July 22, 1994

Contract #TW0592

SPECIAL SPECIFICATION

SECTION 09511-S

[ACOUSTICAL PANEL CEILING]{.underline}

Page

[PART 1 - GENERAL]{.underline}

1.01 Description Of Work 2

1.02 Submittals 2

1.03 Quality Assurance 3

1.04 Delivery, Storage And Handling 3

1.05 Project Conditions 3

PART 2 - PRODUCTS

2.01 Acceptable Manufacturers 3

2.02 Ceiling Panels 4

2.03 Ceiling Suspension Materials 5

2.04 Security System 6

PART 3 - EXECUTION

3.01 Examination 6

3.02 Preparation 6

3.03 Installation 6

3.04 Field Quality Control 7

3.05 Clean And Adjust 7

SPECIAL SPECIFICATION

SECTION 09511-S

[ACOUSTICAL PANEL CEILING]{.underline}

# PART 1 - GENERAL

## 1.01 [DESCRIPTION OF WORK]{.underline}

[This section]{.underline} includes acoustical panel ceilings installed
with exposed suspension systems. Extent of acoustical ceiling is shown
on the contract drawings.

## 1.02 [SUBMITTALS]{.underline}

A. [Manufacturer\'s product specifications]{.underline} and installation
instructions for each acoustical ceiling material, suspension system,
and security lay-in system including certified laboratory test reports
and other data as required to show compliance with these specifications.

> Provide manufacturer\'s recommendations for cleaning and refinishing
> acoustical units, including precautions against materials and methods
> which may be detrimental to finishes and acoustical performances.

B. Coordination drawings for reflected ceiling plans drawn accurately to
scale and coordinating penetrations and ceiling-mounted items. Show the
following:

1\. Ceiling suspension system members.

2\. Method of attaching suspension system hangers to building structure
including seismic bracing.

3\. Typical ceiling-mounted items including light fixtures; air outlets
and inlets; speakers; sprinklers; and special moldings at walls, column
penetrations, and other junctures of acoustical ceilings with adjoining
construction.

4\. Minimum Drawing Scale: 1/4 inch = 1 foot.

C. Samples for verification of each type of exposed finish required,
prepared on samples of size indicated below. Where finishes involve
normal color and texture variations, include sample sets showing the
full range of variations expected.

1\. Full-size samples of each acoustical panel type, pattern, and color.

2\. Set of 12-inch-long samples of exposed suspension system members,
including moldings, for each color and system type required.

D. [Material Safety Data Sheet (MSDS)]{.underline} required for the
ceiling panels.

E. [Installer experience]{.underline} qualification data.

F. [Product test reports]{.underline} on the ceiling panels that show
compliance with the requirements of ASTM E 84 for flame spread and smoke
developed.

## 1.03 [QUALITY ASSURANCE]{.underline}

A. [Installer Qualifications]{.underline}: Firm with not less than 3
years of successful experience in installation of acoustical ceilings
similar to requirements for this project and which is acceptable to
manufacturer of acoustical units.

B. [Fire Performance Characteristics]{.underline}: Acoustical ceilings
are specified to comply with fire hazard classification for flame spread
and smoke developed. Provide acoustical materials that have been tested,
rated and labeled by Underwriter\'s Laboratories (UL), as listed in the
latest edition of \"Building Materials Directory.\"

1\. [Flame Spread]{.underline}: Maximum 25 per ASTM E 84.

2\. [Smoke Developed]{.underline}: Maximum 50 per ASTM E 84.

C. [All products]{.underline} used shall not contain asbestos fibers.

## 1.04 [DELIVERY, STORAGE AND HANDLING]{.underline}

[Deliver]{.underline} stock of maintenance material to the Sandia
Delegated Representative (SDR), if indicated in the contract documents.
Furnish full-size units matching installed units, packaged in cartons
for storage and identified with appropriate labels, including building
and room numbers.

## 1.05 [PROJECT CONDITIONS]{.underline}

[Do not install]{.underline} interior acoustical ceilings until space is
enclosed and weatherproof, wet work in space is completed and nominally
dry, work above ceilings is completed, and ambient conditions of
temperature and humidity will be continuously maintained at values near
those indicated for final occupancy.

# PART 2 - PRODUCTS

## 2.01 [ACCEPTABLE MANUFACTURERS]{.underline}

A. Acoustic Panels

1\. Armstrong World Industries, Inc.

2\. USG Interiors, Inc.

3\. Celotex Building Products Division, The Celotex Corporation

B. Ceiling Suspension System

1\. Armstrong World Industries, Inc.

2\. Celotex Building Products Division, The Celotex Corporation

3\. Chicago Metallic Corp.

4\. Donn Corp.

5\. National Rolling Mills

6\. USG Interiors, Inc.

C. Security Clips

1\. You-Nique

## 2.02 [CEILING PANELS]{.underline}

A. Minaboard Cortega Fire Guard #823 white, as manufactured by Armstrong
World Industries, Inc. or Omni fissured Fire Code as manufactured by USG
Corp.

Wet-formed Mineral Fiber Acoustical Panels with square cut lay-in edge,
24 inches by 24 inches by 5/8 inch thick and of density not less than
1.0 pound per cubic foot, medium-course nondirectional texture, NRC 0.55
to 0.60, STC 40 to 44, light reflectance over 0.80 and average R
insulation factor at 75 degrees F of 1.5.

B. Grooved Crossgate #2628 white, as manufactured by Armstrong World
Industries, Inc.

Wet-formed Mineral Fiber Acoustical Panels with two tegular cut edges,
24 inches by 24 inches by 3/4 inch thick and of density not less than
0.8 pound per cubic foot, semiconcealed five plank design, NRC 0.40, STC
35 to 39, light reflectance over 75 percent and average R insulation
factor at 75 degrees F of 1.8.

C. Vinyl Faced Acoustic Tile: ML Fireguard manufactured by Armstrong
World, Inc.

1\. Material: wet formed mineral board

2\. Nonperforated

3\. Edge Condition: square cut lay-in

4\. Size: 24 inches by 24 inches by 5/8 inch

5\. Color: white

2.03 [CEILING SUSPENSION MATERIALS]{.underline}

A. [General]{.underline}: Comply with ASTM C 635, as applicable to type
of suspension system required for type of ceiling units indicated.

B. [Structural Class]{.underline}: Intermediate-duty system.

C. [Attachment Devices]{.underline}: Follow manufacturer\'s
requirements.

> Hanger Wires: ASTM A 641, galvanized carbon steel, soft temper,
> prestretched, 12 gauge (0.106\") minimum.

D. [Type of System]{.underline}: A direct-hung suspension system shall
be used, unless existing building conditions restrict this system, and
then the indirect-hung suspension system with carrying channels shall be
used. The carrying channels shall be 1-1/2\" steel channels, hot-rolled
or cold-rolled, not less than 0.1475 pounds per linear foot, galvanized.

E. [System Manufacturer]{.underline}: Obtain suspension system from the
acoustical unit manufacturer or from one of the following:

> Chicago Metallic Corp.
>
> Donn Corp.
>
> W. J. Haertel Div., Leslie-Locke
>
> National Rolling Mills Co.

F. [Edge Moldings]{.underline}: Manufacturer\'s standard channel
moldings for edges and penetrations of ceiling, with single flange of
molding exposed, white baked enamel finish unless otherwise indicated.

1\. For circular penetrations of ceiling, provide edge moldings
fabricated to diameter required to fit penetration exactly.

G. [Exposed Suspension System]{.underline}: Manufacturer\'s standard
exposed runners, cross-runners and accessories, with exposed
cross-runners coped to lay flush with main runners.

> For finish of exposed members, provide manufacturer\'s standard baked
> enamel finish, white, on exposed surfaces of ceiling suspension
> system, including moldings, trim and accessories, unless otherwise
> noted on drawings.

1\. Size: 15/16 inch

H. [Hold-down Clips]{.underline}: Provide manufacture's standard
hold-down clips.

## 2.04 [SECURITY]{.underline} [CLIPS]{.underline}

A. Provide Security Clips manufactured by You-Nique.

# PART 3 - EXECUTION

## 3.01 [EXAMINATION]{.underline}

[Contractor shall examine]{.underline} conditions under which acoustical
ceiling work is to be performed and must notify the SDR in writing of
unsatisfactory conditions. Do not proceed with work until unsatisfactory
conditions have been corrected in a manner acceptable to SDR.

## 3.02 [PREPARATION]{.underline}

A. [Coordination]{.underline}: Furnish layouts for inserts, clips or
other supports required to be installed by other trades for support of
acoustical ceilings.

B. [Field verify]{.underline}: 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, and
comply with reflected ceiling plans.

## 3.03 [INSTALLATION]{.underline}

A. [General]{.underline}: Install materials in accordance with
manufacturer\'s printed instructions, and to comply with governing
regulations, fire resistance rating requirements as indicated, and
industry standards applicable to work.

> Space main runners at 48\" o.c. and supported at 48\" o.c. maximum
> with cross T\'s at 24\" o.c.

B. [Acoustical Panels]{.underline}: Arrange as shown on reflected
ceiling plans. Install acoustical panels in coordination with suspension
system, with edges concealed by support of suspension members. Scribe
and cut panels to fit accurately at borders and at penetrations.

C. [Suspension System]{.underline}: Install suspension systems as
recommended in ASTM C 636 and E 580 with hangers supported only from
building structural members.

1\. Locate hangers not more than 8\" from each end and spaced 4\'-0\"
maximum along each main runner, or for the indirect-hung system, along
each carrying channel, unless otherwise indicated, leveling to tolerance
of 1/8\" in 12\'-0\".

2\. 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. Attachment devices shall be connected
only to a structural building member (beams, joists, precast \"T\").

3\. Grid system shall be seismically braced in accordance with the
requirements of ASTM E 580.

4\. Cross runners supported with 12-gage vertical wires attached to the
building structure shall be provided at each end of each surface-mounted
lighting fixture.

D. [Edge Moldings]{.underline}: Install edge moldings at perimeter of
acoustical ceiling area and at locations where necessary to conceal
edges of acoustical units. Place a bead of white silicone caulk between
molding and wall edge to conceal irregular edges.

1\. Screw-attach moldings to substrate at intervals not over 16\" o.c.
into studs and not more than 3\" from ends, level with ceiling
suspension system. Miter corners accurately and connect securely.

2\. Do not use exposed fasteners, including pop rivets on moldings and
trim.

E. Install Security Clips in rooms with vault type ceilings.

F. Install hold-down clips on vinyl-faced tile.

## 3.04 [FIELD QUALITY CONTROL]{.underline}

[Coordinate]{.underline} with other work supported by or penetrating
through ceiling, including any light fixtures, HVAC equipment, or
partition system.

## 3.05 [CLEAN AND ADJUST]{.underline}

A. [Clean]{.underline} exposed surfaces of acoustical ceilings,
including trim, edge moldings and suspension members; comply with
manufacturer\'s instructions for cleaning and touch-up of minor finish
damage.

B. [Remove and replace]{.underline} work which cannot be successfully
cleaned and repaired to permanently eliminate evidence of damage.

END OF SECTION