Specification_-_09_5113_ACOUSTICAL_PANEL_CEILINGS.pdf

Green Federal Building Consolidation Project 600 Arch Street

Philadelphia, Pennsylvania

GSA # GS-03P-14-AZ-C-0020

ACOUSTICAL PANEL CEILINGS 095113 - 1

27 MAY 2016

PROPERTY OF THE U.S. GOVERNMENT - FOR OFFICIAL USE ONLY

Do not remove this notice - Properly destroy documents when no longer needed

SECTION 095113 - ACOUSTICAL PANEL CEILINGS

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. This Section includes acoustical panels and exposed suspension systems for ceilings.

1.3 DEFINITIONS

A. AC: Articulation Class.

B. CAC: Ceiling Attenuation Class.

C. LR: Light Reflectance coefficient.

D. NRC: Noise Reduction Coefficient.

1.4 SUBMITTALS

A. Product Data: For each type of product indicated.

B. Coordination Drawings: Reflected ceiling plans, drawn to scale, on which the following items are shown and coordinated with each other, based on input from installers of the items involved:

1. Ceiling suspension system members.

2. Method of attaching hangers to building structure.

a. Furnish layouts for cast-in-place anchors, clips, and other ceiling attachment devices whose installation is specified in other Sections.

3. Ceiling-mounted items including lighting fixtures, diffusers, grilles, speakers, sprinklers, access panels, and special moldings.

4. Minimum Drawing Scale: 1/4 inch = 1 foot.

C. Samples for Initial Selection: For components with factory-applied color finishes.

D. Samples for Verification: For each component indicated and for each exposed finish required, prepared on Samples of size indicated below.

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1. Acoustical Panel: Set of 6-inch- square Samples of each type, color, pattern, and texture.

2. Exposed Suspension System Members, Moldings, and Trim: Set of 12-inch- long Samples of each type, finish, and color.

E. Sustainable Design Submittals:

1. Documentation from the manufacturer indicating percentages by weight of post-consumer and pre-consumer recycled content. Include statement indicating costs for each product having recycled content.

2. Documentation from the manufacturer indicating location of product manufacturing, extraction and processing of materials. Documentation from the manufacturer indicating the fraction by weight of material that is considered regional. Include statement indicating costs for each product contributing as regional.

F. Qualification Data: For testing agency.

G. Field quality-control test reports.

H. Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified testing agency, for each acoustical panel ceiling.

I. Maintenance Data: For finishes to include in maintenance manuals.

1.5 QUALITY ASSURANCE

A. Acoustical Testing Agency Qualifications: An independent testing laboratory, or an NVLAP-accredited laboratory, with the experience and capability to conduct the testing indicated.

NVLAP-accredited laboratories must document accreditation, based on a "Certificate of Accreditation" and a "Scope of Accreditation" listing the test methods specified.

B. Source Limitations:

1. Acoustical Ceiling Panel: Obtain each type through one source from a single manufacturer.

2. Suspension System: Obtain each type through one source from a single manufacturer.

C. Source Limitations: Obtain each type of acoustical ceiling panel and supporting suspension system through one source from a single manufacturer.

D. Fire-Test-Response Characteristics: Provide acoustical panel ceilings that comply with the following requirements:

1. Fire-Resistance Characteristics: Where indicated, provide acoustical panel ceilings identical to those of assemblies tested for fire resistance per ASTM E 119 by UL or another testing and inspecting agency acceptable to authorities having jurisdiction.

a. Fire-Resistance Ratings: Indicated by design designations from UL's "Fire Resistance Directory" or from the listings of another testing and inspecting agency.

b. Identify materials with appropriate markings of applicable testing and inspecting agency.

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2. Surface-Burning Characteristics: Provide acoustical panels with the following surface-burning characteristics complying with ASTM E 1264 for Class A materials as determined by testing identical products per ASTM E 84:

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver acoustical panels, suspension system components, and accessories to Project site in original, unopened packages and store them in a fully enclosed, conditioned space where they will be protected against damage from moisture, humidity, temperature extremes, direct sunlight, surface contamination, and other causes.

B. Before installing acoustical panels, permit them to reach room temperature and a stabilized moisture content.

C. Handle acoustical panels carefully to avoid chipping edges or damaging units in any way.

1.7 PROJECT CONDITIONS

A. Environmental Limitations: Do not install acoustical panel ceilings until spaces are enclosed and weatherproof, wet work in spaces is complete and dry, work above ceilings is complete, and ambient temperature and humidity conditions are maintained at the levels indicated for Project when occupied for its intended use.

1. Pressurized Plenums: Operate ventilation system for not less than 48 hours before beginning acoustical panel ceiling installation.

1.8 COORDINATION

1. Coordinate layout and installation of acoustical panels and suspension system with other construction that penetrates ceilings or is supported by them, including light fixtures, HVAC equipment, fire-suppression system, and partition assemblies.

1.9 EXTRA MATERIALS

A. Furnish extra materials described below that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.

1. Acoustical Ceiling Panels: Full-size panels equal to 2.0 percent of quantity installed.

2. Suspension System Components: Quantity of each exposed component equal to 2.0 percent of quantity installed.

3. Hold-Down Clips: Equal to 2.0 percent of quantity installed.

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PART 2 - PRODUCTS

2.1 ACOUSTICAL PANELS, GENERAL

A. Sustainable Design requirements:

1. Provide panels with a minimum 25% recycled content, based on sum of post-consumer recycled content plus one-half of the pre- consumer recycled content.

2. A minimum 25% of panels and its subcomponents must be manufactured and extracted within 500 miles of the project site.

B. Acoustical Panel Standard: Provide manufacturer's standard panels of configuration indicated that comply with ASTM E 1264 classifications as designated by types, patterns, acoustical ratings, and light reflectances, unless otherwise indicated.

1. Mounting Method for Measuring NRC: Type E-400; plenum mounting in which face of test specimen is 15-3/4 inches away from test surface per ASTM E 795.

C. Acoustical Panel Colors and Patterns: Match appearance characteristics indicated for each product type.

1. Where appearance characteristics of acoustical panels are indicated by referencing pattern designations in ASTM E 1264 and not manufacturers' proprietary product designations, provide products selected by Architect from each manufacturer's full range that comply with requirements indicated for type, pattern, color, light reflectance, acoustical performance, edge detail, and size.

D. Broad Spectrum Antimicrobial Fungicide and Bactericide Treatment: Provide acoustical panels treated with manufacturer's standard antimicrobial formulation that inhibits fungus, mold, mildew, and gram-positive and gram-negative bacteria and showing no mold, mildew, or bacterial growth when tested according to ASTM D 3273 and evaluated according to ASTM D 3274 or ASTM G 21.

E. Antimicrobial Fungicide Treatment: Provide acoustical panels with face and back surfaces coated with antimicrobial treatment consisting of manufacturer's standard formulation with fungicide added to inhibit growth of mold and mildew and showing no mold or mildew growth when tested according to ASTM D 3273 and evaluated according to ASTM D 3274 or

ASTM G 21.

F. Wet Locations: Where ceiling tiles are indicated in wet locations or in areas where condensation is possible (i.e. locker/shower rooms, etc.), provide materials capable of achieving the following:

1. Resistant to the growth of mold and mildew

2. Washable, Scrubbable and Soil-resistant

3. Resistance to chemical fumes

4. Superior resistance to sagging in high humidity conditions including standing water and outdoor applications

5. 30-Year Limited System Warranty against visible sag and mold and mildew

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2.2 ACOUSTICAL PANELS FOR ACOUSTICAL PANEL CEILING: ACT-1.

A. Basis-of-Design Product: Subject to compliance with requirements, provide Armstrong World Industries Lyra Beveled Tegular panels 9/16 inch or a comparable product by one of the following:

1. BPB USA.

2. Chicago Metallic Corporation.

3. Ecophon CertainTeed, Inc.

4. Tectum Inc.

5. USG Interiors, Inc.

B. Classification: Provide panels complying with ASTM E 1264 for type, form, and pattern as follows:

1. Type and Form: Type XII, glass-fiber base with membrane-faced overlay; Form 2.

2. Pattern: Smooth Texture

C. Fire Performance:

1. Meet ASTM E84 surface burning characteristics. Flame Spread Index 25 or less. Smoke

Developed Index 50 or less (UL labeled.)

D. Color: White.

E. NRC: Not less than 0.90.

F. AC: Not less than 200.

G. Edge/Joint Detail: Reveal sized to fit flange of exposed suspension system members

H. Thickness: 1 inch.

I. Modular Size: 24 by 96 inches.

J. Suspension SYSTEM: 9/16 INCH Suprafine.

K. Antimicrobial Treatment: Broad spectrum fungicide and bactericide based.

2.3 ACOUSTICAL PANELS FOR ACOUSTICAL PANEL CEILING: ACT-2.

A. Basis-of-Design Product: Subject to compliance with requirements, provide Armstrong World Industries Lyra Beveled Tegular panels 9/16 inch or a comparable product by one of the following:

1. BPB USA.

2. Chicago Metallic Corporation.

3. Ecophon CertainTeed, Inc.

4. Tectum Inc.

5. USG Interiors, Inc.

B. Classification: Provide panels complying with ASTM E 1264 for type, form, and pattern as follows:

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1. Type and Form: Type XII, glass-fiber base with membrane-faced overlay; Form 2.

2. Pattern: Smooth Texture

C. Fire Performance:

1. Meet ASTM E84 surface burning characteristics. Flame Spread Index 25 or less. Smoke

Developed Index 50 or less (UL labeled.)

D. Color: White.

E. NRC: Not less than 0.90.

F. AC: Not less than 200.

G. Edge/Joint Detail: Reveal sized to fit flange of exposed suspension system members

H. Retain paragraph above or first paragraph below. For most panels, retain above. For glass-fiber-based panels, retain below.

I. Thickness: 1 inch.

J. Modular Size: 24 by 48 inches.

K. Antimicrobial Treatment: Broad spectrum fungicide and bactericide based.

2.4 ACOUSTICAL PANELS FOR ACOUSTICAL PANEL CEILING: ACT-3.

A. Basis-of-Design Product: Subject to compliance with requirements, provide Armstrong World Industries Calla Beveled Tegular panels 9/16 inch or a comparable product by one of the following:

1. BPB USA.

2. Chicago Metallic Corporation.

3. Ecophon CertainTeed, Inc.

4. Tectum Inc.

5. USG Interiors, Inc.

B. Classification: Provide panels complying with ASTM E 1264 for type, form, and pattern as follows:

1. Type and Form: Type IV wet-formed mineral fiber base with acoustically transparent membrane; Form 2.

2. Pattern: Smooth Texture, Pattern E

C. Fire Performance:

1. Meet ASTM E84 surface burning characteristics. Flame Spread Index 25 or less.

Smoke Developed Index 50 or less (UL labeled.)

D. Color: White.

E. NRC: Not less than 0.85.

F. AC: Not less than 200.

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G. Edge/Joint Detail: Reveal sized to fit flange of exposed suspension system members

H. Thickness: 1 inch.

I. Modular Size: 24 by 48 inches.

J. Suspension SYSTEM: 9/16 INCH Suprafine.

K. Antimicrobial Treatment: Broad spectrum fungicide and bactericide based

2.5 ACOUSTICAL PANELS FOR ACOUSTICAL PANEL CEILING: ACT-4.

A. Basis-of-Design Product: Subject to compliance with requirements, provide Armstrong World Industries Canyon Beveled Tegular panels 9/16 inch or a comparable product by one of the following:

1. BPB USA.

2. Chicago Metallic Corporation.

3. Ecophon CertainTeed, Inc.

4. Tectum Inc.

5. USG Interiors, Inc.

B. Classification: Provide panels complying with ASTM E 1264 for type, form, and pattern as follows:

1. Type and Form: Type IV mineral fiber base with acoustically transparent membrane; Form 2.

2. Pattern: Smooth Texture, Pattern E

C. Fire Performance:

1. Meet ASTM E84 surface burning characteristics. Flame Spread Index 25 or less.

Smoke Developed Index 50 or less (UL labeled.)

D. Color: White.

E. NRC: Not less than 0.60.

F. AC: Not less than 200.

G. Edge/Joint Detail: Reveal sized to fit flange of exposed suspension system members

H. Thickness: 5/8 inch.

I. Modular Size: 24 by 48 inches.

J. Suspension SYSTEM: 9/16 INCH Suprafine.

K. Antimicrobial Treatment: Broad spectrum fungicide and bactericide based

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2.6 ACOUSTICAL PANELS FOR ACOUSTICAL PANEL CEILING: ACT-5.

A. Basis-of-Design Product: Subject to compliance with requirements, provide Armstrong World Industries Ceramaguard Fine Fissured Perforated square lay-in panels 15/16 inch or a comparable product by one of the following:

1. BPB USA.

2. Chicago Metallic Corporation.

3. Ecophon CertainTeed, Inc.

4. Tectum Inc.

5. USG Interiors, Inc.

B. Classification: Provide panels complying with ASTM E 1264 for type, form, and pattern as follows:

1. Type and Form: Type XX high density ceramic-like composition with scrubbable finish..

2. Pattern: Fine Fissured Perforated, Pattern C E

C. Fire Performance:

1. Meet ASTM E84 surface burning characteristics. Flame Spread Index 25 or less.

Smoke Developed Index 50 or less (UL labeled.)

D. Color: White.

E. NRC: Not less than 0.55.

F. AC: Not less than 200.

G. Edge/Joint Detail: Reveal sized to fit flange of exposed suspension system members

H. Thickness: 5/8 inch.

I. Modular Size: 24 by 24 inches.

J. Suspension SYSTEM: 15/16 INCH Prelude Plus XL Fire Guard.

K. Antimicrobial Treatment: Broad spectrum fungicide and bactericide based

2.7 METAL SUSPENSION SYSTEMS, GENERAL

A. Metal Suspension System Standard: Provide manufacturer's standard direct-hung metal suspension systems of types, structural classifications, and finishes indicated that comply with applicable requirements in ASTM C 635.

B. Finishes and Colors, General: Comply with NAAMM's "Metal Finishes Manual for Architectural and Metal Products" for recommendations for applying and designating finishes. Provide manufacturer's standard factory-applied finish for type of system indicated.

1. High-Humidity Finish: Comply with ASTM C 635 requirements for "Coating Classification for Severe Environment Performance" where high-humidity finishes are indicated.

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C. Attachment Devices: Size for five times the design load indicated in ASTM C 635, Table 1, "Direct Hung," unless otherwise indicated. Comply with seismic design requirements.

a. Corrosion Protection: Carbon-steel components zinc plated to comply with ASTM B 633, Class Fe/Zn 5 (0.005 mm) for Class SC 1 service condition.

2. Power-Actuated Fasteners in Concrete: Fastener system of type suitable for application indicated, fabricated from corrosion-resistant materials, with clips or other accessory devices for attaching hangers of type indicated, and with capability to sustain, without failure, a load equal to 10 times that imposed by ceiling construction, as determined by testing per ASTM E 1190, conducted by a qualified testing and inspecting agency.

D. Wire Hangers, Braces, and Ties: Provide wires complying with the following requirements:

1. Zinc-Coated, Carbon-Steel Wire: ASTM A 641/A 641M, Class 1 zinc coating, soft temper.

2. Size: Select wire diameter so its stress at 3 times hanger design load (ASTM C 635, Table 1, "Direct Hung") will be less than yield stress of wire, but provide not less than 0.106-inch- diameter wire.

E. Hanger Rods: Mild steel, zinc coated or protected with rust-inhibitive paint.

F. Angle Hangers: Angles with legs not less than 7/8 inch wide; formed with 0.04-inch- thick, galvanized steel sheet complying with ASTM A 653/A 653M, G90 coating designation; with bolted connections and 5/16-inch- diameter bolts.

G. Seismic Stabilizer Bars: Manufacturer's standard perimeter stabilizers designed to accommodate seismic forces.

H. Seismic Struts: Manufacturer's standard compression struts designed to accommodate seismic forces.

I. Seismic Clips: Manufacturer's standard seismic clips designed and spaced to secure acoustical panels in-place.

J. Hold-Down Clips: Where indicated, provide manufacturer's standard hold-down clips spaced 24 inches o.c. on all cross tees.

K. Impact Clips: Where indicated, provide manufacturer's standard impact-clip system designed to absorb impact forces against acoustical panels.

2.8 METAL SUSPENSION SYSTEM FOR ACOUSTICAL PANEL CEILING

A. Basis-of-Design Product for ACT-1: Subject to compliance with requirements, provide Armstrong World Industries Silhouette Bolt Slot or comparable system as approved by Architect.

1. Components:

a. Main beams and cross tees, base metal and end detail, fabricated from commercial quality hot dipped galvanized steel complying with ASTM A 653. Main beams and cross tees are double-web steel construction with exposed flange design. Exposed surfaces chemically cleansed, capping prefinished galvanized

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steel in baked polyester paint. Main beams and cross tees shall have rotary stitching.

1) Structural Classification: Heavy-duty system.

2) Color: White and match the actual color of the selected ceiling tile, unless noted otherwise.

3) End Condition of Cross Runners: Butt-edge type.

4) Face Design: Flat, flush.

5) Cap Material: Steel cold-rolled sheet.

6) Cap Finish: Painted in color as selected from manufacturer's full range.

7) Acceptable Product: Silhouette XL 9/16" Bolt Slot - 1/8" Reveal as manufactured by Armstrong World Industries

B. Basis-of-Design Product for ACT-2: Subject to compliance with requirements, provide Armstrong World Industries Interlude XL HRC or comparable system as approved by Architect.

1. Components:

a. Main beams and cross tees, base metal and end detail, fabricated from commercial quality hot dipped galvanized steel complying with ASTM A 653. Main beams and cross tees are double-web steel construction with exposed flange design. Exposed surfaces chemically cleansed, capping prefinished galvanized steel in baked polyester paint. Main beams and cross tees shall have rotary stitching.

1) Structural Classification: Heavy-duty system.

2) Color: White and match the actual color of the selected ceiling tile, unless noted otherwise.

3) End Condition of Cross Runners: Butt-edge type.

4) Face Design: Flat, flush.

5) Cap Material: Steel cold-rolled sheet.

6) Cap Finish: Painted in color as selected from manufacturer's full range.

7) Acceptable Product: INTERLUDE XL High Recycled Content, 9/16"

Dimensional Tee System as manufactured by Armstrong World Industries

b. Wire for Hangers and Ties:

1) ASTM A 641, Class 1 zinc coating, soft annealed, with a yield stress load of at least time three design load, but not less than 12 gauge.

2.9 METAL EDGE MOLDINGS AND TRIM

A. Roll-Formed, Sheet-Metal Edge Moldings and Trim: Type and profile indicated or, if not indicated, manufacturer's standard moldings for edges and penetrations that comply with seismic design requirements; formed from sheet metal of same material, finish, and color as that used for exposed flanges of suspension system runners.

1. Provide manufacturer's standard edge moldings that fit acoustical panel edge details and suspension systems indicated and that match width and configuration of exposed runners, unless otherwise indicated.

2. For circular penetrations of ceiling, provide edge moldings fabricated to diameter required to fit penetration exactly.

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2.10 ACOUSTICAL SEALANT

A. Acoustical Sealant for Exposed and Concealed Joints: Manufacturer's standard nonsag, paintable, nonstaining latex sealant, with a VOC content of 250 g/L or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24), complying with ASTM C 834 and effective in reducing airborne sound transmission through perimeter joints and openings in building construction as demonstrated by testing representative assemblies according to

ASTM E 90.

B. Acoustical Sealant for Concealed Joints: Manufacturer's standard nondrying, nonhardening, nonskinning, nonstaining, gunnable, synthetic-rubber sealant, with a VOC content of 250 g/L or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24), recommended for sealing interior concealed joints to reduce airborne sound transmission.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates, areas, and conditions, including structural framing to which acoustical panel ceilings attach or abut, with Installer present, for compliance with requirements specified in this and other Sections that affect ceiling installation and anchorage and with requirements for installation tolerances and other conditions affecting performance of acoustical panel ceilings.

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

3.2 PREPARATION

A. Measure each ceiling area and establish layout of acoustical panels to balance border widths at opposite edges of each ceiling. Avoid using less-than-half-width panels at borders, and comply with layout shown on reflected ceiling plans.

3.3 INSTALLATION

A. General: Install acoustical panel ceilings to comply with ASTM C 636 and seismic design requirements indicated, per manufacturer's written instructions and CISCA's "Ceiling Systems Handbook."

1. Fire-Rated Assembly: Install fire-rated ceiling systems according to tested fire-rated design.

B. Suspend ceiling hangers from building's structural members and as follows:

1. Install hangers plumb and free from contact with insulation or other objects within ceiling plenum that are not part of supporting structure or of ceiling suspension system.

2. Splay hangers only where required to miss obstructions; offset resulting horizontal forces by bracing, countersplaying, or other equally effective means.

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3. Splay hangers only where required and, if permitted with fire-resistance-rated ceilings, to miss obstructions; offset resulting horizontal forces by bracing, countersplaying, or other equally effective means.

4. Where width of ducts and other construction within ceiling plenum produces hanger spacings that interfere with location of hangers at spacings required to support standard suspension system members, install supplemental suspension members and hangers in form of trapezes or equivalent devices.

5. Secure wire hangers to ceiling suspension members and to supports above with a minimum of three tight turns. Connect hangers directly either to structures or to inserts, eye screws, or other devices that are secure and appropriate for substrate and that will not deteriorate or otherwise fail due to age, corrosion, or elevated temperatures.

6. Secure flat, angle, channel, and rod hangers to structure, including intermediate framing members, by attaching to inserts, eye screws, or other devices that are secure and appropriate for both structure to which hangers are attached and type of hanger involved.

Install hangers in a manner that will not cause them to deteriorate or fail due to age, corrosion, or elevated temperatures.

7. Do not support ceilings directly from permanent metal forms or floor deck. Fasten hangers to cast-in-place hanger inserts, postinstalled mechanical or adhesive anchors, or power-actuated fasteners that extend through forms into concrete.

8. When steel framing does not permit installation of hanger wires at spacing required, install carrying channels or other supplemental support for attachment of hanger wires.

9. Do not attach hangers to steel deck tabs.

10. Do not attach hangers to steel roof deck. Attach hangers to structural members.

11. Space hangers not more than 48 inches o.c. along each member supported directly from hangers, unless otherwise indicated; provide hangers not more than 8 inches from ends of each member.

12. Size supplemental suspension members and hangers to support ceiling loads within performance limits established by referenced standards and publications.

C. Secure bracing wires to ceiling suspension members and to supports with a minimum of four tight turns. Suspend bracing from building's structural members as required for hangers, without attaching to permanent metal forms, steel deck, or steel deck tabs. Fasten bracing wires into concrete with cast-in-place or postinstalled anchors.

D. Install edge moldings and trim of type indicated at perimeter of acoustical ceiling area and where necessary to conceal edges of acoustical panels.

1. Apply acoustical sealant in a continuous ribbon concealed on back of vertical legs of moldings before they are installed.

2. Screw attach moldings to substrate at intervals not more than 16 inches o.c. and not more than 3 inches from ends, leveling with ceiling suspension system to a tolerance of 1/8 inch in 12 feet. Miter corners accurately and connect securely.

3. Do not use exposed fasteners, including pop rivets, on moldings and trim.

E. Install suspension system runners so they are square and securely interlocked with one another. Remove and replace dented, bent, or kinked members.

F. Install acoustical panels with undamaged edges and fit accurately into suspension system runners and edge moldings. Scribe and cut panels at borders and penetrations to provide a neat, precise fit.

1. Arrange directionally patterned acoustical panels as indicated on reflected ceiling plans

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2. For reveal-edged panels on suspension system runners, install panels with bottom of reveal in firm contact with top surface of runner flanges.

3. Paint cut edges of panel remaining exposed after installation; match color of exposed panel surfaces using coating recommended in writing for this purpose by acoustical panel manufacturer.

4. Install hold-down clips in areas indicated, in areas required by authorities having jurisdiction, and for fire-resistance ratings; space as recommended by panel manufacturer's written instructions, unless otherwise indicated.

5. Install clean-room gasket system in areas indicated, sealing each panel and fixture as recommended by panel manufacturer's written instructions.

6. Protect lighting fixtures and air ducts to comply with requirements indicated for fire-resistance-rated assembly.

3.4 FIELD QUALITY CONTROL

A. Special Inspections: Engage a qualified special inspector to perform the following special inspections and prepare reports:

1. Suspended ceiling system.

2. Hangers, anchors and fasteners.

B. Testing Agency: Engage a qualified testing agency to perform tests and inspections and prepare test reports.

C. Tests and Inspections: Testing and inspecting of completed installations of acoustical panel ceiling hangers and anchors and fasteners shall take place in successive stages, in areas of extent and using methods as follows. Do not proceed with installations of acoustical panel ceiling hangers for the next area until test results for previously completed installations of acoustical panel ceiling hangers show compliance with requirements.

1. Extent of Each Test Area: When installation of ceiling suspension systems on each floor has reached 20 percent completion but no panels have been installed.

a. Within each test area, testing agency will select 1 of every 10 power-actuated fasteners and postinstalled anchors used to attach hangers to concrete and will test them for 200 lbf of tension; it will also select one of every 2 postinstalled anchors used to attach bracing wires to concrete and will test them for 440 lbf of tension.

b. When testing discovers fasteners and anchors that do not comply with requirements, testing agency will test those anchors not previously tested until 20 pass consecutively and then will resume initial testing frequency.

D. Remove and replace acoustical panel ceiling hangers and anchors and fasteners that do not pass tests and inspections and retest as specified above.

3.5 CLEANING

A. Clean exposed surfaces of acoustical panel ceilings, including trim, edge moldings, and suspension system members. Comply with manufacturer's written instructions for cleaning and

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touchup of minor finish damage. Remove and replace ceiling components that cannot be successfully cleaned and repaired to permanently eliminate evidence of damage.

END OF SECTION 095113