SECTION 09511

SUSPENDED ACOUSTICAL CEILINGS

PART 1 GENERAL

SECTION INCLUDES

Suspended metal grid ceiling system and perimeter trim.

Acoustical [tile.] [panels.] [metal pans.]

[Non-fire rated] [Fire rated] assembly.

[Supplementary acoustical insulation over system units.]

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [______-____________]: Placement of special anchors or inserts for suspension system.

RELATED SECTIONS

Section 07213 - Batt and Blanket Insulation.

Section 08305 - Access Doors: Access panels.

Section [______-____________]: [Acoustical] partition system.

Section 13025 - Integrated Ceilings.

Section 15325 - Sprinkler Systems: Sprinkler heads in ceiling system.

Section 15936 - Air Outlets and Inlets: Air diffusion devices in ceiling system.

Section 16510 - Interior Luminaires:	Light fixtures in ceiling system.

Section 16721 - Fire Alarm and Smoke Detection Systems: Fire alarm components in ceiling system.

Section 16770 - Public Address and System.

REFERENCES

ASTM C635 - Metal Suspension Systems for Acoustical Tile and Lay-in Panel Ceilings.

ASTM C636 - Installation of Metal Ceiling Suspension Systems for Acoustical Tile and Lay-in Panels.

ASTM C665 - Mineral Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing.

ASTM E580 - Practice for Application of Ceiling Suspension Systems for Acoustical Tile and Lay-in Panels in Areas Requiring Seismic Restraint.

ASTM E1264 - Classification of Acoustical Ceiling Products.

Ceilings and Interior Systems Contractors Association (CISCA) - Acoustical Ceilings: Use and Practice.

UL - Fire Resistance Directory and Building Material Directory.

SYSTEM DESCRIPTION

Installed System: Conform to UL Design # [____] for [ceiling and floor] [ceiling and roof] [________] assembly.

Suspension system to rigidly secure acoustical ceiling system including integral mechanical and electrical components with maximum deflection of [1/360] [____].

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Shop Drawings: Indicate grid layout and related dimensioning, junctions with other work or ceiling finishes, interrelation of mechanical and electrical items related to system and [________].

Product Data: Provide data on metal grid system components, acoustical units and [________].

Samples:	Submit [two] [____] samples [full size] [[____x____] inch ([____x____] mm) in size] illustrating material and finish of acoustical units.

Samples:	Submit [two] [____] samples each, [____] inches ([____] mm) long, of suspension system [main runner,] [cross runner,] [edge trim,] and [________].

Manufacturer's Installation Instructions: Indicate special procedures, perimeter conditions requiring special attention, and [________].

QUALIFICATIONS

Grid Manufacturer: Company specializing in manufacturing the Products specified in this section with minimum [three] [_______] years [documented] experience.

Acoustical Unit Manufacturer: Company specializing in manufacturing the Products specified in this section with minimum [three] [_______] years [documented] experience.

REGULATORY REQUIREMENTS

Conform to [applicable] [___________] code for [fire rated assembly] [and] [combustibility requirements for materials].

ENVIRONMENTAL REQUIREMENTS

Maintain uniform temperature of minimum [60] [____] degrees F ([16] [____] degrees C), and maximum humidity of [40] [____] percent prior to, during, and after acoustical unit installation.

SEQUENCING

Sequence work under the provisions of Section [01010.] [________.]

Sequence work to ensure acoustical ceilings are not installed until building is enclosed, sufficient heat is provided, dust generating activities have terminated, and overhead work is completed, tested, and approved.

Install acoustical units after interior wet work is dry.

EXTRA MATERIALS

Furnish under provisions of Section [01700.] [________.]

Provide [____] sq ft ([____] sq m) of extra [tile] [panels] [metal pans] to Owner.

****** [OR] ******

Provide [____] percent of total acoustical unit area of extra [tile] [panels] [metal pans] to Owner.

PART 2 PRODUCTS

MANUFACTURERS - SUSPENSION SYSTEM

[__________________________________] Product [_________].

[__________________________________] Product [_________].

[__________________________________] Product [_________].

Substitutions: Under provisions of Section [01600.] [________.]

SUSPENSION SYSTEM MATERIALS

Non-fire Rated Grid:	[ASTM C635, [light] [intermediate] [heavy] duty]; [exposed T] [exposed T/one direction] [concealed T and G] [concealed H and T] [paired access T] [downward access removable T] [concealed Z] [concealed T] [metal pan T] [________]; components die cut and interlocking.

****** [OR] ******

Fire Rated Grid:	[ASTM C635, [light] [intermediate] [heavy] duty], listed by UL for use in a [____] hour assembly, [two directional concealed] [exposed T] [exposed T/one direction] [________]; components die cut and interlocking.

Grid Materials: [Commercial quality cold rolled steel with galvanized coating.] [Cold rolled aluminum.] [Extruded aluminum.] [________].

Exposed Grid Surface Width: [15/16] [9/16] [____] inch ([24] [14] [____] mm) [with reveal].

Grid Finish:	[White] [Anodized [________].] [[________] color [as selected].]

Accessories:	[Stabilizer bars] [clips] [splices] [edge moldings] [hold down clips] [and] [________] required for suspended grid system.

Support Channels and Hangers: [Galvanized] [Primed] steel; size and type to suit application [, seismic requirements,] and ceiling system flatness requirment specified.

MANUFACTURERS - ACOUSTICAL UNITS

[__________________________________] Product [_________].

[__________________________________] Product [_________].

[__________________________________] Product [_________].

Substitutions: Under provisions of Section [01600.] [________.]

ACOUSTICAL UNIT MATERIALS

Acoustical Tile: [ASTM E1264,] conforming to the following:

Size: 12 x 12 inches (300 x 300 mm).

Thickness:	[5/8] [____] inches ([15] [____] mm).

Composition: [Mineral] [________].

Density: [____] lb/cu ft ([____] kg/cu cm).

Light Reflectance:	[____] percent.

NRC Range:	[____] to [____].

STC Range:	[____] to [____].

Fire Hazard Classification: [____/____].

Joint:	[Kerfed] [Rabbetted] [________].

Edge: [Square] [Beveled].

Surface Color:	[White] [________].

Surface Finish:	[Perforated] [Non-directional fissured] [Directional fissured] [__________], [plastic wrapped].

****** [OR] ******

Acoustical Panels: [ASTM E1264,] conforming to the following:

Size: [12 x 24] [24 x 48] [24 x 24] [____x____] inches ([300 x 600] [600 x 1200] [600 x 600] [____x____] mm).

Thickness: [3/4] [5/8] [____] inches ([19] [15] [____] mm).

Composition: [Mineral.] [________.]

Density: [____] lb/cu ft ([____] kg/cu cm).

Light Reflectance:	[____] percent.

NRC Range:	[____] to [____].

STC Range:	[____] to [____].

Fire Hazard Classification: [____/____].

Edge: [Square.] [Rabbetted.] [________.]

Surface Color:	[White.] [________.]

Surface Finish:	[Perforated] [Non-directional fissured] [Directional fissured], [[plastic] [________] wrapped] [________].

****** [OR] ******

Metal Pans: [Galvanized steel] [Aluminum] flat formed sheet, with [glass fiber] [mineral fiber] [________] acoustical media backing; conforming to the following:

Size: [12 x 12] [12 x 24] [____x____] inches ([300 x 300] [300 x 600] [____x____] mm).

Thickness of Metal: [____] inch ([____] mm).

Thickness of Acoustical Media: [____] inch ([____] mm).

Light Reflectance:	[____] percent.

NRC Range:	[____] to [____].

STC Range:	[____] to [____].

Panel Edge: [Bevelled.] [________.]

Surface Pattern: [________].

Surface Color:	[White] [________] color [as selected].

ACCESSORIES

Acoustical Batt Insulation: Specified in Section [07213] [________], unfaced; [2] [____] inch ([50] [____] mm) thick.

****** [OR] ******

Acoustical Batt Insulation: ASTM C665, friction fit type, unfaced; [2] [____] inch ([50] [____] mm) thick, size cut to fit acoustical system.

Gypsum Board: UL fire rated type; [5/8] [____] inch ([15] [____] mm) thick, ends and edges square, paper faced.

Touch-up Paint: Type and color to match acoustical and grid units.

PART 3 EXECUTION

EXAMINATION

Verify site conditions under provisions of Section

[01039.] [________.]

Verify that layout of hangers will not interfere with other work.

INSTALLATION - LAY-IN GRID SUSPENSION SYSTEM

Install suspension system in accordance with [ASTM C636] [manufacturer's instructions] and as supplemented in this section.

[Install system in accordance with ASTM E580.]

Install fire rated system in accordance with [UL Design No. [____].] [[________] requirements.]

Install system capable of supporting imposed loads to a deflection of [1/360] [1/240] [________] maximum.

Lay out system to a balanced grid design with edge units no less than 50 percent of acoustical unit size.

****** [OR] ******

Locate system on room axis according to reflected plan.

Install after major above ceiling work is complete. Coordinate the location of hangers with other work.

Supply hangers or inserts for installation to Section [________] with instructions for their correct placement.

[Provide hanger clips during steel deck erection. Provide additional hangers and inserts as required.]

Hang suspension system independent of walls, columns, ducts, pipes and conduit. Where carrying members are spliced, avoid visible displacement of face plane of adjacent members.

Where ducts or other equipment prevent the regular spacing of hangers, reinforce the nearest affected hangers [and related carrying channels] to span the extra distance.

Do not support components on main runners or cross runners if weight causes total dead load to exceed deflection capability. [Support fixture loads by supplementary hangers located within [6] [____] inches ([150] [____] mm) of each corner; or support components independently.]

Do not eccentrically load system, or produce rotation of runners.

Install edge molding at intersection of ceiling and vertical surfaces, using longest practical lengths. Miter corners. Provide edge moldings at junctions with other interruptions.

Form expansion joints [as detailed] [________]. Form to accommodate plus or minus [1] [____] inch ([25] [____] mm) movement. Maintain visual closure.

Install light fixture boxes constructed of gypsum board above light fixtures in accordance with UL assembly requirements.

****** [OR] ******

INSTALLATION - CONCEALED GRID SUSPENSION SYSTEM

Install suspension system in accordance with [ASTM C636] [manufacturer's instructions] and as supplemented in this section.

[Install system in accordance with ASTM E580.]

Install system capable of supporting imposed loads to a deflection of [1/360] [1/240] [________] maximum.

Lay out system to a balanced grid design with edge units no less than 50 percent of acoustical unit size.

****** [OR] ******

Locate system on room axis according to reflected plan.

Install after major above ceiling work is complete. Coordinate the location of hangers with other work.

Supply hangers or inserts for installation to Section [________] with instructions for their correct placement.

[Provide hanger clips during steel deck erection. Provide additional hangers and inserts as required.]

Hang suspension system independent of walls, columns, ducts, pipes and conduit. Where carrying members are spliced, avoid visible displacement of face plane of adjacent members.

Where ducts or other equipment prevent the regular spacing of hangers, reinforce the nearest affected hangers [and related carrying channels] to span the extra distance.

Do not support components on main runners or cross runners if weight causes total dead load to exceed deflection capability. Support fixture loads by supplementary hangers located within [6] [____] inches ([150] [____] mm) of each corner; or support components independently.

Do not eccentrically load system, or produce rotation of runners.

Install [concealed] edge molding at intersection of ceiling and vertical surfaces, using longest practical lengths. Miter corners. Provide [concealed] edge moldings at junctions with other interruptions.

Form expansion joints [as detailed] [________]. Form to accommodate plus or minus [1] [____] inch ([25] [____] mm) movement. Maintain visual closure.

INSTALLATION - ACOUSTICAL UNITS

Install acoustical units in accordance with manufacturer's instructions.

Fit acoustical units in place, free from damaged edges or other defects detrimental to appearance and function.

Lay directional patterned units [one way with pattern parallel to [longest] [shortest] room axis] [in basket weave pattern]. Fit border trim neatly against abutting surfaces.

Install units after above ceiling work is complete.

Install acoustical units level, in uniform plane, and free from twist, warp and dents.

Cut [tile] [panels] to fit irregular grid and perimeter edge trim. [Field rabbett [tile] [panel] edge.] [Double cut and field paint exposed edges of tegular units.]

[Where [bullnose concrete block corners] [round obstructions] occur, provide preformed closers to match edge molding.]

Lay acoustical insulation for a distance of [48] [____] inches ([1 200] [____] mm) either side of acoustical partitions [as indicated].

Install hold-down clips to retain panels tight to grid system [within [20] [____] ft ([6] [____] m) of an exterior door] [________].

ERECTION TOLERANCES

Maximum Variation from Flat and Level Surface: [1/8] [____] inch in 10 feet ([3] [____] mm in 3 m).

Maximum Variation from Plumb of Grid Members Caused by Eccentric Loads: [2] [____] degrees.

SCHEDULE

Kitchen Areas: 12 x 12 inch metal pan acoustical units, plastic faced, interlocking suspension grid, insulation batts placed over units.

Dining Areas: 24 x 48 inch square edge mineral acoustical units, interlocking exposed T suspension grid.

END OF SECTION