allowing vertical or horizontal differential movement between wall and framework parallel to plane of wall, but resisting tension and compression forces perpendicular to it. For anchorage to concrete framework, provide manufacturer's standard with dovetail anchor section formed from sheet metal and triangular shaped wire tie section sized to extend within 1 inch of masonry face and as follows: Furnish dovetail slots to concrete trade for installation. Acceptable products include Masonry Reinforcing Corp. "1304/2102", Dur O waL "D/A100/D/A720 723", or Heckman "100/103". For anchorage to steel framework provide manufacturer's standard anchors with crimped 1/4 inch diameter wire anchor section for welding to steel and triangular shaped wire tie section sized to extend within 1 inch of masonry face and as follows: Acceptable products include Masonry Reinforcing Corp. "1000, Type 1/1100", Dur O waL "D/A100/D/A720 723", or Heckman "100/103". RIGID ANCHORS Rigid Anchors: Fabricate from steel bars 1-1/2 inches (38 mm) wide by 1/4 inch (6.35 mm) thick by 24 inches (610 mm) long, with ends turned up 2 inches (51 mm) or with cross pins unless otherwise indicated. Corrosion Protection: Hot-dip galvanized to comply with ASTMA153/A153M. ADJUSTABLE MASONRY VENEER ANCHORS Provide two piece assemblies allowing vertical or horizontal differential movement between wall and framework parallel to plane of wall, but resisting tension and compression forces perpendicular to it; for attachment over sheathing to metal studs; and with the following structural performance characteristics: Structural Performance Characteristics: Capable of withstanding a 100 pound/foot load in either tension or compression without deforming over, or developing play in excess of, 0.05 inch. Provide anchors and ties as specified below with all components hot-dipped galvanized after fabrication. Size ties to extend to within inch of outside face of brick veneer. Brick Veneer Anchors at Metal Stud Back Up Construction: Flexible two piece anchors consisting of 3/16 inch diameter trapezoidal shaped wire ties and 16 gage minimum steel strap designed for screw attachment into metal stud framing. Acceptable products include Hohman & Barnard "DW 10/VWT", Masonry Reinforcing Corp. "1004/1100", or Dur O WaL "D/A213-.5/D/A701 708". Brick Veneer Anchors at Solid Back Up Construction: Flexible two piece anchors consisting of 3/16 inch diameter trapezoidal shaped wire ties with 16 gage channel locking tab and 16 gage minimum steel "channel slot" designed for surface attachment to concrete or CMU back up. Acceptable products include Masonry Reinforcing Corp. "1302/2103", Dur O WaL "D/A901/918 921", or Heckman "132/129". Steel Drill Screws for Steel Studs: ASTM C 954 except manufactured with hex washer head and neoprene washer, #10 diameter by length required to penetrate steel stud flange by not less than 3 exposed threads, and with the following corrosion protective coating: Organic polymer coating with salt spray resistance to red rust of more than 800 hours per ASTM B 117. Organic Polymer Coated Steel Drill Screws: "Traxx," ITW Buildex "Dril Flex," Elco Industries, Inc. MISCELLANEOUS ANCHORS Unit Type Masonry Inserts in Concrete: Cast iron or malleable iron inserts of type and size indicated. Dovetail Slots: Furnish dovetail slots, with filler strips, of slot size indicated, fabricated from 0.0336 inch (22 gage) sheet metal. Anchor Bolts: Steel bolts complying with 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 diameter and length indicated and in the following configurations: Headed bolts. Nonheaded bolts, straight. Nonheaded bolts, bent in manner indicated. POSTINSTALLED ANCHORS Anchors as described below, with capability to sustain, without failure, load imposed within factors of safety indicated, as determined by testing per ASTM E 488, conducted by a qualified independent testing laboratory. Type: Chemical anchors. Type: Expansion anchors. Type: Undercut anchors. 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). Corrosion Protection: Stainless steel components complying with ASTM F 593 and ASTM F 594, Group 1 alloy 304 or 316 for bolts and nuts; alloy 304 or 316 for anchor. For cast in place and postinstalled anchors in concrete: Capability to sustain, without failure, a load equal to 4 times loads imposed by masonry. For postinstalled anchors in grouted concrete masonry units: Capability to sustain, without failure, a load equal to 6 times loads imposed by masonry. EMBEDDED THROUGH-WALL FLASHING MATERIALS Copper Fabric Laminate: 5 ounce copper sheet bonded with asphalt between 2 layers of glass fiber cloth. "Copper Fabric," Afco Products Inc. "Type FCC Fabric Covered Copper," Phoenix Building Products "Copper Fabric Flashing," Sandell Manufacturing Co., Inc. "York Copper Fabric Flashing," York Manufacturing, Inc. Adhesive for Flashings: Of type recommended by manufacturer of flashing material for use indicated. MISCELLANEOUS MASONRY ACCESSORIES Expansion and Control Joint Fillers: Premolded Expansion Joint Filler: Closed cell polyethylene foam material with a density of 2 psf, and compatible with most sealants. Acceptable products include Sonneborn "Sonoflex F" and Williams Products Inc. "Expand O Foam 1380 Series". Construction Joint Filler: Closed cell expanded neoprene foam material with a density of 15 to 35 psf, flame resistant, and compatible with most sealants. Acceptable products include Williams Products Inc. "Neoprene Type NN1" and Rubatex Corp. "R 1800 FS". Premolded Control Joint Strip: Solid rubber strips with a Shore A durometer hardness of 60 to 80, designed to fit standard sash blocks and maintain lateral stability of masonry wall. Provide strips in width approximately 2" less than thickness of masonry wythe. Acceptable products include Dur O waL "Rapid Control Joint" and Hohman & Barnard "QS Series". Bond Breaker Strips: Asphalt saturated organic roofing felt complying with ASTM D 226, Type I (No. 15 asphalt felt). Weep Holes: Provide one of the following at Contractor's option: Aluminum Weep Hole/Vent: One piece L shaped units made to fit in a vertical mortar joint from sheet aluminum and consisting of a vertical channel with louvers stamped in web and a flat horizontal; prepainted prior to installation, in color to match that of masonry or mortar as selected by Architect. "Louvered Weephole", Masonry Reinforcing Corp. Plastic Weep Hole/Vent: One piece flexible extrusion manufactured from ultraviolet resistant polypropylene co polymer, designed to weep moisture in masonry cavity to exterior, sized to fill head joints with outside face held back 1/8 inch from exterior face of masonry, in custom color to match that of masonry or mortar as selected by Architect. "Cell Vent," Dur O Wal, Inc. Cavity Drainage Material: To prevent mortar from blocking cavity weep holes, provide one of the following: 1-inch-(25-mm-) thick, reticulated, nonabsorbent mesh, made from polyethylene strands and shaped to maintain drainage at weep holes without being clogged by mortar droppings. Product: "Mortar Net". MASONRY CLEANERS 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. Products: Subject to compliance with requirements, provide products by one of the following: Diedrich Technologies, Inc.; a division of Sandell Construction Solutions; 202 New Masonry Detergent. EaCo Chem, Inc.; NMD 80. PROSOCO, Inc.; Sure Klean 600. MORTAR AND GROUT MIXES Do not add admixtures including coloring pigments, air entraining agents, accelerators, retarders, water repellent agents, antifreeze compounds, or other admixtures, unless otherwise indicated. Do not use calcium chloride in mortar or grout. Use portland cement-lime mortar unless otherwise indicated. Add cold-weather admixture (if used) at same rate for all mortar that will be exposed to view, regardless of weather conditions, to ensure that mortar color is consistent. Mortar for Unit Masonry: Comply with ASTM C 270, Proportion Specification, for types of mortar indicated below: For masonry below grade or in contact with earth, use TypeM. For reinforced masonry, use TypeN. For exterior, above-grade, load-bearing and nonload-bearing walls and parapet walls; for interior load-bearing walls; for interior nonload-bearing partitions; and for other applications where another type is not indicated, use TypeN. For interior nonload-bearing partitions, TypeO may be used instead of TypeN. Colored Pigmented Mortar: Select and proportion pigments with other ingredients to produce color required. Do not exceed pigment to-cement ratio of 1:10, by weight. Match Architect's sample. Grout for Unit Masonry: Comply with ASTMC476. Provide grout complying with ASTM C 476, of consistency indicated or, if not otherwise indicated, of consistency (fine or coarse) at time of placement which will completely fill all spaces intended to receive grout. Provide grout in the following proportions, by volume: (1 part portland cement):(0 to 1/10 part hydrated lime or lime putty):(aggregate, 2 to 3 times the sum of the volumes of other cementitious materials). Add coarse aggregate in the proportion of 1 to 2 times the sum of the volumes of other cementitious materials for "coarse" grout. Use fine grout in grout spaces less than 2 inches in horizontal direction, unless otherwise indicated. Use coarse grout in grout spaces 2 inches or more in least horizontal dimension, unless otherwise indicated. EXECUTION EXAMINATION Examine conditions, with Installer present, for compliance with requirements for installation tolerances and other specific conditions, and other conditions affecting performance of unit masonry. For the record, prepare written report, endorsed by Installer, listing conditions detrimental to performance of unit masonry. Verify that foundations are within tolerances specified. Verify that reinforcing dowels are properly placed. Verify that substrates are free of substances that impair mortar bond. Examine rough in and built in construction to verify actual locations of piping connections prior to installation. Do not proceed until unsatisfactory conditions have been corrected. INSTALLATION Installation shall meet or exceed all applicable federal, state and local requirements, referenced standards and conform to codes and ordinances of authorities having jurisdiction. Installation shall be in accordance with manufacturers published recommendations. Comply with referenced unit masonry standard and other requirements indicated applicable to each type of installation included in Project. Thickness: Build cavity and composite walls and other masonry construction to the full thickness shown. Build single wythe walls to the actual thickness of the masonry units, using units of nominal thickness indicated. Build chases and recesses as shown or required to accommodate items specified in this and other Sections of the Specifications. Provide not less than 8 inches of masonry between chase or recess and jamb of openings and between adjacent chases and recesses. Leave openings for equipment to be installed before completion of masonry. After installation of equipment, complete masonry to match construction immediately adjacent to the opening. Cut masonry units with motor driven saws to provide clean, sharp, unchipped edges. Cut units as required to provide continuous pattern and to fit adjoining construction. Use full size units without cutting where possible. 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. Select and arrange units for exposed unit masonry to produce a uniform blend of colors and textures. Mix units from several pallets or cubes as they are placed. Matching Existing Masonry: Match coursing, bonding, color, and texture of new masonry with existing masonry. TOLERANCES Dimensions and Locations of Elements: For dimensions in cross section or elevation, do not vary by more than plus 1/2 inch (12 mm) or minus 1/4 inch (6 mm). For location of elements in plan, do not vary from that indicated by more than plus or minus 1/2 inch (12 mm). For location of elements in elevation, do not vary from that indicated by more than plus or minus 1/4 inch (6 mm) in a story height or 1/2 inch (12 mm) total. Lines and Levels: For bed joints and top surfaces of bearing walls, do not vary from level by more than 1/4 inch in 10 feet (6 mm in 3 m), or 1/2-inch (12-mm) maximum. 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 (3 mm in 3 m), 1/4 inch in 20 feet (6 mm in 6 m), or 1/2-inch (12-mm) maximum. For vertical lines and surfaces, do not vary from plumb by more than 1/4 inch in 10 feet (6 mm in 3 m), 3/8 inch in 20 feet (9 mm in 6 m), or 1/2-inch (12-mm) maximum. 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 (3 mm in 3 m), 1/4 inch in 20 feet (6 mm in 6 m), or 1/2-inch (12-mm) maximum. For lines and surfaces, do not vary from straight by more than 1/4 inch in 10 feet (6 mm in 3 m), 3/8 inch in 20 feet (9 mm in 6 m), or 1/2-inch (12-mm) maximum. For vertical alignment of exposed head joints, do not vary from plumb by more than 1/4 inch in 10 feet (6 mm in 3 m), or 1/2-inch (12-mm) maximum. For faces of adjacent exposed masonry units, do not vary from flush alignment by more than 1/16 inch (1.5 mm) except due to warpage of masonry units within tolerances specified for warpage of units. Joints: 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). For exposed bed joints, do not vary from bed-joint thickness of adjacent courses by more than 1/8 inch (3 mm). 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). For exposed head joints, do not vary from thickness indicated by more than plus or minus 1/8 inch (3 mm).[Do not vary from adjacent bed-joint and head-joint thicknesses by more than 1/8 inch (3 mm).] For exposed bed joints and head joints of stacked bond, do not vary from a straight line by more than 1/16 inch (1.5 mm) from one masonry unit to the next. LAYING MASONRY WALLS Lay out walls in advance for accurate spacing of surface bond patterns with uniform joint widths and for accurate locating of openings, movement type joints, returns, and offsets. Avoid the use of less than half size units at corners, jambs, and where possible at other locations. Lay up walls to comply with specified construction tolerances, with courses accurately spaced and coordinated with other construction. Bond Pattern for Exposed Masonry: Lay exposed masonry in the following bond pattern; do not use units with less that nominal 4 inch horizontal face dimensions at corners or jambs. One half running bond with vertical joint in each course centered on units in courses above and below. Stack bond One third running bond As indicated on drawings 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. Stopping and Resuming Work: In each course, rack back 1/2 unit length for one half running bond or 1/3 unit length for one third running bond; do not tooth. Clean exposed surfaces of set masonry, wet clay masonry units lightly (if required), and remove loose masonry units and mortar prior to laying fresh masonry. Built In Work: As construction progresses, build in items specified under this and other Sections of the Specifications. Fill in solidly with masonry around built in items. Fill space between hollow metal frames and masonry solidly with mortar, unless otherwise indicated. At exterior frames insert extruded polystyrene board insulation around perimeter of frame in thickness indicated but not less than inch to act as a thermal break between frame and masonry. Where built in items are to be embedded in cores of hollow masonry units, place a layer of metal lath in the joint below and rod mortar or grout into core. Fill cores in hollow concrete masonry units with grout 3 courses (24 inches) under bearing plates, beams, lintels, posts, and similar items, unless otherwise indicated. MORTAR BEDDING AND JOINTING Lay brick units with full mortar coverage on bed and head joints. Furrowing of joints will not be permitted. Lay hollow concrete masonry units as follows: With full mortar coverage on horizontal and vertical face shells. 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. For starting course on footings where cells are not grouted, spread out full mortar bed including areas under cells. Cut joints flush for masonry walls to be concealed or to be covered by other materials, unless otherwise indicated. STRUCTURAL BONDING OF MULTIWYTHE MASONRY Use individual metal ties installed in horizontal joints to bond wythes together. Use continuous horizontal joint reinforcement installed in horizontal mortar joints for bond tie between wythes. Use either of the structural bonding systems specified above. Use structural bonding system indicated on Drawings. Corners: Provide interlocking masonry unit bond in each course at corners, unless otherwise shown. Provide continuity with horizontal joint reinforcement at corners using prefabricated "L" units, in addition to masonry bonding. Intersecting and Abutting Walls: Unless vertical expansion or control joints are shown at juncture, provide same type of bonding specified for structural bonding between wythes and space as follows: Provide individual metal ties. Provide continuity with horizontal joint reinforcement using prefabricated "T" units. Nonbearing Interior Partitions: Build full height of story to underside of solid floor or roof structure above and as follows: Install pressure relieving joint filler in joint between top of partition and underside of structure above. CAVITIES/AIR SPACES Keep cavities/air spaces clean of mortar droppings and other materials during construction. Strike joints facing cavities/air spaces flush. Tie exterior wythe to backup with individual metal ties. Stagger alternate courses. Tie exterior wythe to backup with continuous horizontal joint reinforcing. Install vents in vertical head joints at the top of each continuous cavity/air space. Space vents and close off cavities/air spaces vertically and horizontally with blocking in manner indicated. CAVITY WALL AND MASONRY CELL INSULATION On units of plastic insulation, install small pads of adhesive spaced approximately 1' 0" on center both ways on inside face or attach to inside face with plastic fasteners designed for this purpose. Fit courses of insulation between wall ties and other confining obstructions in cavity, with edges butted tightly both ways. Press units firmly against inside wythe of masonry or other construction as shown. Fill all cracks and open gaps in insulation with crack sealer compatible with insulation and masonry. Pour granular insulation into cavities as shown to fill void spaces completely. Maintain inspection ports to show presence of insulation at extremities of each pour area. Close ports after complete coverage has been confirmed. Limit fall of insulation to one story in height, but not to exceed 20 feet. HORIZONTAL JOINT REINFORCEMENT Provide continuous horizontal joint reinforcement as indicated. Install longitudinal side rods in mortar for their entire length with a minimum cover of 5/8 inch on exterior side of walls, 1/2 inch elsewhere. Lap reinforcing a minimum of 6 inches. Cut or interrupt joint reinforcement at control and expansion joints, unless otherwise indicated. Provide continuity at corners and wall intersections by use of prefabricated "L" and "T" sections. Cut and bend reinforcement units as directed by manufacturer for continuity at returns, offsets, column fireproofing, pipe enclosures, and other special conditions. ANCHORING MASONRY TO STRUCTURAL MEMBERS Anchor masonry to structural members where masonry abuts or faces structural members to comply with the following: 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 or other rigid materials. Anchor masonry to structural members with flexible anchors embedded in masonry joints and attached to structure. Space anchors as indicated, but not more than 24 inches on center vertically and 36 inches on center horizontally. ANCHORING SINGLE WYTHE MASONRY VENEER Anchor single wythe masonry veneer to metal studs with masonry veneer anchors to comply with the following requirements: Fasten each anchor section through sheathing to metal studs with 2 metal fasteners of type indicated. Embed tie section in masonry joints. Provide not less than 2 inch air space between back of masonry veneer wythe and face of sheathing. Locate anchor section relative to course in which tie section is embedded to allow maximum vertical differential movement of tie up and down. Space anchors as indicated but not more than 16 inches on center vertically and 18 inches on center horizontally with not less than one anchor for each 3 square feet of wall area. Install additional anchors within 12 inches of openings and at intervals around perimeter not exceeding 8 inches. Install vents at the top of each continuous air space in masonry veneer walls. MOVEMENT (CONTROL AND EXPANSION) JOINTS Install control and expansion joints in unit masonry where indicated. Build in related items as the masonry progresses. Do not form a continuous span through movement joints unless provisions are made to prevent in plane restraint of wall or partition movement. Joint Spacing: If location of control joints and expansion joints is not shown, place vertical joints spaced not to exceed 35 feet on center and horizontal joints not to exceed story height. Locate control joints in face brick at all points of discontinuity of back up construction, vertical and horizontal. Form control joints in concrete masonry as follows: Fit bond breaker strips into hollow contour in ends of block units on one side of control joint. Fill the resultant core with grout and rake joints in exposed faces. Install preformed control joint gaskets designed to fit standard sash block. Install special shapes designed for control joints. Install bond breaker strips at joint. Keep head joints free and clear of mortar or rake joint. Form expansion joints in brick made from clay or shale as follows: Build flanges of metal expansion strips into masonry. Lap each joint 4 inches in direction of water flow. Seal joints below grade and at junctures with horizontal expansion joints, if any. Build flanges of factory fabricated expansion joint units into masonry. Build in joint fillers where indicated. Form open joint of width indicated but not less than 3/8 inch for installation of sealant and backer rod. Maintain joint free and clear of mortar. Build in horizontal pressure relieving joints where indicated; construct joints by either leaving an air space or inserting nonmetallic 50 percent compressible joint filler of width required to permit installation of sealant and backer rod. Locate horizontal pressure relieving joints beneath shelf angles supporting masonry veneer and attached to structure behind masonry veneer. LINTELS Install steel lintels where indicated. Provide masonry lintels where shown and wherever 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. Provide precast or formed in place masonry lintels. Cure precast lintels before handling and installation. Temporarily support formed in place lintels. For hollow concrete masonry unit walls, use specially formed bond beam units with reinforcement bars placed as indicated and filled with coarse grout. Provide minimum bearing of 8 inches at each jamb, unless otherwise indicated. THROUGH-WALL FLASHING/WEEP HOLES Install embedded flashing and weep holes in masonry at shelf angles, lintels, ledges, other obstructions to the downward flow of water in the wall, and where indicated. Prepare masonry surfaces so that they are smooth and free from projections that could puncture flashing. Place through wall flashing on sloping bed of mortar and cover with mortar. Seal penetrations in flashing with adhesive/sealant/tape as recommended by flashing manufacturer before covering with mortar. Install flashings as follows: At masonry backup construction, extend flashing from exterior face of outer wythe of masonry, through the outer wythe, turned up a minimum of 8 inches, and through the inner wythe to within inch of the interior face of the wall in exposed masonry. Where interior surface of inner wythe is concealed by furring, carry flashing completely through the inner wythe and turn up approximately 2 inches, unless otherwise indicated. At sheathing backup construction, extend flashing from exterior face of outer wythe of masonry, through the outer wythe to the face of the sheathing, and turn up a minimum of 8 inches onto the sheathing. Fully adhere flashing to substrate with adhesive; using a roller or other device to ensure full and complete adhesion. At joints, lap flashing sheets a minimum of 4 inches onto adjacent sheet and seal with adhesive. At lintels and shelf angles, extend flashing a minimum of 4 inches into masonry at each end. At heads and sills, extend flashing as specified above unless otherwise indicated but turn up ends not less than 2 inches to form a pan. Turn down sheet metal flashings at exterior face of masonry to form drip. Strip in top edge of flashing installed against inner face of cavity with mastic and reinforcing fabric. Install weep holes in the head joints in exterior wythes of the first course of masonry immediately above embedded flashings and as follows: Form weep holes by using open head-joints in brick veneer. Form weep holes with product specified in Part 2 of this Section. Space weep holes 24 inches on center. In uninsulated cavities/air spaces place cavity drainage material immediately above flashing embedded in the wall, as masonry construction progresses, to splatter mortar droppings and to maintain drainage. Install reglets and nailers for flashing and other related construction where shown to be built into masonry. INSTALLATION OF REINFORCED UNIT MASONRY Install reinforced unit masonry to comply with requirements of referenced unit masonry standard. Provide continuous vertical reinforcing as indicated on the Drawings or otherwise required, including additional reinforcing bars at corners, around openings, at attachments of other work, and similar work. Install bars to provide proper embedment and laps where indicated as "continuous reinforcing". Fill cores containing vertical reinforcing with grout to full height of wall. Temporary Formwork: Construct formwork and shores to support reinforced masonry elements during construction. Construct formwork to conform to shape, line, and dimensions shown. Make 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. Do not place grout until entire height of masonry to be grouted has attained sufficient strength to resist grout pressure. 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. REPAIRING, POINTING, AND CLEANING Remove and replace masonry units that are loose, chipped, broken, stained, or otherwise damaged or if units do not match adjoining units. Install new units to match adjoining units and in fresh mortar or grout, pointed to eliminate evidence of replacement. Pointing: During the tooling of joints, enlarge any voids or holes, except weep holes, and completely fill with mortar. Point up all joints including corners, openings, and adjacent construction to provide a neat, uniform appearance, prepared for application of sealants. Final Cleaning: After mortar is thoroughly set and cured, clean exposed masonry as follows: Remove large mortar particles by hand with wooden paddles and nonmetallic scrape hoes or chisels. Test cleaning methods on sample wall panel; leave panel uncleaned for comparison purposes. Obtain Architect's approval of sample cleaning before proceeding with cleaning of masonry. Protect adjacent stone and nonmasonry surfaces from contact with cleaner by covering them with liquid strippable masking agent, polyethylene film, or waterproof masking tape. Wet wall surfaces with water prior to application of cleaners; remove cleaners promptly by rinsing thoroughly with clear water. Clean brick by means of bucket and brush hand cleaning method described in BIA "Technical Note No. 20 Revised". Clean concrete masonry by means of cleaning method indicated in NCMA TEK 45 applicable to type of stain present on exposed surfaces. Provide final protection and maintain conditions, in a manner acceptable to Installer, that ensure unit masonry is without damage and deterioration at time of Substantial Completion. END OF SECTION 04 20 00 FOR MDACC USE ONLY. DELETE THIS PAGE BEFORE ISSUING DOCUMENTS. document revision history IssueDateRevision DescriptionAuthor20190301Original IssuanceRev. 1.Rev. 2Rev. 3 Rev. 4 Rev. 5    MD ANDERSON Project No. XXXXXXMD ANDERSON PROJECT NAMEA/E Name Issue Description A/E Project No.Month 00, 0000 鶹ӳ unit masonry MD Anderson Cancer Center04 20 00 MS 20190301 PAGE 25 of  NUMPAGES 25 78   l m  Xadgj{9./hx h%,Lhh hh 5hh hh$r5 h%,Lh$r h%,Lh h$r5h$r hu!hu!hu!hs h$Jh$Jh$JhShP h!YNH h!Y@h!Y hqh!Y hqh8&8 ( ; P V i  ! m  gd@8gd@8gd$rgd$rgd/pgd/p n (6AW*9cCgdh gd@8gd$rgd@8gd@8gdZ }gd) G!/[#o5#f gd@8gd) gd$rgd$rgdZ }gdh gdh f ##&&U(((()*l+++++++,,//33444444X7777777s9t9999999ྲྀझjh uhiU h uhijh uhiU h@8hi h%,Lhi h%,Lh hi0J+5h::::;;<<<=>>?I@oAAABBBgdrxgd@8gd@8gd) gdZ }gdigdigdigd@89 ::?;G;R;T;:<;<<<<<<==>A&CCCD DFF4H;H*B*ph hnWhi2BCCCD7D\DDD-EuEYFFGGHHH-I\I@JmJJEKKKLgd@8gd$rgd) gd$rgdoygd@8gdrxLMM~NN4OUOP3PEPPPQTQ^QQQQQRSS/TTT1UaUfVgd@8gd$rgd) gd$rfVVWW-XDYY\Z;[v[[\d]r]A^^^_`Sa=bbcLdReeegdyLgdyLgd) gd$rgd$rgd@8]]]^ ^^?^X^^^.`8`+a1aaa%c*c!h"h*B*ph hp3zhqaQhqaQhJ8+hPh hyL hp3zhyLhp3zhyL0J+hp3zhyL0J,Aeef1ff!gh#h>ھپiij"H'?ggd$rgd$rgd) ޱOCصڶ#L߷и\dԻӽigd@8gd) gd$rgd$rA'qg FnK.#Jgd$rgd$rgd) gd@8! 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