American Seating Company
Grand Rapids
Architectural Specifications
SECTION 12610 STADIUM AND ARENA SEATING
PART 1: GENERAL
1.01
Section Includes:
A. Portable, fixed, and telescoping seating for theaters, auditoriums, lecture halls, stadiums,
arenas, gymnasiums, churches, schools and other facilities where multiple seating is
required.
1.02
Related Documents:
A. All applicable provisions of the Building and Contract Requirements, and Division 1 General Requirements shall govern the work under this section.
1.03
Description of Work:
A. Provide all labor, materials, necessary equipment and services to complete the installation of
the multiple seating, as indicated on the drawings, or as specified herein or both.
1.04
Performance:
A. Field performance shall be demonstrated by providing a list of not less than five (5)
installations of similar specifications that have been in service for a minimum period of five
(5) years.
B. Gray iron shall be of a quality and strength in accordance with ASTM A48-64 for Class 25
gray iron castings.
1.05
Submittals:
A. Complete Seat Plan: Submit drawings fully describing the seat plan developed from
architects prints of the building. Include details of all chairs, sizes, widths, anchorage and
accessories.
1.06
Quality Assurance:
A. All component parts of the product are to be made under direct control of the manufacturer.
Utilize testing and inspection procedures to assure uniform high quality component parts and
finished product.
PART 2: PRODUCT
2.01
Acceptable Manufacturer:
A. Manufacturer: American Seating Company
B. Product: 408 Outdoor Stadium Chair
2.02
Operation:
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408 Outdoor
American Seating Company
Grand Rapids
Architectural Specifications
A. The product has two independent fully operative hinge mechanisms for a consistent threequarter safely fold.
2.03
Construction:
A. Backs:
1. Backs are of one piece, doubled-walled HDPE plastic with UV inhibitors, molded in a
compound curve for comfort, lumbar support and styling. Thickness is approximately 11/4" at top and bottom on center line. Welded areas outline center panel. Back height
are approximately 19" and width shall be 3/4" less than chair size.
2. Backs are attached to standards by means of four 1/4" diameter anodized aluminum
step bolts. Bolts have recessed square in head to assist in installing. Attachment bolt
shall pass through back panel and cast iron standard, and secured by nut.
3. Backs are provided with a recess for 2-1/16" x 2-15/16" aluminum number plates, only
when specified.
B. Seat:
1. Seats are of one piece, double walled HDPE plastic with UV inhibitors, molded to a 34"
radius from side to side with form fitting ergonomic curve from front and rear on center
line. Welded areas outline center panel. Seat to be molded to match appearance of
back. Seats consist of a minimum of 20% post consumer recycled content.
2. Seat length 17-3/4" and width 2-1/2" less than the chair.
3. Seats attach to seat arms by means of four 1/4" diameter anodized aluminum step bolts.
The four attaching bolts will pass through the seats and be secured with and nut and flat
washer.
C. Standards:
1. End standards, middle standards and seat arms, are ASTM A48 class 25 or greater
strength grey iron. Standards shall be cleaned by sandblasting or rattling and surfaces
shall be smooth of sharp projections, free from pits, blowholes and fins. Standards shall
have integrally cast 1 ½” wide armrest.
2. Back supporting member of standards shall be designed with curved shape in vertical
plane to comfortably fit back of chair occupant. It shall provide for average back pitch of
not less than 16 degrees, as measured from vertical. Back supporting member shall be
“U” shaped to provide proper protection for ends of back, and shall further provide for
attachment of backs. Standards must be designed for proper relationship between
chairs and risers, regardless of varying heights of risers. Proper back pitch and seat
height shall be maintained throughout installation, regardless of riser height. Standard
must be designed so rear edge seat will clear riser in folding, and that corner of platform
will not interfere with chair occupant.
3. One portion of seat hinge mechanism shall be cast integrally with standard to provide
constant seat height in all rows.
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408 Outdoor
American Seating Company
Grand Rapids
Architectural Specifications
4. Types:
a. Riser: Front member of lower portion of standard shall be designed in curved shape
to provide clearance for sweeping tread beneath chair. Rear member of lower
portion must be integral, and designed for direct attachment to riser. Rear flange of
standard shall be securely and immovably attached to riser at not less than two
points. The rear flange shall be stepped and there is no projection of any portion of
a riser mount standard onto the tread below.
b. Floor Type: Standards shall be cast in one of five inclines to best fit floor incline and
provide the hinge point at a height to maintain proper seat height. Floor pad shall
provide two locations, fore and aft, for selecting a front and rear attachment point to
concrete, aluminum or steel deck floors. For wood floors all four locations must be
used.
D. Seat Arms:
1. Seat arms are ASTM A48 for Class 25 gray cast iron.
2. Seat arm is cast in a tapering inverted “L” shape. The top leg of the seat arms must fit
the underside of the seat shape. Each arm will provide attachment of seats with not less
than two bolts per arm.
3. The inner half of the chair hinge mechanism including bearing pocket, stops, and fold
location tab are integrally cast with the seat arm.
E. Hinges:
1. Hinges shall consist of a cast iron pivot securely fastened to the standards by a 5/16”
SAE grade 5 through bolt. Rotation of seat on hinge pivot shall be on a stainless steel
bearing. Both “up” and “down” stops on seat shall be cushioned with Neoprene rubber
to reduce noise.
2. Seat hinge shall automatically fold to a 3/4 uniform position at all times without
adjustment. It shall fold and additional 2 ½” to 100% to provide additional clearance.
F. Seating Lifting Mechanism:
1. Each chair shall be equipped with two seat lifting devices attached to the sides of seat
arm castings, which shall lift the seat to a folded position without assistance.
Mechanisms are located at the side face of the chair standards to not be a hazard to
occupants or their clothing.
2. The mechanism shall consist of cast iron and plastic housings enclosing a wound spring
with seven (7) active coils. Spring shall be formed of 0.120” oil tempered spring wire
coated with Teflon. The spring is neither non-handed nor directional allowing use in
either the left or right mechanism.
3. Seat lifting device shall be preloaded with sufficient torque to raise seat from any point in
rotation.
4. Lifting device shall be in accordance with ASTM F851-87 Test Method for Self-Rising
Seat Mechanism and be designed and installed to prevent squeaks or excessive noise
in operation.
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Toll Free: 800.748.0268
03 / 13
408 Outdoor
American Seating Company
Grand Rapids
Architectural Specifications
G. Hardware:
1. Step bolts and nuts for attaching backs to standards shall be clear anodized tempered
aluminum, with bolt heads burnished. Nuts used with aluminum bolts are case
hardened steel with an aluminized coating to resist galvanic reaction.
2. All other hardware used in chair and accessory assemblies are treated with rustresisting coatings.
2.04
Finish:
A. Molded Plastic: All seats and backs shall be made from high density molded polyethylene
plastic 1/8" target thick with minimum thickness 0.075” at any point. The blow molded
polyethylene seats and backs consisting in natural resin including premium colorant,
ultraviolet inhibitors and a color protection additive package. Bidders shall supply a certified
test report indicating compliance with ASTM 2565 test of 6,000 hours exposure to a xenon
arc lamp meeting Delta E CIE <5.
B. Metal Parts: All exposed cast iron shall be cleaned and finished using the following
procedure (steps 1. and 2. are for outdoor applications):
1. Pre-E-coat cleaning in a 9-stage phosphate free bonderizing process
st
a. 1 stage: alkaline clean spray F.
nd
b. 2 stage: alkaline clean immersion.
rd
c. 3 stage: alkaline clean spray.
th
d. 4 stage: water spray.
e. 5th stage: titanium activator spray.
th
f. 6 stage: zirconium immersion.
th
g. 7 stage: deionized water rinse.
th
h. 8 stage: seal spray.
th
i. 9 stage: deionized water rinse.
2. E-coat, water born two part epoxy paint in an electro-deposition system.
a. All parts shall have a film thickness (D.F.T.) of 0.4 min. to 1.0 max. mils.
b. All parts shall receive a three stage permeate rinse.
c. Parts shall be baked in a gas fired convection oven at appropriate temperature.
d. Cured e-coat must have a pencil hardness of 2H min.
3. Pre-powder coat cleaning in a 7-stage bonderizing process
st
a. 1 stage: acid clean.
nd
b. 2 stage: water rinse.
rd
c. 3 stage: zirconium immersion, 40-70 Mg/F coating weight
th
d. 4 stage: deionized water rinse.
th
e. 5 stage: seal spray.
th
f. 6 stage: deionized water rinse.
th
g. 7 stage: deionized water rinse.
h. all parts pass thru a dry-off oven.
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408 Outdoor
American Seating Company
Grand Rapids
Architectural Specifications
4. Finishing of parts in an electrostatic system.
a. All parts shall be coated with an exterior grade polyester hybrid TGIC powder coat.
b. Dry film thickness of powder coat 1.8 to 3.0 mils.
c. Gloss level to be 90±5 when measured in accordance with ASTM D563 @ 60
degrees.
d. Cured hardness to be 2H minimum (no indentation) per ASTM D3363.
e. When exposed to humidity per ASTM D2247 there shall be no loss of adhesion or
blistering in the coating after 1000 hours.
f. There shall be no rust after 1000 hours of salt spray exposure in accordance with
ASTM B117 and a maximum of 1/8" rust creep from a scribe line in accordance with
ASTM D1654.
g. Color change shall be delta E CIE of 1.5 or less both before and after testing per
ASTM G154 for 1000 hours exposure.
C.
2.05
Metal Parts: All exposed steel parts shall be cleaned and powder coated using the
Following procedure:
1. Cleaning in a 7-stage phosphate free bonderizing process
a. 1st stage: acid clean.
b. 2nd stage: water rinse.
c. 3rd stage: zirconium immersion, 40-70 Mg/F coating weight
d. 4th stage: water rinse
e. 5th stage: seal spray.
f. 6th stage: deionized water rinse
g. 7th stage: Duplex D.I. System
h. all parts pass thru a dry-off oven.
2. Finishing of parts in an electrostatic system.
a. All parts shall be coated with a thermosetting epoxy powder.
b. All parts shall have an average dry film thickness (D.F.T.) of 2.5 to 3.0 mils.
c. Parts shall be baked in a gas fired convection oven at appropriate temperature.
b. Cured powder coat must pass the 2H pencil hardness test.
OPTIONS
A. Cup Holders: The cup holder is made from injection molded HDPE with UV inhibitors.
The cup holder is capable of hold cups from 8 oz. through 32 oz. and accepting an
advertising or logo label along its vertical surface. The cup holder position can be
rear mounted between the backs of two chairs or front mounted at the front of the
arm rest.
B. ADA Swing Arm: The ADA arm is a cast iron swing arm which raises from its normal
position 70 degrees to align with the chair back and allowing easy access to the
chair. The arm swivels on a self lubricating bushing to maintain smooth consistent
Please Contact Your AMERICAN SEATING Representative For More Information
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Internet: www.americanseating.com
Toll Free: 800.748.0268
03 / 13
408 Outdoor
American Seating Company
Grand Rapids
Architectural Specifications
operation. The arm must support a 200 pound horizontal load and 250 pound vertical
load without damage or adverse effect to its operation.
C. Row and Seat Identification Plates: Plates are clear anodized aluminum of .0.25 inch
thickness. Size of seat identification plate is 1 11/16” by 7/8”. Seat numbers are
36-point, Arial, Helvetica or New Times Roman font style. Size of row
identification plate is 2 13/16” by 1 ¾”. The row numbers/letters are 125 point,
Arial, Helvetica or New Times Roman font style. Numbers shall be recessed and
filled with black baked enamel. Plates provided with adhesive backing or two (2)
holes for attachment to a recessed area in front edge of the seat pan with two (2)
tamper proof fasteners.
D.
Standards: Cast iron aisle standards provide a trapezoid area 5.12” bottom width,
8.25” top width by 10” high capable of receiving raised or filigree logo designs cast
as an integral part of the aisle standard.
PART 3: INSTALLATION, EXECUTION, AND WORKMANSHIP
3.01
Preparation of site shall be by the General Contractor. Any deviation of site conditions
contrary to approved shop drawings shall be called to the attention of the architect.
3.02
Delivery to the job site shall be coordinated by the general contractor. Proper storage of
the product before installation and continued protection during and after the installation
shall be the responsibility of the general contractor.
3.03
Installation shall be by an authorized factory trained installer, or by a capable
superintendent under whose direction the installation is to be performed in a manner
satisfactory to the architect, owner or both.
3.04
Installation will be in accordance to the approved seat plan and drawings.
3.05
The complete installation of the product as called for, and detailed on the drawings, shall
be provided in strict accordance with the drawings and manufacturer’s standard
specification, instructions and recommendations.
END OF SECTION
Please Contact Your AMERICAN SEATING Representative For More Information
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Internet: www.americanseating.com
Toll Free: 800.748.0268
03 / 13
408 Outdoor