We are a supplier of telescopic tribunes based on a modern folding system.Our tribunes are characterized by modern design and high aesthetics. The design methods used by us allow us to customize all the material, geometric and dimensional parameters of the grandstand, such as the level difference, row spacing, module length, seat spacing, so we can adapt the grandstand to the stylistic expectations and individual architectural conditions of the facility.

TELESCOPIC TRIBUNES TT-BETA SYSTEM

System Description

The system is dedicated for sports halls as wall-fixed or mobile stands. A characteristic feature of this grandstand system is that the seats (benches or plastic buckets) are permanently installed to the grandstand structure. The platforms start from the second row, in the first lowest row viewers keep feet the sports floor. The platforms have a level difference from 320 to 400 mm, each platform in the staircase is equipped with an intermediate step with a height of different half of the difference (160-200 mm), the entrance to the first platform is via movable intermediate step.

Seats, armchairs

In the telescopic stands of the TT-BETA system, various types of seats and armchair systems can be used:

1. Type TT-BETA-L. Bench type seats, made of 30 cm wide plywood bench, with the possibility of additional equipment with upholstery covers, as well as folding slat or plywood backs.
   
   

2. Type TT-BETA-PN. Seats with low backrest H = 11 cm in folding rows, in the last two non-folding rows higher seats with backrest H = 25 cm can be used

3. Type TT-BETA-PW. Plastic seats with backrest H = 25 or 32 cm, for construction reasons possible to use in the stands with the level difference of 350-400 mm, without front panels.
   

   4. Type TT-BETA-PS. Seats with folding backrest, seats and backrests made of blown polypropylene (in Blow-Molding technology). The backrest assemblies are folded down before closing the grandstands and upright after opening.

   5. Type TT-BETA-ST. Seats with folding backrest, seats and backs made of specially profiled plywood. The backrest assemblies are folded down before closing the grandstands and upright after opening. We offer additional upholstery covers for the seat and back.

The supporting structure of the stands and the roller system

The construction of the telescopic tribune is based on the system of sliding frames. The traveling frames are made of powder-coated steel profiles, the support columns are made of 80x40 mm (up to 5 rows), 100x40 (6-11 rows) or 120x40 (12-18 rows). With the polyamide roller system, the grandstand folds slightly, so it can be folded down even by one person.

The driving frames are equipped with wheels and rolls:
- traction on the floor: polyamide wheels with an additional polyurethane tread, with a diameter of 100 mm and a width of 40 mm, each equipped with two ball bearings, 4 wheels per frame.

- upper guide supports: polyamide rolls with a diameter of 55 mm and a width of 33 mm, each equipped with two ball bearings.

- lower guide, spacing and fixing the position of the frame relative to each other: polyamide with a diameter of 25 mm and a width of 10 mm, equipped with ball bearings.

Increased number of wheels means that the floor's point concentrated force is low (below 1 kN per wheel). The mobile works and moves on only polyamide rolls with ball bearings, so all steel-steel contact points have been completely eliminated between subsequent frames, which makes the folding system work lightly, smoothly, quietly and with trouble-free operation.
The supporting structure of the tribune is based on the girders made of a double 100x40 profile (200x40 mm in total), which is carries all loads of tribune. The girders also act as risers, enclosing the platform space, which prevents objects falling from the platform under the bleacher.

Platforms and steps

Platforms made of 18 mm anti-slip plywood in brown, black or gray are mounted directly to the front and rear beams. Optionally it is possible to cover the platforms with a carpet that is fixed and finished with aluminum slats or other individual finishes.
Stairs in the staircase and intermediate steps are additionally finished with a 40 x 20 mm grooved aluminum stair profile, powder painted in the color of the structure. As standard, in the case of auditorium facilities, we offer modern LEDSTEP stair profile with a double anti-slip rope and bottom illumination in LED technology, in black or satin.

Front panels

Esthetic masking panels are installed on the front of the tribune, made of 18 mm thick gray (colored RAL 7035 or other) panel. On request, other finishing materials are also used, e.g. HPL board 8 mm, or MDF, e.g. perforated.

Safety barriers

The stands are equipped with rear, side and front barriers depending on the configuration of the stand. Side barriers are installed as standard starting from the second platform (in the first there is no need).
Rear barriers are installed when the grandstand is free-standing (or movable) or when there are unprotected spaces at the back of the grandstand (for example when the tribune is put beside the building's columns or holes).
In the case of permanently installed stands, alternatively, instead of rear barriers, the platform may be extended to the wall, crating complete floor.

Side barriers can be made in variants:
TYPE BT1: vertical barrier installed permanently - in the case of grandstands up to 5 rows.



TYPE BT2: vertical barrier removable - for stands higher than 5 rows.

TYPE BT3: vertical barrier articulated deflected: the railings are upright during use of the grandstand, they are unblocked for folding the grandstand and articulated deflected.
TYPE BT4: fixed diagonal railing - for stands with more than 5 rows. The railing is made with a constant deviation of approx. 10 degrees. The collision-free position of subsequent barriers during folding eliminates the need to disassemble them.

The railing frame is made of 35x35 mm square profile, frame corners bent to R99 mm radius, vertical infill made of 20x20x2 mm angle bars, max. 120 mm.

Opening and closing the grandstand

Locking the grandstand's position after opening or closing is made by footers with a knob (except for electric folding stands where the positions are fixed permanently by a stopped engine with a drive unit)

Electric drive

Stands (up to 5 rows) are normally folded manually.

Optionally (from 6 rows as standard) we equip them with electric drive modules. The drive is a 230 / 400V three-phase motor, 0.25kW, 860 rpm, IP54, worm gear reducer i = 100. Cast iron transmission wheels diam. 200 mm with 80 mm wide polyurethane track, 70-75 Shore hardness, 2 pieces for one engine module. Depending on the configuration, one drive module supports about 6 running meters of stands. Individual drive modules work synchronously.
It is suggested to make a dedicated tribune power supply installation. In the absence of a dedicated installation, power supply and control of the stands can be done using the included power supply and control set.