\* \* \* \* \* \* \* \*

READ AND **REMOVE THIS PAGE** BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

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[DIVISION 9: FINISHES]{.underline}

SECTION 09512 ‑ ACOUSTICAL TILE CEILING

USE: Furnishing and installing 12 x 12 inch acoustical tiles
adhesive‑applied to a gypsum board ceiling.

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[\_\_\_\_\_\] provide for information
to be inserted, as appropriate, to individual projects.

B. **TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES,** the
specifier must edit (delete, substitute or add to the text). The
remaining paragraphs must be renumbered.

C. DELETE FOR FINAL COPY: Notes to the Specifier, located between lines
of asterisks; all \[brackets\], [underlining]{.underline}, **boldface**,
and *italics*, within the paragraphs; and this page. (Open Reveal Codes
\[alt F3\] to do this accurately.)

D. [To Edit "(Footer B)":]{.underline} (Corel 8). **ENTIRE FOOTER SHOULD
BE BOLDED.** Click in the footer and delete the "Project Name (ftr B)"
text and replace it with the **Name of the Project (upper and lower
case)**. Replace date with current MM/YY (WITHOUT BRACKETS).

E. The Guide Specifications are intended to be continuously reviewed and
revised. User's technical comments are appreciated. Also, other related
or similar specification that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, ST
110, or call (303) 987-6868.

**DRAWING DATA REQUIRED:**

**REQUIRED SPEC MODIFICATIONS:**

[GENERAL NOTES]{.underline}

A. Whenever entire articles, paragraphs, or subparagraphs are not
applicable, the articles, paragraphs, or subparagraphs should be
deleted; when necessary, reletter or renumber articles, paragraphs, or
subparagraphs.

B. THIS GUIDE IS NOT INTENDED AS A SUBSTITUTE FOR READING THE ENTIRE
SECTION.

[TECHNICAL NOTES]{.underline}

A. 1.1B: Select or add applicable specification sections. Do not list
specification sections from Division 9.

B. 1.2: Select or add applicable references.

C. 1.3A: Select applicable phrase.

D. 1.3B: Insert number of copies of the manufacturer\'s descriptive data
required. Normally 2 copies are required. Distribution after review is
normally 1 copy to the COR, and 1 copy to the Contractor.

E. 1.3C: Insert number of samples required. Normally 2 samples are
required. Distribution after review is normally 1 sample to the COR, and
1 sample to the Contractor. Samples are normally 12 x 12 inch.

F. 2.1A1: Select applicable light reflectance requirement.

G. 2.1A4: Complete and select fire rating desired.

H. 4.1 and 4.2: When a \"lump sum\" Contract is used, delete the title
PART 4: MEASUREMENT AND PAYMENT, and both articles from this
specification section. Measurement and payment will be addressed in Part
4 of Section 01010.

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes: 12/01

Metric:

Technical Update: 08/92

SECTION 09512

ACOUSTICAL TILE CEILING

[PART 1: GENERAL]{.underline}

1.1 SUMMARY:

A. Section Includes: Furnishing and installing acoustical ceiling tiles.

1.2 REFERENCES:

A. American Society for Testing and Materials:

ASTM C 423 REV A-90 Test Method for Sound Absorption and Sound
Absorption Coefficients by the Reverberation Room Method

ASTM C 635‑91 Manufacture, Performance, and Testing of Metal Suspension
Systems for Acoustical Tile and Lay‑In Panel Ceilings

ASTM E 84 REV A-91 Test Method for Surface Burning Characteristics of
Building Materials

B. International Conference of Building Officials (ICBO):

UBC ‑ 1991 Uniform Building Code

1.3 SUBMITTALS:

A. General: Submittals shall be according to \[Section 01009 - General
Information and Requirements.\] \[and\] \[Section 01300 - Submittals.\]
\[and\] \[Section 01365 - Certificates of Conformance.\]

B. Manufacturer\'s Literature: Submit \[[ ]{.underline}\] copies of
manufacturer\'s descriptive data for acoustical tile to be used on this
project.

C. Samples: Submit \[[ ]{.underline}\] samples of acoustical tile to be
used on this project. Samples shall be of the actual material \[[
]{.underline}\] x \[[ ]{.underline}\] in size.

1.4 QUALITY ASSURANCE:

A. Failure Criteria: Not limited to the following:

1\. Tile coming loose from substrate.

2\. Discoloration of tile through normal usage.

1.5 DELIVERY, STORAGE, AND HANDLING:

A. Storage: Store tiles in areas having temperature and humidity
conditions which shall be prevalent in the areas to receive panels.
Temperatures shall be between 60 to 80 degree F with relative humidity
no greater than 70% in an enclosed building.

1.6 SEQUENCING AND SCHEDULING:

A. Conditions: Plastering, concrete, terrazzo, or any other wet work
shall be complete and dry prior to installation of acoustical tiles.

B. Requirements: Windows and doors shall be in place. The heating,
ventilating and air‑conditioning systems shall be installed and operable
where necessary to maintain proper temperatures before, during and after
installation of the acoustical materials.

1.7 MAINTENANCE:

A. Extra Materials: Upon completion of the work, deliver additional
tiles, 5% of total area installed, to the Government for use in repairs
and maintenance. The additional materials shall be from same lot as
material installed and properly marked in the original packaging.

[PART 2: PRODUCTS]{.underline}

2.1 MATERIALS:

A. Acoustical Tiles: Noncombustible fissured fire‑rated mineral
fiberboard in the form of square tiles measuring nominally 12 x 12
inches, thickness 5/8 inch, beveled edged.

1\. ab Light Reflectance: A washable matte white finish with light
reflectance:

\[LR‑1 (over 75%)\]

\[LR‑2 (70‑74%)\]

\[LR‑3 (65‑69%)\]

2\. Noise Reduction Coefficient (NRC): Range of (0.55‑0.65) according to
ASTM C 423.

3\. Sound Transmissions Class (STC): Range shall be 35‑39.

4\. Fire‑Rated Installation: Conform to Underwriters\' Laboratories,
Inc., Building Materials List Time‑Design‑Rated Assembly \[[
]{.underline}\] to provide \[1\], \[2\], \[3\] hour fire‑rated
protection. Panels shall have Class 25 flame‑spread rating according to
ASTM E 84.

B. Adhesive: Suitable for the purpose, delivered in containers bearing
the manufacturer\'s label and used in accordance with printed
instructions.

[PART 3: EXECUTION]{.underline}

3.1 PREPARATION:

A. Protection: Protect adjacent surfaces from damage during application
of acoustical material.

B. Preparation: Installation of gypsum board shall have been done
according to Section 09260 ‑ Gypsum Board Systems and approved. Before
application, see that surfaces are clean and dry. The tile shall be
permitted to reach room temperature and have a stabilized moisture
content. The building shall be in proper condition to receive the
acoustical material before any of the material shall be installed. The
acoustical material shall be installed under conditions of normal
occupancy.

3.2 INSTALLATION/APPLICATION:

A. Grain of Tile: Run in direction of short dimension of room. Where one
space runs uninterrupted into another space, tile pattern shall run
continuous, the larger space taking precedence.

B. Adhesive Application: Apply an equal amount of adhesive to back of
tile at each corner so the resultant area of adhesive will be at least
16 in², or 4 in² per spot minimum.

C. General Application: Application of acoustical material shall be in
strict accordance with specifications of manufacturer. Seal joints in
acoustical tile around pipes, ducts, and electrical outlets with joint
sealant. Acoustical tile units shall be installed in a true and even
plane, in straight line courses laid out symmetrically about center
lines of ceiling or panel and shall finish uniformly at edges. Border
tile shall be not less than 6 inches wide. Neatly fit border tile
against vertical surfaces to form a tight joint. Exercise particular
care in applying equal amounts of adhesive (approximately walnut‑size)
to each corner of each successive tile. Also apply equal pressure to
each tile to assure the vertical alignment of joints. Consistently check
to see that newly applied tile is in an even plane with adjacent tile.
Tile noticeably out of alignment will be rejected.

[PART 4: MEASUREMENT AND PAYMENT]{.underline}

4.1 METHOD OF MEASUREMENT:

A. Units: The work described in this section will not be measured for
payment.

4.2 BASIS OF PAYMENT:

A. Payment: No direct payment for the work described under this section
will be made. The Contractor shall include consideration for this item
in the bid price for other items of the Contract.

END OF SECTION