S02 - Salient Charateristics - Skyfold.pdf

Specifications

Skyfold Zenith® Automatic Vertically Retractable Acoustic Walls by Skyfold Zenith® 48

1. General Skyfold Zenith 48 vertical folding wall in premium Xorel fabric shall be approved by VA contracting officer representative (COR) 3 each 24’L X 9’H, located on the 2nd,3rd and 4th floor 2 each 23’L X 9’H, located on the 1st floor

2. System Description

Automatic Vertically Retractable Acoustical Wall, shall refer specifically to acoustical partitions that, when in the down position (closed) are hard, rigid, f lat, plumb walls, made of a grid of rectangular acoustical panels, and when are lif ted (opened), fold upward (vertically) without the use of any manual labor, into a pocket in the ceiling, between roof joists, or up between built in bulkheads. In the down (closed) position, the operable wall shall be comprised of two vertical planes of acoustical panels, separated by an acoustical air space.

2a) Standard Drive System:

The motor drive assembly is mounted directly above the center line of the operable wall. Minimum wall length without modifying our system is 9’-0” (2745mm). Used for walls up to 12’-0” (3660mm) finished ceiling heights:

The operable wall shall be opened and closed, in the standard scenario, using two push button switches wired in series with power controlled by a single, three position key switches, Or, in the optional scenario, using two touch screen operator stations. In the standard, push button scenario, turning the key f rom the “off” position shall cause the wall to move in the designated direction “up” or “down” once both push buttons are depressed.

In the optional, touch screen scenario, pressing and holding the up or down directional arrow symbol on one touch screen while simultaneously pressing and holding the button symbol on the second screen shall cause the wall to move in the selected direction. In both scenarios, when hand pressure is removed, the wall shall immediately stop. The operable wall shall stop in a quick and positive fashion without coasting. As a normal part of the operation, it shall be possible to partially open (or close) the wall, stop it and then reverse the operation. There shall be two (2) switches per operable wall, located on opposite sides of the wall at opposite ends of the wall, wired in series. In the standard condition, one switch shall be equipped with an LED that f lashes fault codes in case of a failure with the electrical system. In the optional, touch screen scenario, the screens will display faults in case of a failure with the electrical system.

From a fully open position, the operable wall shall be able to go through its entire cycle of closing and/or opening without any manual intervention. When the operable wall is being lowered (closed) it shall come automatically to rest once it has reached the fully down (closed) position. When the operable wall is being lifted (opened) it shall come automatically to rest once it has reached the fully up (open) position. The operable wall shall open and close at an average speed of approximately 5 to 10 vertical feet per minute (1.5 to 3 meters per minute).

The operable wall shall automatically and acoustically seal against the f loor without the need for any manual intervention. The f loor seals shall leave a joint between the floor and the bottom acoustical panels of not more than approximately 2” (51 mm). The operable wall shall automatically and acoustically seal against the two end walls without the need for any manual intervention. The end seals shall act in such a way as not to come into contact with the end walls while the operable wall is in motion. The end seals shall leave a joint between the acoustical panels and the end walls of no more than approximately 1” (25 mm). Seals that rub or brush against the end walls are not acceptable. Once the operable wall reaches the full down position, the end seals shall activate automatically. The key switch does not need to be held during the deployment of the end seals.

The operable wall shall automatically and acoustically seal against the ceiling without any manual intervention.

The top seals shall leave a joint between the top acoustical panels and the ceiling of the pocket of not more than approximately 2” (51 mm).

When the operable wall is being lowered (closed), it shall stop if the leading (bottom) edge comes into firm contact with any object between it and the floor.

The operable wall will then automatically reverse its direction and ascend for approximately 3 seconds to clear the object. The regular operation of the operable wall can resume once the obstruction has been removed.

The operable wall shall be visibly flat and rigid in the down (closed) position.

There shall be no exposed hinges, brackets, screws, and no part of the mechanical system shall be visible when the operable wall is in the down (closed) position.

All of the panel edges shall be right angled, with a minimum radius not more than 1/16” (1.6 mm).

All of the panels shall be rectangular, nominally of the same size.

Joints between panel, vertical and horizontal, shall be no more than approximately ½” (12.7 mm) wide.

The operable wall shall stack in the up (open) position into a space no greater than 65” (1650mm) wide. The operable wall shall have a stacking height ratio in the range of 1:5 to 1:10, depending on the height of the wall.

The operable wall shall not weigh more than the following:

Skyfold Zenith® 48 ~6.0 lbs per ft² (29.3 kg per m²)

The preceding weights do not include the motor drive or the architectural finish on the acoustical panels and are based on 24’-0” long x 12’-0” high (7315mm x 3660mm) operable wall.

A completely functioning operable wall, tested in full accordance and compliance with ASTM E90 (ISO 140-3), shall achieve, from an independent laboratory, a Sound Transmission Class (STC) rating (Rw value) of not less than the following:

Skyfold Zenith® 48: System STC 48 (Rw 47), Panel Construction STC 57 (Rw 56)

The operable wall shall be designed to have a design life of at least 10,000 complete closed to opened to closed cycles.

2b) Quality Assurance

The products herein specified established the standard of quality for the operable wall based on the following Skyfold Zenith® Automatic Vertically Retractable Acoustic Walls by Skyfold Inc.

Skyfold Zenith® 48 System STC 48 (Rw 47), Panel Construction STC 57 (Rw 56)

Independent test reports which meet the requirements and design specified herein must be submitted to obtain approval.

The operable wall must be manufactured by a certified ISO-9001-2008 company or an equivalent quality control system.

3. Warranty Requirements Basic Warranty: The operable wall shall be warranted f ree from defects in material and workmanship for a period of five (5) years

4. Technical Specification and Code Requirements References ASTM E90, Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions. Annex A1.15 Operable (Folding or Sliding Walls) Annex A1.15.3 Operation – “The specimen shall not be designated an operable wall unless it opens and closes in a normal manner. It shall be fully opened and closed at least f ive times af ter installation is completed and tested without further adjustments.”

ASTM E413, Classification for Rating Sound Insulation.

ASTM E557, Standard Practice for Architectural Application and Insulation of Operable Partitions.

ISO 354, Measurement of Sound Absorption ISO 140-3, Measurement of Airborne Sound Insulation ASTM C423, Measurement of Sound Absorption

5. Materials

Acoustical panels shall be faced with steel that is compatible with a wide variety of architectural f inishes Premium Fabric, Xorel Acoustical panels, together with all of the sound insulation, shall be, as much as possible, made of non-combustible or fire-treated materials.

Acoustical panels shall be fabricated to be as stiff as possible in order to satisfy the rigid criteria when the operable wall is down (closed) and to ensure that there is no interference between panels when the wall is in motion.

Acoustical panels shall be architecturally flat with no bowing, oil canning, warping, waviness or any other surface deformation and discontinuity.

Acoustical panels shall have the finish of VA contracting officer representative (COR) choice, provided that the f inish has been approved by the operable wall manufacturer to ensure compatibility with the wall panels.

The following criteria must be met:

Maximum weight of material: 0.111 lbs/ft² (0.542 kg/m²) Maximum thickness of material: 1/8” (3mm) No brittle materials. .Finishes are railroaded onto the panels, applied horizontally along the panel length.

Skyfold Zenith® 48 f inishes are limited to Skyfold’s standard Premium Fabric, Xorel Only acoustically transparent fabric finish for Skyfold Zenith® NRC Acoustical panels shall meet the following STC ratings in accordance with ASTM E90 (ISO 140-3) specification as reported by an independent laboratory.

Skyfold Product Panel Construction

Fully Automatic

Operable wall

Skyfold Zenith® 48 57 STC (56 Rw) 48 STC (47 Rw)

6. Folding Mechanism

The hanging, folding and extension mechanism shall be, as much as possible, made f rom structural grade aluminum extrusions and structural shapes, in order to minimize the weight of the system. All wear surfaces, such as bushings, spacers, pins, discs, bearings, and sleeves shall be designed to function quietly and with minimum wear, over the 10,000-cycle design life of the operable wall.

The hangers, which fasten the lif ting mechanism to the support steel, shall be fabricated f rom steel and shall be welded or bolted to the support steel supplied by others.

7. Motor Drive

The motor drive shall be sized properly so that it can open and close the operable wall ef fectively over the 10,000-cycle design life of the wall, at the minimum design speed.

The folding mechanism shall be designed to function as smoothly, quietly and safely as possible. Wherever possible, ball bearings shall be used instead of bushings and wear surfaces. In no circumstance shall chain or belt drive systems be acceptable.

There shall be a wire rope cable for every set of folding mechanism. This cable shall be of 6 x 31 construction aircraf t cable and shall be made of galvanized steel. The diameter of the cables shall be sized so that they shall be able to hold the entire weight of the operable wall, with the appropriate safety factor.The cable wraps on yoyo drums with 2 safety wraps and multiple layers of cable.

The line shaf t, sized to deliver the required torque with minimum deflection, shall support and rotate the cable drums. Flange bearings shall be used for the drive system, located immediately on both sides of the drum assembly.

The motor drive shall be sized to deliver sufficient amount of torque to safely and effectively raise and lower the operable wall over its design life.

The motor drive shall use the latest in industry standards in thermal protection, overload protection, quick acting fuses, etc., in order to ensure the safety and reliability of the system.

8. Safety Equipment

The operable wall shall employ an electromagnetic type of brake which shall activate firmly, without hesitation, when power is lost to the system.

This brake shall have a minimum retarding torque rating equal to 200% of the motor drive’s full load torque.

The drive system shall be equipped with a manual override and a brake release lever.

The operable wall shall employ a dynamic brake, distinct and separate f rom the brake, in order to lower the operable wall at a controlled speed of no more than approximately 150% of the normal down speed, in the case of a catastrophic failure in the motor drive’s power train.

Alternately, the operable wall shall employ a brake, distinct and separate f rom the brake in, in order to completely halt the downward motion of the wall in the case of a catastrophic failure in the power train.

The operable wall shall employ electrical or other limit switches in order to stop the wall at its up and down travel limits. The operable wall shall employ an over torque detector in order to sense a jam in the system and to act as an over travel limit in the up direction should the primary limit switch fail to act. This over torque sensor shall be mechanical, using the motor’s torque arm in its over torque detection.

The entire length of the bottom edge of the operable wall shall be equipped with a continuous pressure sensing strip which shall cut power to the motor drive and shall activate the brake outlined, if the sensing edge comes in f irm contact with an object, before the operable wall is in the full down (closed) position.

The operable wall will automatically reverse direction and ascend for approximately 3 seconds to clear the obstruction. The power shall remain cut to the motor drive until the switches have been released. The operation of the operable wall can resume once the obstruction is removed.

9. Electrical

The operable wall shall be equipped for a three-phase power supply to the electrical control box.

Standard electrical control box will be NEMA 1.

Low voltage wiring (by others). 18-gauge wiring from the switches to the control box.

Switches (standard): Two (2) push button switches wired in series with power controlled by a single, three position key switch. One push button switch will be equipped with an LED that f lashes fault codes in case of an electrical system failure.

Touch Screen Operator Stations (optional): Two (2), 4.3” resistive LCD touch screens, wired in series with multilingual capabilities and 4-digit adjustable user pin. The screens will display faults in case of a failure with the electrical system.

10. Submittals

Submit manufacturers’ technical data for each type of operable wall specified herein.

Submit shop drawings showing complete layout of operable wall system based on f ield verif ied dimensions.

The drawings shall include dimensional relationship to adjoining work. Include details indicating materials, f inishes, tolerances, and methods of attachment to building steel and electrical requirements.

Submit certified test reports evidencing compliance to acoustical STC (Rw)

Stamped Drawings and Structural Calculations Provide a fully engineered and stamped drawings and structural calculations by a licensed engineer for the mounting and installation of the system.

11. Execution

11.1 Inspection

Inspect the relevant aspects of the site such as the evenness of the f loor, walls, structural steel, etc., and ensure that these are within the tolerances stated in this specification.

Conf irm in writing to the General Contractor or contract manager any deviations from these tolerances. Do not proceed until these conditions are made good.Carry out all appropriate f ield measurements before manufacturing any components or assemblies.

11.2 Installation

The operable wall supplier shall not deliver or install this product until the General Contractor can ensure in writing safe storage and protection for the operable wall for the duration of the project.

11.3 Adjusting and Cleaning

Adjust and fine-tune the operable walls to ensure that all seals are operating and sealing properly and that the operable walls are in correct and smooth operation.

Clean up any dirt, oil, grime, etc., that may have found its way onto the acoustical panels. Leave the operable wall in a state of architectural cleanliness.

11.4. Spare Parts

Ensure the manufacturer has ample stock available for repairs.

12. Onsite Training

Provide onsite training to the users Provide in-person demonstration for the operation of the system Provide in-person demonstration for the maintenance and troubleshoot of the system Provide training literature and technical support contact information