AMD_1_SPECS.pdf

VAFO 211497 000110

071018

TABLE OF CONTENTS, Rev. 1

DIVISION SECTION TITLE

DIVISION 00 – PROCUREMENT AND CONTRACTING REQIREMENTS

000110 TABLE OF CONTENTS

DIVISION 01 – GENERAL REQUIREMENTS

011100 SUMMARY

012601 CONTRACT MODIFICATION PROCEDURES

012700 DEFINITION OF CONTRACT LIMIT LINES

013100 PROJECT MANAGEMENT & COORDINATION

013216 CONSTRUCTION SCHEDULE

0132 33 PHOTOGRAPHIC DOCUMENTATION

0133 23 SUBMITTAL PROCEDURES

013523 SAFETY REQUIREMENTS

014000 QUALITY REQUIREMENTS

014200 REFERENCE STANDARS

015000 TEMPORARY FACILITIES AND CONTROLS

015639 TEMPORARY TREE AND PLANT PROTECTION

015719.11 INDOOR AIR QUALITY MANAGEMENT

015719.12 NOISE & ACOUSTICS MANAGEMENT

015723 TEMPORARY STORM WATER POLLUTION PREVENTION

016700 PRODUCT REQUIREMENTS

017329 CUTTING AND PATCHING

017340 EXECUTION

017419 CONSTRUCTION WASTE MANAGEMENT AND DISPOSAL

017700 CLOSEOUT PROCEDURES

017823 OPERATION AND MAINTENANCE DATA

017900 DEMONSTRATION AND TRAINING

018113 SUSTAINABLE DESIGN REQUIREMENTS FOR NON-LEED PROJECTS

019114 TOTAL BUILDING COMMISSIONING

TABLE OF CONTENTS, Rev. 1

DIVISION SECTION TITLE

TECHNICAL SECTIONS

DIVISION 02 – EXISTING CONDITIONS

024119 SELECTIVE DEMOLITION

DIVISION 03 - CONCRETE

033000

CAST-IN-PLACE CONCRETE

033543 SPECIAL CONCRETE FLOOR FINISHES

DIVISION 04 – MASONRY

042200 CONCRETE UNIT MASONRY

047200 CAST STONE MASONRY

DIVISION 05 - METALS

051200 STRUCTURAL STEEL

053000 STEEL DECK

055000 METAL FABRICATIONS

055213 PIPE AND TUBE RAILINGS

DIVISION 06 - WOOD, PLASTICS, AND COMPOSITES

061053 MISCELLANEOUS ROUGH CARPENTRY

064113 WOOD AND PLASTIC-FACED ARCHITECTURAL CABINETS

064116 PLASTIC LAMINATE-CLAD ARCHITECTURAL CABINETS

DIVISION 07 – THERMAL AND MOISTURE PROTECTION

070150.19 PREPARATION FOR REROOFING

072100 THERMAL INSULATION

075216 SBS-MODIFIED BITUMEN MEMBRANE ROOFING

076200 SHEET METAL FLASHING AND TRIM

077200 ROOF ACCESSORIES

078413 PENETRATION FIRESTOPPING

079200 JOINT SEALANTS

TABLE OF CONTENTS, Rev. 1

DIVISION SECTION TITLE

DIVISION 08 – OPENINGS

081113

HOLLOW METAL DOORS AND FRAMES

083213 INTERIOR SLIDING GLASS DOORS

084113 ALUMINUM-FRAMED ENTRANCES AND STOREFRONTS

084213 ALUMINUM-FRAMED ENTRANCES

084229.33 SWINGING AUTOMATIC ENTRANCES

087100 DOOR HARDWARE

088000 GLAZING

088000.13 INTERIOR GLAZING

DIVISION 09 - FINISHES

092116.23 092216

GYPSUM BOARD SHAFT WALL ASSSEMBLIES

NON-STRUCTURAL METAL FRAMING

092900 GYPSUM BOARD

093013 CERAMIC TILING

095113 ACOUSTICAL PANEL CEILINGS

096513 RESILIENT BASE AND ACCESSSORIES

096519 RESILIENT TILE FLOORING

096813 TILE CARPETING

096816 SHEET CARPETING

098436 SOUND ABSORBING CEILING UNITS

099123 INTERIOR PAINTING

DIVISION 10 - SPECIALTIES

101423

PANEL SIGNAGE

102113.17 PHENOLIC CORE TOILET COMPARTMENTS

102800 TOILET, BATH AND LAUNDRY ACCESSORIES

105123 PLASTIC-LAMINATE-CLAD WOOD LOCKERS

107500 FALL RESTRAINT

DIVISION 11 - EQUIPMENT

113100 RESIDENTIAL APPLIANCES

TABLE OF CONTENTS, Rev. 1

DIVISION SECTION TITLE

DIVISION 12 - FURNISHINGS

122413

ROLLER WINDOW SHADES

123661.19 QUARTZ AGGLOMORATE COUNTER TOPS

124816 ENTRANCE FLOOR GRILLES

DIVISION 14 - CONVEYING EQUIPMENT

142600

LIMITED-USE-LIMITED-APPLICATION ELEVATORS

DIVISION 21 - FIRE SUPPRESSION

21 00 01

SEPARATION OF WORK BETWEEN THE TRADES

21 00 02 FIRE PROTECTION SPECIAL CONDITIONS

21 00 03 SCOPE OF WORK

21 05 17 SLEEVES AND SEALS FOR FIRE SUPPRESSION PIPING

21 05 18 ESCUTCHEONS FOR FIRE SUPPRESSION PIPING

21 05 20 PIPING AND FITTING MATERIALS

21 05 23 FIRE SUPPRESSION VALVES

21 05 29 HANGERS, SUPPORTS, ANCHORS AND GUIDES FOR FIRE SUPPRESSION SYSTEMS

21 05 48 VIBRATION AND SEISMIC CONTROLS FOR FIRE SUPPRESSION PIPING AND EQUIPMENT

21 05 53 IDENTIFICATION OF FIRE SUPPRESSION PIPING AND EQUIPMENT

21 05 80 ACCESS DOORS IN GENERAL CONSTRUCTION

21 05 85 FIRE PROTECTION FIRESTOPPING

21 05 95 FIRE PROTECTION BASIC MATERIALS AND METHODS

21 08 00 COMMISSIONING OF FIRE PROTECTION SYSTEMS

21 12 00 STANDPIPE AND HOSE SYSTEMS

21 13 13 WET PIPE SPRINKLER SYSTEMS

DIVISION 22 - PLUMBING

22 00 01

SEPARATION OF WORK BETWEEN TRADES

22 00 02 PLUMBING SPECIAL CONDITIONS

22 00 03 SCOPE OF WORK

22 05 17 SLEEVES AND SLEEVE SEALS FOR PLUMBING PIPING

22 05 18 ESCUTCHEONS FOR PLUMBING PIPING

22 05 20 PIPING AND FITTING MATERIALS

22 05 23 VALVES

22 05 29 HANGERS, SUPPORTS, ANCHORS AND GUIDES

22 05 30 DISINFECTING OF WATER SUPPLY SYSTEM

22 05 35 BACKFLOW PREVENTION

22 05 48 VIBRATION ISOLATION AND SEISMIC CONTROL FOR PLUMBING SYSTEM

22 05 53 IDENTIFICATION OF PLUMBING PIPING AND EQUIPMENT

22 05 80 ACCESS DOORS IN GENERAL CONSTRUCTION

22 05 85 PLUMBING FIRESTOPPING

22 05 90 TESTING

22 05 95 PLUMBING BASIC MATERIALS AND METHODS

22 07 19 INSULATION

22 08 00 COMMISSIONING OF PLUMBING SYSTEM

22 11 16 DOMESTIC WATER PIPING AND FITTING MATERIALS

22 11 19 DOMESTIC WATER SPECIALTIES

22 13 16 SANITARY WASTE AND VENT PIPING AND FITTING MATERIALS

22 13 19 SANITARY WASTE PIPING SPECIALTIES

22 42 00 PLUMBING FIXTURES AND TRIM

DIVISION 23 - HVAC

23 00 02 HEATING, VENTILATION, AND AIR CONDITIONING GENERAL CONDITIONS

23 00 05 ACCESS DOORS IN GENERAL CONSTRUCTION

23 02 00 FIRESTOPPING

23 05 13 ELECTRIC MOTORS

23 05 16 EXPANSION COMPENSATORS

23 05 23 VALVES

23 05 29 HANGERS, ANCHORS AND SUPPORTS

23 05 40 ACOUSTICS

23 05 48 VIBRATION ISOLATION

23 05 53 SYSTEMS IDENTIFICATION

23 05 93 TESTING, ADJUSTING AND BALANCING

23 07 00 INSULATION

23 09 00 INSTRUMENTS

23 09 23

BUILDING MANAGEMENT AND CONTROL SYSTEMS (BMCS)

23 11 13 SHEET METAL, DUCTWORK, AND ACCESSORIES

23 21 23 PUMPS

23 25 00 PIPE CLEANING AND CHEMICAL WATER TREATMENT

23 26 00 WATER SPECIALTIES

23 33 13 DAMPERS

23 33 20 DUCT CLEANING

23 36 00 AIR TERMINAL UNITS

23 36 10 AIR OUTLETS AND INLETS

23 41 00 AIR FILTERS AND CLEANERS

23 52 10 PIPING AND ACCESSORIES

23 55 10 REFRIGERATION MACHINES (AIR COOLED)

23 73 00 FACTORY ASSEMBLED AIR HANDLING UNITS

23 73 05 FANS

23 82 16 COILS

23 82 19 FAN COIL UNITS

23 84 13 STEAM HUMIDIFIERS

23 84 40 SPACE HEATING UNITS

23 85 00 VARIABLE FREQUENCY CONTROLLERS

DIVISION 26 – ELECTRICAL

26 00 01 ELECTRICAL GENERAL CONDITIONS

26 00 05 ACCESS DOORS IN GENERAL CONSTRUCTION

26 02 50 SYSTEMS IDENTIFICATION

26 02 70 TEMPORARY LIGHTING AND POWER

26 02 80 EQUIPMENT CONNECTIONS AND COORDINATION

26 02 90 CEILING, FLOOR AND WALL ELECTRICAL PENETRATION FIRE SEALS

26 05 19 600 VOLT WIRE AND CABLE

26 05 33 RACEWAYS AND BOXES

26 05 48 VIBRATION ISOLATION AND SEISMIC RESTRAINTS

26 05 73

OVERCURRENT PROTECTIVE DEVICE

COORDINATION STUDY

26 08 00 COMMISSIONING OF ELECTRICAL SYSTEMS

26 09 36 MODULAR DIMMING CONTROLS

26 24 16 PANELBOARDS

26 27 26 WIRING DEVICES

26 28 16 DISCONNECT SWITCHES

26 31 00 PHOTOVOLTAIC SYSTEM

26 50 00 LUMINAIRES AND ACCESSORIES

26 50 06 LIGHTING CONTROL DEVICES

DIVISION 27 - COMMUNICATIONS

27 05 30 INNERDUCT FOR COMMUNICATIONS SYSTEMS

27 05 33 CONDUITS, PULLBOXES AND BACKBOXES FOR COMMUNICATIONS SYSTEMS

27 05 53 IDENTIFICATION FOR COMMUNICATION SYSTEMS

27 06 37 FIRESTOPPING FOR COMMUNICATIONS SYSTEMS

27 08 00 TESTING OF COMMUNICATIONS SYSTEMS

27 10 00 STRUCTURED CABLING

27 11 16 COMMUNICATIONS CABINETS, RACKS, FRAMES AND ENCLOSURES

27 11 19 COMMUNICATIONS TERMINATION BLOCKS AND PATCH PANELS

27 11 23 COMMUNICATIONS CABLE MANAGEMENT AND RUNWAY

27 15 13 COPPER HORIZONTAL CABLING

27 15 43 COMMUNICATIONS FACEPLATES AND CONNECTORS

27 16 19 COMMUNICATIONS PATCH CORDS AND STATION CORDS

DIVISION 28 - ELECTRONIC SAFETY AND SECURITY

28 00 00

SECURITY GENERAL SYSTEM REQUIREMENTS

28 05 28 FIRESTOPPING FOR COMM-SECURITY SYSTEMS

28 13 00 ACCESS CONTROL SYSTEM

28 13 01 ACCESS CONTROL CARD READERS

28 16 00 INTRUSION DETECTION SYSTEM

28 21 00 VIDEO SURVEILLANCE REMOTE SENSORS AND DEVICES

28 23 00 VIDEO SURVEILLANCE MANAGEMENT SYSTEM

28 31 11 LIFE SAFETY ALARM SYSTEM

DIVISION 32 – EXTEROR IMPROVEMENTS

321216

ASPHALT PAVING

https://www.arcat.com/sd/divs/sd_div28.shtml

TABLE OF CONTENTS, Rev. 1

321223 IMPRINTED ASPHALT

321313 CONCRETE PAVING

END OF TABLE OF CONTENTS

VAFO – 211497

042200 - 1 CONCRETE UNIT MASONRY, Rev. 1

SECTION 042200 - CONCRETE UNIT MASONRY, Rev. 1

PART 1 - GENERALRELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Concrete masonry units.

2. Mortar and grout.

3. Steel reinforcing bars.

4. Masonry-joint reinforcement.

5. Embedded flashing.

6. Miscellaneous masonry accessories.

B. Products Installed but not Furnished under This Section:

1. Precast concrete panels under east and west triangular tower curtain walls.

C. Related Requirements:

1. Section 076200 "Sheet Metal Flashing and Trim" for exposed sheet metal flashing and for furnishing manufactured reglets installed in masonry joints.

1.3 DEFINITIONS

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

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

1.4 PREINSTALLATION MEETINGS

A. Pre-installation Conference: Conduct conference at Project site.

1.5 ACTION SUBMITTALS

A. Product Data: For each type of product.

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B. Shop Drawings: For the following:

1. Masonry Units: Show sizes, profiles, coursing, and locations of special shapes.

2. Reinforcing Steel: Detail bending, lap lengths, and placement of unit masonry reinforcing bars. Comply with ACI 315. Show elevations of reinforced walls.

C. Samples for Verification: For each type and color of the following:

1. CMUs.

1.6 INFORMATIONAL SUBMITTALS

A. Qualification Data: For testing agency.

B. Material Certificates: For each type and size of the following:

1. Masonry units.

a. Include material test reports substantiating compliance with requirements.

b. For masonry unit used in structural masonry, include data and calculations establishing average net-area compressive strength of units.

2. Cementitious materials. Include name of manufacturer, brand name, and type.

3. Mortar admixtures.

4. Pre-blended, dry mortar mixes. Include description of type and proportions of ingredients.

5. Grout mixes. Include description of type and proportions of ingredients.

6. Reinforcing bars.

7. Joint reinforcement.

8. Anchors, ties, and metal accessories.

C. Mix Designs: For each type of mortar and grout. Include description of type and proportions of ingredients.

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 water retention, and ASTM C 91/C 91M for air content.

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

D. Statement of Compressive Strength of Masonry: For each combination of masonry unit type and mortar type, provide statement of average net-area compressive strength of masonry units, mortar type, and resulting net-area compressive strength of masonry determined according to

TMS 602/ACI 530.1/ASCE 6.

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

042200 - 3

1.7 QUALITY ASSURANCE

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

B. Mockups: Build mockups to verify selections made under Sample submittals, to demonstrate aesthetic effects, and to set quality standards for materials and execution.

1. Build mockup of typical wall area as shown on Drawings in location as directed by Contracting Officer.

2. Build mockups for each type of exposed unit masonry construction in sizes approximately 60 inches (1500 mm) long by 60 inches (1500 mm) high by full thickness, including accessories.

3. Protect accepted mockups from the elements with weather-resistant membrane.

4. 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 of workmanship.

a. Approval of mockups does not constitute approval of deviations from the Contract

Documents contained in mockups unless Architect specifically approves such deviations in writing.

5. Work if undisturbed Subject to compliance with requirements, approved mockups may become part of the completed at time of Substantial Completion.

1.8 DELIVERY, STORAGE, AND HANDLING

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

B. Store cementitious materials on elevated platforms, under cover, and in a dry location. Do not use cementitious materials that have become damp.

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

D. Deliver pre-blended, dry mortar mix in moisture-resistant containers. Store preblended, dry mortar mix in delivery containers on elevated platforms in a dry location or in covered weatherproof dispensing silos.

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

1.9 FIELD CONDITIONS

A. Protection of Masonry: During construction, cover tops of walls, projections, and sills with waterproof sheeting at end of each day's work. Cover partially completed masonry when construction is not in progress.

042200 - 4

1. Extend cover a minimum of 24 inches (600 mm) down both sides of walls, and hold cover securely in place.

B. Do not apply uniform floor or roof loads for at least 12 hours and concentrated loads for at least three days after building masonry walls or columns.

C. Stain Prevention: Prevent grout, mortar, and soil from staining the face of masonry to be left exposed or painted. Immediately remove grout, mortar, and soil that come in contact with such masonry.

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.

D. Cold-Weather Requirements: Do not use frozen materials or materials mixed or coated with ice or frost. Do not build on frozen substrates. Remove and replace unit masonry damaged by frost or by freezing conditions. Comply with cold-weather construction requirements contained in

TMS 602/ACI 530.1/ASCE 6.

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 seven days after completing cleaning.

E. Hot-Weather Requirements: Comply with hot-weather construction requirements contained in

TMS 602/ACI 530.1/ASCE 6.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

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

B. Source Limitations for Mortar Materials: Obtain mortar ingredients of a uniform quality, including color for exposed masonry, from single manufacturer for each cementitious component and from single source or producer for each aggregate.

2.2 PERFORMANCE REQUIREMENTS

A. Provide structural 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

TMS 602/ACI 530.1/ASCE 6.

042200 - 5

2. Determine net-area compressive strength of masonry by testing masonry prisms according to ASTM C 1314.

2.3 UNIT MASONRY, GENERAL

A. Masonry Standard: Comply with TMS 602/ACI 530.1/ASCE 6 except as modified by requirements in the Contract Documents.

B. Defective Units: Referenced masonry unit standards may allow a certain percentage of units to contain chips, cracks, or other defects exceeding limits stated. Do not use units where such defects are exposed in the completed Work.

C. Fire-Resistance Ratings: Comply with requirements for fire-resistance-rated assembly designs indicated.

1. Where fire-resistance-rated construction is indicated, units shall be listed and labeled by a qualified testing agency acceptable to authorities having jurisdiction.

2.4 CONCRETE MASONRY UNITS

A. Shapes: Provide shapes indicated and as follows, with exposed surfaces matching exposed faces of adjacent units unless otherwise indicated.

1. Provide special shapes for lintels, corners, jambs, bonding, and other special conditions.

2. Provide square-edged units for outside corners unless otherwise indicated.

B. CMUs: ASTM C 90.

1. Unit Compressive Strength: Provide units with minimum average net-area compressive strength of 3050 psi (21.0 MPa).

2. Density Classification: Normal weight.

3. Size (Width): Manufactured to dimensions 3/8 inch (10 mm) less-than-nominal dimensions.

4. Faces to Receive Plaster: Where units are indicated to receive a direct application of plaster, provide textured-face units made with gap-graded aggregate.

C. Decorative CMUs: ASTM C90.(To Form East Tower Raised Exit Walkway)

1. Unit Compressive Strength: Provide units with minimum average net-area compressive strength of 3050 psi (21.0 MPa).

2. Density Classification: Normal weight.

3. Size (Width): 12” (309.8 mm).

4. Type: Fully grouted and reinforced.

5. Pattern and Texture:

a. Standard pattern, ground-face finish.

6. Colors: As selected by Architect from manufacturer's full range during materials submittal phase.

042200 - 6

2.5 MORTAR AND GROUT MATERIALS

A. Portland Cement: ASTM C 150/C 150M, Type I or II, except Type III may be used for cold-weather construction. Provide natural color or white cement as required to produce mortar color indicated.

1. Alkali content shall not be more than 0.1 percent when tested according to ASTM C 114.

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

C. Portland Cement-Lime Mix: Packaged blend of portland cement and hydrated lime containing no other ingredients.

D. Masonry Cement: ASTM C 91/C 91M.

E. 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.

F. Aggregate for Grout: ASTM C 404.

G. Cold-Weather Admixture: Non-chloride, noncorrosive, accelerating admixture complying with ASTM C 494/C 494M, Type C, and recommended by manufacturer for use in masonry mortar of composition indicated.

H. Water: Potable.

2.6 REINFORCEMENT

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

B. Reinforcing Bar Positioners: Wire units designed to fit into mortar bed joints spanning masonry unit cells and to 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 of bars indicated.

C. Masonry-Joint Reinforcement, General: Ladder type complying with ASTM A 951/A 951M.

1. Interior Walls: Hot-dip galvanized carbon steel.

2. Wire Size for Side Rods: 0.187-inch (4.76-mm) diameter.

3. Wire Size for Cross Rods: 0.187-inch (4.76-mm) diameter.

4. Spacing of Cross Rods: Not more than 16 inches (407 mm) o.c.

5. Provide in lengths of not less than 10 feet (3 m), with prefabricated corner and tee units.

042200 - 7

2.7 TIES AND ANCHORS

A. General: Ties and anchors shall extend at least 1-1/2 inches (38 mm) into masonry but with at least a 5/8-inch (16-mm) cover on outside face.

B. Materials: Provide ties and anchors specified in this article that are made from materials that comply with the following unless otherwise indicated:

1. Mill-Galvanized, Carbon-Steel Wire: ASTM A 82/A 82M, with ASTM A 641/A 641M, Class 1 coating.

2. Hot-Dip Galvanized, Carbon-Steel Wire: ASTM A 82/A 82M, with ASTM A 153/A 153M, Class B-2 coating.

3. Stainless-Steel Wire: ASTM A 580/A 580M, Type 304.

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

5. Steel Sheet, Galvanized after Fabrication: ASTM A 1008/A 1008M, Commercial Steel, with ASTM A 153/A 153M, Class B coating.

6. Stainless-Steel Sheet: ASTM A 240/A 240M or ASTM A 666, Type 304.

7. Steel Plates, Shapes, and Bars: ASTM A 36/A 36M.

C. Adjustable Anchors for Connecting to Structural Steel Framing: Provide anchors that allow vertical or horizontal adjustment but resist tension and compression forces perpendicular to plane of wall.

1. Anchor Section for Welding to Steel Frame: Crimped 1/4-inch- (6.35-mm-) diameter, hot-dip galvanized steel wire.

2. Tie Section: Triangular-shaped wire tie made from 0.25-inch- (6.35-mm-) diameter, hot-dip galvanized steel wire.

D. Partition Top Anchors: 0.105-inch- (2.66-mm-) thick metal plate with a 3/8-inch- (9.5-mm-) diameter metal rod 6 inches (152 mm) long welded to plate and with closed-end plastic tube fitted over rod that allows rod to move in and out of tube. Fabricate from steel, hot-dip galvanized after fabrication.

2.8 MISCELLANEOUS MASONRY ACCESSORIES

A. Compressible Filler: Pre-molded filler strips complying with ASTM D 1056, Grade 2A1;

compressible up to 35 percent; of width and thickness indicated; formulated from neoprene.

2.9 MORTAR AND GROUT MIXES

A. General: Do not use admixtures, including pigments, air-entraining agents, accelerators, retarders, water-repellent agents, antifreeze compounds, or other admixtures unless otherwise indicated.

1. Do not use calcium chloride in mortar or grout.

2. Use Portland cement-lime mortar unless otherwise indicated.

042200 - 8

3. 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.

B. Pre-blended, Dry Mortar Mix: Furnish dry mortar ingredients in form of a pre-blended mix.

Measure quantities by weight to ensure accurate proportions, and thoroughly blend ingredients before delivering to Project site.

C. Mortar for Unit Masonry: Comply with ASTM C 270, Proportion Specification. Provide the following types of mortar.

1. For reinforced masonry, use Type S or Type M.

D. 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 TMS 602/ACI 530.1/ASCE 6 for dimensions of grout spaces and pour height.

2. Proportion grout in accordance with ASTM C 476, for specified 28-day compressive strength indicated, but not less than 3000 psi (21 MPa).

3. Provide grout with a slump of 8 to 11 inches (200 to 280 mm) as measured according to

ASTM C 143/C 143M.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of the Work.

1. For the record, prepare written report, endorsed by Installer, listing conditions detrimental to performance of the Work.

2. Verify that foundations are within tolerances specified.

3. Verify that reinforcing dowels are properly placed.

4. Verify that substrates are free of substances that would impair mortar bond.

B. Before installation, examine rough-in and built-in construction for piping systems to verify actual locations of piping.

C. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 INSTALLATION, GENERAL

A. Build chases and recesses to accommodate items specified in this and other Sections.

B. Leave openings for equipment to be installed before completing masonry. After installing equipment, complete masonry to match construction immediately adjacent to opening.

042200 - 9

C. Use full-size units without cutting if possible. If cutting is required to provide a continuous pattern or to fit adjoining construction, cut units with motor-driven saws; provide clean, sharp, unchipped edges. Allow units to dry before laying unless wetting of units is specified. Install cut units with cut surfaces and, where possible, cut edges concealed.

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 6 m), 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 (6 mm 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, and expansion and control joints, do not vary from plumb by more than 1/8 inch in 10 feet (3 mm in 3 m), 1/4 inch in 20 feet (6 mm in 6 m), or 1/2-inch (12-mm) maximum.

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

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

7. For faces of adjacent exposed masonry units, do not vary from flush alignment by more than 1/16 inch (1.5 mm).

C. Joints:

1. For bed joints, do not vary from thickness indicated by more than plus or minus 1/16 inch (1.6 mm), with a maximum thickness limited to 3/8 inch (9.5 mm).

2. For exposed bed joints, do not vary from bed-joint thickness of adjacent courses by more than 1/16 inch (1.6 mm).

3. For head and collar joints, do not vary from thickness indicated by more than plus 1/8 inch (3 mm) or minus 1/8 inch (3 mm).

4. For exposed head joints, do not vary from thickness indicated by more than plus or minus

1/8 inch (3 mm).

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3.4 LAYING MASONRY WALLS

A. Lay out walls in advance for accurate spacing of surface bond patterns with uniform joint thicknesses 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, at other locations.

B. Bond Pattern for Exposed Masonry: Unless otherwise indicated, lay exposed masonry in running bond; do not use units with less-than-nominal 4-inch (100-mm) horizontal face dimensions at corners or jambs.

C. Lay concealed masonry with all units in a wythe in running bond or bonded by lapping not less than 4 inches (100 mm). Bond and interlock each course of each wythe at corners. Do not use units with less-than-nominal 4-inch (100-mm) horizontal face dimensions at corners or jambs.

D. Stopping and Resuming Work: Stop work by stepping back units in each course from those in course below; do not tooth. When resuming work, clean masonry surfaces that are to receive mortar, remove loose masonry units and mortar, and wet brick if required before laying fresh masonry.

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 of metal 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 24 inches (600 mm) under bearing plates, beams, lintels, posts, and similar items unless otherwise indicated.

I. Build non-load-bearing interior partitions full height of story to underside of solid floor or roof structure 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 provide 1/2-inch (13-mm) clearance between end of anchor rod and end of tube. Space anchors 48 inches (1200 mm) o.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 approaches final position.

4. At fire-rated partitions, treat joint between top of partition and underside of structure above to comply with Section 078443 "Joint Firestopping."

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3.5 MORTAR BEDDING AND JOINTING

A. Lay hollow CMUs as follows:

1. Bed face shells in mortar and make head joints of depth equal to bed joints.

2. Bed webs in mortar in all courses of piers, columns, and pilasters.

3. Bed webs in mortar in grouted masonry, including starting course on footings.

4. Fully bed entire units, including areas under cells, at starting course on footings where cells are not grouted.

B. Lay solid CMUs with completely filled bed and head joints; butter ends with sufficient mortar to fill head joints and shove into place. Do not deeply furrow bed joints or slush head joints.

C. Tool exposed joints slightly concave when thumbprint hard, using a jointer larger than joint thickness unless otherwise indicated.

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

E. Cut joints flush where indicated to receive waterproofing unless otherwise indicated.

3.6 MASONRY-JOINT REINFORCEMENT

A. General: Install entire length of longitudinal side rods in mortar with a minimum cover of 5/8 inch (16 mm) on exterior side of walls, 1/2 inch (13 mm) elsewhere. Lap reinforcement a minimum of 6 inches (150 mm).

1. Space reinforcement not more than 16 inches (406 mm) o.c.

2. Provide reinforcement not more than 8 inches (203 mm) above and below wall openings and extending 12 inches (305 mm) 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.

3.7 ANCHORING MASONRY TO STRUCTURAL STEEL AND CONCRETE

A. Anchor masonry to structural steel and concrete, where masonry abuts or faces structural steel or concrete, to comply with the following:

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1. Provide an open space not less than 1/2 inch (13 mm) wide between masonry and structural steel or concrete unless otherwise indicated. Keep open space free of mortar and other rigid materials.

2. Anchor masonry with anchors embedded in masonry joints and attached to structure.

3. Space anchors as indicated, but not more than 24 inches (610 mm) o.c. vertically and 36 inches (915 mm) o.c. horizontally.

3.8 REINFORCED UNIT MASONRY INSTALLATION

A. Temporary Formwork and Shores: Construct formwork and shores as needed to support reinforced 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 of reinforced masonry.

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

B. Placing Reinforcement: Comply with requirements in TMS 602/ACI 530.1/ASCE 6.

C. Grouting: Do not place grout until entire height of masonry to be grouted has attained enough strength to resist grout pressure.

1. Comply with requirements in TMS 602/ACI 530.1/ASCE 6 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 (1219 mm).

3.9 FIELD QUALITY CONTROL

A. Testing and Inspecting: Contractor to perform tests and inspections and prepare reports.

Retesting of materials that fail to comply with specified requirements shall be done at Contractor's expense.

B. Inspections: Special inspections according to Level B in TMS 402/ACI 530/ASCE 5.

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, and locations of reinforcement.

3. Place grout only after inspectors have verified proportions of site-prepared grout.

C. Testing Frequency: One set of tests for each 5000 sq. ft. (464 sq. m) of wall area or portion thereof.

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

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E. Mortar Test (Property Specification): For each mix provided, according to ASTM C 780. Test mortar for compressive strength.

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

G. Prism Test: For each type of construction provided, according to ASTM C 1314 at 7 days and at 28 days.

3.10 REPAIRING, POINTING, AND CLEANING

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

B. Pointing: During the tooling of joints, enlarge voids and holes, except weep holes, and completely fill with mortar. Point up joints, including corners, openings, and adjacent construction, to provide a neat, uniform appearance. Prepare joints for sealant application, where indicated.

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

D. 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. Test cleaning methods on sample wall panel; leave one-half of panel uncleaned for comparison purposes. Obtain Architect's approval of sample cleaning before proceeding with cleaning of masonry.

3. Protect adjacent stone and non-masonry surfaces from contact with cleaner by covering them with liquid strippable masking agent or polyethylene film and waterproof masking tape.

4. Wet wall surfaces with water before applying cleaners; remove cleaners promptly by rinsing surfaces thoroughly with clear water.

5. Clean concrete masonry by applicable cleaning methods indicated in NCMA TEK 8-4A.

3.11 MASONRY WASTE DISPOSAL

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

B. Waste Disposal as Fill Material: Dispose of clean masonry waste, including excess or soil-contaminated sand, waste mortar, and broken masonry units, by crushing and mixing with fill material as fill is placed.

1. 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 Section 312000 "Earth Moving."

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3. Do not dispose of masonry waste as fill within 18 inches (450 mm) of finished grade.

C. Masonry Waste Recycling: Return broken CMUs not used as fill to manufacturer for recycling.

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

END OF SECTION 042200

055000 - 1 METAL FABRICATIONS, Rev. 1

SECTION 055000 - METAL FABRICATIONS, Rev. 1

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Steel framing and supports for ceiling-hung toilet compartments.

2. Steel framing and supports for countertops.

3. Steel base adhered to GWB (BA-2)

4. Steel Platform at East Tower Exit Door

5. Light gauge steel framing to support sprinklers, diffusers, track lighting and metal cover plates in First floor Exhibit Area Ceiling.

6. Steel framing and supports for mechanical and electrical equipment.

7. Steel framing and supports for applications where framing and supports are not specified in other Sections.

8. Shelf angles.

9. Miscellaneous steel trim including steel edgings.

10. Metal bollards.

11. Loose bearing and leveling plates for applications where they are not specified in other

Sections.

B. Products furnished, but not installed, under this Section include the following:

1. Loose steel lintels.

2. Anchor bolts, steel pipe sleeves, slotted-channel inserts, and wedge-type inserts indicated to be cast into concrete or built into unit masonry.

3. Steel weld plates and angles for casting into concrete for applications where they are not specified in other Sections.

C. Related Requirements:

1. Section 042000 "Unit Masonry" for installing loose lintels, anchor bolts, and other items built into unit masonry.

1.3 COORDINATION

A. Coordinate selection of shop primers with topcoats to be applied over them. Comply with paint and coating manufacturers' written recommendations to ensure that shop primers and topcoats are compatible with one another.

http://contact.arcomnet.com/ContentContact.aspx?sect=055000&ver=12/01/16&format=FL&sid=13255

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B. Coordinate installation of metal fabrications that are anchored to or that receive other work.

Furnish setting drawings, templates, and directions for installing anchorages, including sleeves, concrete inserts, anchor bolts, and items with integral anchors, that are to be embedded in concrete or masonry. Deliver such items to Project site in time for installation.

1.4 ACTION SUBMITTALS

A. Product Data: For the following:

1. Nonslip aggregates and nonslip-aggregate surface finishes.

B. Shop Drawings: Show fabrication and installation details. Include plans, elevations, sections, and details of metal fabrications and their connections. Show anchorage and accessory items.

Provide Shop Drawings for the following:

1. Steel framing and supports for ceiling-hung toilet compartments.

2. Steel framing and supports for countertops.

3. Steel wall base adhered to GWB.

4. Steel framing and supports for mechanical and electrical equipment.

5. Steel framing and supports for applications where framing and supports are not specified in other Sections.

6. Abrasive metal nosings

7. Steel shapes for supporting elevator door sills.

8. Shelf angles.

9. Metal bollards.

10. Loose steel lintels.

1.5 INFORMATIONAL SUBMITTALS

A. Mill Certificates: Signed by stainless-steel manufacturers, certifying that products furnished comply with requirements.

B. Welding certificates.

C. Paint Compatibility Certificates: From manufacturers of topcoats applied over shop primers, certifying that shop primers are compatible with topcoats.

D. Welding Qualifications: Qualify procedures and personnel according to the following:

1. AWS D1.1/D1.1M, "Structural Welding Code - Steel."

2. AWS D1.2/D1.2M, "Structural Welding Code - Aluminum."

3. AWS D1.6/D1.6M, "Structural Welding Code - Stainless Steel."

1.6 FIELD CONDITIONS

A. Field Measurements: Verify actual locations of walls and other construction contiguous with metal fabrications by field measurements before fabrication.

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PART 2 - PRODUCTS

2.1 METALS

A. Metal Surfaces, General: Provide materials with smooth, flat surfaces unless otherwise indicated. For metal fabrications exposed to view in the completed Work, provide materials without seam marks, roller marks, rolled trade names, or blemishes.

B. Steel Plates, Shapes, and Bars: ASTM A 36/A 36M.

C. Stainless-Steel Sheet, Strip, and Plate: ASTM A 240/A 240M or ASTM A 666, Type 316L.

D. Stainless-Steel Bars and Shapes: ASTM A 276, Type 304.

E. Rolled-Steel Floor Plate: ASTM A 786/A 786M, rolled from plate complying with ASTM A 36/A 36M or ASTM A 283/A 283M, Grade C or D.

F. Steel Tubing: ASTM A 500/A 500M, cold-formed steel tubing.

G. Steel Pipe: ASTM A 53/A 53M, Standard Weight (Schedule 40) unless otherwise indicated.

H. Zinc-Coated Steel Wire Rope: ASTM A 741.

1. Wire-Rope Fittings: Hot-dip galvanized-steel connectors with capability to sustain, without failure, a load equal to minimum breaking strength of wire rope with which they are used.

I. Cast Iron: Either gray iron, ASTM A 48/A 48M, or malleable iron, ASTM A 47/A 47M, unless otherwise indicated.

J. Aluminum Plate and Sheet: ASTM B 209 (ASTM B 209M), Alloy 6061-T6.

K. Aluminum Extrusions: ASTM B 221 (ASTM B 221M), Alloy 6063-T6.

L. Aluminum-Alloy Rolled Tread Plate: ASTM B 632/B 632M, Alloy 6061-T6.

M. Aluminum Castings: ASTM B 26/B 26M, Alloy 443.0-F.

N. Bronze Extrusions: ASTM B 455, Alloy UNS No. C38500 (extruded architectural bronze).

O. Bronze Castings: ASTM B 584, Alloy UNS No. C83600 (leaded red brass) or No. C84400 (leaded semi-red brass).

P. Nickel Silver Extrusions: ASTM B 151/B 151M, Alloy UNS No. C74500.

Q. Nickel Silver Castings: ASTM B 584, Alloy UNS No. C97600 (20 percent leaded nickel bronze).

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2.2 FASTENERS

A. General: Unless otherwise indicated, provide Type 316 stainless-steel fasteners for exterior use and zinc-plated fasteners with coating complying with ASTM B 633 or ASTM F 1941 (ASTM F 1941M), Class Fe/Zn 5, at exterior walls. Select fasteners for type, grade, and class required.

1. Provide stainless-steel fasteners for fastening aluminum.

2. Provide stainless-steel fasteners for fastening stainless steel.

3. Provide stainless-steel fasteners for fastening nickel silver.

4. Provide bronze fasteners for fastening bronze.

B. Steel Bolts and Nuts: Regular hexagon-head bolts, ASTM A 307, Grade A (ASTM F 568M, Property Class 4.6); with hex nuts, ASTM A 563 (ASTM A 563M); and, where indicated, flat washers.

C. Steel Bolts and Nuts: Regular hexagon-head bolts, ASTM A 325, Type 3 (ASTM A 325M, Type 3); with hex nuts, ASTM A 563, Grade C3 (ASTM A 563M, Class 8S3); and, where indicated, flat washers.

D. Stainless-Steel Bolts and Nuts: Regular hexagon-head annealed stainless-steel bolts, ASTM F 593 (ASTM F 738M); with hex nuts, ASTM F 594 (ASTM F 836M); and, where indicated, flat washers; Alloy Group 1 (A1).

E. Anchor Bolts: ASTM F 1554, Grade 36, of dimensions indicated; with nuts, ASTM A 563 (ASTM A 563M); and, where indicated, flat washers.

1. Hot-dip galvanize or provide mechanically deposited, zinc coating where item being fastened is indicated to be galvanized.

F. Anchors, General: Anchors capable of sustaining, without failure, a load equal to six times the load imposed when installed in unit masonry and four times the load imposed when installed in concrete, as determined by testing according to ASTM E 488/E 488M, conducted by a qualified independent testing agency.

G. Cast-in-Place Anchors in Concrete: Either threaded type or wedge type unless otherwise indicated; galvanized ferrous castings, either ASTM A 47/A 47M malleable iron or ASTM A 27/A 27M cast steel. Provide bolts, washers, and shims as needed, all hot-dip galvanized per ASTM F 2329.

H. Post-Installed Anchors: Torque-controlled expansion anchors.

1. Material for Interior Locations: Carbon-steel components zinc plated to comply with ASTM B 633 or ASTM F 1941 (ASTM F 1941M), Class Fe/Zn 5, unless otherwise indicated.

2. Material for Exterior Locations and Where Stainless Steel Is Indicated: Alloy Group 1 (A1) stainless-steel bolts, ASTM F 593 (ASTM F 738M), and nuts, ASTM F 594

(ASTM F 836M).

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2.3 MISCELLANEOUS MATERIALS

A. Shop Primers: Universal Shop Primer: Fast-curing, lead- and chromate-free, universal modified-alkyd primer complying with MPI#79 and compatible with topcoat.

1. Use primer containing pigments that make it easily distinguishable from zinc-rich primer.

B. Water-Based Primer: Emulsion type, anticorrosive primer for mildly corrosive environments that is resistant to flash rusting when applied to cleaned steel, complying with MPI#107 and compatible with topcoat.

C. Shop Primer for Galvanized Steel: Primer formulated for exterior use over zinc-coated metal and compatible with finish paint systems indicated.

D. Galvanizing Repair Paint: High-zinc-dust-content paint complying with SSPC-Paint 20 and compatible with paints specified to be used over it.

E. Bituminous Paint: Cold-applied asphalt emulsion complying with ASTM D 1187/D 1187M.

F. Nonshrink, Nonmetallic Grout: Factory-packaged, nonstaining, noncorrosive, nongaseous grout complying with ASTM C 1107/C 1107M. Provide grout specifically recommended by manufacturer for interior and exterior applications.

G. Concrete: Comply with requirements in Section 033000 "Cast-in-Place Concrete" for normal-weight, air-entrained, concrete with a minimum 28-day compressive strength of 3000 psi (20 MPa).

2.4 FABRICATION, GENERAL

A. Shop Assembly: Preassemble items in the shop to greatest extent possible. Disassemble units only as necessary for shipping and handling limitations. Use connections that maintain structural value of joined pieces. Clearly mark units for reassembly and coordinated installation.

B. Cut, drill, and punch metals cleanly and accurately. Remove burrs and ease edges to a radius of approximately 1/32 inch (1 mm) unless otherwise indicated. Remove sharp or rough areas on exposed surfaces.

C. Form bent-metal corners to smallest radius possible without causing grain separation or otherwise impairing work.

D. Form exposed work with accurate angles and surfaces and straight edges.

E. Weld corners and seams continuously to comply with the following:

1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap.

3. Remove welding flux immediately.

055000 - 6

4. At exposed connections, finish exposed welds and surfaces smooth and blended so no roughness shows after finishing and contour of welded surface matches that of adjacent surface.

F. Form exposed connections with hairline joints, flush and smooth, using concealed fasteners or welds where possible. Where exposed fasteners are required, use Phillips flat-head (countersunk) fasteners unless otherwise indicated. Locate joints where least conspicuous.

G. Fabricate seams and other connections that are exposed to weather in a manner to exclude water. Provide weep holes where water may accumulate.

H. Cut, reinforce, drill, and tap metal fabrications as indicated to receive finish hardware, screws, and similar items.

I. Provide for anchorage of type indicated; coordinate with supporting structure. Space anchoring devices to secure metal fabrications rigidly in place and to support indicated loads.

J. Where units are indicated to be cast into concrete or built into masonry, equip with integrally welded steel strap anchors, 1/8 by 1-1/2 inches (3.2 by 38 mm), with a minimum 6-inch (150-

mm) embedment and 2-inch (50-mm) hook, not less than 8 inches (200 mm) from ends and corners of units and 24 inches (600 mm) o. c., unless otherwise indicated.

2.5 MISCELLANEOUS FRAMING AND SUPPORTS

A. General: Provide steel framing and supports not specified in other Sections as needed to complete the Work.

B. Fabricate units from steel shapes, plates, and bars of welded construction unless otherwise indicated. Fabricate to sizes, shapes and profiles indicated and as necessary to receive adjacent construction.

1. Fabricate units from slotted channel framing where indicated.

2. Furnish inserts for units installed after concrete is placed.

C. Galvanize miscellaneous framing and supports where indicated.

D. Prime miscellaneous framing and supports with zinc-rich primer where indicated.

2.6 SHELF ANGLES

A. Fabricate shelf angles from steel angles of sizes indicated and for attachment to concrete framing. Provide horizontally slotted holes to receive 3/4-inch (19-mm) bolts, spaced not more than 6 inches (150 mm) from ends and 24 inches (600 mm) o.c., unless otherwise indicated.

1. Provide mitered and welded units at corners.

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2. Provide open joints in shelf angles at expansion and control joints. Make open joint approximately 2 inches (50 mm) larger than expansion or control joint.

B. For cavity walls, provide vertical channel brackets to support angles from backup masonry and concrete.

C. Galvanize and prime shelf angles located in exterior walls.

D. Prime shelf angles located in exterior walls with zinc-rich primer.

E. Furnish wedge-type concrete inserts, complete with fasteners, to attach shelf angles to cast-in-place concrete.

2.7 MISCELLANEOUS STEEL TRIM

A. Unless otherwise indicated, fabricate units from steel shapes, plates, and bars of profiles shown with continuously welded joints and smooth exposed edges. Miter corners and use concealed field splices where possible.

B. Provide cutouts, fittings, and anchorages as needed to coordinate assembly and installation with other work.

1. Provide with integrally welded steel strap anchors for embedding in concrete or masonry construction.

C. Galvanize exterior miscellaneous steel trim.

D. Prime exterior miscellaneous steel trim with zinc-rich primer.

2.8 STEEL WALL BASE ADHERED TO GWB (BA-2)

A. Material: Steel sheet, 16 ga. (0.053 inches [1.3 mm]), cold rolled.

1. Height: 4 inches (101.6 mm).

2. Length: 12 feet (3.65 m.) and custom cuts as required.

3. Finish: Felt Magnet finish: Apply gun metal bluing on mild steel. Burnish surface and rinse thoroughly. Apply finish in shop.

2.9 STEEL PLATFORM AT EAST TOWER EXIT DOOR

A. Materials:

1. Steel angle frame around bar grating: 4” x 6” x 3/8” (101 x 152 x 9.5 mm).

2. Steel angle sub-frame supporting long dimension of bar grating: 4” x 4” x 3/8” (101 x 101 x 9.5 mm).

3 Steel bracket arms (4) supporting frame closest to building: ½” x 6” (12.7 x 152mm) steel bar.

4. Steel Grating Bar Grating: Welded, close mesh, ADA 11-W-4 spacing.

a. Bearing Bar Size: 1” x 3/16” (25..4 x 4.7 mm).

b. Bearing Bar Spacing: 11/16” (17.4 mm) O. C

055000 - 8

c. Clear Space Between Bearing Bars: ½” (12.7 mm)

d. Cross Bar: Twisted Rod.

e. Cross Bar Spacing: 4”…