BLEACHERS & BENCHES

 

 

Architectural Spec's

 

 

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Architectural Spec's

 

 
3 Part Specifications
 

SECTION 13125

ANGLE FRAME BLEACHERS

 

PART 1 - GENERAL

 

1.01 SECTION INCLUDES

        A.  Design and fabrication of angle frame bleachers

1.02 QUALITY ASSURANCE

        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.  Source Quality Control: Mill Test Certification.

        E.  Codes and Standards: 2003 International Building Code 

          

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,

              OR  warranty period shall begin on date of final delivery on

              projects installed by others.

        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.

 

1.04 ENGINEERING

        A.  Engineering certifications and calculations by a Registered

             Professional Engineer will be provided upon request, for a fee.

 

PART 2 – PRODUCTS

 

2.01 ACCEPTABLE MANUFACTURER

        A.  National Recreation Systems, Inc.                     

 

2.02 DESIGN

        A.  Applicable Codes:                     

             INTERNATIONAL BUILDING CODE (IBC), 2003 EDITION

        B.  Design Loads:

             1.  Live Loads: Uniform loading - Structure = 100 psf

                  Uniform loading - Seat and Foot plank = 120 plf

             2.  Sway Loads: Perpendicular to seats = 10 plf

                  Parallel to seats = 24 plf

             3.  Guardrail Loads: Uniform vertical load = 100 plf

                  Uniform horizontal load = 50 plf

                  Concentrated horizontal load = 200 pounds

             4. *Wind Loads: Basic design wind speed = 150 mph 

                  (exposure “B”) 

            

*Note: Bleacher must be anchored to meet wind loads above

 

2.03  ANGLE FRAME BLEACHERS

        A.  Quantity and Size:   Shall consist of ___  unit(s)  

             ___   rows high   x   ___ ' -  ___"   long.

             Net seating capacity per unit  ___ 

             (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 and

              local code requirements 

        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 Depth Dimensions: 8” vertical rise and 24” tread depth,

             Seat height is 17” above its respective tread. (except low rise

              & 3 row models)

        F.  Seats:     Nominal 2” x 10” anodized aluminum with anodized 

              end caps.

        G.  Treads:   Nominal one (1) or optional two (2) 2” x 10” mill finish

              aluminum with anodized end caps on rows 2 and up.

        H.   Risers:   Nominal 2” x 10” mill finish aluminum with end caps 

               on top row.  Nominal 1” x 6” mill finish aluminum with end caps

              on all other rows.

        I.   Aisles: Aisle footboards shall be of aluminum alloy 6063-T6

             and be of mill finish with contrasting aisle markings. 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.  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 support s 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 endcaps, and wire ties.

              2.  Vertical Picket System: Aluminum pipe and bar anodized after

                    fabrication & attached to supports with galvanized fasteners.

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.

                 Galvanized Steel: ASTM A36/A & A529/A after fabrication all

                  steel is hot dipped galvanized to ASTM A 123 specifications.

                  All crossbracing 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 6105-T5,

                  clear anodized 204R1, AA-M10C22A31, Class II.

             4.  Handrail Pipe: 1-5/8 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.

 

Note: Building codes may vary from site to site. The customer is responsible for verification of local code requirements.

 

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