Short Form Specification
Section 09 51 00 - Acoustical Ceilings
Gyptone® Brand Designer Gypsum Ceiling Systems

This section specifies acoustical ceiling systems with Gyptone® Brand Designer Gypsum acoustical ceiling panels manufactured by CertainTeed. It is suggested that CertainTeed product literature, and the CISCA Ceiling Systems Handbook be available and referenced when editing this section.

Part 1 - General

1.1 Related Documents

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

1.2 Summary

1. This section includes the following:
   1. Gypsum based acoustical panels and ceiling systems.

1.3 References

1. ASTM C423: Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method.
2. ASTM C635: Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-in Panels.
3. ASTM C636: Practice for installation of Metal Ceiling Suspension Systems for Acoustical Tile and Lay-in Panels.
4. ASTM E84: Surface Burning Characteristics of Building Materials.
5. ASTM E413: Classification for Rating Sound Insulation.
6. ASTM E580: Practice for Application of Ceiling Suspension Systems for Acoustical Tile and Lay-in Panels in Areas Requiring Seismic Restraint.
7. ASTM E795: Practices for Mounting Test Specimens During Sound Absorption Tests.
8. ASTM E1264: Standard Classification for Acoustical Ceiling Products.
9. ASTM E1414: Test Method for Airborne Sound Attenuation Between Rooms Sharing a Common Ceiling Plenum.
10. ASTM E1477: Light Reflectance of Acoustical Materials by the Integrating Sphere Reflectometer.
11. AWCI: Association of the Wall and Ceiling Industries International.
12. CISCA: Ceilings and Interior Systems Construction Association.

1.4 Submittals:

Reflected ceiling plans are not included, as they are typically incorporated with the contract drawings. If they are required as a shop drawing submittal, then include here.

1. Ceiling panel physical samples not less than [6] [___] inches square.
2. Suspension system component samples [12] [___] inches long.
3. Product data for each type of ceiling product submitted.
4. Manufacturer’s certificate that products meet or exceed specified requirements.

1.5 Quality Assurance:

1. Installer Qualifications: An entity experienced in the installation of acoustical ceiling systems similar to requirements for this Project, and acceptable to, or licensed by, acoustical ceilings systems manufacturer.
2. Comply with the following standards:
   1. CISCA “Acoustical Ceilings: Use and Practice.”
   2. CISCA “Ceilings Systems Handbook.”

Delete the following if not required.

3. CISCA “Recommendations for Direct-Hung Acoustical Tile and Lay-In Panel Ceilings. Seismic Zones 0-2.”
4. CISCA “Guidelines for Seismic Restraint Direct Hung Suspended Ceiling Assemblies.” Seismic Zones 3 and 4.”

1.6 Delivery, Storage, and Handling:

1. Deliver acoustical ceiling system components in manufacturer’s original unopened packages or containers, with labels intact.
2. Store all components to provide suitable protection against deleterious effects from exposure to moisture, direct sunlight, or other causes.
3. Handle all components to preclude damage. Take special precaution to prevent damage to acoustical ceiling unit edges and corners.
4. Comply with manufacturer’s Material Safety Data Sheets (MSDS) for delivery, storage, and handling of components.

1.7 Project Conditions:

1. Environmental Conditions: Install acoustical ceiling systems only when temperature and humidity conditions closely approximate interior conditions to exist when building is occupied. However, as a minimum, maintain maximum 104 degrees F (40 C), and 90% relative humidity. No exceptions.
2. Prior to installation, the following conditions must exist:
   1. All windows and doors in place and roof watertight.
   2. Work of all wet trades completed and thoroughly dried to installation of any system components.
   3. Mechanical and Electrical trades shall have completed their work above ceiling line prior to acoustical ceiling systems installation. Coordinate with Mechanical and electrical trades prior to installation.

1.8 Extra Materials:

Select percentage of extra materials desired. A smaller percentage may be more suitable for large quantity projects.

1. Provide extra material in a quantity equal to [5] [___] percent of each system component installed, in manufacturer’s standard packaging with suitable protection for storage and identification labels intact.

Add special warranty provisions here, if required to address uncommon project requirements. Note: Ten (10) year product and fifteen (15) year system limited warranties are available on Gyptone and Celotex Brand products and systems.

Part 2 - Products

2.1 Materials, General:

1. Provide acoustical ceiling panels manufactured in accordance with ASTM E1264.

2.2 Acoustical Ceiling Units

1. Manufacturer: Provide products specified herein as manufactured by CertainTeed.
2. Basis-of-Design Product: Gyptone® Brand Gypsum Acoustical Ceiling Panels
1. Name: [Base 31™] [Line 4™] [Point 11™ ] [Quattro 20™]
2. Description: Gypsum board lay-in panel, smooth surface, [with] [without] perforations
3. Physical Characteristics:
   1. Type: XX (Gypsum base)
   2. Form: N/A
   3. Surface Pattern: [G (Base 31)] [A G (Line 4, Point 11, Quattro 20)]
   4. Size, Nominal: 24” X 24”
   5. Edge Detail: [Trim] [Narrow Reveal]
   6. Color: [White] [Field Painted To Match Architect’s Control Sample]
4. Performance Criteria:
   1. Noise Reduction Coefficient (NRC): [N/A (Base 31)] [0.60 (Point 11)] [0.65 (Line 4, Quattro 20)], pursuant to ASTM C423.
   2. Ceiling Attenuation Class (CAC): [17] [35 (Base 31)] [35 (Line 4, Point 11, Quattro 20 with fiberglass blanket overlay)], pursuant to ASTM E1414, and ASTM E413.
   3. Minimum Light Reflectance Coefficient (LR): [0.70 (Line 4)] [0.73 (Quattro 20)] [0.75 (Point 11)] [0.82 (Base 31)], pursuant to ASTM E1477.
   4. Surface Burning Characteristics: The following pursuant to ASTM E84:
      1. Flame Spread: 10
      2. Smoke Developed: 10

2.3 Exposed Suspension System

1. Manufacturer: Subject to compliance with requirements, provide product    specified herein as manufactured by CertainTeed.
2. Basis-of-Design Product:
   1. Name: Celotex® Brand [Classic Stab (White)] [Elite Narrow Stab (White)] [Protectone Classic Fire-Rated Stab (White and Colors)] [Protectone Elite Narrow Fire-Rated Stab (White and Colors)] [Protectone Fire-Rated Aluminum Capped (White and Colors)] 
   2. Grid Finish and Color
      1. [As selected by Architect from manufacturer’s available selections]
      2. [Match Architect’s control sample] [Color to match acoustical ceiling units.
3. Structural Classification [Intermediate] [Heavy] -Duty in accordance with ASTM C635.
4. Main runners, cross tees, and related grid components manufactured of cold rolled galvanized steel with [9/16”] [15/16”] face dimension.
5. Attachment Devices: Size anchors and intermediate support members for 5 times design load indicated in ASTM C635, Table I. Wire for hangers of size and type to suit intended application, complying with ASTM C641, Class1 zinc coating, not less than 12 gauge.
   1. Hanger Rods: Zinc-coated steel.
   2. Angle Hangers: ASTM A446 steel with G90 coating.
   3. Flat Hangers: Zinc-coated steel.
   4. Concrete Anchors: Corrosion-resistant design; tested pursuant to ASTM E488.
   5. Seismic Restraints: Pursuant to CISCA recommendations, ASTM E580 and local code requirements.
6. Moldings: Solid-rolled galvanized steel, painted finish; [angle] [stepped profile] [design as shown], suitable for suspension system and acoustical ceiling unit profile.

Part 3- Execution

3.1 Inspection:

1. Determine acceptability of substrates and conditions under which acoustical ceiling systems are to be installed. Do not proceed until unacceptable conditions have been corrected. Commencement of installation constitutes Installer’s acceptance of substrates and conditions.

3.2 Preparation:

1. Layout ceiling system in accordance with reflected ceiling plans and as acceptable to Architect.
2. Unless otherwise indicated, establish layout of acoustical ceiling units to balance border widths at opposite edges, with no units less than ½ width.

3.3 Coordination:

1. Coordinate layout and installation with other work supported by, or penetrating through ceiling, including, as applicable, light fixtures, HVAC equipment, fire suppression system components, and partition systems.

3.4 Installation, General:

1. Prior to installation of acoustical ceiling units, open packages and allow product to stabilize to current environment.
2. Install acoustical materials and suspension system in strict accordance with the manufacturer’s printed recommendations, ASTM C636, and CISCA recommendations.

3.5 Exposed Suspension System Installation:

1. Main runners directly suspended by minimum 12 gauge galvanized steel wire; hanger wire wrapped tightly a minimum of three full turns.

Select main runner spacing option.

1. Main Runner Spacing: [24] [48] inches on center
2. Main Runner Spacing: As indicated on Drawings.
3. Main Runner Spacing: [____________________]

Select hanger spacing option

1. Hanger Spacing: 48 inches on center
2. Hanger Spacing: As indicated on Drawings.
3. Hanger Spacing: [____________________]

2. Main runners interconnected by cross tees to form modules as shown on reflected ceiling plans. Suitable cross tee lengths adjacent to recessed light fixtures on each side not supported by a main runner.

Select cross tee spacing option.

1. Cross tee spacing: 24 inches on center
2. Cross tee spacing: As indicated on Drawings.
3. Cross tee spacing: [____________________]

3. Wall moldings installed wherever suspension components meet vertical surfaces. [Set into acoustical sealant bed] and firmly secure to substrates; [corners neatly mitered] [corner caps installed].
4. Level acoustical ceiling to 1/8” in 12’-0” with maximum deflection of 1/360 of the span length in inches.

3.6 Acoustical Ceiling Units:

1. Install acoustical ceiling units directionally as shown by reflected ceiling plans.
2. Install acoustical ceiling units in coordination with suspension system with edges supported on main runner and cross tee flanges. Support perimeter edges by wall moldings.

3.7 Adjustments:

1. Make adjustments in ceiling system as necessary to ensure compliance with this specification.
2. Remove and replace damaged or soiled acoustical ceiling units.

3.8 Cleaning:

1. Remove debris which may have been caused during installation of this work.

End of Section 09 51 00