section 04 0523 - adjustable concealed lintel system · 2018. 4. 9. · 1.3 coordination a....

GWWO Project No. 1323 © 2015 GWWO, Inc.Frederick High School Replacement ADJUSTABLE CONCEALED LINTEL SYSTEMIssued for BID DOCUMENTS - 02/09/2015 04 0523 - 1

SECTION 04 0523 - ADJUSTABLE CONCEALED LINTEL SYSTEM

PART 1 - GENERAL

1.1 SECTION INCLUDES

A. Design, engineering and installation of an adjustable concealed lintel system and accessories,including spin system with mid- support if needed.

B. Support brackets to be attached to anchor channels.

1.2 REFERENCE STANDARDS

A. ASTM A36/A36M - Standard Specification for Carbon Structural Steel.

B. ASTM A123/A123M - Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron andSteel Products.

C. ASTM A153/A153M - Standard Specification for Zinc Coating (Hot-Dip) on Iron and SteelHardware.

D. ASTM A276 - Standard Specification for Stainless Steel Bars and Shapes.

E. ASTM B633 - Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel.

F. ASTM F568M - Standard Specification for Carbon and Alloy Steel Externally Threaded MetricFasteners.

G. ASTM F738M - Standard Specification for Stainless Steel Metric Bolts, Screws, and Studs.

H. AWS B2.1/B2.1M - Specification for Welding Procedure and Performance Qualification.

I. AWS D1.1/D1.1M - Structural Welding Code - Steel.

1.3 COORDINATION

A. Coordinate the Work with installation of component assembly into masonry components withoutinterfering with masonry reinforcement.

B. Coordinate welding in accordance with AWS B2.1/B2.1M for mid-span support.

1.4 PREINSTALLATION MEETINGS

A. Convene pre-installation meeting 1 week before start of work of this section.

B. Require attendance of parties directly affecting work of this section, including Contractor,Architect, Engineer, installer, and manufacturer’s representative.

C. Review materials, preparation, installation, tolerances, protection, and coordination with otherwork.

1.5 SUBMITTALS

A. Product Data: Submit manufacturer’s product data, including installation instructions.


B. Shop Drawings:1. Submit manufacturer’s shop drawings, indicating component profiles, sizes, connection

attachments, anchorage, size and type of fasteners, and accessories. Shop drawingsshall be signed and sealed by the qualified professional engineer registered in the state ofinstallation nd responsible for the system design.

2. Indicate welded connections using standard welding symbols.3. Indicate net weld lengths.4. Manufacturer’s Certification: Submit manufacturer’s certification that materials comply with

specified requirements and are suitable for intended application.5. Design Data: Submit manufacturer’s design data, including structural calculations, signed

and sealed by qualified professional engineer registered in state of the installation.6. Warranty Documentation: Submit manufacturer’s standard warranty.

1.6 QUALITY ASSURANCE

A. Manufacturer’s Qualifications:1. Capable of providing field service representation during installation.2. Minimum of 5 years of experience in manufacture of adjustable concealed lintel system for

masonry.3. Experience in projects of similar scope.4. Manufacture in accordance with established quality assurance program.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Delivery and Acceptance Requirements: Deliver materials to site in manufacturer’s original,unopened containers and packaging, with labels clearly identifying product name andmanufacturer.

B. Storage and Handling Requirements:1. Store and handle materials in accordance with manufacturer’s instructions.2. Keep materials in manufacturer’s original, unopened containers and packaging until

installation.3. Store materials in clean, dry area indoors.4. Protect materials and finish during storage, handling, and installation to prevent damage.

PART 2 - PRODUCTS

2.1 MANUFACTURER

A. Halfen USA Inc.: www.halfenusa.com or approved equal.

2.2 DESIGN CRITERIA

A. Concealed Lintel Assembly: Lintel shall resist loads as follows without damage or permanentset to components or masonry:1. Brick Veneer Height: As indicated on drawings.

2.3 MATERIALS

A. Adjustable Concealed Lintel System for Masonry:1. Concealed Lintel Spines / Horseshoe Plates / Stitching Rods / Mid-span Support:

Structural carbon steel, ASTM A36, then hot-dip galvanized, ASTM A123 or A153 asapplicable.


2. Anchor Channel / Support Brackets / Stitching Rods: Structural carbon steel, ASTM A36,then hot-dip galvanized, ASTM A123 or A153 as applicable.a. Bolts and Nuts:

1) Bolt-Type Fasteners: T-head, in contact with channel slot faces, carbon steel,ASTM F568M.

2) Finish for Carbon Steel T-Bolts: Hot-dip galvanized, ASTM A123.3) Nuts: Carbon steel.

2.4 FABRICATION

A. Fabricate components to design required and provide for site-required adjustments.

B. Weld and grind components flush and smooth with adjacent finish surface.1. Make exposed joints butt tight, flush, and hairline.2. Ease exposed edges to small uniform radius.

C. Weld components indicated on shop drawings.

2.5 FINISHES

A. Structural Carbon Steel Components and Anchors: Hot-dip galvanized after fabrication, ASTMA123.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine areas and supports to receive adjustable concealed lintel system.

B. Verify dimensions, tolerances, and method of attachment with other work.

C. Notify Architect of conditions that would adversely affect installation.

D. Do not begin installation until unacceptable conditions are corrected.

3.2 PREPARATION

A. Supply items required to be placed in masonry with setting templates to appropriate sections.

3.3 INSTALLATION

A. Install adjustable concealed lintel system in accordance with manufacturer’s instructions atlocations indicated on the Drawings.

B. All joints to be roped during brick installation.

C. Install items plumb and level, accurately fitted, free from distortion or defects.

D. Adjust components to suit site conditions.

E. Provide formwork for placement in masonry to maintain true alignment until completion ofpermanent attachment.

F. Obtain approval from Architect and manufacturer before site cutting or making adjustments notscheduled.


G. Perform field welding in accordance with AWS D1.1/D1.1M where necessary using certifiedwelders.

3.4 TOLERANCES

A. Maximum Variation from Plumb: 1/8 inch.

3.5 PROTECTION

A. Protect installed adjustable concealed lintel system from damage during construction.

B. Touch-up damage to factory-applied finishes using appropriate materials and techniques.

END OF SECTION

GWWO Project No. 1323 © 2015 GWWO, Inc.Frederick High School Replacement UNIT MASONRYIssued for BID DOCUMENTS - 02/09/2015 04 2000 - 1

SECTION 04 2000 - UNIT MASONRY

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:1. Concrete masonry units.2. Decorative concrete masonry units.3. Face brick.4. Cast stone trim units.5. Mortar and grout.6. Steel reinforcing bars.7. Masonry joint reinforcement.8. Ties and anchors.9. Flexible flashing.10. Weeps.11. Cavity drainage material.12. Miscellaneous masonry accessories.

1.2 DEFINITIONS

A. CMU(s): Concrete masonry unit(s).

B. Reinforced Masonry: Masonry containing reinforcing steel in grouted cells.

1.3 PERFORMANCE REQUIREMENTS

A. Provide unit masonry that develops indicated net-area compressive strengths at 28 days.1. Determine net-area compressive strength of masonry from average net-area compressive

strengths of masonry units and mortar types (unit-strength method) according to Tables 1and 2 in ACI 530.1/ASCE 6/TMS 602.

1.4 PRECONSTRUCTION TESTING

A. Preconstruction Testing Service: Owner will engage a qualified independent testing agency toperform preconstruction testing indicated below. Retesting of materials that fail to comply withspecified requirements shall be done at Contractor's expense.1. Clay Masonry Unit Test: For each type of unit required, according to ASTM C 67 for

compressive strength.2. Concrete Masonry Unit Test: For each type of unit required, according to ASTM C 140 for

compressive strength. In lieu of independent testing, manufacturer's certification of planttesting and results is acceptable.

3. Mortar Test (Property Specification): For each mix required, according to ASTM C 109/C109M for compressive strength, ASTM C 1506 for water retention, and ASTM C 91 for aircontent.

4. Mortar Test (Property Specification): For each mix required, according to ASTM C 780 forcompressive strength.

5. Grout Test (Compressive Strength): For each mix required, according to ASTM C 1019.

1.5 ACTION 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 ofreinforced walls.

3. Fabricated Flashing: Detail corner units, end-dam units, and other special applications.

C. Samples for Initial Selection:1. Decorative CMUs, in the form of small-scale units.2. Face brick, in the form of straps of five or more bricks.3. Flexible flashing.4. Cavity drainage material.5. Cast Stone trim.6. Weep holes/vents.

D. Sample Panels for Initial Selection: Build sample panels to verify selections made undersample submittals and to demonstrate aesthetic effects. Comply with requirements in Division 1Section "Quality Requirements" for mockups.1. Build sample panels for each type of exposed unit masonry construction (including Brick

Masonry, Concrete Masonry Units, Acoustic Concrete Masonry Units, andDecorative/Ground Face Concrete Masonry Units) in sizes approximately 60 inches (1500mm) long by 48 inches (1200 mm) high by full thickness.a. Build sample panels for each pairing of Brick Masonry described above, as well as for

each type of Concrete Masonry Unit (including acoustic masonry and all productslisted in ground face/decorative "Available Products"). Architect and Owner shallselect brick masonry and ground face/decorative concrete unit masonry material aftersample panels are constructed. Coordinate timing of construction of sample panelswith Construction Manager to ensure timely delivery of material for all masonryconstruction.

b. Build sample panels in a location that can remain undisturbed until Mockup panels arefully constructed. Build sample panels in a location facing east in which all panelsreceive identical sunlight conditions at the same time between 9 AM and 11 AM(without shadowing on some panels) so that materials can be evaluated in identicallighting conditions.

2. Clean exposed faces of panels with masonry cleaner indicated.3. Protect approved sample panels from the elements with weather-resistant membrane.4. Approval of sample panels is for color, texture, and blending of masonry units; relationship

of mortar and sealant colors to masonry unit colors; tooling of joints; aesthetic qualities ofworkmanship; and other material and construction qualities specifically approved byArchitect in writing.a. Approval of sample panels does not constitute approval of deviations from the

Contract Documents contained in sample panels unless such deviations arespecifically approved by Architect in writing.

E. Samples for Verification: For each type and color of the following:1. Special brick shapes.2. Accessories embedded in masonry.

F. LEED Submittals:1. LEED Credit MR 4: Product data for products having recycled content, indicating

percentages by weight of postconsumer and preconsumer recycled content. Includestatement of cost for each product having recycled content.

2. LEED Credit MR 5: Product data for products and materials that comply with requirementsfor regional materials indicating location and distance from Project of material manufacture


and point of extraction, harvest, or recovery for each raw material. Include statementindicating cost for each regional material and the fraction by weight that is consideredregional.

1.6 INFORMATIONAL SUBMITTALS

A. List of Materials Used in Constructing Mockups: List generic product names together withmanufacturers, manufacturers' product names, model numbers, lot numbers, batch numbers,source of supply, and other information as required to identify materials used. Include mixproportions for mortar and grout and source of aggregates.1. Submittal is for information only. Neither receipt of list nor approval of mockup constitutes

approval of deviations from the Contract Documents unless such deviations arespecifically brought to the attention of Architect and approved in writing.

B. Qualification Data: For testing agency.

C. Material Certificates: For each type and size of the following:1. Masonry units.

a. Include material test reports substantiating compliance with requirements.b. For brick, include size-variation data verifying that actual range of sizes falls within

specified tolerances.c. For exposed brick, include test report for efflorescence according to ASTM C 67.d. 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. Preblended, 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.

D. Mix Designs: For each type of mortar and grout. Include description of type and proportions ofingredients.1. Include test reports for mortar mixes required to comply with property specification. Test

according to ASTM C 109/C 109M for compressive strength, ASTM C 1506 for waterretention, and ASTM C 91 for air content.

2. Include test reports, according to ASTM C 1019, for grout mixes required to comply withcompressive strength requirement.

E. Statement of Compressive Strength of Masonry: For each combination of masonry unit typeand 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 toTables 1 and 2 in ACI 530.1/ASCE 6/TMS 602.

F. Cold-Weather and Hot-Weather Procedures: Detailed description of methods, materials, andequipment to be used to comply with requirements.


A. Testing Agency Qualifications: Qualified according to ASTM C 1093 for testing indicated.

B. Source Limitations for Masonry Units: Obtain exposed masonry units of a uniform texture andcolor, or a uniform blend within the ranges accepted for these characteristics, from singlesource from single manufacturer for each product required.


C. Source Limitations for Mortar Materials: Obtain mortar ingredients of a uniform quality, includingcolor for exposed masonry, from single manufacturer for each cementitious component andfrom single source or producer for each aggregate.

D. Masonry Standard: Comply with ACI 530.1/ASCE 6/TMS 602 unless modified by requirementsin the Contract Documents.

1.8 CAVTY WALL MOCK-UP

A. Mockups: Build mockups to verify selections made under sample submittals and todemonstrate aesthetic effects and set quality standards for materials and execution.1. Build a sample panel as shown on Drawings with each type of exposed unit masonry

assembly by full thickness in order to demonstrate inside and outside corners.a. Include a sealant-filled joint at least 16 inches (400 mm) long in mockup.b. Include lower corner of window opening framed with stone trim at upper corner of

exterior wall mockup. Make opening approximately 12 inches (300 mm) wide by 16inches (400 mm) high.

c. Include through-wall flashing installed for a 24-inch (600-mm) length in corner ofexterior wall mockup approximately 16 inches (400 mm) down from top of mockup,with a 12-inch (300-mm) length of flashing left exposed to view (omit masonry abovehalf of flashing).

d. Include all components associated with the specified cavity walls; including but notlimited to vertical reinforcement, insulation, water-proofing, ties, anchors, flashing,sealant, mortar, and weeps.

2. Clean exposed faces of mockups with masonry cleaner as indicated.3. Protect accepted mockups from the elements with weather-resistant membrane.4. Mockups will not be demolished or moved prior to issuance of substantial completion.5. Approval of mockups is for color, texture, and blending of masonry units; relationship of

mortar and sealant colors to masonry unit colors; tooling of joints; and aesthetic qualities ofworkmanship.a. Approval of mockups is also for other material and construction qualities specifically

approved by Architect in writing.b. Approval of mockups does not constitute approval of deviations from the Contract

Documents contained in mockups unless such deviations are specifically approved byArchitect in writing.


A. Store masonry units on elevated platforms in a dry location. If units are not stored in anenclosed location, cover tops and sides of stacks with waterproof sheeting, securely tied. Ifunits become wet, do not install until they are dry.

B. Store cementitious materials on elevated platforms, under cover, and in a dry location. Do notuse cementitious materials that have become damp.

C. Store aggregates where grading and other required characteristics can be maintained andcontamination avoided.

D. Deliver preblended, dry mortar mix in moisture-resistant containers designed for use withdispensing silos. Store preblended, dry mortar mix in delivery containers on elevated platforms,under cover, and in a dry location or in covered weatherproof dispensing silos.

E. Store masonry accessories, including metal items, to prevent corrosion and accumulation of dirtand oil.


1.10 PROJECT CONDITIONS

A. Protection of Masonry: During construction, cover tops of walls, projections, and sills withwaterproof sheeting at end of each day's work. Cover partially completed masonry whenconstruction is not in progress.1. Extend cover a minimum of 24 inches (600 mm) down both sides of walls and hold cover

securely in place.2. Where one wythe of multiwythe masonry walls is completed in advance of other wythes,

secure cover a minimum of 24 inches (600 mm) down face next to unconstructed wytheand hold cover in place.

B. Stain Prevention: Prevent grout, mortar, and soil from staining the face of masonry to be leftexposed or painted. Immediately remove grout, mortar, and soil that come in contact with suchmasonry.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.

C. Cold-Weather Requirements: Do not use frozen materials or materials mixed or coated with iceor frost. Do not build on frozen substrates. Remove and replace unit masonry damaged byfrost or by freezing conditions. Comply with cold-weather construction requirements containedin ACI 530.1/ASCE 6/TMS 602.1. Cold-Weather Cleaning: Use liquid cleaning methods only when air temperature is 40 deg

F (4 deg C) and higher and will remain so until masonry has dried, but not less than sevendays after completing cleaning.

D. Hot-Weather Requirements: Comply with hot-weather construction requirements contained inACI 530.1/ASCE 6/TMS 602.

PART 2 - PRODUCTS

2.1 MASONRY UNITS, GENERAL

A. Defective Units: Referenced masonry unit standards may allow a certain percentage of units tocontain chips, cracks, or other defects exceeding limits stated in the standard. Do not use unitswhere such defects will be exposed in the completed Work.

B. Fire-Resistance Ratings: Where indicated, provide units that comply with requirements forfire-resistance ratings indicated as determined by testing according to ASTM E 119, byequivalent masonry thickness, or by other means, as acceptable to authorities havingjurisdiction.

C. Unit Sizes: As indicated on drawings.

D. Shapes: Provide shapes indicated and as follows, with exposed surfaces matching exposedfaces of adjacent units unless otherwise indicated.1. Provide special shapes for corners, jambs, sashes, movement joints, headers, bonding,

and other locations as indicated on drawings.


2. For ends of sills and caps and for similar applications that would otherwise exposeunfinished surfaces, provide units without cores or frogs and with exposed surfacesfinished.

2.2 CONCRETE MASONRY UNITS

A. LEED Credit MR 5: Subject to compliance with requirements, provide concrete masonry unitsthat have been extracted, harvested or recovered, and manufactured within 500 miles of Projectsite.

B. Integral Water Repellent: Provide units made with integral water repellent for exposed exteriorunits.1. Integral Water Repellent: Liquid polymeric, integral water-repellent admixture that does

not reduce flexural bond strength. Units made with integral water repellent, when testedaccording to ASTM E 514 as a wall assembly made with mortar containing integralwater-repellent manufacturer's mortar additive, with test period extended to 24 hours, shallshow no visible water or leaks on the back of test specimen.a. Products: Subject to compliance with requirements, available products that may be

incorporated into the Work include, but are not limited to, the following:1) ACM Chemistries; RainBloc.2) BASF Aktiengesellschaft; Rheopel Plus.3) Grace Construction Products, W. R. Grace & Co. - Conn.; Dry-Block.

C. CMUs: ASTM C 90 (042000-A).1. LEED Credit MR 4: Subject to compliance with requirements, provide minimum recycled

content of 25% combined.2. Unit Compressive Strength: Provide units with minimum average net-area compressive

strength of 1900 psi.3. Density Classification: Medium weight, 135 pcf min.

D. Decorative CMUs: ASTM C 90.1. LEED Credit MR 4: Subject to compliance with requirements, provide minimum recycled

content of 25% combined.2. 042000-C1: Ground Face CMU. Select from one of the three following acceptable

products:a. Westbrook Concrete Block; Color: GF-606.b. Trenwyth - Trendstone; Color: Natural.c. E. Dillon & Company, Color: Salt and Pepper.

3. 042000-C2: Ground Face CMU. Select from one of the three following acceptableproducts:a. Westbrook Concrete Block; Color: GF-608.b. Trenwyth - Trendstone; Color: Dover Grey.c. E. Dillon & Company, Color: Shadow.

4. Unit Compressive Strength: Provide units with minimum average net-area compressivestrength of 2800 psi.

5. Density: 130 pcf min.

2.3 BRICK

A. General: Provide shapes indicated and as follows, with exposed surfaces matching finish andcolor of exposed faces of adjacent units: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 surfacesfinished.


2. Provide special shapes for applications where stretcher units cannot accommodate specialconditions, including those at corners, movement joints, bond beams, sashes, and lintels.

3. Provide special shapes for applications requiring brick of size, form, color, and texture onexposed surfaces that cannot be produced by sawing.

4. Provide special shapes for applications where shapes produced by sawing would result insawed surfaces being exposed to view.

B. Face Brick: Facing brick complying with ASTM C 216 or hollow brick complying with ASTM C652, Class H40V (void areas between 25 and 40 percent of gross cross-sectional area).

C. Size (Actual dimensions):1. As indicated on drawings.

D. Grade: SW

E. Brick Schedule: Provide pricing for one of the following manufacturer's grouping:1. Manufacturer A: Cushwa/Belden.

a. 042000-B1: #104 Victorian, molded, FBS.b. 042000-B2: Rum Raisin Velour A, extruded, FBX.c. 042000-B3: 8533, extruded, FBX.d. 042000-B4: Sea Gray Velour, extruded, FBX.

2. Manufacturer B: Glen Gery.a. 042000-B1: 56 DD, molded, FBS.b. 042000-B2: Engobe Series WA12-1006, extruded, FBX.c. 042000-B3: Dark Brown Grey, extruded, FBX.d. 042000-B4: Cool Spring Grey, extruded, FBX.

2.4 CAST STONE TRIM UNITS

A. LEED Credit MR 5: Subject to compliance with requirements, provide cast stone that has beenextracted, harvested or recovered, and manufactured within 500 miles of Project site.

B. Acceptable Manufacturers:1. Sun Precast Co., Inc.2. Northern Virginia Cast Stone3. Stafford Stone Works

C. Architectural concrete product manufactured to simulate appearance of natural granite,complying with ASTM C1364.1. Compressive Strength: ASTM C 1194, 6500 psi min at 28 days.2. Absorption: per ASTM C 1195: 6% maximum at 28 days.3. Portland Cement: Type I or III, white, ASTM C 1504. Coarse Aggregates: Granite, quartz or limestone, ASTM C 33, except for gradation.5. Fine aggregates: Natural sands, except for gradation.6. Colors: Inorganic iron oxide pigments, ASTM C4947. Admixtures: ASTM C 494

D. Color and Finish1. Fine grain texture, free of voids and bungholes.2. Color: As selected by Architect from Manufacturer's custom colors.

E. Shapes: Provide shapes indicated on drawings.1. Variation from Any Dimension, Including Bow, Camber, and Twist: Maximum of

plus/minus 1/8 inch or length divided by 360, whichever is greater, but not more than 1/4inch.


2. Unless otherwise indicated on drawings, provide:a. Wash or slope of 1:12 on exterior horizontal surfaces.b. Drips on projecting components, wherever possible. c. Raised fillets at back of sills and at ends to be built in.

F. Materials1. Portland Cement: ASTM C150.

a. For Mortar: Type I or II, except Type III may be used in cold weather.2. Coarse Aggregate: ASTM C33, except for gradation; granite, quartz, or limestone.3. Fine Aggregate: ASTM C33, except for gradation; natural or manufactured sands.

G. Reinforcing: per ASTM A615, epoxy coated when within 1 1/2 inch of the surface.

H. Anchors: type 304 stainless steel.

2.5 MORTAR AND GROUT MATERIALS

A. LEED Credit MR 5: Subject to compliance with requirements, provide mortar and groutmaterials that have been extracted, harvested or recovered, and manufactured within 500 milesof Project site.

B. Portland Cement: ASTM C 150, Type I or II, except Type III may be used for cold-weatherconstruction. Provide natural color or white cement as required to produce mortar colorindicated.

C. Hydrated Lime: ASTM C 207, Type S.

D. Portland Cement-Lime Mix: Packaged blend of portland cement and hydrated lime containingno other ingredients.

E. Colored Cement Product: Packaged blend made from portland cement and hydrated lime andmortar pigments, all complying with specified requirements, and containing no other ingredients.1. Products: Subject to compliance with requirements, available products that may be

incorporated into the Work include, but are not limited to, the following:a. Colored Portland Cement-Lime Mix:

1) Capital Materials Corporation; Riverton Portland Cement Lime Custom Color.2) Holcim (US) Inc.; Rainbow Mortamix Custom Color Cement/Lime.3) Lafarge North America Inc.; Eaglebond Portland & Lime.4) Lehigh Cement Company; Lehigh Custom Color Portland/Lime Cement.

2. Formulate blend as required to produce color indicated or, if not indicated, as selectedfrom manufacturer's standard colors.

3. Pigments shall not exceed 10 percent of portland cement by weight.

F. 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 (6 mm) thick, use aggregate graded with 100 percent passing

the No. 16 (1.18-mm) sieve.

G. Aggregate for Grout: ASTM C 404.

H. Cold-Weather Admixture: Nonchloride, noncorrosive, accelerating admixture complying withASTM C 494/C 494M, Type C, and recommended by manufacturer for use in masonry mortar ofcomposition indicated.


1. Products: Subject to compliance with requirements, available products that may beincorporated into the Work include, but are not limited to, the following:a. Euclid Chemical Company (The); Accelguard 80.b. Grace Construction Products, W. R. Grace & Co. - Conn.; Morset.c. Sonneborn Products, BASF Aktiengesellschaft; Trimix-NCA.

I. Water: Potable.

2.6 REINFORCEMENT

A. LEED Credit MR 4: Subject to compliance with requirements, provide minimum recycled contentof 60% combined.

B. LEED Credit MR 5: Subject to compliance with requirements, provide materials that have beenextracted, harvested or recovered, and manufactured within 500 miles of Project site.

C. Uncoated Steel Reinforcing Bars: ASTM A 615/A 615M or ASTM A 996/A 996M, Grade 60(Grade 420).

D. Masonry Joint Reinforcement, General: ASTM A 951/A 951M.1. Interior Walls: Hot-dip galvanized, carbon steel.2. Exterior Walls: Hot-dip galvanized, carbon steel.3. Wire Size for Side Rods: 0.148-inch diameter.4. Wire Size for Cross Rods: 0.148-inch diameter.5. Wire Size for Veneer Ties: 0.148-inch diameter.6. Spacing of Cross Rods, Tabs, and Cross Ties: Not more than 16 inches o.c.7. Provide in lengths of not less than 10 feet, with prefabricated corner and tee units.

E. Masonry Joint Reinforcement for Single-Wythe Masonry: Either ladder or truss type with singlepair of side rods.

F. Masonry Joint Reinforcement for Multiwythe Masonry:1. Tab type, either ladder or truss design, with 1 side rod at each face shell of backing wythe

and with rectangular tabs sized to extend at least halfway through facing wythe but with atleast 5/8-inch (16-mm) cover on outside face.

G. Masonry Joint Reinforcement for Veneers Anchored with Seismic Masonry-Veneer Anchors: Single 0.187-inch- (4.76-mm-) diameter, hot-dip galvanized, carbon -steel continuous wire.

2.7 TIES AND ANCHORS

A. LEED Credit MR 5: Subject to compliance with requirements, provide materials that have beenextracted, harvested or recovered, and manufactured within 500 miles of Project site

B. Materials: Provide ties and anchors specified in this article that are made from materials thatcomply with the following unless otherwise indicated.1. Hot-Dip Galvanized, Carbon-Steel Wire: ASTM A 82/A 82M; with ASTM A 153/A 153M,

Class B-2 coating.2. Galvanized Steel Sheet: ASTM A 653/A 653M, Commercial Steel, G60 (Z180) zinc

coating.3. Steel Sheet, Galvanized after Fabrication: ASTM A 1008/A 1008M, Commercial Steel,

with ASTM A 153/A 153M, Class B coating.4. Steel Plates, Shapes, and Bars: ASTM A 36/A 36M.


C. Wire Ties, General: Unless otherwise indicated, size wire ties to extend at least halfwaythrough veneer but with at least 5/8-inch cover on outside face. Outer ends of wires are bent 90degrees and extend 2 inches parallel to face of veneer.

D. Adjustable Anchors for Connecting to Structural Steel Framing: See drawings.1. Anchor Section for Welding to Steel Frame: Crimped 1/4-inch- diameter, hot-dip

galvanized steel wire. Mill-galvanized wire may be used at interior walls unless otherwiseindicated.

2. Tie Section: Triangular-shaped wire tie, sized to extend within 1 inch of masonry face,made from 0.187-inch- 0.25-inch diameter, hot-dip galvanized steel wire. Mill-galvanizedwire may be used at interior walls unless otherwise indicated.

E. Adjustable Anchors for Connecting to Concrete: Provide anchors that allow vertical orhorizontal adjustment but resist tension and compression forces perpendicular to plane of wall.1. Connector Section: Dovetail tabs for inserting into dovetail slots in concrete and attached

to tie section; formed from 0.060-inch thick, steel sheet, galvanized after fabrication.2. Tie Section: Triangular-shaped wire tie, sized to extend within 1 inch of masonry face,

made from 0.25-inch diameter, hot-dip galvanized steel wire. Mill-galvanized wire may beused at interior walls unless otherwise indicated.

F. Adjustable Masonry-Veneer Anchors:1. General: Provide anchors that allow vertical adjustment but resist tension and

compression forces perpendicular to plane of wall, for attachment over sheathing to woodor metal studs, and as follows:a. Structural Performance Characteristics: Capable of withstanding a 100-lbf (445-N)

load in both tension and compression without deforming or developing play in excessof 0.05 inch.

2. 2-piece Masonry-Veneer Anchors: To be used where Masonry-Veneer height changes percoursing.a. Basis of Design Product:

1) Hohmann & Barnard, Inc.; Tie-HVR-295V Anchor System: www.h-b.com.(a) Ladder reinforcement shall compensate for extra 1/2 inch insulation

thickness due -1/4" to +1/2" tolerance of spray foam insulation.3. Screw-Attached or Bolt-Attached, Masonry-Veneer Anchors: Units consisting of a wire tie

and a metal anchor section to be used where back-up wall is cold-formed steel framing.a. Products: Subject to compliance with requirements, available products that may be

incorporated into the Work include, but are not limited to, the following:1) Construction Tie Products; CTP 16.2) Fero Corporation; Slotted Heavy Duty Rap-Tie.3) Blok-Lok; BL 407.4) Hohmann & Barnard, Inc.; BL-407.

b. Anchor Section: Gasketed sheet metal plate, 1-1/4 inches wide by 6 inches long, withscrew holes top and bottom; top and bottom ends bent to form pronged legs of lengthto match thickness of insulation or sheathing; and raised rib-stiffened strap, 5/8 inchwide by 6 inches long, stamped into center to provide a slot between strap and platefor inserting wire tie. Provide anchor manufacturer's standard, self-adhering, modifiedbituminous gaskets manufactured to fit behind anchor plate and extend beyondpronged legs.

c. Anchor Section: Corrosion-resistant, self-drilling, eye-screw designed to receive wiretie. Eye-screw has spacer that seats directly against framing and is same thicknessas sheathing and has gasketed, washer head that covers hole in sheathing.

d. Fabricate sheet metal anchor sections and other sheet metal parts from 0.109-inch-thick, stainless-steel sheet.


e. Wire Ties: Triangular-, rectangular-, or T-shaped wire ties fabricated from 0.187-inch-diameter, hot-dip galvanized steel wire.

G. Rigid Anchors: Fabricate from steel bars 1-1/2 inches wide by 1/4 inch thick by 24 inches long,with ends turned up 2 inches or bent to configuration indicated.1. Corrosion Protection: Hot-dip galvanized to comply with ASTM A 153/A 153M.

2.8 MISCELLANEOUS ANCHORS

A. Use Type Inserts in Concrete: Cast-iron or malleable-iron wedge-type inserts.

B. B. Dovetail Slots in Concrete: Furnish dovetail slots with filler strips, of slot size indicated,fabricated from 0.034-inch (0.86-mm), galvanized steel sheet.

C. Post-installed Anchor Bolts: As indicated on drawings; hot-dip galvanized to comply with ASTMA 153/A 153M, Class C; of dimensions indicated.

2.9 FLASHINGS

A. LEED Credit MR 4: Subject to compliance with requirements, provide minimum recycled contentof 60% combined.

B. LEED Credit MR 5: Subject to compliance with requirements, provide materials that have beenextracted, harvested or recovered, and manufactured within 500 miles of Project site.

C. Stainless Steel/Polymer Fabric Flashing: ASTM A167, stainless steel sheet bonded withrubber-based adhesive to one sheet of polymer fabric.1. Manufacturer:

a. York Manufacturing, Inc; Multi-Flash SS: www.yorkmfg.com.b. Hohmann & Barnard, Inc.; Product Mighty-Flash: www.h-b.com.

2. Characteristics:a. Type: Stainless steel core with polymerfabric laminated to one stainless steel face

with non-asphalt adhesive.b. Stainless steel type: 304, ASTM A167.c. Fabric: polymer fabric; laminated back face of stainless steel core.d. Size: Manufacturer's standard width rolls.e. Polyether sealant:

1) York Manufacturing, Inc.; UniverSeal US-100 or equal.f. Splice Tape:

1) York Manufacturing, Inc.; York 304 Tape or equal.g. Corner and End Dams: form the stainless steel flashing in the field or use 26 gauge

stainless steel pre-manufactured corners.3. Locations:

a. Exterior door heads.b. Window heads and sills.c. Storefront and curtain wall heads.d. Horizontal control joints.e. Changes in veneer materials, vertically.f. Other wall openings.g. Other locations indicated.


2.10 MISCELLANEOUS MASONRY ACCESSORIES

A. Compressible Filler: Premolded filler strips complying with ASTM D 1056, Grade 2A1;compressible up to 35 percent; of width and thickness indicated; formulated from neopreneurethane .

B. Preformed Control-Joint Gaskets: Made from styrene-butadiene-rubber compound, complyingwith ASTM D 2000, Designation M2AA-805 and designed to fit standard sash block and tomaintain lateral stability in masonry wall; size and configuration as indicated.

C. Bond-Breaker Strips: Asphalt-saturated, organic roofing felt complying with ASTM D 226, TypeI (No. 15 asphalt felt).

D. Weeps: Polyester mesh.1. Manufacturers:

a. CavClear/Archovations, Inc; Weep Vents: www.cavclear.com.b. Mortar Net USA, Ltd; Mortar Net Weep Vents: www.mortarnet.com.

2. Size: 3 1/2" x 3 1/2" (sized for larger brick).3. Color: As selected by Architect from manufacturer's full range.

E. Cavity Drainage Material: Semi-rigid polyethylene or polyester mesh panels, sized to thicknessof wall cavity, and designed to prevent mortar droppings from clogging weeps and cavity ventsand allow proper cavity drainage.1. Full-Height Airspace Maintenance and Drainage Material (Keynote 042000-?). Polymer

mesh panels attached to rigid insulation of type indicated, for fitting between masonry tiesto loosely fill masonry cavity.a. Manufacturers:

1) CavClear/Archovations, Inc; CavClear Masonry Mat, 1/2" Thickness: www.cavclear.com.

2) Keene Building Envelope Products; Product Cav-Air-Ator, 1/2" Thickness: www.KeeneBuilding.com.

2. Mortar Diverter (Keynote 042000-?): Panels designed for installation at flashing locations.a. Manufacturers:

1) Mortar Net USA, Ltd; Mortar Net with Insect Barrier: www.mortarnet.com.2) Keene Building Envelope Products; Product KeeneStone Cut 1":

www.KeeneBuilding.com.

F. Reinforcing Bar Positioners: Wire units designed to fit into mortar bed joints spanning masonryunit cells and hold reinforcing bars in center of cells. Units are formed from 0.148-inch(3.77-mm) steel wire, hot-dip galvanized after fabrication. Provide units designed for number ofbars indicated.1. Products: Subject to compliance with requirements, available products that may be

incorporated into the Work include, but are not limited to, the following:a. Dayton Superior Corporation, Dur-O-Wal Division; D/A 810, D/A 812 or D/A 817.b. Hohmann & Barnard, Inc.; #RB or #RB-Twin Rebar Positioner.

G. Termination Bar: Manufacturer's standard continuous length stainless steel bar complete withstainless steel fasteners.

H. Skateboard Deterrents: Provide grouted in place skateboard deterrents in locations indicatedon drawings.1. Basis-of-Design: Mallory Rev A, 1/8 inch radius, by Skate Stoppers:

www.skatestoppers.com.2. Finish: Cast bronze.


2.11 MASONRY CLEANERS

A. Proprietary Acidic Cleaner: Manufacturer's standard-strength cleaner designed for removingmortar/grout stains, efflorescence, and other new construction stains from new masonry withoutdiscoloring or damaging masonry surfaces. Use product expressly approved for intended useby cleaner manufacturer and manufacturer of masonry units being cleaned.1. Manufacturers: Subject to compliance with requirements, available manufacturers offering

products that may be incorporated into the Work include, but are not limited to, thefollowing:a. Diedrich Technologies, Inc.b. EaCo Chem, Inc.c. ProSoCo, Inc.

2.12 MORTAR AND GROUT MIXES

A. LEED Credit MR 5: Subject to compliance with requirements, provide materials that have beenextracted, harvested or recovered, and manufactured within 500 miles of Project site.

B. General: Do not use admixtures, including pigments, air-entraining agents, accelerators,retarders, water-repellent agents, antifreeze compounds, or other admixtures, unless otherwiseindicated.1. Do not use calcium chloride in mortar or grout.2. Use portland cement-lime mortar unless otherwise indicated.3. For exterior masonry, use portland cement-lime mortar.4. For reinforced masonry, use portland cement-lime mortar.5. 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.

C. Preblended, Dry Mortar Mix: Furnish dry mortar ingredients in form of a preblended mix. Measure quantities by weight to ensure accurate proportions, and thoroughly blend ingredientsbefore delivering to Project site.

D. Mortar for Unit Masonry: Comply with ASTM C 270, Proportion Specification. Provide thefollowing types of mortar for applications stated unless another type is indicated or needed toprovide required compressive strength of masonry.1. For masonry below grade or in contact with earth, use Type M.2. For masonry above grade, use Type S.

E. Pigmented Mortar: Use colored cement product.1. Pigments shall not exceed 10 percent of portland cement by weight.2. Mix to match Architect's sample.3. Application: Use pigmented mortar for exposed mortar joints with the following units:

a. Decorative CMUs.b. Face brick.

F. 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 spacesand pour height.

2. Proportion grout in accordance with ASTM C 476, Table 1 or paragraph 4.2.2. for specified28-day compressive strength indicated, but no less than 3000 psi.

3. Provide grout with a slump of 8 to 11 inches (203 to 279 mm) as measured according toASTM C 143/C 143M.


PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine conditions, with Installer present, for compliance with requirements for installationtolerances and other conditions affecting performance of the 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 actuallocations 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 thicknessshown. Build single-wythe walls to actual widths of masonry units, using units of widthsindicated.

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 installingequipment, 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 continuouspattern 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 cutunits 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 andtextures.1. Mix units from several pallets or cubes as they are placed.

F. Matching Existing Masonry: Match coursing, bonding, color, and texture of existing masonry.

G. Wetting of Brick: Wet brick before laying if initial rate of absorption exceeds 30 g/30 sq. in. (30g/194 sq. cm) per minute when tested per ASTM C 67. Allow units to absorb water so they aredamp but not wet at time of laying.

H. Protect adjacent construction during installation of the Work.

3.3 TOLERANCES

A. Dimensions and Locations of Elements:1. 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).2. For location of elements in plan do not vary from that indicated by more than plus or minus

1/2 inch (12 mm).3. 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.


B. Lines and Levels:1. 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.2. 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 6m), or 1/2 inch (12 mm) maximum.

3. For vertical lines and surfaces do not vary from plumb by more than 1/4 inch in 10 feet (6mm in 3 m), 3/8 inch in 20 feet (9 mm in 6 m), or 1/2 inch (12 mm) maximum.

4. For conspicuous vertical lines, such as external corners, door jambs, reveals, andexpansion and control joints, do not vary from plumb by more than 1/8 inch in 10 feet (3mm in 3 m), 1/4 inch in 20 feet (6 mm in 6 m), or 1/2 inch (12 mm) maximum.

5. For lines and surfaces do not vary from straight by more than 1/4 inch in 10 feet (6 mm in3 m), 3/8 inch in 20 feet (9 mm in 6 m), or 1/2 inch (12 mm) maximum.

6. For vertical alignment of exposed head joints, do not vary from plumb by more than 1/4inch in 10 feet (6 mm in 3 m), or 1/2 inch (12 mm) maximum.

7. For faces of adjacent exposed masonry units, do not vary from flush alignment by morethan 1/16 inch (1.5 mm) except due to warpage of masonry units within tolerancesspecified for warpage of units.

C. 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 exposed bed joints, do not vary from bed-joint thickness of adjacent courses by more

than 1/8 inch (3 mm).3. 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).4. 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 morethan 1/8 inch (3 mm).

5. For exposed bed joints and head joints of stacked bond, do not vary from a straight line bymore than 1/16 inch (1.5 mm) from one masonry unit to the next.

3.4 LAYING MASONRY WALLS

A. Lay out walls in advance for accurate spacing of surface bond patterns with uniform jointthicknesses 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, atother locations.

B. Bond Pattern for Exposed Masonry: Unless otherwise indicated, lay exposed masonry inrunning bond pattern unless indicated otherwise on Drawings; do not use units with less thannominal 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 lessthan 4-inches. Bond and interlock each course of each wythe at corners. Do not use units withless 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 incourse below; do not tooth. When resuming work, clean masonry surfaces that are to receivemortar, remove loose masonry units and mortar, and wet brick if required before laying freshmasonry.

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 ofmetal lath, wire mesh, or plastic mesh in the joint below and rod mortar or grout into core.

H. Fill cores in hollow CMUs with grout 16 inches under bearing plates, beams, lintels, posts, andsimilar items unless otherwise indicated.

I. Build non-load-bearing interior partitions full height of story to underside of solid floor or roofstructure above unless otherwise indicated.1. Install compressible filler in joint between top of partition and underside of structure above.2. Fasten partition top anchors to structure above and build into top of partition. Grout cells

of CMUs solidly around plastic tubes of anchors and push tubes down into grout to provide1/2-inch clearance between end of anchor rod and end of tube. Space anchors 48 incheso.c. unless otherwise indicated.

3. Wedge non-load-bearing partitions against structure above with small pieces of tile, slate,or metal. Fill joint with mortar after dead-load deflection of structure above approachesfinal position.

4. At fire-rated partitions, treat joint between top of partition and underside of structure aboveto comply with Division 07 Section "Fire-Resistive Joint Systems."

3.5 MORTAR BEDDING AND JOINTING

A. Lay hollow brick and CMUs as follows:1. With face shells fully bedded in mortar and with head joints of depth equal to bed joints.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 solid masonry units with completely filled bed and head joints; butter ends with sufficientmortar to fill head joints and shove into place. Do not deeply furrow bed joints or slush headjoints.

C. Tool exposed joints slightly concave when thumbprint hard, using a jointer larger than jointthickness unless otherwise indicated.1. For glazed masonry units, use a nonmetallic jointer 3/4 inch (19 mm) or more in width.

D. Cut joints flush for masonry walls to receive plaster or other direct-applied finishes (other thanpaint) unless otherwise indicated.

3.6 CAVITY WALLS

A. Bond wythes of cavity walls together using one of the following methods:1. Individual Metal Ties: Provide ties as shown installed in horizontal joints, but not less than

one metal tie for 4.5 sq. ft. (0.42 sq. m) of wall area spaced not to exceed 24 inches (610mm) o.c. horizontally and 16 inches (406 mm) o.c. vertically. Stagger ties in alternatecourses. Provide additional ties within 12 inches (305 mm) of openings and space notmore than 36 inches (915 mm) apart around perimeter of openings. At intersecting andabutting walls, provide ties at no more than 24 inches (610 mm) o.c. vertically.a. Where bed joints of wythes do not align, use adjustable (two-piece) type ties.b. Where one wythe is of clay masonry and the other of concrete masonry, use

adjustable (two-piece) type ties to allow for differential movement regardless ofwhether bed joints align.

2. Masonry Joint Reinforcement: Installed in horizontal mortar joints.


a. Where bed joints of both wythes align, use ladder-type reinforcement extendingacross both wythes.

b. Where bed joints of wythes do not align, use adjustable (two-piece) typereinforcement with continuous horizontal wire in facing wythe attached to ties.

3. Header Bonding: Provide masonry unit headers extending not less than 3 inches (76 mm)into each wythe. Space headers not over 12 inches clear horizontally and 16 inches clearvertically.

4. Masonry Veneer Anchors: Comply with requirements for anchoring masonry veneers.

B. Bond wythes of cavity walls together using bonding system indicated on Drawings.

C. Keep cavities clean of mortar droppings and other materials during construction. Bevel bedsaway from cavity, to minimize mortar protrusions into cavity. Do not attempt to trowel or removemortar fins protruding into cavity.

3.7 MASONRY JOINT REINFORCEMENT

A. General: Install entire length of longitudinal side rods in mortar with a minimum cover of 5/8inch 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 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.

3.8 ANCHORING MASONRY TO STRUCTURAL STEEL AND CONCRETE

A. Anchor masonry to structural steel and concrete where masonry abuts or faces structural steelor concrete to comply with the following:1. Provide an open space not less than 2 inches wide between masonry and structural steel

or concrete unless otherwise indicated. Keep open space free of mortar and other rigidmaterials.

2. Anchor masonry with anchors embedded in masonry joints and attached to structure.3. Space anchors as indicated, but not more than 24 inches o.c. vertically and 36 inches o.c.

horizontally.

3.9 ANCHORING MASONRY VENEERS

A. Anchor masonry veneers to concrete and masonry backup with masonry-veneer anchors tocomply with the following requirements:1. Fasten screw-attached anchors to concrete and masonry backup with metal fasteners of

type indicated. Use two fasteners unless anchor design only uses one fastener.2. Locate anchor sections to allow maximum vertical differential movement of ties up and

down.3. Space anchors as indicated, but not more than 18 inches (458 mm) o.c. vertically and 24

inches (610 mm) o.c. horizontally, with not less than 1 anchor for each 2 sq. ft. (0.2 sq. m)of wall area. Install additional anchors within 12 inches (305 mm) of openings and atintervals, not exceeding 8 inches (203 mm), around perimeter.


3.10 CAST STONE INSTALLATION

A. Mechanically anchor each cast stone unit.

B. Setting:1. Drench cast stone components with clear, running water immediately before installation.2. Set units in a full bed of mortar unless otherwise indicated.3. Fill vertical joints with mortar.4. Fill dowel holes and anchor slots completely with mortar or non-shrink grout.

C. Joints: Make all joints 3/8 inch, except as otherwise detailed.1. Rake mortar joints 3/4 inch for pointing. 2. Remove excess mortar from face of stone before pointing joints.3. Point joints with mortar in layers 3/8 inch thick and tool to a slight concave profile.4. Leave the following joints open for sealant:

a. Head joints in top courses, including copings, parapets, cornices, sills, and steps.b. Joints in projecting units.c. Joints between rigidly anchored units, including soffits, panels, and column covers.d. Joints below lugged sills and stair treads.e. Joints below ledge and relieving angles.f. Joints labeled "expansion joint".

D. Sealant Joints: Install sealants as specified in Section 07 9005.

E. Installation Tolerances:1. Variation from Plumb: Not more than 1/8 inch in 10 feet or 1/4 inch in 20 feet or more.2. Variation from Level: Not more than 1/8 inch in 10 feet or 1/4 inch in 20 feet, or 3/8 inch

maximum.3. Variation in Joint Width: Not more than 1/8 inch in 36 inches or 1/4 of nominal joint width,

whichever is less.4. Variation in Plane Between Adjacent Surfaces (Lipping): Not more than 1/16 inch

difference between planes of adjacent units or adjacent surfaces indicated to be flush withunits.

F. Repairs: Repair chips and other surface damage noticeable when viewed in direct daylight at20 feet.1. Repair with matching touchup material provided by the manufacturer and in accordance

with manufacturer's instructions.2. Repair methods and results subject to Architect 's approval.

3.11 CONTROL AND EXPANSION JOINTS

A. General: Install control and expansion joint materials in unit masonry as masonry progresses. Do not allow materials to span control and expansion joints without provision to allow forin-plane wall or partition movement.

B. Form control joints in concrete masonry using one of the following methods:1. Fit bond-breaker strips into hollow contour in ends of CMUs 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.


5. Do not locate control joints at or within four feet of opening jambs.

C. Form expansion joints in brick as follows:1. Build flanges of metal expansion strips into masonry. Lap each joint 4 inches (100 mm) in

direction of water flow. Seal joints below grade and at junctures with horizontal expansionjoints if any.

2. Build flanges of factory-fabricated, expansion-joint units into masonry.3. Build in compressible joint fillers where indicated.4. Form open joint full depth of brick wythe and of width indicated, but not less than 3/8 inch

(10 mm) for installation of sealant and backer rod specified in Division 07 Section "JointSealants."

D. Provide horizontal, pressure-relieving joints by either leaving an air space or inserting acompressible filler of width required for installing sealant and backer rod specified in Division 07Section "Joint Sealants," but not less than 3/8 inch (10 mm).1. Locate horizontal, pressure-relieving joints beneath shelf angles supporting masonry.

3.12 FLASHING, WEEP HOLES, CAVITY DRAINAGE, AND VENTS

A. General: Install embedded flashing and weep holes in masonry at shelf angles, lintels, ledges,other obstructions to downward flow of water in wall, and where indicated. Install vents at shelfangles, ledges, and other obstructions to upward flow of air in cavities, and where indicated.

B. Install flashing as follows unless otherwise indicated:1. 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 onsloping bed of mortar and cover with mortar. Before covering with mortar, sealpenetrations in flashing with adhesive, sealant, or tape as recommended by flashingmanufacturer.

2. At multiwythe masonry walls, including cavity walls, extend flashing through outer wythe,turned up a minimum of 8 inches (200 mm), and through inner wythe to within 1/2 inch (13mm) of the interior face of wall in exposed masonry. Where interior face of wall is toreceive furring or framing, carry flashing completely through inner wythe and turn flashingup approximately 2 inches (50 mm) on interior face.

3. At multiwythe masonry walls, including cavity walls, extend flashing through outer wythe,turned up a minimum of 8 inches (200 mm), and install continuous termination bar overflashing face; fasten to masonry surface at top with headed fasteners at 16" OC. Installcontinuous bead of sealant at top of termination bar.

4. At masonry-veneer walls, extend flashing through veneer, across air space behind veneer,and up face of sheathing at least 8 inches (200 mm); with upper edge tucked underbuilding paper or building wrap, lapping at least 4 inches (100 mm).

5. At lintels and shelf angles, extend flashing a minimum of 6 inches (150 mm) into masonryat each end. At heads and sills, extend flashing 6 inches (150 mm) at ends and turn upnot less than 2 inches (50 mm) to form end dams.

6. Interlock end joints of ribbed sheet metal flashing by overlapping ribs not less than 1-1/2inches (38 mm) or as recommended by flashing manufacturer, and seal lap withelastomeric sealant complying with requirements in Division 07 Section "Joint Sealants" forapplication indicated.

7. Install metal drip edges beneath flexible flashing at exterior face of wall. Stop flexibleflashing 1/2 inch (13 mm) back from outside face of wall and adhere flexible flashing to topof metal drip edge

C. Install single-wythe CMU flashing system in bed joints of CMU walls where indicated to complywith manufacturer's written instructions. Install CMU cell pans with upturned edges locatedbelow face shells and webs of CMUs above and with weep spouts aligned with face of wall.


Install CMU web covers so that they cover upturned edges of CMU cell pans at CMU webs andextend from face shell to face shell.

D. Install reglets and nailers for flashing and other related construction where they are shown to bebuilt into masonry.

E. Install weep holes in head joints in exterior wythes of first course of masonry immediately aboveembedded flashing and as follows:1. Use specified weep/vent products to form weep holes.2. Space weep holes 16 inches (400 mm) o.c.

F. Place cavity drainage material in cavities to comply with configuration requirements for cavitydrainage material in "Miscellaneous Masonry Accessories" Article.

G. Install vents in head joints in exterior wythes at spacing indicated. Use specified weep/ventproducts to form vents.1. Close cavities off vertically and horizontally with blocking in manner indicated. Install

through-wall flashing and weep holes above horizontal blocking.

3.13 REINFORCED UNIT MASONRY INSTALLATION

A. Temporary Formwork and Shores: Construct formwork and shores as needed to supportreinforced 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 ofreinforced masonry.

2. Do not remove forms and shores until reinforced masonry members have hardenedsufficiently to carry their own weight and other loads that may be placed on them duringconstruction.

B. Placing Reinforcement: Comply with requirements in ACI 530.1/ASCE 6/TMS 602.1. Lap reinforement as indicated on the structural drawings.

C. Grouting: Do not place grout until entire height of masonry to be grouted has attained enoughstrength to resist grout pressure and vertical reinforcement has been inspected and approved.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 48 inches.

3.14 FIELD QUALITY CONTROL

A. Testing and Inspecting: Owner will engage special inspectors to perform tests and inspectionsand prepare reports. Allow inspectors access to scaffolding and work areas, as needed toperform tests and inspections. Retesting of materials that fail to comply with specifiedrequirements shall be done at Contractor's expense.

B. Inspections: Special inspections according to the International Building Code 2012 and theinspection tables indicated on structural drawings.1. Begin masonry construction only after inspectors have verified proportions of site-prepared

mortar.2. Place grout only after inspectors have verified compliance of grout spaces and of grades,

sizes, laps, and locations of reinforcement.3. Place grout only after inspectors have verified proportions of site-prepared grout.4. Inspect all masonry vertical reinforcement.


C. Testing Prior to Construction: One set of tests.

D. Testing Frequency: One set of tests for each 1500 sq. ft. (464 sq. m) of wall area or portionthereof.

E. Clay Masonry Unit Test: For each type of unit provided, according to ASTM C 67 forcompressive strength.

F. Concrete Masonry Unit Test: For each type of unit provided, according to ASTM C 140 forcompressive strength.

G. Mortar Aggregate Ratio Test (Proportion Specification): For each mix provided, according toASTM C 780.

H. Mortar Test (Property Specification): For each mix provided, according to ASTM C 780. Testmortar for mortar air content and compressive strength.

I. Grout Test (Compressive Strength): For each mix provided, according to ASTM C 1019.

3.15 PROTECTION

A. Without damaging completed work, provide protective boards at exposed external corners thatare subject to damage by construction activities.

B. Protect top of walls and cavities from damage and debris infiltration.

3.16 REPAIRING, POINTING, AND CLEANING

A. Remove and replace masonry units that are loose, chipped, broken, stained, or otherwisedamaged or that do not match adjoining units. Install new units to match adjoining units; installin fresh mortar, pointed to eliminate evidence of replacement.

B. In-Progress Cleaning: Clean unit masonry as work progresses by dry brushing to removemortar fins and smears before tooling joints.

C. 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. Protect adjacent stone and non-masonry surfaces from contact with cleaner by covering

them with liquid strippable masking agent or polyethylene film and waterproof maskingtape.

3. Wet wall surfaces with water before applying cleaners; remove cleaners promptly byrinsing surfaces thoroughly with clear water.

4. Clean brick by bucket-and-brush hand-cleaning method described in BIA Technical Notes20.

5. Clean masonry with a proprietary acidic cleaner applied according to manufacturer'swritten instructions.

6. Clean concrete masonry by cleaning method indicated in NCMA TEK 8-2A applicable totype of stain on exposed surfaces.

7. Clean stone trim to comply with stone supplier's written instructions.

3.17 MASONRY WASTE DISPOSAL

A. Salvageable Materials: Unless otherwise indicated, excess masonry materials are Contractor'sproperty. At completion of unit masonry work, remove from Project site.


B. Waste Disposal as Fill Material: Dispose of clean masonry waste, including excess orsoil-contaminated sand, waste mortar, and broken masonry units, by crushing and mixing withfill material as fill is placed.1. Crush masonry waste to less than 4 inches (100 mm) in each dimension.2. Mix masonry waste with at least two parts of specified fill material for each part of masonry

waste. Fill material is specified in Division 31 Section "Excavating and Filling."3. Do not dispose of masonry waste as fill within 18 inches (450 mm) of finished grade.

C. Excess Masonry Waste: Remove excess clean masonry waste that cannot be used as fill, asdescribed above, and other masonry waste, and legally dispose of off Owner's property.

END OF SECTION

GWWO Project No. 1323 © 2015 GWWO, Inc. Frederick High School Replacement SOUND ABSORPTIVE CONCRETE MASONRY Issued for BID DOCUMENTS - 02/09/2015 04 2223 - 1

SECTION 04 2223 - SOUND ABSORPTIVE CONCRETE UNIT MASONRY

PART 1 GENERAL

1.1 GENERAL REQUIREMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.2 WORK INCLUDED

A. Work of this Section includes all labor, materials, equipment, and services necessary to furnish and install Sound Absorptive Concrete Unit Masonry as shown on the Drawings and specified herein.

1.3 SUBMITTALS

A. Product Data: For each type of acoustic block indicated, include block designation, model, aggregate description, acoustic fill, construction details, label compliance, compressive strength, sound and fire-resistance ratings.

B. Samples: Submit three (3) sets of Manufacturer’s standard size product samples for each acoustic block type to be provided. Samples shall be representative of the aggregate, cell and slot size, and acoustic fill.

C. Shop Drawings showing the following:

D. Locations and dimensions of acoustic block and matching left and right handed block where needed for reinforcement.

E. Construction details including block, cell, and slot dimensions for each acoustic block type.

F. Details of reinforcement, coursing, anchorage, and mounting hardware.

G. Acoustic Block Schedule: Listing of acoustic block using the same reference numbers for acoustic block as those shown on the Contract Documents.

H. Comparison Schedule: Listing of acoustic performance in these Specifications with acoustic performance of proposed acoustic block if different than specified herein.

I. Acoustic Test Reports: Certified copies of 1/1 octave band Sound Absorption Coefficient and Noise Reduction Coefficient (NRC) and Sound Transmission Class (STC) ratings issued from an accredited independent acoustic laboratory. NRC and STC ratings shall be assigned to specific acoustic block type as shown on the Acoustic Block Schedule.

J. Fire Rating Test Reports: Certified copies of fire rating tests for acoustic block.

K. Compressive Strength Test Reports: Certified copies of compressive strength tests for acoustic block.

L. Mortar: Description of type and proportions of ingredients.

M. Reinforcement: Description of type of prefabricated reinforcement components.



A. Manufacturer Experience: The Manufacturer of the acoustic block shall have a minimum five (5) years experience in the fabrication of acoustic block similar to those described in these Specifications.

B. Single-Source Responsibility: For a given acoustic block type obtain from one source and by a single manufacturer.

C. Acoustic Testing Requirements: Submitted acoustic block shall be tested in an accredited independent acoustic testing laboratory having NVLAP accreditation. Sound absorption (α) values in each 1/1 octave band from 125 Hz to 4,000 Hz shall be determined in accordance with ASTM C423 using type “A” mounting per ASTM E795. Sound transmission values in each 1/3 octave band from 125 Hz to 4,000 Hz shall be determined in accordance with ASTM E90 and ASTM E413.

D. Fire Rating Testing Requirements: Submitted acoustic block shall be tested in an accredited independent fire testing laboratory having NVLAP accreditation. Fire rating testing shall be determined in accordance with ASTM E84 or UBC42-2 on the entire block assembly and not individual component parts.

E. Compressive Strength Testing Requirements: Submitted acoustic block shall be tested in an accredited independent structural testing laboratory having NVLAP accreditation. Compressive strength rating testing shall be determined in accordance with ASTM C90.

F. Mock-ups: Construct for inspection one full-size mock-up assembly at the jobsite comprising acoustic block to be installed at that location. The mock-up can be left in place as part of the completed Work if accepted by the Architect.


A. Delivery: Deliver acoustic block cardboard-wrapped or crated to provide protection during transit and job storage.

B. Site Storage: Store acoustic block at the building site under cover and away from sources of moisture. Place acoustic block on minimum 4 inch high wood blocking. Provide minimum ¼ inch spacers between stacked acoustic block to permit air circulation. Avoid using non-vented plastic or canvas shelters that could create a humidity chamber. If packaging becomes wet, immediately remove acoustic block from cartons.

C. Thermal Conditions: The temperature and humidity conditions within the storage area shall not be lower than 45°F and 20 percent relative humidity or higher than 90°F and 80 percent relative humidity.

1.6 WARRANTY

A. General: Warranties specified herein shall not deprive the Owner of other rights covered by other provisions of the Contract Documents and will be in addition to, and run concurrent with, other warranties made by the Contractors under requirements of the Contract Documents.

B. Warranty Period: Manufacturer’s standard warranty but not less than 2 years after date of Substantial Completion.


PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Available Manufacturers: Subject to compliance with requirements, Manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: 1. Proudfoot Company, Monroe, CT 800-445-0034 2. Trenwyth Industries, Emigsville, PA 800-233-1924

2.2 GENERAL

A. Product Assemblies: Provide complete acoustic block assemblies capable of providing broadband uniform sound absorption suitable for wall installation complying with ACI 530 and ASTM C90.

B. Fabrication: Construct acoustic block in Manufacturer’s plant in accordance with approved Shop Drawings. Acoustic block shall be square, rigid, neat in appearance, and free of defects including chips, cracks, and irregular moldings to include non-straight slots or slots with improper shaped flare.

C. Fire Rating: All acoustic block shall have a Class “A” rating when tested in accordance with ASTM E84.

2.3 AGGREGATE

A. Aggregate: The acoustic block shall be fabricated from cement aggregate approved by the Manufacturer and shall conform to either ASTM C90 or ASTM C129 with a minimum 60 percent solid fill content.

B. Compressive Strength: Per ASTM C90, Grade N Type 1, with net compressive strength of minimum 1900 psi.

C. Density Classification: Normal weight.

2.4 ACOUSTIC CORES

A. Broadband Sound Absorption Core Material: Manufacturer’s standard construction 1.5 lb/ft3 density unfaced fiberglass batts with factory laminated foil metal septum. Compressive strength shall exceed 100 lb/ft2 when tested in accordance with ASTM C165. Fiberglass material shall conform to ASTM C612. Acoustic cores shall be plastic wrapped for exterior use.

2.5 ACOUSTIC BLOCK CONSTRUCTION

A. Fabrication: The acoustic block shall be made using molds prepared and licensed by the Manufacturer based on standard CMU block sizes. One face of the block shall have a vertical slot in each of two block cavities. Slots and edges shall be straight and smooth. The slot profile shall be funnel-shaped that widens towards the inside of the block cavity. The opposite block face and sides shall be completely sealed and the bottom and top of the block open.

B. Reinforcement: Integral hollow cavities shall be behind the front cavities for reinforcing with grout or rebar.

C. Handing: The acoustic block shall be provided with matching left and right hand geometries as required for block coursing and reinforcement even if not fully shown on the Drawings.


2.6 REINFORCED ACOUSTIC BLOCK (042000-S1)

A. Acoustic Performance: The acoustic block shall have ratings not less than NRC 0.50, 125 Hz α 0.12, and STC 53 (8 inch block thickness) and NRC 0.45, 125 Hz α 0.95, and STC 56 (12 inch block thickness) for the scheduled acoustic block.

B. Fabrication: Cement aggregate CMU with minimum 60 percent solid fill content with hollow cavities having a narrow funnel-shaped slot at the front of each cavity and hollow cavities behind for reinforcing.

C. Block sizes shall be within ± 1/8 inch of specified sizes.

D. Size: Eight by 8 by 16 inches and 12 by 8 by 16 inches.

E. Basis of Design: Proudfoot Company “Soundblox 8 inch Type A-1/RF” and “Soundblox 12 inch Type A-1/RF”.

2.7 NON-REINFORCED ACOUSTIC BLOCK (042000-S2)

A. Acoustic Performance: The acoustic block shall have ratings not less than NRC 0.80, 125 Hz α 0.48, and STC 53 (8 inch block thickness) for the scheduled acoustic block.

B. Fabrication: Cement aggregate CMU with minimum 60 percent solid fill content with hollow cavities having a narrow funnel-shaped slot at the front of each cavity and hollow cavities behind for reinforcing. The plastic wrapped acoustic core shall be cut accurately to size and installed in the front cavities with the septa facing away from the slots.

C. Block sizes shall be within ± 1/8 inch of specified sizes.

D. Size: Sixteen by 8 by 8 inches.

E. Basis of Design: Proudfoot Company “Soundblox 8 inch Type RSC”.

2.8 MORTAR

A. Aggregate for Mortar: Comply with ASTM C144 comprising washed aggregate consisting of natural sand or crushed stone.

2.9 REINFORCEMENT

A. Reinforcement for Masonry: Comply with ASTM A951 for hot-dipped galvanized carbon steel prefabricated components.

PART 3 EXECUTION

3.1 GENERAL

A. General: Install acoustic block in accordance with Manufacturer’s instructions and referenced quality standards as indicated herein.

B. Inspection: Prior to installation, carefully inspect the installed Work of other Trades and verify it is complete to the point where the acoustic block can be installed in complete accordance with the original design and the approved Shop Drawings. In the event of discrepancy, immediately notify the Architect in writing.


3.2 PREPARATION

A. Surface Preparation: Remove loose aggregate or other material that would prevent mortar from bonding to the foundation.

B. Foundations: Verify foundations are constructed with tolerances conforming to ACI 117 and reinforcing dowels are positioned in accordance with approved Shop Drawings.

3.3 INSTALLATION

A. Installation: Install acoustic block in locations shown on approved Shop Drawings.

B. Placement: Place acoustic block to lines and levels indicated. Maintain courses to uniform width with the open ends of the slotted cavities facing downward and towards the noise source or room interior.

C. Bond Pattern: Lay the acoustic block in a half running bond pattern.

D. Mortar: Set the block in a full bed of mortar. Make horizontal and vertical joints equal and of uniform thickness. Tool head and bed joints concave. Keep cavity air space, weep holes, and acoustic block slots free of mortar.

E. Reinforcement: Place reinforcement and anchorages in accordance with the sizes, types, and locations indicated on approved Shop Drawings. Embed ends of wall ties in mortar joints at least ½ inch into outer face of the wall.

F. Cutting: Cut acoustic block at the job site using power tools in a manner to provide straight and true edges. Do not install chipped or broken block.

G. Acoustic Cores: Install acoustic cores in front block cavities with metal septum facing towards the back of the cavities.

H. In-Progress Cleaning: Remove excess mortar by hand with wooden paddles and non-metallic scrape hoes or chisels Dry brush exposed masonry prior to the end of each workday.

3.4 PAINTING

A. Painting: Paint acoustic block where indicated on the Drawings or finish schedules using a primer coat followed by two heavy coats of colored paint.

3.5 CLEANING AND PROTECTION

A. Defective Materials: Replace defective or improperly installed materials that cannot be satisfactorily corrected with new materials to the satisfaction of the Architect.

B. Work Area: Upon completion of the Work, remove from the building site all debris, unused materials, equipment, and leave the work area in a clean, acceptable condition.

C. Final Cleaning: Clean and remove dust, dirt, and other contaminants from the acoustic block prior to final acceptance by the Architect.

D. Protective Coverings: Provide protective plastic wrapping on acoustic block if additional Work is to occur in the area that might soil or damage the acoustic block. Remove such wrapping prior to Substantial Completion.


3.6 INSPECTION

A. General: The Architect shall inspect the acoustic block for proper installation. A letter shall be issued to the Contactor identifying Work that needs to be corrected.

B. Defective Work: Remove and replace defective or soiled Work with new materials, including repointing mortar that is unacceptable.

3.7 MAINTENANCE

A. Owner Training: Provide training and maintenance instructions to the Owner to include cleaning the acoustic block.

END OF SECTION