DRAFT_CEAC_100 Specs_Volume 2 of 4_Edited_20200511.pdf

U.S. Army Corps of Engineers New York District

Section 04 20 00 Section 12 93 00

Unit Masonry through Site Furnishings

Contract #: W912-DS-17-D0007 Task Order #: W912DS-18-F-0016

UNCLASSIFIED / FOUO

SPECIFICATIONS

Cyber & Engineering Academic Center United States Military Academy West Point, NY

May 11, 2020

100% Submission

Volume 2 of 4 jyost Rectangle

Cyber & Engineering Center and Parking Structure August 14, 2019 West Point Military Academy, West Point, NY 100% Submission

PROJECT TABLE OF CONTENTS

DIVISION 00 - PROCUREMENT AND CONTRACTING REQUIREMENTS

00 75 95 ROOF SYSTEM 20-YEAR DIAGNOSTICS / PERFORMANCE WARRANTY

DIVISION 01 - GENERAL REQUIREMENTS

01 11 00 SUMMARY OF WORK

01 14 00 WORK RESTRICTIONS

01 22 00.00 10 PRICE AND PAYMENT PROCEDURES

01 30 00 ADMINISTRATIVE REQUIREMENTS

01 32 01.00 10 PROJECT SCHEDULE

01 32 33 PHOTOGRAPHIC DOCUMENTATION

01 33 00 SUBMITTAL PROCEDURES

01 33 29 SUSTAINABILITY REPORTING

01 35 26 GOVERNMENTAL SAFETY REQUIREMENTS

01 35 91 HISTORIC TREATMENT PROCEDURES

01 42 00 SOURCES FOR REFERENCE PUBLICATIONS

01 45 00.00 10 QUALITY CONTROL

01 45 00.15 10 RESIDENT MANAGEMENT SYSTEM CONTRACTOR MODE (RMS CM)

01 45 20.00 18 TESTING FOR MECHANICAL AND ELECTRICAL SYSTEMS

01 45 35 SPECIAL INSPECTIONS

01 50 00 TEMPORARY CONSTRUCTION FACILITIES AND CONTROLS

01 57 19 TEMPORARY ENVIRONMENTAL CONTROLS

01 58 00 PROJECT IDENTIFICATION

01 74 19 CONSTRUCTION AND DEMOLITION WASTE MANAGEMENT

01 78 00 CLOSEOUT SUBMITTALS (WEST POINT)

01 78 23 OPERATION AND MAINTENANCE DATA

01 78 24.00 10 FACILITY DATA REQUIREMENTS

01 91 00.15 TOTAL BUILDING COMMISSIONING

01 91 00.20 CRANE COMMISSIONING

DIVISION 02 - EXISTING CONDITIONS

02 41 00 DEMOLITION

02 81 00 TRANSPORTATION AND DISPOSAL OF HAZARDOUS MATERIALS

02 82 13.00 10 ASBESTOS ABATEMENT

02 82 16.00 20 ENGINEERING CONTROL OF ASBESTOS CONTAINING MATERIALS

02 82 33.13 20 REMOVAL/CONTROL AND DISPOSAL OF PAINT WITH LEAD

02 83 13.00 20 LEAD IN CONSTRUCTION

DIVISION 03 - CONCRETE

03 11 13.00 10 STRUCTURAL CAST-IN-PLACE CONCRETE FORMING

03 15 00.00 10 CONCRETE ACCESSORIES

03 20 00.00 10 CONCRETE REINFORCING

03 23 00 STRESSED TENDON REINFORCING

03 30 00.00 10 CAST-IN-PLACE CONCRETE

03 35 00.00 10 CONCRETE FINISHING

03 39 00.00 10 CONCRETE CURING

03 42 13.00 10 PLANT-PRECAST CONCRETE PRODUCTS FOR BELOW GRADE

PROJECT TABLE OF CONTENTS Page 1

CONSTRUCTION

03 45 00 PRECAST ARCHITECTURAL CONCRETE

DI VI SI ON 04 - MASONRY

04 20 00 UNIT MASONRY

DI VI SI ON 05 - METALS

05 05 23.13 10 ULTRASONIC INSPECTION OF WELDMENTS

05 12 00 STRUCTURAL STEEL

05 21 00 STEEL JOIST FRAMING

05 30 00 STEEL DECKS

05 40 00 COLD-FORMED METAL FRAMING

05 43 00 METAL STRUT FRAMING AND ALUMINUM T-SLOT FRAMING

05 50 13 MISCELLANEOUS METAL FABRICATIONS

05 51 00 METAL STAIRS

05 51 33 METAL LADDERS

05 52 00 METAL RAILINGS

05 72 00 DECORATIVE METAL SPECIALTIES

05 72 11 ARCHITECTURAL ORNAMENTAL GLASS RAILINGS

DI VI SI ON 06 - WOOD, PLASTI CS, AND COMPOSI TES

06 10 00 ROUGH CARPENTRY

06 20 00 FINISH CARPENTRY

06 41 16.00 10 PLASTIC-LAMINATE-CLAD ARCHITECTURAL CABINETS

06 61 16 SOLID SURFACING FABRICATIONS

DI VI SI ON 07 - THERMAL AND MOI STURE PROTECTI ON

07 05 23 PRESSURE TESTING AN AIR BARRIER SYSTEM FOR AIR TIGHTNESS

07 13 53 ELASTOMERIC SHEET WATERPROOFING

07 21 13 BOARD AND BLOCK INSULATION

07 21 16 MINERAL FIBER BLANKET INSULATION

07 21 23 ACOUSTICAL SPRAY CELLULOSE

07 22 00 ROOF AND DECK INSULATION

07 27 10.00 10 BUILDING AIR BARRIER SYSTEM

07 27 26 FLUID-APPLIED MEMBRANE AIR BARRIERS

07 42 63 FABRICATED WALL PANEL ASSEMBLIES

07 52 00 MODIFIED BITUMINOUS MEMBRANE ROOFING

07 60 00 FLASHING AND SHEET METAL

07 81 00 SPRAY-APPLIED FIREPROOFING

07 84 00 FIRESTOPPING

07 92 00 JOINT SEALANTS

DI VI SI ON 08 - OPENI NGS

08 11 13 STEEL DOORS AND FRAMES

08 11 16 ALUMINUM DOORS AND FRAMES

08 13 76 BI-FOLDING METAL DOORS

08 14 00 WOOD DOORS

08 31 00 ACCESS DOORS AND PANELS

08 33 13 COILING COUNTER DOORS

08 33 23 OVERHEAD COILING DOORS

08 34 73 SOUND CONTROL DOOR ASSEMBLIES

08 41 13 ALUMINUM-FRAMED ENTRANCES AND STOREFRONTS

08 44 00 CURTAIN WALL AND GLAZED ASSEMBLIES

08 51 13 ACOUSTICAL ALUMINUM WINDOWS

PROJECT TABLE OF CONTENTS Page 2

08 51 23 STEEL WINDOWS

08 60 45 SKYLIGHTS

08 71 00 DOOR HARDWARE

08 81 00 GLAZING

08 91 00 METAL WALL LOUVERS

DI VI SI ON 09 - FI NI SHES

09 22 00 SUPPORTS FOR PLASTER AND GYPSUM BOARD

09 29 00 GYPSUM BOARD

09 30 10 CERAMIC, QUARRY, AND GLASS TILING

09 51 00 ACOUSTICAL CEILINGS

09 62 38 STATIC-CONTROL FLOORING

09 65 00 RESILIENT FLOORING

09 66 23 RESINOUS MATRIX TERRAZZO FLOORING

09 67 23.14 CHEMICAL RESISTANT RESINOUS FLOORING

09 68 00 CARPETING

09 69 13 RIGID GRID ACCESS FLOORING

09 84 20 ACOUSTICAL WALL PANELS

09 90 00 PAINTS AND COATINGS

09 96 00 HIGH-PERFORMANCE COATINGS

DI VI SI ON 10 - SPECI ALTI ES

10 11 00 VISUAL DISPLAY UNITS

10 14 00.10 EXTERIOR SIGNAGE

10 14 00.20 INTERIOR SIGNAGE

10 21 13 TOILET COMPARTMENTS

10 22 39 FOLDING PANEL PARTITIONS (VERTICALLY RETRACTABLE

ACOUSTICAL WALLS)

10 22 43 SLIDING PARTITIONS

10 26 00 WALL AND DOOR PROTECTION

10 28 13 TOILET ACCESSORIES

10 44 16 FIRE EXTINGUISHERS

10 52 00 AUTOMATIC FIRE PROTECTIVE SMOKE CURTAINS

DI VI SI ON 11 - EQUI PMENT

11 11 37 ELECTRIC VEHICLE SUPPLY EQUIPMENT

11 12 00 PARKING CONTROL EQUIPMENT

11 13 19.13 LOADING DOCK LEVELERS

11 53 00 LABORATORY EQUIPMENT AND FUMEHOODS

DI VI SI ON 12 - FURNI SHI NGS

12 22 00 CURTAINS AND DRAPES

12 24 13 ROLLER WINDOW SHADES

12 31 00 MANUFACTURED METAL CASEWORK

12 36 00 COUNTERTOPS

12 48 13 ENTRANCE FLOOR MATS AND FRAMES

12 93 00 SITE FURNISHINGS

DI VI SI ON 13 - SPECI AL CONSTRUCTI ON

13 21 48 ACOUSTIC ISOLATION CONSTRUCTION

DI VI SI ON 14 - CONVEYI NG EQUI PMENT

14 21 23 ELECTRIC TRACTION PASSENGER ELEVATORS

PROJECT TABLE OF CONTENTS Page 3

14 24 13 HYDRAULIC FREIGHT ELEVATORS

14 24 23 HYDRAULIC PASSENGER ELEVATORS

DI VI SI ON 21 - FI RE SUPPRESSI ON

21 12 00 STANDPIPE SYSTEMS

21 13 13.00 10 WET PIPE SPRINKLER SYSTEM, FIRE PROTECTION

21 13 17.00 10 DRY PIPE SPRINKLER SYSTEM, FIRE PROTECTION

21 13 18.00 10 PREACTION AND DELUGE SPRINKLER SYSTEMS, FIRE PROTECTION

21 22 00.00 40 CLEAN AGENT FIRE EXTINGUISHING SYSTEMS

21 30 00 FIRE PUMPS

DI VI SI ON 22 - PLUMBI NG

22 05 48.00 20 MECHANICAL SOUND, VIBRATION, AND SEISMIC CONTROL

22 07 19.00 40 PLUMBING PIPING INSULATION

22 14 29.00 40 SUMP PUMPS

22 15 09.00 40 GENERAL SERVICE COMPRESSED-AIR SYSTEMS CLEANING PROCEDURES

22 31 00 WATER SOFTENERS, CATION-EXCHANGE (SODIUM CYCLE)

DI VI SI ON 23 - HEATI NG, VENTI LATI NG, AND AI R CONDI TI ONI NG ( HVAC)

23 00 00 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEMS

23 05 48.00 40 VIBRATION AND SEISMIC CONTROLS FOR HVAC PIPING AND

EQUIPMENT

23 05 93 TESTING, ADJUSTING, AND BALANCING FOR HVAC

23 07 00 THERMAL INSULATION FOR MECHANICAL SYSTEMS

23 09 00 INSTRUMENTATION AND CONTROL FOR HVAC

23 09 13 INSTRUMENTATION AND CONTROL DEVICES FOR HVAC

23 09 23.01 LONWORKS DIRECT DIGITAL CONTROL FOR HVAC AND OTHER

BUILDING CONTROL SYSTEMS

23 11 25 FACILITY GAS PIPING

23 21 23 HYDRONIC PUMPS

23 25 00 CHEMICAL TREATMENT OF WATER FOR MECHANICAL SYSTEMS

23 52 00 HEATING BOILERS

23 64 10 WATER CHILLERS, VAPOR COMPRESSION TYPE

23 64 26 CHILLED AND CONDENSER WATER PIPING SYSTEMS

23 65 00 COOLING TOWERS

23 81 00.00 20 UNITARY AIR CONDITIONING EQUIPMENT

23 81 23.00 20 COMPUTER ROOM AIR CONDITIONING UNITS

23 83 16 RADIANT-HEATING HYDRONIC PIPING

DI VI SI ON 25 - I NTEGRATED AUTOMATI ON

25 05 11 CYBERSECURITY FOR FACILITY-RELATED CONTROL SYSTEMS

25 10 10 UTILITY MONITORING AND CONTROL SYSTEM (UMCS) FRONT END

AND INTEGRATION

DI VI SI ON 26 - ELECTRI CAL

26 00 00.00 20 BASIC ELECTRICAL MATERIALS AND METHODS

26 08 00 APPARATUS INSPECTION AND TESTING

26 09 13 POWER MONITORING SYSTEM

26 09 43 DIGITAL-NETWORK LIGHTING CONTROLS

26 20 00 INTERIOR DISTRIBUTION SYSTEM

26 24 13 SWITCHBOARDS

26 28 01.00 10 COORDINATED POWER SYSTEM PROTECTION

26 29 23 VARIABLE FREQUENCY DRIVE SYSTEMS UNDER 600 VOLTS

26 32 15.00 10 DIESEL-GENERATOR SET STATIONARY 100-2500 KW, WITH

PROJECT TABLE OF CONTENTS Page 4

AUXILIARIES

26 32 33.00 10 UNINTERRUPTIBLE POWER SUPPLY (UPS) SYSTEM ABOVE 15 KVA

CAPACITY

26 36 00.00 10 AUTOMATIC TRANSFER SWITCHES

26 41 00 LIGHTNING PROTECTION SYSTEM

26 51 00 INTERIOR LIGHTING

26 56 00 EXTERIOR LIGHTING

DI VI SI ON 27 - COMMUNI CATI ONS

27 05 14.00 10 DISTRIBUTED ANTENNA SYSTEM (DAS)

27 05 28.36 40 CABLE TRAYS FOR COMMUNICATIONS SYSTEMS

27 10 00 BUILDING TELECOMMUNICATIONS CABLING SYSTEM

27 51 16 PUBLIC ADDRESS SYSTEMS

DI VI SI ON 28 - ELECTRONI C SAFETY AND SECURI TY

28 31 76 INTERIOR FIRE ALARM AND MASS NOTIFICATION SYSTEM

DI VI SI ON 31 - EARTHWORK

31 00 00 EARTHWORK

31 05 19 GEOTEXTILE

31 09 13 MONITORING DURING CONSTRUCTION

31 11 00 CLEARING AND GRUBBING

31 21 13 RADON MITIGATION

31 31 16.13 CHEMICAL TERMITE CONTROL

31 31 16.19 TERMITE CONTROL BARRIERS

31 32 11 SOIL SURFACE EROSION CONTROL

31 62 20.50 MICROPILES

31 68 13 SOIL AND ROCK ANCHORS

DI VI SI ON 32 - EXTERI OR I MPROVEMENTS

32 05 33 LANDSCAPE ESTABLISHMENT

32 11 23 AGGREGATE BASE COURSES

32 11 23.23 BASE COURSE DRAINAGE LAYERS

32 12 13 BITUMINOUS TACK AND PRIME COATS

32 12 16 HOT-MIX ASPHALT (HMA) FOR ROADS

32 16 13 CONCRETE SIDEWALKS AND CURBS AND GUTTERS

32 16 15 CONCRETE BLOCK PAVEMENTS

32 17 23 PAVEMENT MARKINGS

32 31 13 CHAIN LINK FENCES AND GATES

32 32 23 SEGMENTAL CONCRETE BLOCK RETAINING WALL

32 92 19 SEEDING

32 92 23 SODDING

32 93 00 EXTERIOR PLANTS

DI VI SI ON 33 - UTI LI TI ES

33 01 30.16 TV INSPECTION OF SEWER PIPELINES

33 01 30.72 RELINING SEWERS

33 05 23 TRENCHLESS UTILITY INSTALLATION

33 30 00 SANITARY SEWERAGE

33 40 00 STORM DRAINAGE UTILITIES

33 51 15 NATURAL-GAS / LIQUID PETROLEUM GAS DISTRIBUTION

33 71 02 UNDERGROUND ELECTRICAL DISTRIBUTION

33 82 00 TELECOMMUNICATIONS OUTSIDE PLANT (OSP)

PROJECT TABLE OF CONTENTS Page 5

DI VI SI ON 34 - TRANSPORTATI ON

34 71 13.16 BARRIER CABLE SYSTEM

DI VI SI ON 41 - MATERI AL PROCESSI NG AND HANDLI NG EQUI PMENT

41 22 13.14 BRIDGE CRANES, OVERHEAD ELECTRIC, TOP RUNNING

-- End of Project Table of Contents --

PROJECT TABLE OF CONTENTS Page 6

SECTION 04 20 00

UNIT MASONRY

11/15

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN CONCRETE INSTITUTE INTERNATIONAL (ACI)

ACI 216.1 (2014) Code Requirements for Determining Fire Resistance of Concrete and Masonry Construction Assemblies

ACI SP-66 (2004) ACI Detailing Manual

ASTM INTERNATIONAL (ASTM)

ASTM A1008/A1008M (2016) Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, Solution Hardened, and Bake Hardenable

ASTM A1064/A1064M (2017) Standard Specification for Carbon-Steel Wire and Welded Wire Reinforcement, Plain and Deformed, for Concrete

ASTM A153/A153M (2016) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A167 (2011) Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip

ASTM A185/A185M (2007) Standard Specification for Steel Welded Wire Reinforcement, Plain, for Concrete

ASTM A615/A615M (2016) Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

ASTM A641/A641M (2009a; R 2014) Standard Specification for Zinc-Coated (Galvanized) Carbon Steel Wire

ASTM A653/A653M (2017) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by

SECTION 04 20 00 Page 1 the Hot-Dip Process

ASTM A951/A951M (2011) Standard Specification for Steel Wire for Masonry Joint Reinforcement

ASTM A996/A996M (2016) Standard Specification for Rail-Steel and Axle-Steel Deformed Bars for Concrete Reinforcement

ASTM C1019 (2018) Standard Test Method for Sampling and Testing Grout

ASTM C129 (2017) Standard Specification for Nonloadbearing Concrete Masonry Units

ASTM C1314 (2014) Standard Test Method for Compressive Strength of Masonry Prisms

ASTM C1384 (2012a) Standard Specification for Admixtures for Masonry Mortars

ASTM C1386 ***NEED INFO***

ASTM C1452 (2000; R 2006) Standard Specification for Reinforced Autoclaved Aerated Concrete Elements

ASTM C1611/C1611M (2014) Standard Test Method for Slump Flow of Self-Consolidating Concrete

ASTM C1660 (2010) Standard Specification for Thin-bed Mortar for Autoclaved Aerated Concrete (AAC) Masonry

ASTM C1691 ***NEED INFO***

ASTM C1693 (2011) Standard Specification for Autoclaved Aerated Concrete (AAC)

ASTM C1694 (2009) Standard Specification for Reinforced Autoclaved Aerated Concrete (AAC) Elements

ASTM C207 (2006; R 2011) Standard Specification for Hydrated Lime for Masonry Purposes

ASTM C270 (2014a) Standard Specification for Mortar for Unit Masonry

ASTM C426 ***NEED INFO***

ASTM C476 (2018) Standard Specification for Grout for Masonry

ASTM C494/C494M (2017) Standard Specification for Chemical Admixtures for Concrete

ASTM C586 (2011) Standard Test Method for Potential Alkali Reactivity of Carbonate Rocks as

SECTION 04 20 00 Page 2

Concrete Aggregates (Rock-Cylinder Method)

ASTM C616/C616M (2010) Standard Specification for Quartz-Based Dimension Stone

ASTM C641 (2017) Standard Test Method for Iron Staining Materials in Lightweight Concrete Aggregates

ASTM C744 (2016) Prefaced Concrete and Calcium Silicate Masonry Units

ASTM C780 (2017) Standard Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry

ASTM C90 (2016) Standard Specification for Loadbearing Concrete Masonry Units

ASTM C979/C979M (2016) Standard Specification for Pigments for Integrally Colored Concrete

ASTM D2000 (2012; R 2017) Standard Classification System for Rubber Products in Automotive Applications

ASTM D2287 (2012) Nonrigid Vinyl Chloride Polymer and Copolymer Molding and Extrusion Compounds

ASTM E447 ***NEED INFO***

ASTM E514/E514M (2014a) Standard Test Method for Water Penetration and Leakage Through Masonry

ASTM E518 ***NEED INFO***

ASTM E72 (2015) Conducting Strength Tests of Panels for Building Construction

THE MASONRY SOCIETY (TMS)

TMS MSJC (2016) Masonry Standard Joint Committee's (MSJC) Book - Building Code Requirements and Specification for Masonry Structures, Containing TMS 402/ACI 530/ASCE 5, TMS 602/ACI 530.1/ASCE 6, and Companion Commentaries

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SECTION 04 20 00 Page 3

SD-02 Shop Drawings

Cut CMU Drawings; G, AE Reinforcement Detail Drawings; G, AE Stone and Custom Cast Stone Cladding Assembly Drawings; G

Including - profiles and dimensions of stone and cast stone units, Show locations and details of joints both within stone cladding assembly and between stone cladding assembly and other construction. Include details of mortar joints and sealant joints. Show locations and details of anchors and backup structure. Show direction of veining, grain, or other directional patterns. Include large-scale shaded elevations and details of decorative surfaces and inscriptions.

SD-03 Product Data

Hot Weather Procedures; G Cold Weather Procedures; G Stone and Accessories; G

Information on each varitey of stone, custom cast stone, autoclaved aerated concrete units, accessories, anchors, andother products used.

Cement; G, AE Cementitious Materials; G, AE Insulation; G, AE Recycled Content of Cement; S

SD-04 Samples

Mock-Up Panel; G, AE Concrete Masonry Units (CMU); G, AE Dimension Stone Units; Limestone, Granite and Custom Cast Stone; G Autoclaved Aerated Concrete Units; G Admixtures for Masonry Mortar; G, AE Anchors, Ties, and Bar Positioners; G Joint Reinforcement; G Masonry Expansion-Joint Materials; G, AE Insulation; G, AE

SD-05 Design Data

Masonry Compressive Strength; G, AE Fire-Rated Concrete Masonry Units Bracing Calculations; G, AE

SD-06 Test Reports

Efflorescence Test Fire-Rated Concrete Masonry Units Field Testing of Mortar Field Testing of Grout Prism Tests Tie Capacity

SD-07 Certificates

SECTION 04 20 00 Page 4

Special Masonry Inspector Qualifications Concrete Masonry Units (CMU) Precast Concrete Units Custom Cast Stone Units Autoclaved Aerated Concrete Units Cementitious Materials Admixtures for Masonry Mortar Admixtures for Grout Anchors, Ties, Bar Positioners, and Metal Accessories Joint Reinforcement Insulation

SD-08 Manufacturer's Instructions

Admixtures for Masonry Mortar Admixtures for Grout

SD-10 Operation and Maintenance Data

Take-Back Program

SD-11 Closeout Submittals

Recycled Content of Cement; S

1.3 QUALITY ASSURANCE

1.3.1 Masonry Mock-Up Panels

1.3.1.1 Mock-Up Panel Location

After material samples are approved and prior to starting masonry work, construct a mock-up panel for each type and color of masonry required. At least 48 hours prior to constructing the panel or panels, submit written notification to the Contracting Officer. Do not build-in mock-up panels as part of the structure; locate mock-up panels where directed. Construct portable mock-up panels or locate in an area where they will not be disrupted during construction.

1.3.1.2 Mock-Up Panel Configuration

Construct mock-up as indicated on the drawings for the limestone, granite and custom cast stone units. For all other masonry units, construct mock-up panels L-shaped or otherwise configured to represent all of the wall elements. Construct panels of the size necessary to demonstrate the acceptable level of workmanship for each type of masonry represented on the project. Provide a straight panel or a leg of an L-shaped panel of minimum size 8 feet long by 6 feet high.

1.3.1.3 Mock-Up Panel Composition

Show full color range, texture, and bond pattern of the masonry work.

Demonstrate mortar joint tooling; grouting of reinforced vertical cores, collar joints, bond beams, and lintels; positioning, securing, and lapping of reinforcing steel; positioning and lapping of joint reinforcement (including prefabricated corners); and cleaning of masonry work during the construction of the panels. Also include installation or application procedures for anchors, wall ties, CMU control joints, masonry expansion

SECTION 04 20 00 Page 5 joints, insulation, air barriers, flashing, limestone dimensional stone units, granite stone units, and custom cast stone units to produce the complete wall system. Include a masonry bonded corner and installation of electrical boxes and conduit. When the panel represents reinforced masonry, include a 2 by 2 foot opening placed at least 2 feet above the panel base and 2 feet away from all free edges, corners, and control joints. Provide required reinforcing around this opening as well as at wall corners and control joints.

1.3.1.4 Mock-Up Panel Construction Method

Where anchored veneer walls or cavity walls are required, demonstrate and receive approval for the method of construction; i.e., either bring up the two wythes together or separately, with the insulation and appropriate ties placed within the specified tolerances across the cavity.

Demonstrate provisions to preclude mortar or grout droppings in the cavity and to provide a clear open air space of the dimensions shown on the drawings. Where masonry is to be grouted, demonstrate and receive approval on the method that will be used to bring up the masonry wythes;

support the reinforcing bars; and grout cells, bond beams, lintels, and collar joints using the requirements specified herein. When water-repellent is specified to be applied to the masonry, apply the approved product to the mock-up panel. Construct panels on a properly designed concrete foundation.

1.3.1.5 Mock-Up Panel Purpose

The completed panels is used as the standard of workmanship for the type of masonry represented. Do not commence masonry work until the mock-up panel for that type of masonry construction has been completed and approved. Protect panels from the weather and construction operations until the masonry work has been completed and approved. Perform cleaning procedures on the mockup and obtain approval of the Contracting Officer prior to cleaning the building. After completion of the work, completely remove the mock-up panels, including all foundation concrete, from the construction site.

1.3.2 Special Masonry Inspector Qualifications

Refer to Section 01 45 35 SPECIAL INSPECTIONS for qualifications and responsibilities of the masonry special inspector.

1.3.3 Fire-Resistance Ratings

Where indicated, provide materials and construction identical to those of assemblies with fire-resistance ratings determined per ASTM E119 by a testing and inspecting agency, by equivalent concrete masonry thickness, or by other means, as acceptable to authorities having jurisdiction.

1.3.4 Custom Cast Stone Manufacturer Qualifications

Certify that the custom cast stone manufacturer meets the following qualifications:

1. Sufficient plant facilities to provide quality, shapes, quantities, and sizes of custom cast stone units required without delaying progress of Work.

2. Minimum of 10 years experience in producing custom cast stone.

3. Fabricating plant shall be certified by the Architectural Precast

SECTION 04 20 00 Page 6

Association (APA), Cast Stone Institute, or equivalent certification program.

4. Manufacturer shall have an internal Quality Assurance Testing Program with certified laboratory technicians.

1.3.5 Tie Capacity

Provide test results demonstrating that the ties have adequate capacity.

1.4 DELIVERY, STORAGE, AND HANDLING

Deliver, store, handle, and protect material to avoid chipping, breakage, and contact with soil or contaminating material. Store and prepare materials in already disturbed areas to minimize project site disturbance and size of project site.

1.4.1 Masonry Units

Cover and protect masonry units from precipitation. Conform to handling and storage requirements of TMS MSJC.

a. Pack prefaced concrete masonry units in the manufacturer's standard paper cartons, trays, or shrink wrapped pallets with a divider between each unit. Do not stack pallets. Do not remove units from cartons until cartons are placed on scaffolds or in the location where units are to be laid.

b. Mark prefabricated lintels on top sides to show either the lintel schedule number or the number and size of top and bottom bars.

1.4.2 Reinforcement, Anchors, and Ties

Store steel reinforcing bars, coated anchors, ties, and joint reinforcement above the ground. Maintain steel reinforcing bars and uncoated ties free of loose mill scale and loose rust.

1.4.3 Cementitious Materials, Sand and Aggregates

Deliver cementitious and other packaged materials in unopened containers, plainly marked and labeled with manufacturers' names and brands. Store cementitious material in dry, weathertight enclosures or completely cover. Handle cementitious materials in a manner that will prevent the inclusion of foreign materials and damage by water or dampness. Store sand and aggregates in a manner to prevent contamination and segregation.

1.5 PROJECT/SITE CONDITIONS

Conform to TMS MSJC for hot and cold weather masonry erection.

1.5.1 Hot Weather Procedures

When ambient air temperature exceeds 100 degrees F, or exceeds 90 degrees F and the wind velocity is greater than 8 mph, comply with TMS MSJC Article

1.8 D for: preparation prior to conducting masonry work; construction while masonry work is in progress; and protection for newly completed masonry.

SECTION 04 20 00 Page 7

1.5.2 Cold Weather Procedures

When ambient temperature is below 40 degrees F, comply with TMS MSJC Article 1.8 C for: preparation prior to conducting masonry work;

construction while masonry work is in progress; and protection for newly completed masonry.

1.6 RELATED REQUIREMENTS

Provide acoustic isolation construction components as indicated on the drawings. See Section 13 21 48 PREFABRICATED AUDIOMETRIC ROOMS, Acoustic Isolation Construction for acoustic isolation system component specifications.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

2.1.1 Design - Specified Compressive Strength of Masonry

The specified compressive strength of masonry, f'm, is as indicated for each type of masonry.

2.1.2 Performance - Verify Masonry Compressive Strength

Verify specified compressive strength of masonry using the "Unit Strength Method" of TMS MSJC. Submit calculations and certifications of unit and mortar strength.

Verify specified compressive strength of masonry using the "Prism Test Method" of TMS MSJC when the "Unit Strength Method" cannot be used.

Submit test results.

2.2 MANUFACTURED UNITS

2.2.1 General Requirements

Do not change the source of materials, which will affect the appearance of the finished work, after the work has started except with Contracting Officer's approval. Submit test reports from an approved independent laboratory. Certify test reports on a previously tested material as the same materials as that proposed for use in this project. Submit certificates of compliance stating that the materials meet the specified requirements.

2.2.1.1 Sample Submittal

Submit limestone, granite, and custom cast stone samples as specified, showing the color range and texture of materials to be used. Limit units used on the project to those that conform to the approved sample. Submit sample of colored mortar with applicable masonry unit and color samples of a 24 inch x 24 inch section showing the pattern and one unit for each type of special shape.

2.2.2 Concrete Units

2.2.2.1 Aggregates

Test lightweight aggregates, and blends of lightweight and heavier

SECTION 04 20 00 Page 8 aggregates in proportions used in producing the units, for stain-producing iron compounds in accordance with ASTM C641,visual classification method.

Do not incorporate aggregates for which the iron stain deposited on the filter paper exceeds the "light stain" classification.

2.2.2.2 Concrete Masonry Units (CMU)

2.2.2.2.1 Cement

Use only cement that has a low alkali content and is of one brand.

2.2.2.2.2 Recycled Content

Provide units with a minimum of 5 percent post-consumer recycled content, or a minimum of 20 percent post-industrial recycled content. Document in conformance with Section 01 33 29 SUSTAINABILITY REPORTING paragraphs for recycled content requirements. Units may contain post-consumer or post-industrial recycled content.

2.2.2.2.3 Size

Provide units with specified dimensions of either nominal block sizes (8Hx16L) or special block sizes (4Hx16L) as indicated on drawings.

2.2.2.2.4 Surfaces

Provide units with exposed surfaces that are smooth and of uniform texture.

2.2.2.2.5 Weather Exposure or High Humidity

Provide concrete masonry units with water-repellant admixture added during manufacture where units will be exposed to weather or high humidity as specified on drawings.

2.2.2.2.6 Unit Types

a. Hollow Load-Bearing Units: ASTM C90, made with or normal weight aggregate.

b. Hollow Non-Load-Bearing Units: ASTM C129, lightweight or normal weight. Load-bearing units may be provided in lieu of non-load-bearing units.

2.2.2.2.7 Jamb Units

Provide jamb units of the shapes and sizes to conform with wall units.

Solid units may be incorporated in the masonry work where necessary to fill out at corners, gable slopes, and elsewhere as approved.

Provide sash jamb units with a 3/4 by 3/4 inch groove near the center at end of each unit.

2.2.2.3 Fire-Rated Concrete Masonry Units

For indicated fire-rated construction, provide concrete masonry units of minimum equivalent thickness for the fire rating indicated and the corresponding type of aggregates indicated in TABLE I. Units containing more than one of the aggregates listed in TABLE I will be rated by linear interpolation based on the percent by dry-rodded volume of each aggregate

SECTION 04 20 00 Page 9 used in manufacturing the units.

TABLE I

FIRE-RATED CONCRETE MASONRY UNITS

Aggregate Type Minimum Equivalent Thickness for Fire-Resistance Rating, inch

1/2 hour 3/4 hour 1 hour 1-1/2 hour

2 hours 3 hours 4 hours

Calcareous or siliceous gravel (other than limestone)

2.0 2.4 2.8 3.6 4.2 5.3 6.2

Limestone, cinders, or air-cooled slag

1.9 2.3 2.7 3.4 4.0 5.0 5.9

Expanded clay, expanded shale, or expanded slate

1.8 2.2 2.6 3.3 3.6 4.4 5.1

Expanded slag or pumice 1.5 1.9 2.1 2.7 3.2 4.0 4.7

Determine equivalent thickness in accordance with ACI 216.1 . Where walls are to receive plaster or be faced with brick, or otherwise form an assembly; include the thickness of plaster or brick or other material in the assembly in determining the equivalent thickness. Submit calculation results.

2.2.2.4 Prefaced Concrete Masonry Units

a. Provide prefaced concrete masonry units conforming to ASTM C744 using masonry units conforming to ASTM C90, with the facing turned over the edges and ends of the unit at least 3/8 inch in the direction of the thickness of the unit to form a lip at least 1/16 inch thick. Limit variation in color and texture to that in the approved sample.

b. Provide all shapes and sized for a complete installation. Use bullnose units along sills and caps and at vertical external corners including door jambs, window jambs, and other such openings with a bullnose radius of 1 inch. Cove base units to meet finished floor surfaces where ceramic tile floor occurs.

2.2.3 DIMENSION STONE AND CUSTOM CAST UNITS

Provide dimension stone and custom cast stone cut to the design shown and conforming to:

SECTION 04 20 00 Page 10

Limestone ASTM C586 ST-1 Indiana Limestone Company standard buff color with a smooth machine finish free from tool marks to match West Point Campus Standard. No substitutions will be accepted.

Custom Cast Stone

ASTM C 1364 Commercial grade masonry product which is a high density mixture of fine aggregate, limestone, silica sand, and portland cement.

ST-3 Custom cast stone to match ST-1 Indiana Limestone standard buff color with smooth finish ST-4 Custom cast stone color to match ST-1 with rock pitch finish.

Basis of Design is RockCast's Custom Cast Stone Series by Reading Rock.

Granite ASTM C616/C616M ST-2 TAPESTRY granites from the The Fletcher Granite Company's Milford, New Hampshire quarry set in a 5 piece ashlar pattern with a rock pitch finish and straight edge. No substitution will be accepted. Conner stones as indicated on the Drawings.

Provide a smooth machine finish on washes, 4-cut finish on treads, and 6-cut or equivalent machine finish on other exposed surfaces. Except when supported by a steel member, provide lintels 4 inches or more in thickness from face to back edge and of the depth required to support the masonry over the opening. Fabricate stone with beds and joints at right angles to the face, and with sharp, true arises. Provide copings and sills with washes, and where overhanging the walls, with drips cut on the underside.

Submit samples as specified.

2.2.3.1 Stone Panels for Walls

Provide ST-1 limestone panels with full relief engraving ofimage and lettering as shown on the drawings.

2.2.4 Autoclaved Aerated Concrete Units

Provide load bearing thermal concrete masonry units made of autoclaved aerated concrete (AAC) conforming to ASTM C1691-09, ASTM C1660-10, ASTM C1693-11, ASTM C1694-09, ASTM C426, ASTM C1386, ASTM C1452, ASTM E72, ASTM E447, ASTM E514/E514M , ASTM E518, and ASTM 3519.

Autoclaved Aerated Concrete Units to be nominal 8 inches by 16 inches by 8 inches standard block sizes with an R-value of 11.5. Follow manufacturer's recommended standards for installation and storage.

AERCON AAC is the basis of design for the AAC units.

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2.3 EQUIPMENT

2.3.1 Vibrators

Maintain at least one spare vibrator on site at all times.

2.3.2 Grout Pumps

Pumping through aluminum tubes is not permitted.

2.4 MATERIALS

2.4.1 Mortar Materials

2.4.1.1 Cementitious Materials

Provide cementitious materials that conform to those permitted by ASTM C270.

2.4.1.2 Hydrated Lime and Alternates

Provide lime that conforms to one of the materials permitted by ASTM C207 for use in combination with portland cement, hydraulic cement, and blended hydraulic cement. Do not use lime in combination with masonry cement or mortar cement.

2.4.1.3 Colored Mortar

Use mortar pigment that conforms to ASTM C979/C979M. Add pigment to mortar to produce a uniform color as indicated on the drawings. Furnish pigments in accurately pre-measured and packaged units that can be added to a measured amount of cementitious materials or supply pigments via preblended cementitious materials or dry mortar mix.

a. In masonry cement or mortar cement, do not exceed 5 percent of cement weight for mineral oxide pigment; do not exceed 1 percent of cement weight for carbon black pigment.

b. In cement-lime mortar mix, do not exceed 10 percent of cementitious materials' weight for mineral oxide pigment; do not exceed 2 percent of cementitious materials' weight for carbon black pigment.

2.4.1.4 Admixtures for Masonry Mortar

In cold weather, use a non-chloride based accelerating admixture that conforms to ASTM C1384, unless Type III portland cement is used in the mortar.

In showers and kitchens, use mortar that contains a water-repellent admixture that conforms to ASTM C1384. Provide a water-repellent admixture, conforming to ASTM C1384 and of the same brand and manufacturer as the block's integral water-repellent, in the mortar used to place concrete masonry units that have an integral water-repellent admixture.

2.4.1.5 Aggregate and Water

Provide aggregate (sand) and water that conform to materials permitted by

ASTM C270.

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2.4.2 Grout and Ready-Mix Grout Materials

2.4.2.1 Cementitious Materials for Grout

Provide cementitious materials that conform to those permitted by ASTM C476.

2.4.2.2 Admixtures for Grout

Water-reducing admixtures that conform to ASTM C494/C494M Type F or G and viscosity-modifying admixtures that conform to ASTM C494/C494M Type S are permitted for use in grout. Other admixtures require approval by the Contracting Officer.

In cold weather, a non-chloride based accelerating admixture may be used subject to approval by the Contracting Officer; use accelerating admixture that is non-corrosive and conforms to ASTM C494/C494M, Type C.

2.4.2.3 Aggregate and Water

Provide fine and coarse aggregates and water that conform to materials permitted by ASTM C476.

2.5 MORTAR AND GROUT MIXES

2.5.1 Mortar Mix

a. Provide mortar that conforms to ASTM C270. Use Type N mortar.

b. For field-batched mortar, measure component materials by volume. Use measuring boxes for materials that do not come in packages, such as sand, for consistent batching. Mix cementitious materials and aggregates between 3 and 5 minutes in a mechanical batch mixer with a sufficient amount of water to produce a workable consistency. Do not hand mix mortar unless approved by the Contracting Officer. Maintain workability of mortar by remixing or retempering. Discard mortar that has begun to stiffen or is not used within 2-1/2 hours after initial mixing.

c. For preblended mortar, follow manufacturer's mixing instructions.

2.5.2 Grout and Ready Mix Grout Mix

Use grout that conforms to ASTM C476, fine. Use conventional grout with a slump between 8 and 11 inches. Use self-consolidating grout with slump flow of 24 to 30 inches and a visual stability index (VSI) not greater than 1. Provide minimum grout strength of 2000 psi in 28 days, as tested in accordance with ASTM C1019. Do not change proportions and do not use materials with different physical or chemical characteristics in grout for the work unless additional evidence is furnished that grout meets the specified requirements. Use ready-mixed grout that conforms to ASTM C476.

2.6 ACCESSORIES

2.6.1 Grout Barriers

Grout barriers for vertical cores that consist of fine mesh wire, fiberglass, or expanded metal.

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2.6.2 Anchors, Ties, and Bar Positioners

2.6.2.1 General

a. Fabricate anchors and ties without drips or crimps. Size anchors and ties to provide a minimum of 5/8 inch mortar cover from each face of masonry.

b. Fabricate steel wire anchors and ties shall from wire conforming to ASTM A1064/A1064M and hot-dip galvanize in accordance with

ASTM A153/A153M .

c. Fabricate joint reinforcement in conformance with ASTM A951/A951M .

Hot dip galvanize joint reinforcement in exterior walls and in interior walls exposed to moist environment in conformance with ASTM A153/A153M . Galvanize joint reinforcement in other interior walls in conformance with ASTM A641/A641M ; coordinate with paragraph JOINT REINFORCEMENT below.

d. Fabricate sheet metal anchors and ties in conformance with ASTM A1008/A1008M . Hot dip galvanize sheet metal anchors and ties in exterior walls and in interior walls exposed to moist environment in compliance with ASTM A153/A153M Class B. Galvanize sheet metal anchors and ties in other interior walls in compliance with ASTM A653/A653M , Coating Designation G60.

e. Submit two anchors, ties and bar positioners of each type used, as samples.

2.6.2.2 Wire Mesh Anchors

Provide wire mesh anchors of 1/4 inch mesh galvanized hardware cloth, conforming to ASTM A185/A185M , with length not less than 12 inches, at intersections of interior non-bearing masonry walls.

2.6.2.3 Wall Ties for Multi-Wythe Masonry Construction

Provide adjustable type wall ties, of stainless steel 316, that consist of an open triangle shape with an eye on a vertical adjustable wireof minimum W2.8 diameter steel wire or pintle type ties that are inserted to eyes of horizontal joint reinforcement. Provide adjustable ties with double pintle legs and allows a maximum offset of 1-1/4 inch between each element of the tie and maximum distance between connecting parts no more than 1/16 inch. Form the pintle and eye elements shall be formed so that both can be in the same plane. Wall ties may also be of a continuous type conforming to paragraph JOINT REINFORCEMENT.

2.6.2.4 Dovetail Anchors

Provide dovetail anchors of 3/16 inch diameter steel wire, triangular shaped, and attached to a 12 gauge or heavier steel dovetail section. Use these anchors to connect the exterior masonry wythe as it passes over the face of concrete columns, beams, or walls. Fill cells immediately above and below these anchors unless solid units are used. Furnish dovetail slots, which are specified to be installed by others, in accordance with Section 03 30 00.00 10 CAST-IN-PLACE CONCRETE.

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2.6.2.5 Adjustable Anchors

2.6.2.5.1 Anchorage to Structural Steel

Provide stainless steel adjustable anchors for connecting masonry walls to the structural steel frame as detailed on the drawings . Provide zinc-rich paint for touching up paint after welding galvanized anchors to structural steel.

2.6.2.5.2 Anchorage of Veneer to Light Gauge Steel or Concrete Backing

Use one of the following types of adjustable anchors to connect veneer to light gauge steel or concrete backing:

a. sheet metal at least 7/8 inch wide, 0.06 inch thick, and with corrugations having a wavelength of 0.3 to 0.5 inch and an amplitude of

0.06 to 0.10 inch or bent, notched or punched to provide equivalent performance;

b. wire anchors of minimum size W1.7 with ends bent to form a minimum 2 inches extension and without drips;

c. or wire pintle anchors used in conjunction with joint reinforcement.

Do not exceed 1/16 inch clearance between connecting parts of the tie.

Assemble adjustable anchors to prevent disengagement. Provide pintle anchors with one or more pintle legs of wire size W2.8 and an offset not exceeding 1-1/4 inch.

2.6.2.6 Veneer Anchor Screws

Provide screws for attachment of veneer anchors to cold-formed steel framing members of size as required by design to provide the needed pullout load capacity but not less than No. 12. Provide length of screws such that the screws penetrate the holding member by not less than 5/8 inch.

2.6.2.7 Bar Positioners

Factory-fabricate bar positioners, used to prevent displacement of reinforcing bars during the course of construction, from 9 gauge steel wire or equivalent, and hot-dip galvanized.

2.6.3 Joint Reinforcement

Factory fabricate joint reinforcement in conformance with ASTM A951/A951M , welded construction. Provide ladder type joint reinforcement, having one longitudinal wire in the mortar bed of each face shell for hollow units and one wire for solid units and with all wires a minimum of 9 gauge.

Size joint reinforcement to provide a minimum of 5/8 inch cover from each face. Space crosswires not more than 16 inches. Provide joint reinforcement for straight runs in flat sections not less than 10 feet long. Provide joint reinforcement with factory formed corners and intersections. If approved for use, joint reinforcement may be furnished with adjustable wall tie features. Submit one piece of each type used, including corner and wall intersection pieces, showing at least two cross wires.

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2.6.4 Reinforcing Steel Bars

Reinforcing steel bars and rods shall conform to ASTM A615/A615M or ASTM A996/A996M , Grade 60.

2.6.5 Concrete Masonry Control Joint Keys

Provide control joint keys of a factory fabricated solid section of natural or synthetic rubber (or combination thereof) conforming to ASTM D2000 M2AA-805 with a minimum durometer hardness of 80 or polyvinyl chloride conforming to ASTM D2287 Type PVC 654-4 with a minimum durometer hardness of 85. Form the control joint key with a solid shear section not less than 5/8 inch thick and 3/8 inch thick flanges, with a tolerance of plus or minus 1/16 inch, to fit neatly, but without forcing, in masonry unit jamb sash grooves.

2.6.6 Through Wall Flashing and Weeps

2.6.6.1 General

Provide stainless steel sheet flashing

2.6.6.2 Stainless Steel Flashing

Provide stainless steel, ASTM A167, Type 304 or 316, 0.015 inch thick, No. 2D finish. Where indicated, provide with factory-fabricated deformations that mechanically bond flashing against horizontal movement in all directions, where deformations consist of dimples, diagonal corrugations, or a combination of dimples and transverse corrugations.

2.6.6.3 Weep Ventilators

Provide weep ventilators that are prefabricated from plastic. Provide inserts with grill or louver-type openings designed to allow the passage of moisture from cavities and to prevent the entrance of insects, and with a rectangular closure strip to prevent mortar droppings from clogging the opening. Provide ventilators with compressible flanges to fit in a standard 3/8 inch wide mortar joint and with height equal to the nominal height of the unit. Color of weeps to match adjacent mortar or sealant.

2.6.6.4 Metal Drip Edge

Provide stainless steel drip edge, 24 guage, hemmed edges, with drip at the outside edge as indicated on the drawings and upturned dam at the inside edge for use with membrane flashings.

2.6.7 RIGID BOARD-TYPE INSULATION

Provide rigid board-type insulation as specified in Section 07 21 13 BOARD

AND BLOCK INSULATION.

PART 3 EXECUTION

3.1 EXAMINATION

Prior to start of work, verify the applicable conditions as set forth in TMS MSJC, inspection.

SECTION 04 20 00 Page 16

3.2 PREPARATION

3.2.1 Protection

Ice or snow formed on the masonry bed shall be thawed by the application of heat. Heat shall be applied carefully until the top surface of the masonry is dry to the touch. Sections of masonry deemed frozen and damaged shall be removed before continuing construction of those sections.

a. Air temperature 40 to 32 degrees F. Sand or mixing water shall be heated to produce mortar temperatures between 40 and 120 degrees F.

b. Air temperature 32 to 25 degrees F. Sand or mixing water shall be heated to produce mortar temperatures between 40 and 120 degrees F.

Temperature of mortar on boards shall be maintained above freezing.

c. Air temperature 25 to 20 degrees F. Sand or mixing water shall be heated to produce mortar temperatures between 40 and 120 degrees F.

Temperature of mortar on boards shall be maintained above freezing.

Sources of heat shall be used on both sides of walls under construction. Windbreaks shall be employed when wind is in excess of 15 mph.

d. Air temperature 20 degrees F and below. Sand or mixing water shall be heated to produce mortar temperatures between 40 and 120 degrees F.

Enclosure and auxiliary heat shall be be provided to maintain air temperature above 32 degrees F. Temperature of units when laid shall not be less than 20 degrees F.

3.2.2 Completed Masonry and Masonry Not Being Worked On

a. Mean daily air temperature 40 to 32 degrees F. Masonry shall be protected from rain or snow for 24 hours by covering with weather-resistive membrane.

b. Mean daily air temperature 32 to 25 degrees F. Masonry shall be completely covered with weather-resistant membrane for 24 hours.

c. Mean daily air temperature 25 to 20 degrees F. Masonry shall be completely covered with insulating blankets or equally protected for 24 hours.

d. Mean daily air temperature 20 degrees F and below. Masonry temperature shall be maintained above 32 degrees F for 24 hours by enclosure and supplementary heat, by electric heating blankets, infrared heat hamps, or other approved methods.

3.2.3 Concrete Surfaces

Where masonry is to be placed, clean concrete of laitance, dust, dirt, oil, organic matter, or other foreign materials and slightly roughen to provide a surface texture with a depth of at least 1/8 inch. Sandblast, if necessary, to remove laitance from pores and to expose the aggregate.

3.2.4 Shelf Angles

Adjust shelf angles as required to keep the masonry level and at the proper elevation.

SECTION 04 20 00 Page 17

3.2.5 Bracing

Provide bracing and scaffolding necessary for masonry work. Design bracing to resist wind pressure as required by OSHA and local codes and submit bracing calculations, sealed by a registered professional engineer. Do not remove bracing in less than 10 days.

3.3 ERECTION

3.3.1 General

a. Coordinate masonry work with the work of other trades to accommodate built-in items and to avoid cutting and patching. Lay masonry units in running bond pattern or as indicted elsewhere. Lay facing courses level with back-up courses, unless the use of adjustable ties has been approved in which case the tolerances is plus or minus 1/2 inch.

Adjust each unit to its final position while mortar is still soft and has plastic consistency.

b. Remove and clean units that have been disturbed after the mortar has stiffened, and relay with fresh mortar. Keep air spaces, cavities, insulation, chases, expansion joints, and spaces to be grouted free from mortar and other debris. Select units to be used in exposed masonry surfaces from those having the least amount of chipped edges or other imperfections detracting from the appearance of the finished work.

c. When necessary to temporarily discontinue the work, step (rack) back the masonry for joining when work resumes. Toothing may be used only when specifically approved by the Contracting Officer. Before resuming work, remove loose mortar and thoroughly clean the exposed joint. Cover the top of walls including cavities and insulation subjected to rain or snow with nonstaining waterproof covering or membrane when work is not in process. Extend the covering a minimum of 2 feet down on each side of the wall and hold securely in place.

d. Ensure that units being laid and surfaces to receive units are free of water film and frost. Lay solid units in a nonfurrowed full bed of mortar. Bevel mortar for veneer wythes and slope down toward the cavity side. Shove units into place so that the vertical joints are tight. Completely fill vertical joints between solid units with mortar, except where indicated at control, expansion, and isolation joints. Place hollow units so that mortar extends to the depth of the face shell at heads and beds, unless otherwise indicated. Mortar will be permitted to protrude up to 1/2 inch into the space or cells to be grouted. Provide means to prevent mortar from dropping into the space below or clean grout spaces prior to grouting.

e. In multi-wythe construction with collar joints no more than 3/4 inch wide, bring up the inner wythe not more than 16 inches ahead of the outer wythe. Fill collar joints with mortar during the laying of the facing wythe, and filling shall not lag the laying of the facing wythe by back-buttering each unit as it is laid.

3.3.1.1 Jointing

Tool mortar joints when the mortar is thumbprint hard. Tool horizontal joints after tooling vertical joints. Brush mortar joints to remove loose and excess mortar.

SECTION 04 20 00 Page 18

3.3.1.1.1 Tooled Joints

Tool mortar joints in exposed exterior and interior masonry surfaces concave, using a jointer that is slightly larger than the joint width so that complete contact is made along the edges of the unit. Perform tooling so that the mortar is compressed and the joint surface is sealed.

Use a jointer of sufficient length to obtain a straight and true mortar joint.

3.3.1.1.2 Flush Joints

Flush cut mortar joints in concealed masonry surfaces and joints at electrical outlet boxes in wet areas. Finish flush cut joints by cutting off the mortar flush with the face of the wall. Point joints in unparged masonry walls below grade tight. For architectural units, such as fluted units, completely fill both the head and bed joints and flush cut.

3.3.1.1.3 Door and Window Frame Joints

On the exposed interior side of exterior frames, joints between frames and abutting masonry walls shall be raked to a depth of 3/8 inch. On the exterior side of exterior frames, joints between frames and abutting masonry walls shall be raked to a depth of 3/8 inch.

3.3.1.1.4 Joint Widths

a. Provide 3/8 inch wide mortar joints in concrete masonry, except for prefaced concrete masonry units.

b. Maintain mortar joint widths within tolerances permitted by TMS MSJC

3.3.1.2 Cutting and Fitting

Use full units of the proper size wherever possible, in lieu of cut units. Locate cut units where they would have the least impact on the architectural aesthetic goals of the facility. Perform cutting and fitting, including that required to accommodate the work of others, by masonry mechanics using power masonry saws. Concrete masonry units may be wet or dry cut. Before being placed in the work, dry wet-cut units to the same surface-dry appearance as uncut units being laid in the wall.

Provide cut edges that are clean, true and sharp.

a. Carefully make openings in the masonry so that wall plates, cover plates or…