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SECTION 13125
ANGLE FRAME BLEACHERS
PART 1 - GENERAL
1.01 SECTION INCLUDES
A. Design and fabrication of angle frame bleachers
1.02 QUALITY ASSURANCE
A. Manufacturer: National Recreation Systems, Inc.
5120 Investment Drive Fort Wayne, In 46808
(888) 568-9064 email
sales@bleachers.net
B. Manufacturer Qualifications: Manufacturer must
have a minimum of ten years experience in the
design and
manufacture of bleachers.
C. Welders must conform to AWS standards.
D. Codes and Standards: International Building Code 2009
Edition
and ICC 300-2007
1.03 WARRANTY
A. Warranty shall guarantee bleachers to be free from defect in
materials and workmanship for a
period of 1 year under
normal use. Warranty period shall begin on date of completion
for projects
installed by manufacturer, or its subcontractors.
B. Anodized finish of plank extrusions shall be covered by a
5 year warranty against loss of structural
strength or finish
deterioration due to exposure to weather conditions or UV
rays. Discoloration of
mill finish aluminum due to galvanic
reaction not covered.
PART 2 – PRODUCTS
2.01 ACCEPTABLE MANUFACTURER
A. National Recreation Systems, Inc. (888) 568-9064
5120 Investment Drive, Fort Wayne, In 46808
or email sales@bleaches.net
2.02 DESIGN
A. Applicable Codes:
International Building Code (IBC), 2009 Edition and ICC 300-
2007
B. Design Loads:
1. Live Loads: Uniform loading - Structure = 100 psf
Uniform loading - Seat and Tread plank = 120 plf
2. Sway Loads: Perpendicular to seats = 10 plf
Parallel to seats = 24 plf
3. Guardrail Loads: Uniform load = 50 plf applied in any
direction. Concentrated load = 200 pounds
applied in any
direction
4. Wind Loads: per local building code requirements
2.03 ANGLE FRAME BLEACHERS
A. Quantity and Size: Shall consist of ___ unit(s)
___ rows high x ___ ' - ___' long.
Net seating capacity per unit ___+___HC
(excluding aisles, based on 18" per seat).
B. Framework: Prefabricated aluminum angle or galvanized steel
angle at max. 6' spacing joined by means
of aluminum angle
cross bracing.
C. Shop connections: Welded to meet AWS standards
D. Joint Sleeve Assembly: Internal splices, where required shall
be two per joint and shall penetrate the joint
a minimum of 8 in
each direction and be riveted at one end only to allow for
contraction and expansion.
E. Rise and Run Dimensions:
1. Standard rise/run = 8" rise/ 24" run .
Seat height 17” above tread.
2. Low rise = 6” rise / 24” run.
Seat Height: Row 1= 10-1/2”-,
Row 2= 12-1/2” , Rows 3-5 = 14-1/2”
3. Other rise/run dimensions available
(10”-12” -14” rise/ 24”- 30”- 36” run)
F. Seats: Nominal 2' x 10' , or 2 x 12” (Low Rise) anodized
aluminum with anodized end caps.
G. Treads: (1) Nominal 2" x 10" or optional (2) 2"x 10" mill finish
aluminum with anodized end caps
H. Risers: Nominal (1) 1” x 6” mill finish aluminum with end caps
on all rows except top row, (2) 1” x 6” mill
finish aluminum on top row.
(1” x 4” , 1” x 8” also available)
I. Aisles: Aisle footboards shall be of aluminum alloy 6063-T6 and be
of mill finish with black anodized
contrasting aisle nosing. Three
aisle stiffener angles shall be used to strengthen the aisle step.
There shall be ___ aisle(s) ___” wide.
J. Aisle Handrail: Anodized aluminum pipe with intermediate rail.
K. Entry Stairs:___ sets(s) of entry stairs, ___” in height.
Guardrails and handrails shall be provided as required.
L. Front Walkway: ___” in height and 63” in clear width, to consist of
(7)- 2"x 10" mill finish aluminum planks.
(other widths available)
Standard elevation = 36”
(optional elevations include 18”,24”,30”,42”,48”,54”,60”)
M. Guardrail: Rails shall be anodized aluminum tube with end plugs
and elbows where required. All Rails shall
be secured to support
with galvanized fasteners. Top rails at sides, rear and front shall
be 42” above the
leading edge of seat or walking surfaces. Rear
rail support members shall be aluminum channel, side and
front
rail supports shall be aluminum angle.
1. Chainlink System: Fencing shall consist of 9 gauge, 2" mesh
galvanized chainlink fabric, heavy duty tension
bands, tension
bars, brace bands, combo rail end caps, and wire ties.
2. Vertical Picket System: Aluminum pipe and bar anodized after
fabrication & attached to supports with
galvanized fasteners.
N. Handicap Accessibility (where applicable) shall be provided as
required by the
code listed above.
2.04 MATERIALS / FINISHES
A. Framework:
1. Aluminum: Structural fabrication with aluminum alloy 6061-T6
mill finish. Each frame shall be
unit-welded, using metal inert
gas method, under guidelines by the American Welding Society.
2. Galvanized Steel: ASTM A529 GR50 . All
steel is hot dipped galvanized after fabrication to
ASTM A 123
specifications.
3. All cross bracing and horizontal bracing shall be aluminum
angle 6061-T6 mill finish.
B. Extruded Aluminum:
1. Seat planks: Aluminum alloy 6063-T6, clear anodized 204R1,
AA-M10C22A31 Class II with a wall
thickness nominally .078”
for impact and deformation resistance.
2. Tread and Riser Planks: Aluminum alloy 6063-T6, mill finish with
a wall thickness nominally .078” for
impact and deformation
resistance.
3. Guardrail Pipe: 1-5/8" OD schedule 40 aluminum alloy 6061-T6,
clear anodized 204R1,
AA-M10C22A31, Class II.
4. Handrail Pipe: 1-7/8" OD schedule 40 aluminum alloy 6105-T1,
clear
anodized 204R1, AA-M10C22A31, Class II.
C. Accessories:
1. Channel End Caps: Aluminum alloy 6063-T6, clear anodized
204R1,AA-M10C22A31, Class II.
2. Hardware: Bolts and Nuts shall be hot dipped galvanized.
3. Hold Down Clip Assembly: Aluminum
alloy 6063-T6 mill finish.
4. Joint Sleeve Assembly: Aluminum alloy 6061-T6, mill finish.
PART 3 – EXECUTION
3.01 INSTALLATION
A. Install bleacher unit in accordance with manufacturer written
instructions and shop
drawings.
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888-568-9064
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