Final 09 51 00 Acoustical Ceilings.pdf

OFFUTT AIR FORCE BASE

(092036) 09 51 00-1 (Repair AHU O-Club, B462)

2010 by FEI

SECTION 09 51 00

ACOUSTICAL CEILINGS

PART 1 - GENERAL

1.1 SCOPE

A. Work under this Section consists of furnishing all labor, materials and equipment necessary for and incidental to the complete and proper furnishing and installation of all acoustical ceilings and suspension systems therefore and related work as shown on the drawings or specified herein, and in accordance with all applicable requirements of the Contract Documents. Work within this section shall be completely coordinated with work of all other trades.

B. Extent of each type of acoustical ceiling is shown or scheduled on drawings.

C. The types of acoustic ceilings specified herein include only exposed grid lay - in ceilings.

D. The material and installation shall conform to the applicable local building code requirements, and all authorities having jurisdiction.

E. Notwithstanding reference to any manufactured or produced item or material in this specification that contains asbestos, materials or items that contain asbestos are not acceptable. In the event that any of the materials or items specified herein contains asbestos, the Architect shall be promptly notified in writing and the Architect will select a suitable substitute material or item which shall be furnished at no additional cost to the Owner.

1.2 RELATED WORK

A. Mechanical work is found elsewhere in Division 23.

1.3 QUALITY ASSURANCE

A. Installer: Firm with not less than three years of successful experience in installation of acoustical ceilings similar to requirements for this project and which is acceptable to manufacturer of acoustical units, as shown by current written statement from manufacturer.

B. Provide acoustical materials which have been tested, rated and labeled by UL for a maximum of 25 for flame spread; 50 for fuel contributed, and 50 for smoke developed as listed in Underwriters

Laboratories Building Materials Directory of latest edition.

1.4 CODES, SPECIFICATIONS AND STANDARDS

A. Publications listed below form a part of this specification to extent referenced. Publications are referenced in the text by basic designation only. Any material or operation specified by reference to the published specifications of a manufacturer or other referenced specification or standard shall comply with the requirements of the latest edition. In case of a conflict between a referenced specification or standard and these project specifications the more stringent requirement shall govern.

B. Comply with the applicable provisions of the following codes, specifications and standards to the extent indicated by reference thereto.

(092036) 09 51 00-2 (Repair AHU O-Club, B462)

1. American Society of Testing and Materials - ASTM A 641 "Standard Specification for Zinc-

Coated (Galvanized) Carbon Steel Wire".

2. American Society of Testing and Materials - ASTM C 635 "Standard Specification for the

Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and

Lay-in Panel Ceilings".

3. American Society of Testing and Materials - ASTM C 636 "Standard Practice for Installation of

Metal Ceiling Suspension Systems for Acoustical Tile and Lay-In Panels".

4. American Society of Testing and Materials - ASTM E 1264 "Standard Classification for

Acoustical Ceiling Products".

1.5 SUBMITTALS

A. Product Data: Manufacturer's product specifications and installation instructions for each acoustical ceiling material required, and for each suspension system, including certified laboratory test reports and other data as required to show compliance with these specifications. Include manufacturer's recommendations for cleaning and refinishing acoustical units, including precautions against materials and methods which may be detrimental to finishes and acoustical performances.

1.6 SAMPLES

A. Set of 12 inch square samples for each acoustical unit required, showing full range of exposed color and texture to be expected in completed work.

B. Set of 12 inch long samples of each exposed runner and molding.

1.7 JOB CONDITIONS

A. Space Enclosure: Do not install interior acoustical ceilings until space enclosed and weatherproof, and until wet - work in space completed and nominally dry, and until work above ceilings completed, and until ambient conditions of temperature and humidity will be continuously maintained at values near those indicated for final occupancy.

1.8 DELIVERY AND STORAGE

A. Schedule deliveries to avoid delays in the work.

B. Deliver and store materials in their original, unopened containers bearing the manufacturer's label.

C. Store materials off the floor to assure proper protection from water and cover if necessary.

PART 2 - PRODUCTS

2.1 ACOUSTICAL TILE 1: "ATC - 1"

A. Shown on the drawings as “ATC - 1" Lay - in, type 24 inch x 24 inch x 3/4 inch thick with angled or square tegular edges. Panels shall be non - combustible, made of wet - formed mineral fiber (non -asbestos) material and shall have a fissured face design. NRC range 0.60 - 0.70, CAC range 35 - 40, light reflectance over 70 percent per ASTM E 1264, color shall be white.

B. Provide one of the following subjects to compliance with the specification:

(092036) 09 51 00-3 (Repair AHU O-Club, B462)

1. Armstrong - Sanserra - #573

2. USG - Glacier - #707.

3. Or Approved Equal.

2.2 ACOUSTICAL TILE 2: "ATC - 2"

A. Shown on the drawings as “ATC - 2": Lay - in, type 24 inch x 48 inch x 5/8 inch, specifically recommended by manufacturer for high - humidity applications, square edge. NRC range 0.50 to 0.60, CAC 38, Light reflectance over 80 percent per ASTM E1264, density not less than 15 pounds per cubic foot, color shall be white.

B. Provide one of the following subjects to compliance with the specifications:

1. Armstrong - Ceramaguard Fine Fissured #608

2. USG Interiors, Inc. - Rock Face Clima Plus #56380

2.3 ACOUSTICAL TILE 3: "ATC - 3"

A. Shown on the drawings as “ATC - 3" Lay - in, type 24 inch x 24 inch x 3/4 inch thick with angled or square tegular edges. Panels shall be non - combustible, made of wet - formed mineral fiber (non -asbestos) material and shall have a fissured face design. NRC range 0.60 - 0.70, CAC range 35 - 40, light reflectance over 70 percent per ASTM E 1264, color shall be white.

B. Provide one of the following subjects to compliance with the specification:

1. Armstrong - Sanserra - #573

2. USG - Glacier - #707.

2.4 CEILING SUSPENSION MATERIALS

A. General: Comply with ASTM C 635, as applicable to type of suspension system required for type of ceiling units indicated. Coordinate with other work supported by or penetrating through ceilings, including light fixtures and HVAC equipment. Structural Class: Heavy - duty system.

B. Attachment Devices: Size for 5 times design load indicated in ASTM C 635, Table 1, Direct Hung.

C. Type of System: Either direct - hung or indirect - hung suspension system, at Contractor's option.

D. System Manufacturer: Subject to compliance with specification, provide one of the following exposed tee system for “ATC - 1":

1. 15/16 - inch wide “Prelude” – Armstrong.

2. 15/16 - inch wide “DX/DXL 26" – USG.

3. Or Approved Equal

(092036) 09 51 00-4 (Repair AHU O-Club, B462)

E. System Manufacturer: Subject to compliance with specification, provide one of the following exposed tee systems for “ATC - 2 ":

1. 15/16 inch wide “AL Prelude Plus XL” – Armstrong.

2. 15/16 inch wide “830 Aluminum” - Chicago Metallic.

3. 15/16 inch wide “ZXLA” - USG Interiors, Inc.

4. Or Approved Equal.

F. System Manufacturer: Subject to compliance with specification, provide one of the following exposed tee systems for “ATC - 3 ":

1. Reuse Existing Grid and Wall Angle.

G. High Humidity Finishes: Where suspension system supports ceilings indicated as “ATC - 2" or as

"High Humidity" area of project, comply with ASTM C 635 requirements for "Severe Environment

Performance": for "High Humidity Test".

H. Hanger Wires: Galvanized carbon steel, ASTM A 641, soft temper, pre - stretched, yield - stress load of at least 3 times design load, but not less than 12 gauge (0.106 inch). Provide soft stainless steel wire hangers for use in wet areas where “ATC - 2" is specified.

I. Carrying Channels: 1-1/2 inch steel channels, hot - rolled or cold - rolled.

J. Main and Cross Runners: Double web steel, electro - galvanized, with smooth, matte (low gloss) white finish on all exposed surfaces. Provide main runners having abutting sections which join with splices, interlocking ends, tab locks, pin locks or other suitable connection. Provide cross runners which match and interlock with main runners.

K. Wall Trim Angle: Hemmed edge matte (low gloss) white. Use at all edges and penetrations of ceiling.

L. Provide complete exposed series system as required. Provide with pre - manufactured inside and outside corners.

2.5 ACOUSTICAL SEALANT

A. Heavy - bodied, asbestos - free, non - shrinking, non - drying, non - sag mastic compound intended for interior sealing of concealed construction joints.

PART 3 - EXECUTION

3.1 INSPECTION

A. Installer must examine conditions under which acoustical ceiling work is to be performed and must notify Contractor in writing of unsatisfactory conditions. Do not proceed with work until unsatisfactory conditions have been corrected in manner acceptable to Installer.

(092036) 09 51 00-5 (Repair AHU O-Club, B462)

3.2 PREPARATION

A. Provide all hangers and inserts necessary to support acoustical ceilings, and rough suspension systems. Provide in time to avoid delay in progress of work. Locate and align hangers and inserts correctly. Coordinate location and alignment with work of other trades.

B. Comply with reflected ceiling plans. Measure each ceiling area and establish layout of acoustical units to balance border widths at opposite edges of each ceiling. Avoid use of less - than - half width units at borders wherever possible.

3.3 INSTALLATION OF SUSPENSION SYSTEM

A. Install in accordance with manufacturer's instructions and ASTM C 636 with hangers supported only from building structural members. Locate hangers near each end and spaced 4 feet 0 inches along each carrying channel or direct - hung runner, unless otherwise indicated, leveling to tolerance of 1/8 inch in 12 feet 0 inches.

B. Secure wire hangers by looping and wire - tying, either directly to structures or to inserts, eye - screws, or other devices which are secure and appropriate for substrate, and which will not deteriorate or fail with age or elevated temperatures.

C. Provide rough suspension system and trapezing where necessary to support acoustical ceilings beneath pipes, ducts, equipment, etc. Do not suspend any part of rough suspension system or acoustical ceilings from pipes, ducts, conduit, equipment, etc. Provide structural members sized as required to span ducts, etc. Locate hangers to avoid contact with insulation covering ducts and pipes.

Splay hangers only where obstructions or other conditions preclude plumb, vertical installation. Offset horizontal forces of splayed hangers by counters playing, bracing or other approved methods.

D. Space hangers to prevent loads from items in or on ceiling from causing eccentric deflection and rotation exceeding specified limits. Provide additional hangers to support lighting fixtures. Space hangers to fall not more than 6 inches from ends, and 4 feet on center between ends, of main runners.

Support main runners directly from hangers. Do not bear on walls or partitions. Space main runners to support ceiling units and other work resting in or on ceiling. Join abutting sections of main runners with splices, interlocking ends, tab locks, pin locks or other suitable connections to provide alignment as follows:

1. Vertical and horizontal distance between exposed surfaces not more than 0.02 inches

2. Angular displacement of longitudinal axis not visually apparent.

E. Tightly secure supporting members to hangers to prevent vertical displacement and rotation of main runners. Level after installation to a tolerance not more than 1/360 of span with hangers taut, to prevent subsequent downward movement under ceiling loads. Do not bend or kink hangers to level.

F. Support cross runners by either main runners or by cross runners classified as main runners. Interlock ends with supporting members to form 90 degree angles between intersecting runners with a spacing tolerance not more than 1/32 inches between runners, non - cumulative beyond 12 feet.

G. Install edge moldings where ceilings meet walls, partitions or other vertical elements and at locations where necessary to conceal edges of acoustical units.

1. Sealant Bed: Apply continuous ribbon of acoustical sealant, concealed on back of vertical leg before installing moldings.

(092036) 09 51 00-6 (Repair AHU O-Club, B462)

2. Screw - attach moldings to substrate by fastening through holes drilled in web at intervals not over 16 inches on center and not more than 3 inches from ends, leveling with ceiling suspension system to tolerance of c inch in 12 feet 0 inches. Miter corners accurately and connect securely and install pre - manufactured inside and outside corner pieces. Support runners and border units on moldings.

H. Leave suspension system ready to accept installation of acoustic materials.

I. Cleaning. Clean soiled or discolored surfaces following installation.

3.4 INSTALLATION OF ACOUSTIC PANELS

A. Install into suspension system in accordance with manufacturer's instructions.

B. Perform field cutting as required to fit materials to grid. Make all cuts square and true. Trim rabbeted edge tile to form a finished rabbeted edge comparable to the factory edge. Paint trimmed edge to match color of tile.

3.5 CLEANING

A. Perform cleaning and replacement of defective units in time to avoid delay in progress of work and before final acceptance of work.

B. Carefully clean all soiled surfaces. Remove and replace all irregular, discolored, defective or damaged components at no additional expense to the Owner.

3.6 ADDITIONAL MATERIAL

C. At time of completing installation, deliver stock of maintenance material to Owner. Provide full size units matching units installed, packaged with protective covering for storage, and identified with appropriate labels.

1. Provide amount equal to 2.0 percent of acoustical units but not less than one full carton of each type of tile installed.

END OF SECTION