Acoustic_Enclosure_Procurement_Spec_8045_0002.docx

NAVSSES-Acoustic Enclosure No. 2 Technical Specification Specification Number: 8045_0002 Date: 24 July 2015

24 July 2015

Table of Contents

Scope of this Specification This specification provides the technical requirements for the design, performance, installation, testing, and warranty of one Acoustic Enclosure.

This specification is broken down into the following sections:

1. Scope of this Specification

2. Description

3. Applicable Codes, Standards, and Regulations

4. Ratings, Conditions of Service and Warranty

5. Technical Requirements

6. General Requirements

7. Equipment and Services to be provided by the Government Throughout this specification the following terms apply:

1. “Contractor” refers to the Original Equipment Manufacturer (OEM) / Enclosure Provider.

2. “Government” refers to Naval Ship Systems Engineering Station, (NAVSSES).

3. “Manufacturer” refers to the party or parties that manufacture a part or parts of the equipment or material.

Description The Acoustic Enclosure shall be installed and utilized indoors on the Government provided site at NAVSSES, Philadelphia, PA. The Enclosure shall be a complete, integrated system of mutually dependent components and assemblies that form a steel Acoustic Enclosure consisting of acoustical absorbing material in a double skin metal panel, and framing and sub-framing to support the panels. The Enclosure is supported by, and integrated with, by a Government supplied platform and is otherwise independent of the test site and parent building that surrounds the Acoustic Enclosure. The Acoustic Enclosure shall incorporate structure as needed to support the structural and other ancillary loads and resist thermally induced movement.

The Contractor’s work shall include the furnishings of all supervision, labor, equipment, materials, tools, drawings, and the performance of all operations and incidentals necessary for: engineering, design, construction, fabrication, inspection, testing, documentation, delivery to the jobsite. The Acoustic Enclosure will be supplied by the Contractor and installed by the Government using Contractor installation procedures and on-site Contractor technical support.

The Acoustic Enclosure shall be provided by a recognized manufacturer with published standard of construction and technical performance. The manufacturer shall have produced a standard factory-fabricated panel system and components for at least five years. Performance of the fabricated and installed system shall conform to all specifications and requirements listed herein.

The manufacturer shall certify the performance of the Acoustic Enclosure, and perform testing of the completed assembly in the Contractor’s factory, recording the test noise level within the room and the test noise level outside the room, but within the parent building at a minimum of six locations. The Contractor may propose an option to carry out acoustic performance certification testing at the Government installation site.

Applicable Codes, Standards, and Regulations General Notes A. The Contractor shall submit to the Purchaser the necessary documentation throughout the project implementation to assure the performance of applicable tasks and services stipulated.

B. Unless otherwise specified, the equipment shall be designed, constructed, and tested in accordance with the applicable provisions of the following standards. The latest edition of the referenced document (including any amendments or corrections) applies, at the time of contract award.

C. Where a standard is referred to and conflicts with a part of this specification, the Purchaser shall be consulted in writing for immediate resolution.

D. When an equivalent standard to those identified in this specification are proposed by the Contractor, the Contractor shall notify the Purchaser in writing for immediate resolution.

Standards List

1. American Society for Testing and Materials:

a. ASTM A992/A992M - Standard Specification for Structural Steel Shapes

b. ASTM C423-09 - Standard Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method.

c. ASTM E1592 - Structural Performance of Sheet Metal Roof and Siding Systems by Uniform Static Air Pressure Difference.

d. ASTM E336-11 - Standard Test Method for Measurement of Airborne Sound Attenuation between Rooms in Buildings.

e. ASTM E90-09 - Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements.

f. ASTM E596-96 (2009) - Standard Test Method for Laboratory Measurement of Noise Reduction of Sound Isolating Enclosures.

g. ASTM E119 - 08a Standard Test Methods for Fire Tests of Building Construction and Materials.

International Code Council

a. International Building Code National Fire Protection Association

a. NFPA 70 National Electrical Code

b. NFPA 72 National Fire Alarm Code Department of Defense - Unified Facilities Criteria

a. UFC 3-530-01 Design: Interior and Exterior Lighting and Controls (formerly: lighting handbook) American Institute of Steel Construction

a. AISC 325 - Steel Construction Manual

b. AISC 341 - Seismic Provisions for Structural Steel Buildings

c. AISC 360 - Specification for Structural Steel Buildings American Society of Civil Engineers

a. ASCE 7 - Minimum Design Loads for Buildings and Other Structures American Welding Society

a. AWS D1.1/D1.1M - Structural Welding Code- Steel

b. AWS D1.3/D1.3M - Structural Welding Code – Sheet Steel Society for Protective Coatings

1. SSPC-SP 1 - Solvent Cleaning Ratings, Conditions of Service, and Warranty Product Ratings, Materials, and Workmanship

1. The Enclosure and associated equipment provided shall meet the performance data provided in the Technical Requirements Section.

Materials used for work performed under this contract shall be new, of the highest quality, and suitable for the intended service conditions.

Work shall be performed by skilled tradesmen in the various crafts and be executed in a first class and workmanlike manner in accordance with recognized good practice in the industry.

All welding procedures and personnel shall conform to the standards of The American Welding Society (AWS).

Conditions of Service

1. The Enclosure and associated equipment shall be located indoors in a heated and ventilated, industrial space and shall be designed for, and be protected against, these prevailing conditions.

1. Design and engineer acoustical Enclosure system capable of withstanding the effects of earthquake motions determined according to ASCE 7, AISC 341, and the applicable portions of the International Building Code.

1. The metal panel system design shall allow for thermal movements resulting from a temperature change of up to 120F from a 60F ambient condition without buckling, opening of joints, overstressing of components, failure of joint sealants, failure of connection, and other detrimental effects.

Acceptance, Performance Warranty and Defects Liability

1. Acceptance of the Enclosure and associated equipment by the Government shall follow the successful completion of all required tests including the review and approval of all Contractor test reports by the Government upon successful completion of all tests.

The Contractor shall warrant that the Enclosure and associated equipment supplied shall be entirely suitable for the intended service and is free from faults in design, and is of sufficient capability to meet the specified Technical Requirements.

The Contractor shall warrant the Enclosure and associated equipment for a period of at least twelve (12) months from the date of delivery. This shall warrant all items furnished by the Contractor against defects in design, material, and workmanship.

Technical Requirements Enclosure Dimensions

1. Enclosure No. 2 has inside dimensions of 20’-6” by 26’-4” by 14’-4” high.

1. Enclosure No. 2 panels shall be no thicker than 6” in order to fit on the supplied floor platform.

The arrangement of the Enclosure is as follows :

Figure 1: Acoustic Enclosure Dimensions, Door Locations and Spatial Limitations Plan View.

Figure 2: Acoustic Enclosure Dimensions, Door Locations and Spatial Limitations Side View Floor

1. The Acoustic Enclosure shall be installed on a Government supplied platform whose top surface is a structural I-beam grid topped with 3/8” thick steel diamond plate. The top plate of the platform will have Structural Damping applied to the underside of the steel plate.

1. The Contractor shall provide an analytical assessment of the planned Acoustic Enclosure damped plate floor and notify the Government if the planned arrangement is compatible with the acoustic performance requirements stated herein. The Contractor shall propose, as an option, supplemental below-floor acoustic treatments to be supplied by the Contractor and installed by the Government if the damped plate floor is predicted to be detrimental to the acoustic performance of the Enclosure.

Wall and Ceiling Panels

1. Wall and roof panels shall consist of 14 gauge (minimum) outer skin and 22 gauge (minimum) perforated inner skin with 18 gauge (minimum) stiffener channels. Maximum allowable panel thickness is 6 inches. The panels shall be filled with sound absorbing / damping material that is inert, mildew resistant, vermin proof, hydrophobic and incombustible. The density of the panel material shall be determined by the Manufacturer to meet specified acoustic performance. The sound absorbing / damping material shall be larger than the inside dimensions of the panel so that no voids result from possible fill compaction or settling.

1. Panel skins shall be welded and riveted to form a rugged metal-sheathed acoustical panel. Spot welds shall be not more than 3 in. apart.

1. Panels shall be connected to each other and to the Enclosure frame by use of secondary member shaped according to the type of joint configuration. The secondary member shall be made of 16 gauge (minimum) steel and shall be made to allow the use of self-tapping sheet metal screws to fasten it in place. The dead airspace between the panels and member shall be filled with acoustical blocking material and shall be acoustically sealed.

1. All wall and ceiling panels shall be capable of accepting field cuts to allow penetrations of piping ductwork and cableways without loss of acoustical rating or structural integrity. Contractor shall indicate on submittal drawings preferred locations and method for field penetrations.

Removable Sections

1. The ceiling of the Enclosure shall have a removable soft patch(s) for the installation, and removal of equipment to be located within the Enclosure. These soft patches shall be located as seen in Figures 1 and 2. The soft patches shall be constructed similar to the surrounding ceiling panels and shall also have provisions for locking the roof system using bolts or quick release dogs. The patches shall also be fitted with lifting lugs at each corner for removal.

1. The surrounding roof panels must be capable of supporting the dead weight of the soft patches, as well as the live load associated with the removal activity. At a minimum, the roof panels shall support a minimum point load of 300 lbs and uniform load of 40 lbs/ft2.

1. The Enclosure shall remain structurally stable without the removable soft patches installed.

1. The removable soft patch system shall include a lip on either the soft patch or ceiling structure to prevent soft patches from falling into the Enclosure.

Panel Joiners and Connectors

1. Panels shall be of welded construction, with or without internal reinforcement, and form a rugged module. Panels shall be joined to provide a mechanically and acoustically tight seal.

1. Cam-locks and similar externally operated mechanical fasteners and pressure gaskets shall not be permitted.

1. Peripheral ceiling channel system shall be designed to frame all panels into unified free –standing and self-supporting structure.

1. Floor framing channels shall have sound/vibration seals attached to the underside for acoustical seal and compensation for uneven surfaces. Wall panels will be set into channel frame in accordance with manufacturer’s detailed instructions. The joints of the soft patches with the surrounding roof panels shall be provided with suitable gasket material to preserve the sound transmission class rating of the Enclosure.

Acoustical Performance

1. The Contractor shall provide test data indicating sound absorption and transmission loss characteristics of the panel assembly. The performance shall meet the requirements defined in Sections 5.6.B and 5.6.C below. The performance testing shall have been performed by an accredited laboratory in accordance with ASTM Standards E90-09 and C423-08. Please note the additional frequency bands required in Sections 5.6.B and 5.6.C. The procedure to determine the absorption coefficient and transmission loss at these additional frequency bands shall be identical to that used for the nearest frequency band listed in the ASTM standard.

B. Sound Absorption Coefficients per ASTM C423-09:

One Third Octave Band Frequencies*

31.5, 50, 63, 100, 125, 200, 250, 400, 500, 800, 1000, 1600, 2000, 3150, 4000, 10,000

1.00

1.00

1.00

1.00

1.00

1.00

*Additional lower frequency one-third octave bands have been added to the standard bands

C. Sound transmission loss performance of Enclosure ASTM E90-09

One Third Octave Band Frequencies*

31.5, 50, 63, 100, 125, 200, 250, 400, 500, 800, 1000, 1600, 2000, 3150, 4000, 10,000

*Additional lower frequency one-third octave bands have been added to the standard bands

D. Upon completion of the Enclosure assembly, the Contractor shall, at his expense, engage the services of an independent acoustical consultant, or otherwise agreed upon organization, to test the Enclosure wall system in accordance with ASTM E596(2009) and ASTM C423-09. Results shall be reported at one third octave bands from 25 Hz to 20 kHz. Transmission loss test results from the assembled wall system shall not be less than 3 dB lower than the panel requirements defined in Sections 5.6.C. Measured Sound Absorption Coefficients shall not be less than 20% below the requirements defined in Section 5.6.B.

Doors

1. Noise-attenuation doors shall be sized and installed as shown in Figure 1.

1. All doors shall have safety glass ports installed. Windows shall consist of two (2) layers of safety glass sealed and separated by an air space with acoustically tight seals. The air space between shall contain a desiccant material to prevent fogging.

1. Door assemblies shall have sufficient acoustic performance to not degrade the performance of the enclosure system.

1. All doors shall be flush mounted and pre-hung assemblies complete with leaf, frame, seal, cam-lift hinges, glass and glazing and finish hardware. Door leaf shall be a factory welded split design and filled with an acoustical damping material. The assembly shall be designed to be installed after the Enclosure walls are assembled. Door leaves, frames, seals and hinges shall be factory assembled and adjusted prior to shipment. Acoustic performance of the assembly shall meet or exceed that of the wall.

1. Jambs and head of doors and frames shall have two sets of self-aligning, magnetic, sound absorptive compression seals. Latches shall not be required to hold the door closed or to achieve an acoustical seal. Bottom of door leaf shall contain continuous gravity compression seal and shall not have any moving parts. The door leaf shall compress against sill plate as door is closed by cam-lift action.

1. Doors shall be furnished with a minimum of two (2) cam-lift butt-type hinges finished in US 26D dull chrome. Hinges must meet fatigue test requirements of cycling a minimum of 125,000 times while supporting a door leaf of 550lb.

Lighting

1. Lighting Systems: The Enclosure shall be provided with a fixed lighting system that conforms to the guidelines of DoD UFC 3-530-01. The luminaries shall operate from a 120V, 60 cycle power system. The fixtures shall be attached to the underside of the Enclosure ceiling with necessary, mounting brackets, hardware and fasteners for surface mount installation which are designed for the type of ceiling construction in which the fixture is to be installed. All components, lights, wiring, fasteners and parts needed in the installation shall be provided.

1. Illumination Levels and Quantity of Fixtures: The Contractor shall provide sufficient number of industrial grade, interior, surface-mounted Light Emitting Diode (LED) lights as to provide a uniform horizontal luminance of 50 foot-candles (lumens per SQ FT) at the floor level of all work areas of the Enclosure. The luminaires shall be located to avoid interference with the removable roof patches; and should uniformly distribute light over the entire work area to avoid direct glare as well as to eliminate shadows or dark areas in the space.

1. Light Switches: The luminaries shall be provided with a surface mounted light switch adjacent to each door to operate all lights in the Enclosure.

1. Emergency Lighting: Ninety (90) minute wall mounted emergency battery powered lighting units that automatically turn on when normal utility power is lost, shall be provided to ensure a means of egress should power be lost. They shall maintain their battery system in a ready state thru an integral charging system. They shall have a push to test feature and shall have an automatic low voltage disconnect system to prevent battery damage following a normal battery discharge.

Electrical

1. All electrical equipment utilized shall be UL listed. All installation work shall be done in a professional manner and shall conform to the design and installation requirements of the latest edition of the National Electric Code (NEC).

1. All wiring shall be 600V, type THHN/THWN insulated with copper conductors and shall be pulled in surface mounted EMT conduit.

1. EMT conduit shall be made electrically continuous for grounding purposes. It is also required to route a grounding conductor within all conduit between source and all loads. EMT shall be interconnected utilizing compression fittings.

1. Two duplex receptacles (120VAC) shall be installed every 10 feet along the interior perimeter of the Enclosure with the wiring method described in section 5.9C above. These receptacles shall be powered by two twenty ampere circuits. All components, receptacles, boxes, wiring, fasteners and parts needed in the installation shall be provided by the Contractor.

Thermal Performance

1. The enclosure will house heat generating equipment for long periods of testing. The enclosure shall maintain its performance requirements (structural and acoustical) for temperatures inside the enclosure up to 125F.

The Enclosure shall have ventilation capable of dissipating 20,000 BTU/HR based on 90F outside temperature and a maximum internal temperature of 120F.

The ductwork shall be sized for low velocity, and all air devices shall be selected for nominal Noise Criteria (NC) of less than 20.

The ductwork shall be arranged such that cold air enters at the bottom of the Enclosure and hot air exits at the top of the Enclosure.

The ductwork shall be designed to meet or exceed the acoustic requirements of the Enclosure and include inline silencers as necessary. The ductwork penetrations shall not degrade the acoustical performance of the Enclosure.

The Contractor shall provide the air moving devices and ducting for the Government to mount elsewhere on the site in close proximity to the Enclosure.

Fire Alarm System

1. The Contractor shall provide a fire alarm system in accordance with NFPA 72 (National Fire Alarm Code). The Fire Alarm system shall consist of a Siemens Model SXL-EX conventional fire alarm control panel using Siemens PE-11 photo-electric smoke detectors (or equivalent). Manual pull stations and audio/visual (A/V) devices shall be installed in the Enclosure.

1. All initiating circuits (i.e., detectors, manual pull stations, etc) shall be provided and use 16 AWG, twisted single pair, solid copper conductor, shielded FPLP fire alarm cable. All A/V indicating circuits shall use 14 AWG, copper conductor, THHN/THWN cable. All circuits shall be pulled continuous from point to point, without splices.

1. All fire alarm wiring shall be installed in EMT conduit in accordance with NFPA 72 requirements. All fire alarm components and parts needed including boxes, wiring, fasteners needed in the installation shall be provided.

1. The fire alarm control panel shall be connected to the Government supplied BLDG 633 Master Fire Alarm Panel under the cognizance of the Government’s Representatives. The Contractor shall provide shop drawings/schematic diagrams indicating the material to be used and the terminations to be made in the BLDG 633 Master Fire Alarm Panel.

1. Formal Tests and Inspection of the Fire Alarm system shall be performed in accordance with NFPA 72 and shall be witnessed by Contractor and Government Representatives.

0. Finishes

1. All non-CRES materials shall be preserved with a paint system to prevent corrosion. Metal surfaces to receive paint shall be cleaned of rust and mill scale with welds ground smooth and filled as needed. Surfaces shall be degreased and cleaned in accordance with SSPC- 1, 1. Exposed Enclosure surfaces shall be primed with a rust inhibitive primer suitable to receive the Contractor applied final finish. Final finish treatments shall be proposed by the Contractor and approved by the Government. Contractor shall submit sample finish coat paint colors to the Government for selection and approval.

1. The Contractor shall provide sufficient paint to touch-up panels after installation of Enclosure systems General Requirements

0. Deliverables

1. The Contractor shall submit a detailed design of the Enclosure for Government review and approval prior to Enclosure production and support technical discussions with the Buyer as required to resolve potential design issues. The contractor shall provide all drawings and details to show that the design meets the requirements shown in sections 5.1, 5.2, 5.3, 5.4A, 5.5, 5.7A,B,D,E,F, 5.8A,B, C,D 5.9 D, 5.10 C,D, 5.11 A. (CDRL A003)

1. Product Data: The contractor shall submit acoustic performance data and test reports for wall and ceiling panels and doors in accordance with sections 4.1A, 4.3A, 5.6 A, B, C. The contractor shall indicate if the acoustic requirements are met. (CDRL A007)

1. The contractor shall submit acoustic performance test procedure for wall and ceiling panels and doors in accordance with sections 5.6 A, B, C. (CDRL A008)

1. The contractor shall provide operating and maintenance data for all products and/or equipment installed under this specification.(CDRL A013)

1. Building Design Analysis: The contractor shall provide certified engineering calculations by an authorized currently licensed professional engineer in Pennsylvania, having a minimum of four years’ experience as an engineer knowledgeable in building design analysis, protocols and procedures ASCE 7, and the International Building Code, to demonstrate the structural stability of the design. Design data and calculations shall be provided in accordance with sections 3.1 B, C, 5.2B, 5.4 C, 5.7C, D, 5.8B (CDRL A006).

1. Air Handling Equipment Calculations: The contractor shall provide certified engineering calculations for the selection of the air handling equipment. Design data and calculations shall be provided in accordance with sections 5.10A, B, C, E (CDRL A005).

1. Shop Drawings: Submit installation drawings showing constructed inside and outside dimensions, panel thickness and details, sizes and locations of doors. Drawings shall also show preferred location and details for field cuts. Field cut details shall provide adequate information on the procedure for performing field cuts, provide recommendations for cutting tools, flashing material and fasteners. Field cut openings include, but are not limited to, piping, ductwork, electrical cableway and electrical conduit penetrations. (CDRL A012)

1. Electrical drawings: Lighting diagrams and arrangement, shall be provided by the contractor in accordance with sections 5.8A, C, D, 5.9B, C, D, 5.11 A,B,C,D. The product data for switches, lighting fixtures, and fire alarm system components to be utilized shall also be provided. (CDRL A004)

1. Installation Instructions: Submit instructions that provide a clearly described step-by-step procedure for assembling and disassembling the Enclosure including the removable portion of the Enclosure. This includes, but is not limited to, information such as the necessary equipment, scaffolding, tools, rigging diagram, and detailed sequence for removing and erecting the removable elements. (CDRL A011)

1. Warranties: Provide manufacturer’s warranty documentation against defects in materials and workmanship for period of (12) months from the date of installation. Provide warranty documents for all third-party products and components as applicable.

1. The contractor shall provide progress reports, status and management reports in accordance with section 3.1. (CDRL A001)

1. The contractor shall submit acoustic performance data and test reports in accordance with sections 2D, 5.6 D. The contractor shall indicate if the acoustic requirements are met. (CDRL A009)

1. The contractor shall submit acoustic performance test procedure in accordance with sections 2D, 5.6 D. (CDRL A010) Installation and additional deliverables

1. Shipping and Packaging: The packaging and shipping of the Enclosure and all associated components and equipment covered by this specification are the responsibility of the Contractor. The Contractor is responsible for damage during shipment. (CDRL A002) BG. The Government will install the Enclosure on the test site platform in the designated location of Bldg 633. The Enclosure will rest directly on the platform and be anchored with the appropriate Contractor supplied hardware.

BH. The Contractor shall provide personnel at the Enclosure installation site to provide technical support for the Enclosure installation to be carried out by the Government.

BI. All Contractor personnel engaged in supporting the Government installation of the Enclosure shall be US citizens and to comply fully with the security and access control restrictions of this Government facility. The contractor shall provide a list of employees. (CDRL A015) BJ. The Contractor shall inspect and verify that the Government installation of the Enclosure is in strict accordance with approved shop drawings and procedures, and that positioning of all components is within the required tolerances and in accordance with the design criteria to ensure the target acoustic performance.

BK. The electrical and fire alarms systems shall be installed, tested and inspected as required by the provisions of this specification. (CDRL A014) Points of Contact for Installation

1. Points of Contact: The points of contact during installation shall be:

Naval Ship Systems Engineering Station, Philadelphia (NAVSSES) Naval Business Center Bldg 633 Philadelphia, PA 19112-5083 Points of Contact: Bill Higgins Office Phone: (215) 897-7234

Equipment and Services to be Provided by the Government

· Platform in support of the Enclosure

· On-site labor and material handling for installation of the Enclosure

· Cable, conduit, pipe and other Enclosure penetrations in accordance with Contractor construction details

· Power feed to support receptacle and lighting junction boxes

· Required fire suppression system

· Air handling equipment foundations

· Electric power

END OF SPECIFICATION

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