OR HVAC PH 2 - ADD 01 SPECS.pdf

OR HVAC System Upgrade PH 2 – Cheyenne, WY Addendum 01

Cheyenne VA Medical Center 04/24/2023

VA Design Contract #36C25922C0029

06-01-22

VA Project 442-21-012 01 01 10 - 1

DEPARTMENT OF VETERANS AFFAIRS

VHA MASTER SPECIFICATIONS

TABLE OF CONTENTS

Section 00 01 10

SECTION NO. DIVISION AND SECTION TITLES DATE

DIVISION 00 - SPECIAL SECTIONS

DIVISION 01 - GENERAL REQUIREMENTS

01 00 00 General Requirements 11-21

01 32 16.15 Project Schedules (Small Projects – Design/Bid/Build 11-21

01 33 23 Shop Drawings, Product Data, and Samples 06-21

01 35 26 Safety Requirements 11-21

01 42 19 Reference Standards 11-20

01 45 00 Quality Control 02-21

01 45 35 Special Inspections 06-21

01 57 19 Temporary Environmental Controls 01-21

01 58 16 Temporary Interior Signage 07-15

01 74 19 Construction Waste Management 04-22

01 81 13 Sustainable Construction Requirements 10-17

01 91 00 General Commissioning Requirements 04-22

DIVISION 02 – EXISTING CONDITIONS

02 41 00 Demolition 08-17

02 41 01 Cutting And Patching 06-22

02 41 02 Selective Demolition 06-22

DIVISION 03 – CONCRETE

DIVISION 04 – MASONRY

DIVISION 05 – METALS

05 12 00 Structural Steel Framing 11-18

DIVISION 06 – WOOD, PLASTICS AND COMPOSITES

06 10 00 Rough Carpentry 10-17

DIVISION 07 - THERMAL AND MOISTURE PROTECTION

07 81 00 Applied Fireproofing 10-17

07 84 00 Firestopping 01-21

07 92 00 Joint Sealants 04-22

DIVISION 08 - OPENINGS

VA Project 442-21-012 01 01 10 - 2

08 31 13 Access Doors and Frames 04-22

DIVISION 09 – FINISHES

09 22 16 Non-Structural Metal Framing 06-18

09 29 00 Gypsum Board 04-20

09 51 00 Acoustical Ceilings 12-18

09 65 16 Resilient Sheet Flooring 06-22

09 91 00 Painting 01-21

DIVISION 10 – SPECIALTIES

DIVISION 11 – EQUIPMENT

DIVISION 12 – FURNISHINGS

DIVISION 13 - SPECIAL CONSTRUCTION

13 05 41 Seismic Restraint Requirements for Non-Structural

Components

01-21

13 50 10 Integrated Modular Laminar Air Delivery Manifold System

DIVISION 14– CONVEYING EQUIPEMENT

DIVISION 21- FIRE SUPPRESSION

21 13 13 Wet-Pipe Sprinkler Systems 06-15

DIVISION 22 – PLUMBING

22 05 11 Common Work Results for Plumbing 09-20

22 63 00 Gas Systems for Laboratory and Healthcare Facilities 09-15

DIVISION 23 – HEATING, VENTILATING, AND AIR

CONDITIONING (HVAC)

23 05 11 Common Work Results for HVAC 04-22

23 05 12 General Motor Requirements for HVAC and Steam

Generation Equipment

02-20

23 05 41 Noise and Vibration Control for HVAC Piping and

Equipment

02-20

23 05 93 Testing, Adjusting, and Balancing for HVAC 02-20

23 07 11 HVAC and Boiler Plant Insulation 02-20

23 08 00 Commissioning of HVAC Systems 04-22

23 09 23 Direct-Digital Control System for HVAC 09-11

23 23 00 Refrigerant Piping 02-20

23 31 00 HVAC Ducts and Casings 02-20

23 36 00 Air Terminal Units 02-20

23 37 00 Air Outlets and Inlets 02-20

23 40 00 HVAC Air Cleaning Devices 03-20

VA Project 442-21-012 01 01 10 - 3

23 81 00 Decentralized Unitary HVAC Equipment 03-20

DIVISION 25 – INTEGRATED AUTOMATION

DIVISION 26 – ELECTRICAL

26 05 11 Requirements for Electrical Installations 01-16

26 05 19 Low-Voltage Electrical Power Conductors and Cables 01-17

26 05 26 Grounding and Bonding for Electrical Systems 01-17

26 05 33 Raceway and Boxes for Electrical Systems 01-18

26 05 73 Overcurrent Protective Device Coordination Study 01-18

26 09 43 Addressable Network Lighting Controls 02-20

26 24 16 Panelboards 01-18

26 27 26 Wiring Devices 01-18

26 29 21 Enclosed Switches and Circuit Breakers 01-17

26 36 23 Automatic Transfer Switches 01-17

26 51 00 Interior Lighting 01-18

26 55 71 Medical and Surgical Lighting Fixtures 01-18

DIVISION 27 – COMMUNICATIONS

27 05 11 Requirements for Communications Installations 09-19

27 05 26 Grounding and Bonding for Communications Systems 06-15

27 05 33 Raceways and Boxes for Communications Systems 10-18

27 10 00 Control, Communication and Signal Wiring 06-15

27 15 00 Communications Structured Cabling 01-16

DIVISION 28 – ELECTRONIC SAFETY AND SECURITY

DIVISION 31 – EARTHWORK

DIVISION 32 – EXTERIOR IMPROVEMENTS

DIVISION 33 – UTILITIES

DIVISION 34 – TRANSPORTATION

DIVISION 48 – Electrical Power Generation

APPENDIX A – Equipment Cutsheets & Layouts

B-D1-INT Steris – Hexavue Integration System OR3 & OR 4 Layout

D1-INT Steris – OR 1 thru OR 4 proposed Equipment Layout

A1122R Steris – Harmony EMS Equipment Boom, OR3 & OR4

A1122.1R Steris – Harmony Med Gas Boom, OR3 & OR4

M7480R Steris – Steris FP Patient Monitors, OR3 & OR4

M7481 Steris – A Series Surgical Light, OR1 & OR2

U0001 Steris – HarmonyAIR Surgical Lighting System, OR1 & OR2

U0001R Steris – HarmonyAIR Surgical Lighting System, OR3 & OR4

Cheyenne VA Medical Center 4/24/2023

VA Contract #36C25922C0029

10-01-17

07 81 00 - 1

SECTION 07 81 00

APPLIED FIREPROOFING

PART 1 - GENERAL

1.1 DESCRIPTION:

A. This section specifies spray-applied mineral fiber and cementitious coverings to provide fire resistance to interior structural steel members shown.

1.3 SUBMITTALS:

A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT

DATA, AND SAMPLES.

C. Installer qualifications.

D. Testing laboratory accreditations.

E. Manufacturer's Literature and Data:

1. Manufacturer's complete and detailed application instructions and specifications.

2. Manufacturer's repair and patching instructions.

F. Certificates:

1. Certificate from testing laboratory attesting fireproofing material and application method meet the specified fire ratings.

a. List thickness and density of material required to meet fire ratings.

b. Accompanied by complete test report and test record.

2. Manufacturer's certificate indicating sprayed-on fireproofing material supplied under the Contract is same within manufacturing tolerance as fireproofing material tested.

G. Miscellaneous:

1. Manufacturer's written approval of surfaces to receive sprayed-on fireproofing.

2. Manufacturer's written approval of completed installation.

3. Manufacturer's written approval of the applicators of fireproofing material.

1.3 PRODUCT DELIVERY, STORAGE AND HANDLING:

A. Deliver to job-site in sealed containers marked and labeled to show manufacturer's name and brand and UL certification markings of compliance with the specified requirements.

B. Remove damaged or opened containers from the site.

VA Contract #36C25922C0029

10-01-17

07 81 00 - 2

C. Store the materials off the ground, under cover, away from damp surfaces.

D. Keep dry until ready for use.

E. Remove materials that have been exposed to water before installation from the site.

1.4 FIELD CONDITIONS:

A. Temperature: Do not apply fireproofing when substrate or ambient temperature is below 4 degrees C (40 degrees F) unless temporary protection and heat are provided to maintain temperature at or above stated value during application and for 24 hours before and after application.

B. Humidity: Maintain relative humidity levels within limits recommended by fireproofing manufacturer.

C. Ventilation: Provide ventilation to properly dry the fireproofing after application. Provide a minimum of four (4) air exchanges per hour by forced air circulation. When permitted by Contracting Officer

Representative (COR), ventilate by natural circulation.

1.5 QUALITY ASSURANCE:

A. Installer Qualifications: A firm or individual certified, licensed, or otherwise qualified by fireproofing manufacturer as experienced and with sufficient trained staff to install manufacturer’s products according to specified requirements. Submit manufacturer’s certification that each installer is trained and qualified to install the specified fireproofing. Submit evidence that each installer has a minimum of three (3) years’ experience and a minimum of four (4) installations using the specified fireproofing.

B. Testing Laboratory Accreditation Requirements: Construction materials testing laboratories must be accredited by a laboratory accreditation authority. Submit a copy of the Certificate of Accreditation and Scope of Accreditation.

C. Test for fire endurance in accordance with ASTM E119, for fire rating specified, in a nationally recognized laboratory.

D. Manufacturer's inspection and approval of surfaces to receive fireproofing.

E. Manufacturer's approval of fireproofing applications.

F. Manufacturer's approval of completed installation.

VA Contract #36C25922C0029

10-01-17

07 81 00 - 3

G. Manufacturer's representative is to observe and advise at the commencement of application, and is required to visit the site as required thereafter for the purpose of ascertaining proper application.

H.

1.6 APPLICABLE PUBLICATIONS

A. Publications listed below form a part of this specification to the extent referenced. Publications are referenced in the text by the basic designation only.

B. ASTM International (ASTM):

C841-03(R2013)..........Installation of Interior Lathing and Furring

C847-14.................Metal Lath

E84-14..................Surface Burning Characteristics of Building

Materials

E119-12a................Fire Tests of Building Construction and

Materials

E605-93(R2011)..........Thickness and Density of Sprayed Fire-Resistive

Materials Applied to Structural Members

E736-00(R2011)..........Cohesion/Adhesion of Sprayed Fire-Resistive

Materials Applied to Structural Members

E759-92(R2011)..........The Effect of Deflection on Sprayed Fire-

Resistive Material Applied to Structural

Members

E760-92(R2011)..........Impact on Bonding of Sprayed Fire-Resistive

Material Applied to Structural Members

E761-92(R2011)..........Compressive Strength of Fire-Resistive Material

Applied to Structural Members

E859-93(R2011)..........Air Erosion of Sprayed Fire-Resistive Materials

Applied to Structural Members

E937-93(R2011)..........Corrosion of Steel by Sprayed Fire-Resistive

Material Applied to Structural Members

E1042-02(R2014).........Acoustically, Absorptive Materials Applied by

Trowel or Spray.

G21-13..................Determining Resistance of Synthetic Polymeric

Materials to Fungi

C. Underwriters Laboratories, Inc. (UL):

Fire Resistance Directory...Latest Edition including Supplements

VA Contract #36C25922C0029

10-01-17

07 81 00 - 4

D. Warnock Hersey (WH):

Certification Listings..Latest Edition

E. Factory Mutual System (FM):

Approval Guide..........Latest Edition including Supplements

F. Environmental Protection Agency (EPA):

40 CFR 59(2014).........National Volatile Organic Compound Emission

Standards for Consumer and Commercial Products

PART 2 - PRODUCTS

2.1 SPRAYED-ON FIREPROOFING:

A. ASTM E1042, Class (a), Category A.

1. Type I, factory mixed cementitious materials with approved aggregate.

2. Type II, factory mixed mineral fiber with integral inorganic binders minimum 240 kg per cubic meter (15 lb. per cubic feet) density per

ASTM E605 test unless specified otherwise. Use in areas that are completely encased.

B. Materials containing asbestos are not permitted.

C. Fireproofing characteristics when applied in the thickness and density required to achieve the fire-rating specified.

Characteristic Test Results

1. Deflection ASTM E759 No cracking, spalling, or delamination when backing to which it is applied has a deflection up to 1/120 in 3 m

(10 ft.)

2. Corrosion-Resistance ASTM E937 No promotion of corrosion of steel.

3. Bond Impact ASTM E760 No cracking, spalling, or delamination.

4. Cohesion/Adhesion

(Bond Strength)

ASTM E736 Minimum cohesive/adhesive strength of 9.57 kPa (200 lbf per

sq. ft.) for protected areas.

19.15 kPa (400 lbf per sq. ft.)

for exposed areas.

5. Air Erosion ASTM E859 Maximum gain weight of the collecting filter

0.27 gm per sq. meter

(0.025 gm per sq. ft.).

VA Contract #36C25922C0029

10-01-17

07 81 00 - 5

6. Compressive Strength ASTM E761 Minimum compressive strength

48 kPa (1000 psf).

7. Surface Burning

Characteristics with adhesive and sealer to be used

ASTM E84 Flame spread 25 or less smoke developed 50 or less

8. Fungi Resistance ASTM G21 Resistance to mold growth when inoculated with aspergillus niger

(28 days for general application)

2.2 ADHESIVE:

A. Bonding adhesive for Type II (fibrous) materials as recommended and supplied by the fireproofing material manufacturer.

B. Adhesive may be an integral part of the material or applied separately to surface receiving fireproofing material.

2.3 SEALER:

A. Sealer for Type II (fibrous) material as recommended and supplied by the fireproofing material manufacturer.

B. Surface burning characteristics as specified for fireproofing material.

C. Fungus resistant.

D. Sealer may be an integral part of the material or applied separately to the exposed surface. When applied separately use contrasting color pigmented sealer, white preferred.

2.4 WATER:

A. Clean, fresh, and free from organic and mineral impurities.

B. pH of 6.9 to 7.1.

2.5 MECHANICAL BOND MATERIAL:

A. Expanded Metal Lath: ASTM C847, minimum weight of 0.92 kg per square meter (1.7 pounds per square yard) or as required, according to fire-resistance designs indicated and fire proofing manufacturer’s written instructions.

B. Fasteners: ASTM C841.

C. Reinforcing Fabric: Glass- or carbon-fiber fabric of type, weight, and form required to comply with fire-resistance designs indicated;

approved and provided by fireproofing manufacturer.

D. Reinforcing Mesh: Metallic mesh reinforcement of type, weight, and form required to comply with fire-resistance design indicated; approved and provided by fireproofing manufacturer. Include pins and attachments.

VA Contract #36C25922C0029

10-01-17

07 81 00 - 6

PART 3 - EXECUTION

3.1 EXAMINATION:

A. Verify surfaces to receive fireproofing are clean and free of dust, soot, oil, grease, water soluble materials or any foreign substance which would prevent adhesion of the fireproofing material.

B. Verify hangers, inserts and clips are installed before the application of fireproofing material.

C. Verify ductwork, piping, and other obstructing material and equipment is not installed that will interfere with fireproofing installation.

D. Verify concrete work on steel decking and concrete encased steel is completed.

E. When applied in conjunction with roof structures or roof decks, verify that roofing, installation of rooftop HVAC equipment, and other related work are complete.

F. Verify temperature and enclosure conditions required by fire-proofing material manufacturer.

G. Conduct tests according to fireproofing manufacturer’s written instructions to verify that substrates are free of substances capable of interfering with bond. Submit test report.

3.2 APPLICATION:

A. Do not start application until written approval has been obtained from manufacturer of fireproofing materials that surfaces have been inspected by the manufacturer or his representative, and are suitable to receive sprayed-on fireproofing.

B. Coordinate application of fireproofing material with other trades.

C. Cover other work and exterior openings subject to damage from fallout or overspray of fireproofing materials during application.

D. Application of Metal Lath:

1. Apply to beam and columns having painted surfaces which fail

ASTM E736 Bond Test requirements in pre-application test area.

2. Apply to beam flanges 305 mm (12-inches) or more in width.

3. Apply to column flanges 406 mm (16-inches) or more in width.

4. Apply to beam or column web 406 mm (16-inches) or more in depth.

5. Tack weld or mechanically fasten on maximum of 305 mm (12-inch) center.

6. Lap and tie lath member in accordance with ASTM C841.

E. Mix and apply in accordance with manufacturer's instructions.

VA Contract #36C25922C0029

10-01-17

07 81 00 - 7

1. Mechanically control material and water ratios.

2. Apply adhesive and sealer, when not an integral part of the materials, in accordance with the manufacturer's instructions.

3. Apply to density and thickness indicated in UL Fire Resistance

Directory, FM Approval Guide, or WH Certification Listings unless specified otherwise. Test in accordance with ASTM E119.

4. Minimum ASTM E605 applied dry density per cubic meter (cubic foot) for the underside of the walk on deck (interstitial) hung purlin or beam and steel deck, columns in interstitial spaces and mechanical equipment rooms to be as follows:

a. Type II - 240 kg per cubic meter (15 lb. per cubic ft.).

F. Complete application is to be completed in one area. Inspection and approval by COR is required before removal of application equipment and proceeding with further work.

3.3 FIELD TESTS:

A. The applied fireproofing to be tested by a COR approved independent testing laboratory and paid for by the Contractor. Submit test reports documenting results of tests on the applied material in the project.

B. COR will select area to be tested in specific bays on each floor using a geometric grid pattern. Apply test sample every 929 square meters

(10,000 square feet) of floor area or two (2) for each floor, whichever produces the greatest number of test areas.

C. Test for thickness and density in accordance with ASTM E605. Areas showing thickness less than that required as a result of fire endurance test are not acceptable.

D. Areas showing less than required fireproofing characteristics are not suitable for the following field tests.

1. Test for cohesion/adhesion: ASTM E736.

2. Test for bond impact strength: ASTM E760.

3.4 PATCHING AND REPAIRING:

A. Inspect after mechanical, electrical and other trades have completed work in contact with fireproofing material, but before sprayed material is covered by subsequent construction.

B. Perform corrective measures in accordance with fireproofing material manufacturer's recommendations.

1. Respray areas requiring additional fireproofing material to provide the required thickness, and replace dislodged or removed material.

VA Contract #36C25922C0029

10-01-17

07 81 00 - 8

2. Spray material for patching by machine directly on point to be patched, or into a container and then hand apply.

3. Do not hand mix material.

C. Repair:

1. Respray test and rejected areas.

2. Patch fireproofing material which is removed or disturbed after approval.

D. Perform final inspection of sprayed areas after patching and repair.

3.6 SCHEDULE:

A. Apply fireproofing material in interior structural steel members and on underside of interior steel floor and roof decks

Fire Rating Schedule

Type Element Hourly Rating UL Design

Reference

II Columns supporting one floor 1 UL X854

II Columns supporting more than one floor

1 UL X854

II Columns supporting roof 1 UL X854

II Floor decks 1 UL P908

II Floor supports 1 UL P908

II Roof decks 1 UL P908

II Roof supports 1 UL X854

- - - E N D - - -

VA Contract #36C25922C0029

12-01-18

VA Project 442-21-012 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 ceilings.

1.2 APPLICABLE PUBLICATIONS

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

B. ASTM International (ASTM):

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

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

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

3. C423-09a - Sound Absorption and Sound Absorption Coefficients by the

Reverberation Room Method.

4. C634-13 - Terminology Relating to Environmental Acoustics.

5. C635/C635M-13a - Manufacture, Performance, and Testing of Metal

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

6. C636/C636M-13 - Installation of Metal Ceiling Suspension Systems for

Acoustical Tile and Lay-in Panels.

7. D1779-98(2011) - Adhesive for Acoustical Materials.

8. E84-15b - Surface Burning Characteristics of Building Materials.

9. E119-16 - Fire Tests of Building Construction and Materials.

10. E413-16 - Classification for Rating Sound Insulation.

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

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

Ground Motions.

12. E1264-14 - Classification for Acoustical Ceiling Products.

C. International Organization for Standardization (ISO):

1. ISO 14644-1 - Classification of Air Cleanliness.

1.3 SUBMITTALS

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

B. Submittal Drawings:

1. Show size, configuration, and fabrication and installation details.

C. Manufacturer's Literature and Data:

VA Contract #36C25922C0029

VA Project 442-21-012 09 51 00 - 2

1. Description of each product.

2. Ceiling suspension system indicating manufacturer recommendation for each application.

3. Installation instructions.

4. Warranty.

D. Samples:

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

a. Submit quantity required to show full color and texture range.

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

3. Colored markers for access service.

4. Approved samples may be incorporated into work.

E. Certificates: Certify each product complies with specifications.

1. Acoustical units, each type.

F. Qualifications: Substantiate qualifications comply with specifications.

1. Manufacturer

G. Operation and Maintenance Data:

1. Care instructions for each exposed finish product.

1.4 QUALITY ASSURANCE

A. Manufacturer Qualifications:

1. Regularly manufactures specified products.

2. Manufactured specified products with satisfactory service on five similar installations for minimum five years.

1.5 DELIVERY

A. Deliver products in manufacturer's original sealed packaging.

B. Mark packaging, legibly. Indicate manufacturer's name or brand, type, production run number, and manufacture date.

C. Before installation, return or dispose of products within distorted, damaged, or opened packaging.

1.6 STORAGE AND HANDLING

A. Store products indoors in dry, weathertight facility.

B. Protect products from damage during handling and construction operations.

1.7 FIELD CONDITIONS

A. Environment:

VA Contract #36C25922C0029

VA Project 442-21-012 09 51 00 - 3

1. Product Temperature: Minimum 21 degrees C (70 degrees F) for minimum

48 hours before installation.

2. Work Area Ambient Conditions: HVAC systems are complete, operational, and maintaining facility design operating conditions continuously, beginning 48 hours before installation until

Government occupancy.

3. Install products when building is permanently enclosed and when wet construction is completed, dried, and cured.

1.8 WARRANTY

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

Construction."

PART 2 - PRODUCTS

2.1 SYSTEM DESCRIPTION

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

2.2 SYSTEM PERFORMANCE

A. Design product complying with specified performance:

1. Maximum Deflection: 1/360of span, maximum.

B. Fire Resistance: ASTM E119; as component of 1 2 hour rated.

C. Surface Burning Characteristics: When tested according to ASTM E84.

1. Flame Spread Rating: 25 maximum.

2. Smoke Developed Rating: 450 maximum.

2.3 PRODUCTS - GENERAL

A. Provide acoustical units from one manufacturer.

1. Provide each product exposed to view from one production run.

B. Provide suspension system from same manufacturer.

2.4 ACOUSTICAL UNITS

A. General:

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

USDA Bio-Preferred Product requirements.

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

2. Classification: Provide type and form as follows:

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

(5/8 inch) thick.

VA Contract #36C25922C0029

VA Project 442-21-012 09 51 00 - 4

b. Type IV Units - Mineral base with membrane-faced overlay, Form 2

- Water felted, minimum 16 mm (5/8 inch) thick. Apply poly

(vinyl) chloride over paint coat.

c. NRC (Noise Reduction Coefficient): ASTM C423, minimum 0.55 unless specified otherwise.

d. CAC (Ceiling Attenuation Class): ASTM E413, 40-44 range unless specified otherwise.

e. LR (Light Reflectance): Minimum 0.75.

3. Lay-in panels: match existing tile size and profile.

B. SPECIAL FACED ACOUSTICAL TILE UNITS AT(SP): Anti-microbial coated surfaces suitable for use in Class 5 Clean Rooms per ISO 14644-1.

Special faced acoustical tile units shall meet all general requirements stated in this specification.

2.5 METAL SUSPENSION SYSTEM

A. General: ASTM C635, heavy-duty system, except as otherwise specified.

1. Suspension System: Provide the following:

a. Galvanized cold-rolled steel, bonderized. Fire resistant plastic (glass fiber).

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 panels.

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.

C. Concealed Grid Suspension System: Mineral base acoustical tile support.

1. Concealed grid upward access suspension system initial opening, 300 mm by 600 mm (12 by 24 inches).

2. Flange Width: 22 mm (7/8 inch) minimum except:

a. Access Hook and Angle: 11 mm (7/16 inch) minimum.

D. Suspension System Support of Metal Type V, VI, and VII Tiles: Concealed grid type with runners for snap-in attachment of metal tile (pans).

E. Carrying Channels Secondary Framing: Cold-rolled or hot-rolled steel, black asphaltic paint finish, rust free.

1. Weight per 300 m (per thousand linear feet), minimum:

VA Contract #36C25922C0029

VA Project 442-21-012 09 51 00 - 5

Size Cold-rolled Hot-rolled mm inches kg pound kg pound

38 1-1/2 215.4 475 508 1120

50 2 267.6 590 571.5 1260

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

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

a. Nailing type option for wood forms:

1) Upper portion designed for anchorage in concrete and positioning lower portion below surface of concrete approximately 25 mm (one inch).

2) Lower portion provided with minimum 8 mm (5/16 inch) hole to permit attachment of hangers.

b. Flush ceiling insert type:

1) Designed to provide a shell covered opening over a wire loop to permit attachment of hangers and keep concrete out of insert recess.

2) Insert opening inside shell approximately 16 mm (5/8 inch) wide by 9 mm (3/8 inch) high over top of wire.

3) Wire 5 mm (3/16 inch) diameter with length to provide positive hooked anchorage in concrete.

G. Clips: Galvanized steel, designed to secure framing member in place.

H. Tile Splines: ASTM C635.

I. 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 inch).

2.6 ACCESSORIES

A. Adhesives: Low pollutant-emitting, water based type recommended by adhered product manufacturer for each application.

B. 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 coating on one side.

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

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

VA Contract #36C25922C0029

VA Project 442-21-012 09 51 00 - 6

C. 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 PREPARATION

A. Examine and verify substrate suitability for product installation.

B. Protect existing construction and completed work from damage.

C. Remove existing acoustical panels suspension system to permit construction scope.

1. Retain existing acoustical panels / suspension system for reuse.

2. Dispose of removed materials.

3.2 INSTALLATION - GENERAL

A. Install products according to manufacturer's instructions and approved submittal drawings .

1. When manufacturer's instructions deviate from specifications, submit proposed resolution for Contracting Officer's Representative consideration.

3.3 ACOUSTICAL UNIT INSTALLATION

A. Applications:

1. Cut acoustic units for perimeter borders and penetrations to fit tight against penetration for joint not concealed by molding.

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

C. Installation:

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

VA Contract #36C25922C0029

VA Project 442-21-012 09 51 00 - 7

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. Tile in concealed grid upward access suspension system:

a. Install acoustical tile with joints close, straight and true to line, and with exposed surfaces level and flush at joints.

b. Make corners and arises full, and without worn or broken places.

c. Locate acoustical units providing access to service systems.

4. Adhesive applied tile:

a. Condition of surface according to ASTM D1779, Note 1, Cleanliness of Surface, and Note 4, Rigidity of Base Surface.

b. Size or seal surface as recommended by manufacturer of adhesive and allow to dry before installing units.

5. 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.

D. Touch up damaged factory finishes.

1. Repair painted surfaces with touch up primer.

3.4 CEILING SUSPENSION SYSTEM INSTALLATION

A. General: Install according to ASTM C636.

1. Use direct or indirect hung suspension system or combination of both.

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

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

4. Provide additional hangers located at each corner of support components.

5. Provide minimum 100 mm (4 inch) clearance from the exposed face of the acoustical units to the underside of ducts, pipe, conduit, secondary suspension channels, concrete beams or joists; and steel beam or bar joist unless furred system is shown.

VA Contract #36C25922C0029

VA Project 442-21-012 09 51 00 - 8

6. Provide main runners minimum 1200 mm (48 inches) in length.

7. Install hanger wires vertically. Angled wires are not acceptable except for seismic restraint bracing wires.

B. Direct Hung Suspension System: ASTM C635.

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

2. Maximum spacing of hangers, 1200 mm (4 feet) on centers unless interference occurs by mechanical systems. Use indirect hung suspension system where not possible to maintain hanger spacing.

C. Anchorage to Structure:

1. Concrete:

a. Install hanger inserts and wire loops required for support of hanger // and bracing // wire. Install hanger wires with looped ends through steel deck when steel deck does not have attachment device.

b. Use eye pins or threaded studs with screw-on eyes in existing or already placed concrete structures to support hanger // and bracing // wire. Install in sides of concrete beams or joists at mid height.

2. Steel:

a. Install carrying channels for attachment of hanger wires.

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

2) Attach hangers to steel carrying channels, spaced four feet on center, unless area supported or deflection exceeds the amount specified.

b. Attach carrying channels to the bottom flange of steel beams spaced not 1200 mm (4 feet) on center before fireproofing is installed. Weld or use steel clips for beam attachment.

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

D. Indirect Hung Suspension System: ASTM C635.

1. Space carrying channels for indirect hung suspension system maximum

1200 mm (4 feet) on center. Space hangers for carrying channels

VA Contract #36C25922C0029

VA Project 442-21-012 09 51 00 - 9 maximum 2400 mm (8 feet) on center or for carrying channels less than 1200 mm (4 feet) or center so as to insure that specified requirements are not exceeded.

2. Support main runners by specially designed clips attached to carrying channels.

E. Seismic Ceiling Bracing System:

1. Install according to ASTM E580.

2. Connect bracing wires to structure above as specified for anchorage to structure and to main runner // or carrying channels // of suspended ceiling at bottom.

3.5 CEILING TREATMENT

A. Moldings:

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

2. Install special shaped molding at changes in ceiling heights and at other breaks in ceiling construction to support acoustical 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.

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

C. Existing ceiling:

1. Where extension of existing ceilings occurs, match existing.

2. Where acoustical units are salvaged and reinstalled or joined, use salvaged units within a space. Do not mix new and salvaged units within a space which results in contrast between old and new acoustic units.

3. Comply with specifications for new acoustical units for new units required to match appearance of existing units.

D. Fire-Rated System:

1. Total assembly, consisting of the ceiling suspension system, acoustical units, penetrations, structural components and floor or roof construction above, shall have a // 1 hour // 2 hour // 3 hour // fire rating based on tests conducted in conformance with

ASTM E119.

VA Contract #36C25922C0029

VA Project 442-21-012 09 51 00 - 10

2. Provide concealed fire protection around penetrations in ceilings for electric and mechanical work, and other penetrations as required to maintain the integrity of the fire-rated assembly.

3. Install fire rated ceiling systems to conform to tested assembly.

3.6 CLEANING

A. Remove excess adhesive before adhesive sets.

B. Clean exposed surfaces. Remove contaminants and stains.

- - - E N D - - -