36C26318B0038-A00004002.pdf

08-01-16

VA Project # 568-16-101 09 51 00 - 1

SECTION 09 51 00

ACOUSTICAL CEILINGS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Acoustical units.

2. Metal ceiling suspension system for acoustical ceil ings.

3. Adhesive application.

1.2 RELATED REQUIREMENTS

A. Color, pattern, and location of each type of acoust ical unit: Section

09 06 00, SCHEDULE FOR FINISHES.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. ASTM International (ASTM):

1. A641/A641M-09a(2014) - Zinc-coated (Galvanized) Car bon Steel Wire.

2. A653/A653M-15e1 - Steel Sheet, Zinc-Coated (Galvani zed) or Zinc-Iron

Alloy-coated (Galvannealed) by the Hot-Dip Process.

3. C423-09a - Sound Absorption and Sound Absorption Co efficients by the

Reverberation Room Method.

4. C635/C635M-13a - Manufacture, Performance, and Test ing of Metal

Suspension Systems for Acoustical Tile and Lay-in P anel Ceilings.

5. C636/C636M-13 - Installation of Metal Ceiling Suspe nsion Systems for

Acoustical Tile and Lay-in Panels.

6. E413-16 - Classification for Rating Sound Insulatio n.

7. E580/E580M-14 - Installation of Ceiling Suspension Systems for

Acoustical Tile and Lay-in Panels in Areas Subject to Earthquake

Ground Motions.

8. E1264-14 - Classification for Acoustical Ceiling Pr oducts.

1.4 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWIN GS, PRODUCT DATA, AND SAMPLES.

B. Submittal Drawings:

1. Show size, configuration, and fabrication and insta llation details.

C. Manufacturer's Literature and Data:

1. Description of each product.

2. Ceiling suspension system indicating manufacturer r ecommendation for each application.

VA Project # 568-16-101 09 51 00 - 2

3. Installation instructions.

4. Warranty.

D. Samples:

1. Acoustical units, 150 mm (6 inches) in size, each t ype, including units specified to match existing.

2. Suspension system, trim and molding, 300 mm (12 inc hes) long.

3. Colored markers for access service.

1.5 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warra nty of

Construction."

PART 2 - PRODUCTS

2.1 SYSTEM DESCRIPTION

A. Ceiling System: Acoustical ceilings units on expose d grid suspension systems.

2.2 ACOUSTICAL UNITS

A. General:

1. Ceiling Panel and Tile: ASTM E1264, bio-based conte nt according to

USDA Bio-Preferred Product requirements.

a. Mineral Fiber: 3.6 kg/sq. m (3/4 psf) weight, minim um.

2. Classification: Provide type and form as follows:

a. Type ACT 1 Units - Mineral base with water-based pa inted finish maximum 10 g/l VOC; Form 2 - Water felted, minimum 16 mm

(5/8 inch) thick.

b. NRC (Noise Reduction Coefficient): ASTM C423, minim um 0.55.

c. LR (Light Reflectance): Minimum 0.75 except as sche duled otherwise in Section 09 60 00, SCHEDULE FOR FINISHE S.

3. Lay-in panels: Sizes as indicated on Drawings, with square edges.

a. Sizes:

1) Edge and Joint Detail: Square edges and joints as r equired to suit suspension and access system.

B. SPECIAL FACED ACOUSTICAL TILE UNITS: Anti-microbial coated surfaces suitable for use in Class 5 Clean Rooms per ISO 146 44-1. Special faced acoustical tile units shall meet all general requir ements stated in this specification.

1. Type ACT 2 Units - Perforated Ceramic Units for Wet Service.

VA Project # 568-16-101 09 51 00 - 3

a. Mineral wool material, fired in kiln to produce a s table panel, totally unaffected by moisture when submerged in wa ter.

b. No damage when subjected to 10 cycles of steam at 1 35 degrees C

(275 degrees F) and cooling to 10 degrees C (50 deg rees F).

c. Minimum of 16 mm (5/8 inch) thick.

d. Not affected when immersed in five percent chlorine solution, except for paint finish.

2.3 METAL SUSPENSION SYSTEM

A. General: ASTM C635, intermediate-duty , except as o therwise specified.

1. Suspension System: Provide the following:

a. Galvanized cold-rolled steel, bonderized.

2. Main and Cross Runner: Use same construction Do not use lighter-duty sections for cross runners.

B. Exposed Grid Suspension System: Support of lay-in p anels.

1. Grid Width: 22 mm (7/8 inch) minimum with8 mm (5/16 inch) minimum panel bearing surface.

2. Molding: Fabricate from the same material with same exposed width and finish.

3. Finish: Baked-on enamel flat texture finish.

a. Color: To match adjacent acoustical units unless sp ecified otherwise in Section 09 06 00, SCHEDULE FOR FINISHE S.

C. Anchors and Inserts: Provide anchors or inserts to support twice the loads imposed by hangers.

1. Hanger Inserts: Steel, zinc-coated (galvanized afte r fabrication).

D. Wire: ASTM A641.

1. Size:

a. Wire Hangers: Minimum diameter 2.68 mm (0.1055 inch ).

b. Bracing Wires: Minimum diameter 3.43 mm (0.1350 inc h).

2.4 ACCESSORIES

A. Perimeter Seal: Vinyl, polyethylene or polyurethane open cell sponge material, density of 1.3 plus or minus 10 percent, compression set less than 10 percent with pressure sensitive adhesive co ating on one side.

1. Thickness: As required to fill voids between back o f wall molding and finish wall.

2. Size: Minimum 9 mm (3/8 inch) wide strip.

VA Project # 568-16-101 09 51 00 - 4

B. Access Identification Markers: Colored markers with pressure sensitive adhesive on one side, paper or plastic, 6 to 9 mm ( 1/4 to 3/8 inch) diameter.

1. Color Code: Provide the following color markers for service identification:

Color Service

Red Sprinkler System: Valves and Controls

Green Domestic Water: Valves and Controls

Yellow Chilled Water and Heating Water

Orange Ductwork: Fire Dampers

Blue Ductwork: Dampers and Controls

Black Gas: Laboratory, Medical, Air and Vacuum

PART 3 - EXECUTION

3.1 ACOUSTICAL UNIT INSTALLATION

A. Layout acoustical unit symmetrically, with minimum number of joints.

B. Installation:

1. Install acoustic tiles after wet finishes have been installed and solvents have cured.

2. Install lay-in acoustic panels in exposed grid with minimum 6 mm

(1/4 inch) bearing at edges on supports.

a. Install tile to lay level and in full contact with exposed grid.

b. Replace cracked, broken, stained, dirty, or tile.

3. Markers:

a. Install color coded markers to identify the various concealed piping, mechanical, and plumbing systems.

b. Attach colored markers to exposed grid on opposite sides of the units providing access.

c. Attach marker on exposed ceiling surface of upward access acoustical unit.

C. Touch up damaged factory finishes.

1. Repair painted surfaces with touch up primer.

3.2 CEILING SUSPENSION SYSTEM INSTALLATION

A. General: Install according to ASTM C636.

1. Use direct or indirect hung suspension system or co mbination of both.

VA Project # 568-16-101 09 51 00 - 5

2. Support a maximum area of 1.48 sq. m (16 sq. ft.) o f ceiling per hanger.

3. Prevent deflection in excess of 1/360 of span of cr oss runner and main runner.

4. Provide additional hangers located at each corner o f support components.

B. Direct Hung Suspension System: ASTM C635.

1. Support main runners by hanger wires attached direc tly to the structure overhead.

2. Maximum spacing of hangers, 1200 mm (4 feet) on cen ters unless interference occurs by mechanical systems. Use indi rect hung suspension system where not possible to maintain ha nger spacing.

C. Anchorage to Structure:

1. Steel:

a. Install carrying channels for attachment of hanger wires.

1) Size and space carrying channels to support load wi thin performance limit.

2) Attach hangers to steel carrying channels, spaced f our feet on center, unless area supported or deflection exce eds the amount specified.

b. Attach carrying channels to the bottom flange of st eel beams spaced not 1200 mm (4 feet) on center before firepr oofing is installed. Weld or use steel clips for beam attachm ent.

c. Attach hangers to bottom chord of bar joists or to carrying channels installed between the bar joists when hang er spacing prevents anchorage to joist. Rest carrying channels on top of the bottom chord of the bar joists, and securely wi re tie or clip to joist.

3.3 CEILING TREATMENT

A. Moldings:

1. Install metal wall molding at perimeter of room, co lumn, or edge at vertical surfaces.

2. Install special shaped molding at changes in ceilin g heights and at other breaks in ceiling construction to support aco ustical units and to conceal their edges.

B. Perimeter Seal:

1. Install perimeter seal between vertical leg of wall molding and finish wall, partition, and other vertical surfaces .

VA Project # 568-16-101 09 51 00 - 6

2. Install perimeter seal to finish flush with exposed faces of horizontal legs of wall molding.

3.4 CLEANING

A. Remove excess adhesive before adhesive sets.

B. Clean exposed surfaces. Remove contaminants and sta ins.

- - - E N D - - -