Section 11 61 13 Acoustical Shells

Section 11 61 13 Acoustical Shells

Wenger Legacy Classic Acoustical Shells

Wenger's Legacy Classic Acoustical Shells provide excellent acoustical performance in performing arts environments. Legacy Classic is the beneficiary of decades of pioneering work by Wenger, and we believe the shell offers acoustic qualities required for small to medium sized performance spaces. The shell improves the cross communication between ensemble members, and helps to project sound out into the audience.

We recommend you consult with your Wenger architectural representative, who can be contacted at: Wenger Corporation, Owatonna, MN, 800-4WENGER (800-493-6437), Email: , Website: .

Founded in 1946, Wenger pioneered modular, relocatable, sound-isolated music practice rooms. Wenger has a proud history of manufacturing the finest products for Elementary and Secondary Music Education and Performance. Over the years, Wenger has expanded this tradition of quality by developing product solutions for the unique requirements of Colleges & Universities, Performing Arts Centers, Theatre, Places of Worship, Athletic Facilities, Rental and Event companies, as well as City, State and Federal Government organizations.

Today, Wenger is a global supplier of products with a reputation for durability and versatility providing customers with real value and proven return on their investment. Wenger also takes pride in offering technical support and expert consultation for new construction and renovation projects, as well as existing facilities.

Wenger products appear in the following CSI MasterFormat™ 2010 Sections:

Section 01 35 13 - Special Project Procedures for Music Education Facilities

Section 08 34 72 - Sound Control Door Assemblies

Section 09 84 00 - Acoustic Room Components

Section 10 11 00 - Visual Display Surfaces

Section 10 50 00 - Storage Specialties (GearBoss Fixed and Portable Athletic Storage)

Section 10 51 16 - Wood Lockers (GearBoss Team Room Lockers)

Section 10 51 43 - Metal Grid Lockers (AirPro® Lockers)

Section 10 56 13 - Metal Grid Shelving (GearBoss Stationary Shelving)

Section 10 56 26 - Mobile Athletic Storage System (GearBoss High-Density Storage)

Section 11 61 13 - Acoustical Shells

Section 11 61 15 - Acoustical Clouds (Diva® Acoustical Shells)

Section 11 61 23 - Folding and Portable Stages (Trouper® Folding Stage Platforms and Seated Risers)

Section 11 61 23 - Folding and Portable Stages and Risers (Versalite® Staging and Seated Risers)

Section 11 61 25 - Orchestra Pit Filler (Strata Orchestra Pit Fillers)

Section 11 61 27 - Portable Seating Risers (Upper Deck® Audience Seating System)

Section 12 35 51 - Music Education Storage Casework

Section 12 35 61 - Theater Makeup Casework (Studio® and Backstage® Makeup Stations)

Section 12 61 00 - Fixed Audience Seating

Section 13 21 48 - Sound-Conditioned Rooms

SECTION 11 61 13 – ACOUSTICAL SHELLS

PART 1 - GENERAL

1.1SECTION INCLUDES

  1. Full stage acoustical shell system consisting of mobile acoustical shell towers and adjustable acoustical shell ceiling.

Specifier: If retaining Related Sections Article, coordinate and edit paragraphs below to correspond to project.

1.2RELATED SECTIONS

  1. Division 01 Section "Special Project Procedures for Music Education Facilities" for coordinating installation of related products.
  2. Division 11 Section "Stage Curtains" for rigging requirements for support of acoustical shells specified in this Section.
  3. Division 26 wiring sections for requirements for wiring of integral lighting units mounted in acoustical shell ceiling.

Specifier: If retaining References Article, retain references remaining in section following editing.

1.3REFERENCES

  1. American Society of Civil Engineers (ASCE):
  2. ASCE7 – Minimum Design Loads for Buildings and Other Structures.
  3. Architectural Woodwork Institute/Architectural Woodwork Manufacturers Association of Canada/ Woodwork Institute (AWI):
  4. Architectural Woodwork Standards, 2009.
  5. American Hardboard Association (AHA):
  6. AHA A135.4 - Basic Hardboard.
  7. ASTM International (ASTM):
  8. ASTM B 221 - Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes.
  9. ASTMC423 – Standard Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method.
  10. ASTM E 413 – Classification for Determination of Sound Transmission Class.
  11. National Electrical Manufacturers Association (NEMA):
  12. NEMALD3 – High Pressure Decorative Laminates.
  13. U.S. Green Building Council (USGBC):
  14. Leadership in Energy and Environmental Design (LEED).

1.4PERFORMANCE REQUIREMENTS

Specifier: STC performance of the acoustical panel used in acoustical shell system is a measurement of the efficiency of sound reflection provided by the acoustical shell. Value below indicates the performance of the Wenger panel.

  1. Acoustical Panel Sound Transmission: Provide acoustical shell system comprised of acoustical shell panels having the following sound transmission requirements:
  2. Sound Transmission Class (STC): 22 per ASTM E 413.

Specifier: Below relates to contractor requirement for securing architectural components to building structure. Verify seismic performance requirements of authorities having jurisdiction. Consult project structural engineer.

  1. Seismic Performance: Comply with ASCE7, "Minimum Design Loads for Buildings and Other Structures": Section9, "Earthquake Loads" based upon seismic design criteria indicated.

1.5ACTION SUBMITTALS

  1. Product Data: Manufacturer’s data sheets for acoustical shell system.
  2. Provide test results by certified independent testing laboratory indicating compliance with requirements of Performance Requirements article.
  3. Shop Drawings: Prepared by manufacturer. Include dimensioned plans and sections, and elevations showing acoustical shell system component sizes, arrangements, and details of each condition of installation. Show fabrication and installation details.
  4. Indicate coordination of acoustical shells with related overhead components, including structural elements, rigging, catwalks, lighting, ductwork, piping, and sprinklers.
  5. Illustrate storage configuration of mobile acoustical towers, indicating dimensions of space required and coordination with location and dimensions of storage area indicated on drawings.
  6. Specifier: Retain or add applicable paragraphs below for projects intended to be LEED-certified. Add additional requirements that apply. Verify credits required and availability of materials from manufacturer(s). Refer to USGBC LEED Reference Guide for detailed information.
  7. LEED Submittals:

Specifier: Paragraph below coordinates with LEED-NC requirements.

  1. Credit IEQ4.4: Manufacturer’s Signed Confirmation indicating that composite wood products and adhesives contain no urea formaldehyde.

Specifier: Paragraph below coordinates with LEED for Schools requirements.

  1. Credit IEQ 4.1: Documentation for composite wood products indicating compliance with testing and product requirements of California Department of Health Services' "Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers."
  1. Samples: For each color and finish for acoustical shell panels.
  2. Warranty: Submit sample meeting warranty requirements of this Section.

1.6CLOSEOUT SUBMITTALS

  1. Maintenance Data: Include manufacturer's cleaning instructions.

1.7QUALITY ASSURANCE

  1. Manufacturer Qualifications: Approved manufacturer listed in this section, with minimum [5] years experience in manufacture of acoustical shell components.
  2. Manufacturers Seeking Approval: Submit the following per requirements of Instructions to Bidders and Division 01 General Requirements:
  3. Product Data: Include third-party certified acoustical data and proposed layout for this project.
  4. Samples: Submit samples of finished acoustical shell panels and hinge.
  5. Warranty: Submit sample warranty.

Specifier: Select one of two paragraphs that follow. Edit subparagraphs under second paragraph below to correspond to project. Wenger recommends requiring contractor to coordinate procurement of these related items in order to meet design requirements and avoid installation conflicts:

  1. Source Limitations: Obtain acoustical shell system through one source from a single approved manufacturer.
  2. Source Limitations: Obtain the following products through one source from a single approved manufacturer[ in accordance with Division 01 Section "Special Project Procedures for Music Education Facilities"]:
  3. Sound control door assemblies.
  4. Acoustical room components.
  5. Acoustical Shells.
  6. Acoustical Clouds.
  7. Folding and portable stages and risers.
  8. Orchestra pit fillers.
  9. Music education casework.
  10. Sound Conditioned rooms.
  11. Coordination Conference: Prior to fabrication of acoustical shells, conduct conference at project site to verify coordination requirements with work of related trades. Review acoustical shell shop drawings in reference to rigging and to adjacent or integral fire protection, plumbing, HVAC, electrical power, lighting, communication, and structural and architectural features.
  12. Coordinate requirements for structural supports or pipe battens furnished under other sections and used to support acoustical shell system.

1.8DELIVERY, STORAGE, AND HANDLING

  1. Deliver, store, and handle acoustical shell components in accordance with component manufacturers' recommendations. Ship to jobsite only after roughing-in, painting work, and other related finish work has been completed and installation areas are ready to accept units and recommended temperature and humidity levels will be maintained during the remainder of construction.

1.9PROJECT CONDITIONS

  1. Field Measurements: Verify layout and the dimensions of other construction by field measurements before fabrication and indicate measurements on Shop Drawings.

1.10WARRANTY

Specifier: The "special warranty" is a warranty provided by the manufacturer to the building owner. The warranty terms below are available from Wenger Corp. Verify that other manufacturers listed or seeking approval furnish warranty meeting requirements. Durability is a key aspect of Wenger’s product value for Owners. The available warranty reflects Wenger’s high confidence in the performance of their products.

  1. Special Warranty: Manufacturer's written warranty indicating manufacturer’s intent to repair or replace acoustical shell systemcomponents that fail in materials or workmanship within [5] years from date of Substantial Completion. Failures are defined to include, but are not limited to, the following:
  2. Fracturing or breaking of unit components which results from normal wear and tear and normal use other than vandalism.
  3. Delamination or other failures of glue bond of components.
  4. Warping of components not resulting from leaks, flooding, or other uncontrolled moisture or humidity.
  5. Failure of unit to perform acoustically in accordance with manufacturer's published data.

PART 2 - PRODUCTS

2.1MANUFACTURERS

  1. Basis of Design: Acoustical shell system design is based upon product of the manufacturer below. Provide basis of design product.
  2. Wenger Corporation, Owatonna,MN; Telephone:(800)4WENGER (800-493-6437); Email: ; Website: Basis of design product: Legacy Classic Acoustical Shell.

2.2MATERIALS

  1. Steel Tube: ASTM A 501, hot formed steel tubing.
  2. Aluminum Extruded Bars, Profiles, and Tubes: ASTMB221 (ASTMB221M), 6063T alloy.

Specifier: For LEED-NC certified projects, retain option in paragraph below. For LEED for Schools projects, also retain subparagraph below referencing California DHS standard.

  1. Hardboard: AHAA135.4, Class1 Tempered, [urea formaldehyde free].
  2. Comply with requirements of California Department of Health Services' "Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers."
  3. Low-Pressure Decorative Laminate: NEMALD3, Grade VGP [, with urea formaldehyde-free adhesive].

2.3ACOUSTICAL SHELL PANELS

Specifier: Below describes standard Wenger Legacy Select acoustical shell panels. Select panel face. Edit to meet job requirements.

Wenger also provides complete custom design and fabrication of panels, tower, and ceiling system, including custom sizes and radii, acoustical densities and performance, custom accents, inlays, and faux finishes, and multiple storage options. Consult Wenger representative.

  1. Acoustical Shell Panels, General: Manufacturer's standard stressed-skin composite acoustical shell panels, with STC meeting performance requirements, designed to mix and blend sound and reflect a maximum range of audible frequencies to both audience and performers.
  2. Core: 3/4-inch- (19-mm-) thick honeycomb, resin-impregnated, bonded to frame and faces with permanent urethane adhesive. Contact cement adhesive does not meet the requirements of this specification.
  3. Face, Painted Panel: 0.10-inch- (2.5-mm-) thick hardboard stressed skin, material and finish as indicated, with no exposed fasteners.
  4. Back: 0.10-inch- (2.5-mm-) thick hardboard stressed skin, painted black.
  5. Panel Edge Frame: Extruded aluminum edge angle, along straight edges.

2.4STAGE ACOUSTICAL SHELL SYSTEM

  1. Mobile Acoustical Towers: Free-standing, self-supporting, movable towers for stage back and side walls. Towers consist of acoustical shell panels with rigid steel frame in nesting configuration. Counterweighted tower base, painted oyster, with non-marring casters.
  2. Size: 6-feet (1829-mm) wide.
  3. Height: 15-feet 2- inches (4623 mm).
  4. Canopy Angle: Canopy may be set at 45, 60, 75 and 90 degree angles. Canopy tool included to raise and lower canopy.
  5. Kicker Panel: Hinged to bottom of lower panel and folds flat for storage.
  6. Lift Mechanism: Pulley design lift assisted mechanism raises and lowers shell in just 6 turns with the used of a handle.
  7. Tower Panel Face Finish: Laminated Hardboard: [Match Architect’s sample].
  8. Tower Storage: Towers nest for maximum space utilization.
  9. Adjustable Acoustical Shell Ceiling: Acoustical shell ceiling consisting of adjustable-angle acoustical shell ceiling panels, suspended from stage rigging pipe batten, and stored in fly-loft in vertical position.
  10. Size and Configuration: [As indicated].
  11. Radius: 10-feet (3050-mm).
  12. Face Finish:
  13. Painted hardboard: [Match Architect's sample].
  14. Plastic laminate: [Color as selected by Architect from manufacturer’s available wood grain patterns].
  15. Panel Hinges: Self-lubricating ABS bushings and steel framework.

Specifier: Wenger acoustical shell ceilings may incorporate integrated lighting option. Consult your Wenger representative. Coordinate with electrical engineer and theater rigging consultant.

  1. Integrated Lighting: Manufacturer's standard UL-approved fixtures located as indicated.
  2. Exposed wire harness.

Specifier: Rigging and pipe battens are not furnished by Wenger. Coordinate with theater rigging consultant or with Division 05 metal fabrications section.

  1. Stage Rigging and Battens: Rigging and battens supporting acoustical shell ceiling are specified in Division 11 Section "Stage Curtains."
  2. Miscellaneous Supports: Battens, channels, and other miscellaneous supports are specified in Division 05 Section "Metal Fabrications."
  3. Electrical Wiring: Wiring of integral light fixtures is specified in Division 26 wiring sections.

2.5FINISHES

  1. Steel Framing: Powder coat painted finish, oyster.
  2. Low Pressure Thermfused Acoustical Shell Panel: Polyester decorative finishes.

PART 3 - EXECUTION

3.1EXAMINATION

  1. Examine jobsite conditions for compliance with requirements for installation tolerances, including required overhead clearances, and other existing conditions affecting installation and performance of acoustical shells. Proceed with unit installation upon correction of unsatisfactory conditions.

3.2ACOUSTICAL SHELL TOWER INSTALLATION

  1. Erect acoustical shell towers in location indicated in coordination with Owner's personnel to verify components are complete and operational.
  2. Move tower units to their storage location after approval of assembled acoustical shell.

3.3ACOUSTICAL SHELL CEILING INSTALLATION

  1. Install acoustical shell ceiling units plumb, level, and true, in accordance with manufacturer’s recommendations and approved submittals. Suspend from stage rigging using specified installation accessories.
  2. Verify setting of units in performance and storage positions.
  3. Verify adjustability of units.
  4. Install and test integral lighting.

3.4CLEANING

  1. Clean exposed surfaces of acoustical shells. Comply with manufacturer's written instructions for cleaning and touchup of minor finish damage.
  2. Repair or replace defective work as directed by Architect upon inspection.

3.5TRAINING AND DEMONSTRATION

  1. Train Owner's personnel to assemble, adjust, operate, and maintain acoustical shell towers and acoustical shell ceiling units.

END OF SECTION 11 61 13

WENGER CORP.11 61 13ACOUSTICAL SHELLS

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