09512-Accoustical Ceiling.doc

Ellington Field ANGB

Houston, Texas

Copyright 2000, The American Institute of Architects (AIA)

SECTION 09512

ACOUSTICAL PANEL CEILINGS

This Section uses the term "Architect." Change this term to match that used to identify the design professional as defined in the General and Supplementary Conditions.

Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

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

1.2 SUMMARY

A. This Section includes:

Adjust list below to suit Project.

1. Acoustical ceiling panels.

2. Concealed suspension systems.

3. Wire hangers, fasteners, main runners, cross tees and wall angle moldings.

Delete below if cast-in-place attachment devices are not required for Project or if piercing hangar tabs are specified in Division 5 Section "Steel Deck" for floor deck.

B. Products furnished, but not installed under this Section, include anchors, clips, and other ceiling attachment devices to be cast in concrete at ceilings.

C. Related Sections:

1. Division 9 Section “Gypsum Board Assemblies.”

2. Division 15 Sections – Mechanical Work.

3. Division 16 Sections – Electrical Work.

1.3 DEFINITIONS

Retain abbreviations that remain after this Section has been edited.

A. CAC: Ceiling Attenuation Class.

B. LR: Light Reflectance coefficient.

C. NRC: Noise Reduction Coefficient.

1.4 SUBMITTALS

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

Retain first paragraph and subparagraphs below if Drawings do not include detailed reflected ceiling plans or if Project involves unusual coordination requirements.

Delete paragraph above if colors and other characteristics are preselected and specified or scheduled. Retain paragraph and subparagraphs below with or without above.

Coordinate first paragraph below with qualification requirements in Division 1 Section "Quality Requirements" and as supplemented in "Quality Assurance" Article.

1.5 QUALITY ASSURANCE

Retain first paragraph below if Contractor or manufacturer selects testing agency.

A. Installer Qualifications: Engage an experienced installer who has completed acoustical tile ceilings similar in material, design, and extent to that indicated for this Project and with a record of successful in-service performance.

B. Source Limitations for Ceiling Units: Obtain each acoustical ceiling tile from one source with resources to provide products of consistent quality in appearance and physical properties without delaying the Work.:

Retain paragraph and subparagraphs above or first paragraph below. Generally delete below unless ceiling units will fit only same manufacturer's suspension system. Armstrong World Industries and USG Interiors offer both suspension systems and ceiling units.

C. Source Limitations for Suspension System: Obtain each suspension system from one source with resources to provide products of consistent quality in appearance and physical properties without delaying the Work.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver acoustical tiles, 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 tiles, permit them to reach room temperature and a stabilized moisture content.

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

1.7 PROJECT CONDITIONS

Retain paragraph and subparagraph below to prevent voiding manufacturer's warranty. The limitations below are also necessary for best results in many locations. If construction scheduling or other conditions conflict with requirements below, consider products, such as "Humiguard" by Armstrong World and "ClimaPlus" by USG Interiors, that can be installed under less-than-ideal conditions without voiding warranty. Revise below if humidity-resistant products do not need stringent environmental limitations. See Evaluations and manufacturers' product data and warranties.

A. Environmental Limitations: Do not install acoustical tile 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. Building areas to receive ceilings shall be free of construction debris and dust.

Retain below to comply with CISCA's recommendations for cleaning duct system and protecting ceiling units in pressurized plenums from damage and soiling caused by blowing dirt and dust that may be present when duct system is first operated.

1.8 COORDINATION

A. Coordinate layout and installation of acoustical tiles 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

Extra materials may not be allowed for publicly funded projects.

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.

Revise subparagraphs below to suit Project. If preferred, replace percentage with a specific number of tiles and pieces of each suspension component and their lengths.

1. Acoustical Ceiling Units: Full-size units equal to 2.0 percent (2%) of quantity installed.

2. Suspension System Components: Quantity of each concealed grid and exposed component equal to 2.0 percent (2%) of quantity installed.

1.10 WARRANTIES

Extra materials may not be allowed for publicly funded projects.

A. Acoustical Panels: Submit written warranty executed by the manufacturer, agreeing to repair or replace acoustical panels that fail within the warranty period. Failures include, but are not limited to:

Revise subparagraphs below to suit Project. If preferred, replace percentage with a specific number of tiles and pieces of each suspension component and their lengths.

1. Sagging and warping of acoustical panels.

2. Rusting and manufacturing defects in grid system.

B. Warranty Periods:

Revise subparagraphs below to suit Project. If preferred, replace percentage with a specific number of tiles and pieces of each suspension component and their lengths.

1. Acoustical Panels: One (1) year from date of substantial completion.

2. Grid System: One (1) year from date of substantial completion.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers and products.

Edit this Article with other Part 2 articles in which manufacturers and products, or manufacturers only, are named. See Division 1 Section "Product Requirements" for an explanation of the terms "Available Products," "Products," "Available Manufacturers," and "Manufacturers" and the effect these terms have on "Comparable Product" and "Product Substitution" requirements.

A. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, the products specified on the Interior Finishes Legends in the construction drawings.

2.2 ACOUSTICAL TILES, GENERAL

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

Subparagraph below represents standard mounting referenced in ASTM E 1264. Revise if testing units with another mounting method is required for Project.

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.

B. Acoustical Tile Colors and Patterns: Match appearance characteristics indicated for each product type.

Retain subparagraph below only if patterns are exclusively specified by using pattern designations in ASTM E 1264.

First two articles below are examples of tiles for acoustical tile ceilings. Refer to tables in the Evaluations and use them in combination with manufacturers' catalogs or product data to insert salient characteristics. See Editing Instructions No. 2 and No. 3 in the Evaluations.

Copy first two articles and re-edit them to suit Project. Revise Article titles and text for products with classifications that differ from examples below.

Insert number to complete drawing designation for each product retained below. Use these designations on Drawings to show where each product is required.

2.3 METAL SUSPENSION SYSTEMS, GENERAL

A. Metal Suspension System Standard: Provide manufacturer's standard 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.

Delete subparagraph below if not required. Finish is generally applicable to hot-dip galvanized steel with G60 (Z180) or greater coating and aluminum systems with anodized finish. On Drawings, show where high-humidity finishes are required.

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

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

Subparagraph below does not apply to power-actuated fasteners. Delete if no anchorage to concrete is required or if power-actuated fasteners are acceptable. Verify safety factor with Project's structural engineer. Revise testing methods below if required by authorities having jurisdiction.

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.

Retain second option in subparagraph below if required by authorities having jurisdiction or if desired for extra security and quality (including corrosion allowance). Because large sizes are difficult to work with, their use could result in poor leveling tolerance.

2. Size: Select wire diameter so its stress at three 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.

Delete hanger types in paragraph above and first paragraph below if not required. Insert sizes here or show on Drawings.

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.

2.4 METAL EDGE MOLDINGS AND TRIM

Coordinate first paragraph and subparagraphs below with Part 2 "Manufacturers" Article. Retain "Available" for nonproprietary and delete for semiproprietary specifications.

A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

1. Armstrong World Industries, Inc.

2. Chicago Metallic Corporation.

3. Fry Reglet Corporation.

4. MM Systems, Inc.

5. USG Interiors, Inc.

B. Extruded-Aluminum Edge Moldings and Trim: Where indicated, provide manufacturer's extruded-aluminum edge moldings and trim of profile indicated or referenced by manufacturer's designations, including splice plates, corner pieces, and attachment and other clips, complying with the following requirements:

Revise subparagraphs below to suit Project and products selected; complement by showing profiles on Drawings. Describe products here and insert names of manufacturers or products in Part 2 "Manufacturers" Article.

1. Aluminum Alloy: Alloy and temper recommended by aluminum producer and finisher for type of use and finish indicated, and with not less than the strength and durability properties of aluminum extrusions complying with ASTM B 221/B 221M for alloy and temper 6063-T5.

2. Finish designations prefixed by AA comply with system established by the Aluminum Association for designating aluminum finishes.

Retain one of four finish requirements below, or delete subparagraphs and associated subparagraphs and insert others.

3. Baked-Enamel Finish: AA-C12C42R1x (Chemical Finish: cleaned with inhibited chemicals; Chemical Finish: acid-chromate-fluoride-phosphate conversion coating; Organic Coating: as specified below). Apply baked enamel complying with paint manufacturer's written instructions for cleaning, conversion coating, and painting.

a. Organic Coating: Thermosetting, enamel primer/topcoat system with a minimum dry film thickness of 0.8 to 1.2 mils.

2.5 EXAMINATION

A. Examine substrates, areas, and conditions, including structural framing and substrates to which acoustical tile 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 tile ceilings.

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

C. Do not proceed with installation until all wet work, such as concrete and painting, has been completed and thoroughly dried out.

2.6 PREPARATION

Delete first paragraph below if no glue-up tile.

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

2.7 INSTALLATION, SUSPENDED ACOUSTICAL TILE CEILINGS

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

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.

Delete subparagraph above or first subparagraph below. Retain below only if fire-resistance-rated ceilings are selected.

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

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.

Delete subparagraph above or below unless both types of hangers are required and their locations are indicated on Drawings or by inserts.

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.

Delete subparagraphs below that refer to inapplicable construction types. Revise first subparagraph if power-actuated fasteners are not allowed.

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.

Revise first subparagraph below if structural members are spaced too far apart for hangers and another method is required. For alternatives that may need to be detailed on Drawings, consult structural engineer and refer to CISCA's guidelines. See SDI Publication No. 29 and the Evaluations in Division 5 Section "Steel Deck."

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

9. Space hangers not more than 48 inches (1200 mm) o.c. along each member supported directly from hangers, unless otherwise indicated; provide hangers not more than 8 inches (200 mm) from ends of each member.

First paragraph below is based on requirements by the Division of the State Architect in California, for ceilings in hospitals and schools. Revise or delete if not required.

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 tile ceiling area and where necessary to conceal edges of acoustical units.

Retain subparagraphs below to eliminate air movement and light and sound leaks at edges of ceiling.

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 (400 mm) o.c. and not more than 3 inches (75 mm) from ends, leveling with ceiling suspension system to a tolerance of 1/8 inch in 12 feet (3.2 mm in 3.66 m). Miter corners accurately and connect securely.

Delete subparagraph below or qualify if exposed fasteners are allowed.

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

Delete paragraph below if no suspended tile.

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

Delete first paragraph and subparagraphs below if no directionally patterned tiles are specified.

F. Install acoustical tiles in coordination with suspension system and exposed moldings and trim. Place splines or suspension system flanges into kerfed edges so tile-to-tile joints are closed by double lap of material.

1. Fit adjoining tile to form flush, tight joints. Scribe and cut tile for accurate fit at borders and around penetrations through tile.

Delete below if no fire-resistance-rated assemblies.

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

If testing of installed fasteners is required, see Editing Instruction No. 4 in the Evaluations.

2.8 ADJUSTING AND CLEANING

A. Replace damaged and broken panels.

B. Clean exposed surfaces of acoustical tile ceilings, including trim and edge moldings.

C. Comply with manufacturer's written instructions for cleaning and touchup of minor finish damage.

D. Remove and replace tiles and other ceiling components that cannot be successfully cleaned and repaired to permanently eliminate evidence of damage.

2.9 ACOUSTICAL TILE CEILING SCHEDULE

A. Water-Felted, Mineral-Base Acoustical Tiles for Acoustical Tile Ceiling, Main Dining Area: Where this designation is indicated, provide acoustical tiles complying with the following:

1. Products: Available products include “ClimaPlus”, reveal edge, tegular, (5/8().

2. Classification: Tiles fitting ASTM E 1264 for Type III, Form 2.

3. Color: White.

4. Noise Reduction Coefficient: NRC 0.55-0.65; per ASTM C423.

5. Ceiling Attenuation Class: Not less than CAC 35-39; per ASTM C1414.

6. Edge Detail: Reveal edge, tegular.

7. Thickness: 5/8 inch.

8. Size: 24 by 24 inches.

9. Fire Resistance: Class A (UL); per ASTM E1264.

B. Water-Felted, Mineral-Base Acoustical Tiles for Acoustical Tile Ceiling, Food Serving line: Where this designation is indicated, provide acoustical tiles complying with the following:

1. Products: Available products include “ClimaPlus”, reveal edge, tegular, (1/2”)

2. Classification: Tiles fitting ASTM E 1264 for Type XX, Pattern G.

3. Color: White.

4. Ceiling Attenuation Class: Not less than CAC 45-49; per ASTM C1414.

5. Edge Detail: Reveal edge, tegular.

6. Thickness: 1/2 inch.

7. Size: 24 by 48 inches.

8. Fire Resistance: Class A (UL); per ASTM E1264.

C. Suspension System for Acoustical Tile Ceiling: Where this designation is indicated, provide acoustical tile ceiling suspension system complying with the following:

1. Products: Available products include Suprafine Fire Guard 9/16( exposed tee.

2. Direct-Hung, Double-Web Suspension System: Main and cross runners roll formed from and capped with cold-rolled steel sheet, prepainted, electrolytically zinc coated, or hot-dip galvanized according to ASTM A 653/A, G01 coating designation; other characteristics as follows:

a. Structural Classification: Intermediate-duty system.

b. Face Dimension: 9/16(.

c. Profile: Exposed tee.

d. Color: White, baked polyester paint.

END OF SECTION 09512

Acoustical Panels

09512-7