SECTION UNIT MASONRY

Transcription

1 PRT1 GENERL 1.01 SECTION INCLUDES. Concrete Block. B. Clay Facing Brick. SECTION C. Ceramic Glazed Structural Clay Facing Tile. D. Stone mantel at fire place. E. Mortar and Grout. F. Reinforcement and nchorage. G. Flashings. H. ccessories DMINISTRTIVE REQUIREMENTS. Preinstallation Meeting: Convene a preinstallation meeting one week before starting work of this section; require attendance by all relevant installers SUBMITTLS. See Section dministrative Requirements, for submittal procedures. B. Product Data: Provide data for masonry units, fabricated wire reinforcement, mortar, and masonry accessories. C. Samples: Submit four samples of facing brick units to illustrate color, texture, and extremes of color range. D. Manufacturer's Certificate: Certify that masonry units meet or exceed specified requirements. E. Manufacturer's Certificate: Certify that water repellent admixture manufacturer has certified masonry unit manufacturer as an approved user of water repellent admixture in the manufacture of concrete block. F. Test Reports: Concrete masonry manufacturer's test reports for units with integral water repellent admixture. G. Manufacturers Printed Installation Instructions of all products. H. Shop Drawings: Stainless Steel Drip Flashings:Shop Drawings: Indicate material profile, jointing pattern, jointing details, fastening methods, flashings, terminations, and installation details QULITY SSURNCE. Comply with applicable provisions of Masonry Standards Joint Committee, Building Code Requirements and Specifications for Masonry Structures, except where exceeded by the requirements of the Contract Documents. B. Fire Rated ssemblies: Conform to applicable Code for UL ssemblies shown on drawings MOCK-UP. Construct a masonry wall (Brick Veneer with metal stud back up )as a mock-up panel sized 8 feet long by 6 feet high; include metal stud back up specified in Section , Weather Barrier specified in Section , mortar and accessories, structural backup, wall openings, and flashings in mock-up. Coordinate mock- up with all other applicable sections. Leave mockup in place through construction, until instructed by rchitect to remove. B. Locate where directed. C. Mock-up may not remain as part of the Work. PW

2 1.06 WRRNTY. Special warranty: 1. Manufacturer: Warrant flexible flashing material for life of the wall. 2. Begin warranty at Date of Substantial Completion DELIVERY, STORGE, ND HNDLING. Deliver, handle, and store masonry units by means that will prevent mechanical damage and contamination by other materials. B. Handle and store masonry accesories in protective cartons or trays. Do not remove from protective packaging until ready for installation. PRT 2 PRODUCTS 2.01 CONCRETE MSONRY UNITS. Concrete Block: Comply with referenced standards and as follows: 1. Size: Standard units with nominal face dimensions of 16 x 8 inches and nominal depths as indicated on the drawings for specific locations. 2. Special Shapes: Provide non-standard blocks configured for corners, lintels, headers, control joint edges, and other detailed conditions. 3. Concrete Block Units: STM C90, normal weight. a. Hollow block. b. Exposed faces: Manufacturer's standard color and texture BRICK UNITS. Facing Brick: STM C216, Type FBX, Grade SW. 1. Color and texture: Match existing. 2. Nominal size: s indicated on drawings. 3. Special shapes: Molded units as required by conditions indicated, unless standard units can be sawn to produce equivalent effect STONE. Stone Mantel at Fireplace: uxvasse Buff, cut sandblast texture, as supplied by Earth Works Stone ; CLY TILE UNITS. Manufacturers: 1. Elgin Butler Company; Product Structural Glazed Tile: 2. Substitutions: See section Product requirements. B. Ceramic Glazed Structural Clay Facing Tile: STM C126; GradeS (Select); Type I (single-faced units). 1. Color and texture: Match existing. 2. Size: 8W Series, thickness as indicated. 3. Special shapes: Molded units as required by conditions indicated, unless standard units can be sawn without chipping to produce equivalent effect MORTR ND GROUT MTERILS. Masonry Cement: STM C91, Type N for face brick and Type S for concrete block. 1. cceptable product: Mid West Pre- mix. 2. Substitutions: See Section Product Requirements. B. Portland Cement: STM C150, Type I. 1. Low lkali: Not more than 0.60 percent. C. Hydrated Lime: STM C207, TypeS. D. Mortar ggregate: STM C144. E. Grout ggregate: STM C404. F. Water: Clean and potable. PW

3 2.06 REINFORCEMENT ND NCHORGE Manufacturers of Joint Reinforcement and nchors: 1. Blok-Lok Limited: 2. Hohmann & Barnard, Inc (H and B) (including Dur-0-Wal brand): 3. WIRE-BOND: 4. Substitutions: See Section Product Requirements. B. Reinforcing Steel: STM 615/615M Grade 60 (420) deformed billet bars; uncoated. C. Vertical Rebar Positioners: H and B- RB Rebar Positioner and H and B Twin Rebar Positioner. D. Horizontal Rebar Positioner: Our 0 Wal ( Hohmann and Barnard Company); Rebar Positioners D812: E. Rebar Lap- Joint Ties: H and B Spyra- Lox Rebar Lap- Joint ties. F. Joint Reinforcement: Use ladder type joint reinforcement where vertical reinforcement is involved and truss type elsewhere, unless otherwise indicated. G. Single Wythe Joint Reinforcement: Truss or ladder type; STM 82/82M steel wire, hot dip galvanized after fabrication to STM 153/153M, Class B; inch side rods with inch cross rods; width as required to provide not more than 1 inch and not less than 1/2 inch of mortar coverage on each exposure. (H and B 220 Mesh Reinforcement) H. Partition Top nchor: Hand B, PT 420 HS, Hot Dip Galvanized. I. Masonry Veneer nchors: 2-piece anchors that permit differential movement between masonry veneer and structural backup, hot dip galvanized to STM 153/ 153M, Class B. 1. nchor plates: Not less than inch thick, designed for fastening to structural backup through sheathing by two fasteners; provide design with legs that penetrate sheathing and insulation to provide positive anchorage.(h and B X- Seal nchor and Vee- Byna Ties) 2. Wire ties: Triangular shape, inch thick. 3. Vertical adjustment: Not less than 3-1/2 inches. J. Brick Expansion/Control Joint Stabilizers: H and B Slip- Set Stabilizer, type 304 stainless steel FLSHINGS Flexible Flashing: Stainless Steel/Polymer Fabric Flashing; STM 167 stainless steel sheet bonded with rubber-based adhesive to one sheet of polymer fabric. 1. Manufacturer: a. York Manufacturing, Inc; Multi-Flash SS: b. Hohmann & Barnard, Inc; Product Mighty Flash S/ SS Fabric Flashing: c. Substitutions: See Section Product Requirements. B. Stainless Steel Corners and End Dams: Pre- fabricated STM 666,Type 304, 26 Gage. C. Manufacturers: 1. Hohmann and Barnard, Inc; Product Stainless Steel Corners and End Dams. 2. Substitutions: See Section Product Requirements. D. Stainless Steel Drip Plates: Pre- fabricated STM 666,Type 304, 26 Gage, with factory formed hemmed edges. Furnish pre- fabricated drip plate inside and outside corners. E. Manufacturers: 1. Hohmann and Barnard, Inc; Product Standard DP Drip Plate. 2. Substitutions: See Section Product Requirements CCESSORIES Preformed Control- Expansion Joints for Concrete Block: Rubber material. Provide with corner and tee accessories, fused joints. 1. Manufacturers: PW

4 a. Hohmann & Barnard, Inc (including Dur-0-Wal brand); Product RS Series- Rubber Control Joint: b. Substitutions: See Section Product Requirements. B. Joint Filler: Closed cell neoprene; oversized 50 percent to joint width; self expanding; 3 inch wide x by maximum lengths available. 1. Manufacturers: a. Hohmann & Barnard, Inc (including Dur -0-Wal brand); Product NS- Closed Cell Neoprene: b. Substitutions: See Section Product Requirements. C. Cavity Mortar Control: Semi-rigid polyethylene or polyester mesh panels, sized to thickness of wall cavity, and designed to prevent mortar droppings from clogging weeps and cavity vents and allow proper cavity drainage. 1. Mortar Diverter: Panels designed for installation at flashing locations. a. Manufacturers: 1) Mortar Net US, Ltd; Mortar Net with Insect Barrier: 2) Substitutions: See Section Product Requirements. D. Weeps: Polyethylene tubing. 1. Manufacturers: a. Hohmann & Barnard, Inc; Product H- B 341W/S, with stainless steel screen: b. Substitutions: See Section Product Requirements. E. Cavity Weep Vents: Polyethylene. 1. Manufacturers: a. Hohmann & Barnard, Inc; Product H and B QV- Quadro- Vent: b. Substitutions: See Section Product Requirements. F. Cleaning Solution: Non-acidic, not harmful to masonry work or adjacent materials. Use only products and methods approved in writing by the masonry manufacturer for each type of masonry being cleaned LINTELS. Provide masonry lintels where shown and where openings of more than 12 inches for brick size units and 24 inches for block size units without structural steel or other supporting lintels. Reinforce as shown on drawings. B. Steel lintels specified in Section MORTR ND GROUT MIXES. Mortar for Unit Masonry: STM C270, using the Proportion Specification. 1. Masonry below grade and in contact with earth: Type S. 2. Brick masonry: Type N. 3. Concrete block masonry: Type S. B. Grout: STM C476. Consistency required to fill completely volumes indicated for grouting; fine grout for spaces with smallest horizontal dimension of 2 inches or less; coarse grout for spaces with smallest horizontal dimension greater than 2 inches. C. dmixtures: llowed only with rchitects written approval. Provide list of proposed admixtures if any, along with manufactures data sheets and installation instructions. dd to mixture at manufacturer's recommended rate and in accordance with manufacturer's instructions; mix uniformly. D. Mixing: Use mechanical batch mixer and comply with referenced standards. PRT 3 EXECUTION 3.01 EXMINTION. Verify that field conditions are acceptable and are ready to receive masonry. PW

5 B. Verify that related items provided under other sections are properly sized and located. C. Verify that built-in items are in proper location, and ready for roughing into masonry work PREPRTION Direct and coordinate placement of metal anchors supplied for installation under other sections. B. Provide temporary bracing during installation of masonry work. Maintain in place until building structure provides permanent bracing COLD ND HOT WETHER REQUIREMENTS 3.04 COURSING Comply with requirements of Masonry Standards Joint Committee, Building Code Requirements and Specifications for Masonry Structures or applicable building code, whichever is more stringent. Establish lines, levels, and coursing indicated. Protect from displacement. B. Maintain masonry courses to uniform dimension. Form vertical and horizontal joints of uniform thickness. C. Concrete Masonry Units: 1. Bond: Running. 2. Coursing: One unit and one mortar joint to equal 8 inches. 3. Mortar Joints: Concave. D. Brick Units: 1. Bond: Running. 2. Coursing: Three units and three mortar joints to equal 8 inches. 3. Mortar Joints: Concave. E. Clay Tile Units: 3.05 PLCING ND BONDING Lay solid masonry units in full bed of mortar, with full head joints, uniformly jointed with other work. B. Lay hollow masonry units with face shell bedding on head and bed joints. C. Buttering corners of joints or excessive furrowing of mortar joints is not permitted. D. Remove excess mortar and mortar smears as work progresses. E. Interlock intersections and external corners. F. Do not shift or tap masonry units after mortar has achieved initial set. Where adjustment must be made, remove mortar and replace. G. Perform job site cutting of masonry units with proper tools to provide straight, clean, unchipped edges. Prevent broken masonry unit corners or edges. H. Isolate masonry partitions from vertical structural framing members with a control joint as indicated. I. Isolate top joint of masonry partitions from horizontal structural framing members and slabs or decks with compressible joint filler WEEPS/CVITY VENTS Install weep vents in veneer and cavity walls at 24 inches on center horizontally above through-wall flashing, above shelf angles and lintels, at bottom of walls, and where shown on drawings. Leave the side of the masonry units forming the vent space un- buttered and clear of mortar. Install in accordance with manufacturers printed installation instructions CVITY MORTR CONTROL Do not permit mortar to drop or accumulate into cavity air space or to plug weep/cavity vents. PW

6 B. Install cavity mortar diverter at base of cavity and at other flashing locations as recommended by manufacturer to prevent mortar droppings from blocking weep/cavity vents REINFORCEMENT ND NCHORGE -GENERL. Unless otherwise indicated on drawings or specified under specific wall type, install horizontal joint reinforcement 16 inches on center. B. Place masonry joint reinforcement in first horizontal joints above and below openings. Extend minimum 16 inches each side of opening. C. Place continuous joint reinforcement in first joint below top of walls. D. Lap joint reinforcement ends minimum 12 inches REINFORCEMENT ND NCHORGE -SINGLE WYTHE MSONRY. Install horizontal joint reinforcement 16 inches on center. B. Place masonry joint reinforcement in first horizontal joints above and below openings. Extend minimum 16 inches each side of opening. C. Place continuous joint reinforcement in first joint below top of walls. D. Lap joint reinforcement ends minimum 12 inches REINFORCEMENT ND NCHORGE- MSONRY VENEER. Install horizontal joint reinforcement in block at 16 inches on center. B. Place masonry joint reinforcement in first and second horizontal joints above and below openings. Extend minimum 16 inches each side of opening. C. Place continuous joint reinforcement in first and second joint below top of walls. D. Lap joint reinforcement ends minimum 12 inches. E. Stud Back-Up: Secure veneer anchors to stud framed back-up and embed into masonry veneer at maximum 16 inches on center vertically and 24 inches on center horizontally. Place additional anchors at perimeter of openings and ends of panels, so maximum spacing of anchors is 8 inches on center MSONRY FLSHINGS. Whether or not specifically indicated, install masonry flashing to divert water to exterior at all locations where downward flow of water will be interrupted. Install in accordance with manufacturers printed installations and as described below. 1. Remove or cover protrusions or sharp edges that could puncture flashings. 2. Install pre- fabricated end dams, inside and outside corners in accordance with manufacturers printed installation instructions, set in mastic or sealant and as described below. Field fabricated corners and end dams will not be allowed. 3. Install stainless steel drip plates, including pre- fabricated inside and outside corners, in accordance with manufacturers printed installation instructions, set in mastic or sealant and as described below. Field fabricated corners will not be allowed. 4. Lap seams in drip plate 4 inches and "bayonet" drip edge. Set laps in full bed of mastic or sealant. Seal top edges of laps watertight with mastic or sealant at 1/8"-1/4" thickness x 1-1/2 " wide. 5. Extend stainless steel drip plates through exterior face of masonry to form drip. Install joint sealer below drip edge to prevent moisture migration under flashing. This is in addition to the mastic or sealant that drip plate is set in. 6. Install flexible flashing (Stainless Steel/ Polymer Fabric Flashing) in full bed of mastic or sealant. in maximum length sections avoiding seams wherever possible. Where seams are unavoidable, lap all seams a minimum of four inches. Use a roller to firmly press flashing into mastic or sealant without air pockets. pply mastic or sealant on top of the overlap at 1/8"-1/4" thickness x 1-1/2 "wide. 7. Extend flexible flashings full width at such interruptions and turn up at least 8 inches onto back up wall. Use a roller to firmly press flashing into mastic or sealant and onto surface PW

7 3.12 LINTELS of wall and drip edge flashing without air pockets or wrinkles. pply mastic on top at 1/8"-1/4" thickness x 1-1/2 "wide. Install termination bar at top of flashing and seal. 8. Hold the outer edge of of flashing back 3/4 inch from the exposed face of wall and install a tooled bead of mastic or sealant along the front edge of Stainless Steel/ Polymer Fabric flashing. Exercise care to not allow excess mastic or sealant to extend beyond face of brick. 9. lways support the flexible flashing (Stainless Steel I Polymer Fabric Flashing) where it extends through a masonry cavity. Depending on actual conditions either grout fully under the flashing or extend drip plate all of the way through cavity to back up and turn up at least 1 inch. Set in full bed of mastic or sealant. Fabricate custom drip plates where manufactured drip plates do not provide flexible flashing support.. Install loose steel lintels over openings. B. Install reinforced unit masonry lintels over openings where steel lintels are not scheduled as shown on drawings. 1. Do not splice reinforcing bars. 2. Support and secure reinforcing bars from displacement. Maintain position within 1/2 inch of dimensioned position. 3. Place and consolidate grout fill without displacing reinforcing. 4. llow masonry lintels to attain specified strength before removing temporary supports GROUTED COMPONENTS. Lap splices a minimum 24 bar diameters or as indicated on drawings, whichever is most stringent. Tie together with Rebar Lap- Joint Ties B. Support and secure reinforcing bars from displacement. Maintain position within 1/2 inch of dimensioned position. C. Place and consolidate grout fill without displacing reinforcing. D. t bearing locations, fill masonry cores with grout for a minimum 12 inches either side of opening. E. Reinforce bond beams, column's, and grouted cores as shown on drawings CONTROL ND EXPNSION JOINTS. Do not continue horizontal joint reinforcement through control and expansion joints. B. Form control joint with a sheet building paper bond breaker fitted to one side of the hollow contour end of the block unit. Fill the resultant core with grout fill. Rake joint at exposed unit faces for placement of backer rod and sealant. C. Install preformed control joint device in continuous lengths. Seal butt and corner joints in accordance with manufacturer's instructions. D. Form expansion joint as detailed, locate where shown on drawings. E. Space movement joints at a minimum as recommended by the Brick Industry ssociation Technical Notes on Brick Construction "ccommodating Expansion of Brickwork" Publication 18, or as shown on drawings, whichever is more stringent. For joints not shown on drawings, or in conflict with referenced publication, obtain rchitects approval prior to installation BUILT-IN WORK. s work progresses, install built-in metal door frames, glazed frames, fabricated metal frames, window frames, anchor bolts, plates, and other items furnished by others and required to be built in. B. Install built-in items plumb, level, and true to line. C. Bed anchors of metal door and glazed frames in adjacent mortar joints. Fill frame voids solid with grout. PW

8 1. Fill adjacent masonry cores with grout minimum 12 inches from framed openings or as shown on drawings, whichever is most stringent. D. Do not build into masonry construction organic materials that are subject to deterioration TOLERNCES. Maximum Variation from lignment of Columns: 1/4 inch. B. Maximum Variation From Unit to djacent Unit: 1/16 inch. C. Maximum Variation from Plane of Wall: 1/4 inch in 1 0 ft and 1/2 inch in 20 ft or more. D. Maximum Variation from Plumb: 1/4 inch per story non-cumulative; 1/2 inch in two stories or more. E. Maximum Variation from Level Coursing: 1/8 inch in 3ft and 1/4 inch in 10ft; 1/2 inch in 30ft. F. Maximum Variation of Joint Thickness: 1/8 inch in 3ft. G. Maximum Variation from Cross Sectional Thickness of Walls: 1/4 inch CUTTING ND FITTING. Cut and fit for chases, pipes, conduit, sleeves, grounds, and other similar items. Coordinate with other sections of work to provide correct size, shape, and location.see drawings for specific block- out locations. B. Obtain approval prior to cutting or fitting masonry work not indicated or where appearance or strength of masonry work may be impaired FIELD QULITY CONTROL. n independent testing agency will perform field quality control tests, as specified in Section B. Clay Masonry Unit Tests: Test each variety of clay masonry in accordance with STM C67 requirements, sampling 5 randomly chosen units for each 50,000 installed. C. Concrete Masonry Unit Tests: Test each variety of concrete unit masonry in accordance with STM C140 for conformance to requirements of this specification. D. Mortar Tests: Test each type of mortar in accordance with STM C780, testing with same frequency as masonry samples CLENING. B. Remove excess mortar and mortar droppings. Replace defective mortar. Match adjacent work. C. Before full-scale application of cleaning products begins, review manufacturers application data to determine suitability of cleaning of specific materials and surfaces. pply cleaner to test area to determine optimum dwell time, compatibility, effectiveness, rinsing and other pertinent application procedures that would affect the effectiveness of the cleaning operations with respect to desired results. Use the least caustic materials and methods required to produce desired results. llow test areas to dry thoroughly before evaluating the final results with the rchitect. D. Clean soiled surfaces with cleaner in accordance with manufacturer's recommendations. If improvements are necessary to achieve proper cleaning of surfaces, alternate cleaning methods may be used only with approval of the rchitect. E. Use non-metallic tools in cleaning operations FILLED ND POLISHED GROUND BLOCK SELER. pply a finish coat of manufacturers water based sealer to walls after clean down and when the walls are dry. pply with airless sprayer, evenly to cover the entire surface without forming drips or runs. PW

9 3.21 PROTECTION Without damaging completed work, provide protective boards at exposed external corners that are subject to damage by construction activities. END OF SECTION PW

10 THIS PGE INTENTIONLLY LEFT BLNK