Need a few more seats than a 3 row bleacher, than a 4 row is your answer .a 4 row bleacher is the last size bleacher available before you step up into safety fence. They are a bit heavier than a 3 row but can still be moved around fairly easy when assembled. All our bleachers are made in the United States of America by Americans with 3/16 aluminum angle extruded by American mills, all materials used meet the buy American act. They can be used indoor or outdoor and are well suited for commercial use because of IBC 2012 compliance.
4-ROW, 6”/24” SPECIFICATIONS WALK ON THE SEAT BLEACHERS SIZES, 7’6”, 15’0”, 21’0”, SPECIAL ORDER 27’0” NET SEATING: 7’6”/ 20 seats, 15’0”/ 40 seats, 21’0”/ 56 SEATS, 27’0”/72 SEATS - Based on an 18” seat
Fabrication – Live Load / Codes / References 1. 100-p.s.f gross horizontal projection 2. Lateral sway load: 24 p.1.f seat plank 3. Perpendicular sway load: 10 p.1.f seat plank 4. Wind load: 30 p.s.f vertical projection 5. Live load of seat and tread plank: 120 p.1.f minimum 6. Guardrail, Handrail & Intermediate rail A. NOT REQUIRED 7. Meets or exceeds design load and safety standards set by ICC, UBC, SBCCI, BOCA,SBC, 2006 NFPA 101 & 102, F.B.C. 425 (SREF), Aluminum Association of America, Federal ADA Requirements and Florida Fire Safety in Educational Facilities Rule 69A-58. American Welding Society (AWS), American Society for Testing and Materials (ASTM) & American Society of Civil Engineers (ASCE).
Understructure – Aluminum Frame Structure: 1. Understructure shall be fabricated from 6061-T6 & 6063-T6 alloy aluminum extrusions, or on request galvanized steel. 2. Framework: 2” x 2” x 3/16” aluminum angle, galvanized steel angle 3. 1 ½” x 1 ½”x 3/16” make up cross bracing and straight bracing. 4. The understructure shall be assembled from the above items and assembled with hot dipped galvanized fasteners, stainless steel on special request. Guardrail Systems/ NOT NEEDED
Plank extrusions 1. Seats A. Seat planks shall be 6063-T6 extruded aluminum with a fluted, nonskid surface and a minimum wall thickness of nominal .078”. B. Seat planks shall be nominal 2” x 12”,clear anodized or powder coated silver, school colors available on request. C. Seat planks shall attach with 2ea, 2.0” aluminum clips with galvanized carriage bolt and nut. 2. Footboards A. Footboard planks shall be 6063-T6 extruded aluminum with a fluted, nonskid surface and a minimum wall thickness of nominal .078” B. Single plank i. One nominal 2” x 10” plank [Acceptable for floors less than 30” above grade] 3. Footboard planks shall attach with 3.5” aluminum clips with galvanized carriage bolt and nut. 4. Rise and depth dimensions: 6” vertical rise and 24” tread depth. Seat height is 12” above its respective tread or grade.
Aisles/ NOT NEEDED Hardware 1. All nuts and bolts: galvanized per ASTM-153/ or on special request stainless steel 2. Hold down clips and plank connection inserts: 6061-T6 aluminum alloy 3. Primary connections, cross-bracing and handrail shall be made with a minimum of 3/8” diameter hardware bolts 4. End caps: End caps for seat board shall be extruded aluminum and secure with aluminum pop rivet or welded.
Mud Sills 1. 2” x 6” x 72” treated wooden studs, available on request and 3/8” galvanized fasteners.
Tip & Roll 1. A series of locking caster wheels with soft rubber wheels, so that unit can be tipped and transported on its side and stored against the wall for storage without scratching the hardwood or finished floor.
Uplift or Windlift Concrete Anchors ½” x 3 ¾ galvanized power or wedge anchors to be drilled and anchored into concrete slab or foundation to meet required State & Local Uplift or Windlift requirements.
Warranty: a. The manufacturer shall warrant all assembly work performed under these specifications to be free of defects for a period of one year when installed by a trained SES installer. b. Any materials found to be defective within one year shall be replaced at no cost to the owner. c. Acts of vandalism or abuse shall render the conditions of this warranty null and void. d. Any exposed mill finished aluminum surface that may become discolored, which is caused when mill finish aluminum gets damp for water either during normal freighting or site installation resulting in oxidation called Mill Stain, this is a natural phenomenon and will ultimately fad. Bleacher manufacturer will not be responsible for this type of discoloration due to oxidation or Mill Stain when dealing with mill finish aluminum.