Award winning design

A stylish award-winning sports chair designed by our partner Forum Seating.

  • Choose your level

    Abacus is available in3 levels of specification and comfort: Bronze, Silver (with upholstered pads to seat and/or back) and Gold (fully upholstered). In large venues, the same chair can therefore be specifed across all areas; from general seating to VIP and box areas.

  • Incredibly tough

    The chair is tested and certified to the highest test level of the European strength standard for ranked seating EN 12727:2000 (Level 4). You can watch the chair undergoing some "extreme" testing by watching this YouTube clip.

  • Rail mounted design

    The rail mounted design allows fast installation and infinitely flexible positioning. Layouts are also future proof with the option to upgrade the seating specification for VIPs at a later date.

  • Gravity tip

    Robust, spring-free tipping operation.

  • UV resistance

    Tested for UV resistance as per ISO 4892-2

  • Flammability

    Certified to the flammability standards EN 1021-1 and EN1021-2



In polyamide with glass fibre.

Seat Identification

Seat numbers and row letters.

Colour options

Six colours are available as standard; others are available on special order. See the datasheet in the downloads section for details.


Seat width (centre to centre)

Minimum 465mm without armrests; minimum 535mm with armrests

Chair height


Depth when open

Bronze / Silver: 513mm; Gold: 521mm

Depth when closed

Bronze / Silver: 273mm; Gold: 277mm

Abacus Datasheet