Specifications for Interkal Aura (solid or slat) Stadium Chair general scope

Specifications for

Interkal Aura (solid or slat) Stadium Chair
1. GENERAL SCOPE
01. Interkal Aura Stadium Chairs, Solid or Slat, shown in architect’s plans and specifications as manufactured by Interkal, Kalamazoo, MI, or as approved by the architect.
2. DESCRIPTION OF SYSTEM
01. The Aura shall be available in 19” through 23” widths to accommodate capacity requirements. The Aura shall operate freely and quietly and provide for comfort and safety of the occupant. The chairs shall use blow molded, high-density polyethylene seats and backs with U.V. inhibitors and high strength die cast aluminum stanchions for structural integrity and rust free usage.
3. QUALITY ASSURANCE
01. Deviation - It shall be the responsibility of the bidder to furnish with his bid a list clarifying any and all deviations from these specifications, written or implied, in order that a fair and proper evaluation be made. Those bidders not submitting a list of deviations will be presumed to have bid as specified.
02. Limited Guarantee - The manufacturer shall guarantee all work performed under these specifications to be free from defects for a period of one year.
03. Product Improvements - Seating provided shall incorporate manufacturer’s current design improvements at time of shipment.
4. DESIGN CRITERIA
01. In the mounted position the chairs shall be designed to withstand, without damage to components, the forces from the following:
A. Swinging Impact Text of two forty pound sandbags impacting the chair back a total of 50,000 times equally divided between distances of 6”, 8”, 10”, and 12”.
B. Vertical Drop Test of a forty pound sandbag dropped a total of 50,000 times on the seat equally divided between distances of 6”, 8”, 10”, and 12”.
C. Oscillating Test - The seat shall be opened mechanically and released to oscillate to the 3/4 fold position 420,000 times without failure in accordance with

ASTM 851-87.

D. 600 pounds evenly distributed on the seat assembly.
E. 350 pounds evenly distributed to the front and then to the back of the chair back.
F. Arm Load Test - Vertical static load test of 250 pounds and lateral static force

of 250 pounds.

02. Chair materials, finish, strength and operating test results to be certified by an

independent testing laboratory.

5. MATERIALS/FABRICATION
01. Seats and Backs:
A. Seat and back shall be one piece, double wall, blow molded, high density polyethylene plastic with a nominal thickness of .125”.
B. Seat and back surfaces shall be free of all external reinforcement ribs and shall be anatomically designed with lightly textured surfaces radii used vertically and horizontally for occupant comfort and safety.
C. Material shall be color pigmented with manufacturer’s standard colors, which shall include ultra-violet inhibitors for indoor or outdoor applications.
02. Seat and Back Supports:
A. Seat shall be attached to pivot arms with truss head screws attached to threaded inserts.
B. Back shall be attached through holes cast integrally in the stanchions with two truss head screws attached to threaded inserts.
C. Insert nuts shall be molded into the plastic seat and back to achieve superior torque and pull out strength.
D. There shall be no visible fastening hardware on the seating surface of the seat or back to detract aesthetically or to encumber the occupant with tearing of clothing or pinching hazards.
E. Chairs with exposed attachment hardware on the seating surfaces shall be unacceptable.
03. Seat Mounting/Hinge:
A. The seat shall oscillate on Nylon bushings pivoting on a cross shaft for extended maintenance free operation.
B. Cross shaft shall structurally interconnect both chair standards eliminating the plastic seat as the structural member between stanchions.
C. The self-rising torsion spring shall be attached to the cross shaft and completely enclosed within the seat assembly.
D. Unoccupied seat shall rest in the 3/4 fold position and accommodate a 110% fold position for spectator passage within a row.
E. The chair envelope in the unoccupied position shall not exceed 14-9/16”
04. Stanchions:
A. Stanchions shall be die cast aluminum providing for rust free standards and arm rests that are cast as an integral part of the stanchions.
B. Riser mounted stanchions shall accommodate a minimum of 8” to a maximum of 24” rise without additional attachment plates and floor mounted standards shall accommodate a level floor.
C. Seat cross shaft attachment brackets shall be cast integrally into the stanchions.
D. Each stanchion shall be designed to maintain proper and constant seat height and back pitch regardless of riser height.
E. Stanchions shall be designed in such a manner that all integral protrusions shall shed liquids.
6. FINISH
01. Finish (Powder):
A. All metal components shall be chemically cleaned.
B. Finish shall be a polyester powder coating, electrostatically applied and capable of withstanding 500 hours of U.V., 500 hours salt spray and 500 hours of humidity without visible deterioration.
C. Acrylic or enamel coatings shall not be acceptable.
D. Colors shall be selected from manufacturer’s standard colors.
7. ACCESSORIES
01. Seat/Row Numbers
A. Anodized aluminum plates 3” x 1-3/4” x .025” thick shall be attached with rivets.
B. Numbers/letters shall be 1” high and finished in weather resistant black and shall be fitted in a vandal resistant recessed pocket and easily identified when the seat is in the unoccupied condition.

02. Seat Pan Numbers (Optional)

A. Anodized aluminum seat pan number plates 2-1/4” x 1” x .025” thick

shall be affixed with rivets.

B. Numbers/letters shall be .75” high and finished in a weather resistant black and shall be fitted in a vandal resistant recessed pocket and easily identified when the seat is in the unoccupied condition.

3. 
   Cup holders
   

A. One piece cup holders to be mounted at rear of seat at the upper back attachment

B. Available in 15 standard colors
8. EXECUTION
01. Inspection

A. Area to receive Stadium Chairs must be free of obstructions that interfere with the installation.

B. Installation shall not begin until conditions are satisfactory.
02. Installation
A. Stadium Chairs to be installed in accordance with manufacturer’s instructions and approved submittal drawings.
B. All Stadium chairs to be adjusted to smooth and proper operation.