The World Football Federation set forth strict regulations for stadium seats which must be satisfied by the invention, and these include shape, dimensions, and self-extinguishable material as well as absolute safety. In addition, the invention must solve the problem of low price of seats and fitting because a great number of seats on larger stadiums are in question. This seat resolves the problem of a single tool for manufacture of a single-piece seat with back without support with easy, fast, safe and cheap fitting requiring twice smaller the number of bolts and anchors without a possibility of easy undesirable removal.

Well-known designs of such a type of seats are as follows: Various constructions of metal supports, bracket, plate-like, tubular Games and legs to which plastic seat shells are connected via bolts, and these also by bolts with anchors to the concrete base. Another form of well-known designs reflects in a direct connection of the plastic shell and the base. One well-known example is the seat manufactured by the Italian Manufacturer Venelli, Novanta 2, which is tied to the base by two bolts directly through the seating surface of the seat. In this design. an extra small shearing surface can be seen at the bolt place for the case of aggressive pulling out of the seat.

As one well-known design we would also quote our design registered under No. P-263/96 which, in contrast to this dX has a support tied to the base, and the seat shell pulled over the supp(i?r lengthwise the guides locked with the appropriate teeth.

The drawing figures describe more detailedly the invention on an example of the method of execution: - Fig. 1 shows view of the seat from above - Fig. 2 shows the lateral view of the seat with the bottom elbow - Fig. 3 shows the lateral view of the seat with the upper elbow - Fig. 4 shows a detail of the lateral view when the upper and the bottom elbows are in overlapping position, cross-section - Fig. 5 shows the bottom elbow mask - Fig. 6 shows the upper elbow mask - Fig. 7 shows a series of seats with the overlapping joint viewed from above.

The seat for stadiums with the overlapping joint, according to the invention and Fig. 1, consists of a seat shell and lateral elbows 2 and 3.

Item 2 is the upper elbow and Item 3 the bottom elbow. The bottom elbow 3 undergoes the upper elbow 2. The seat back 4 is formed as a box and consists of the front wall 5 and the rear wall 6. The opening 7 is planned for water flowing out of the concaved seating surface and is located on the lowest point. Bearings for bolts with anchors 18 of the upper elbow are 8 and 9 while the bearings for bolts of the upper elbow are 10 and 11. The rib 12 is located on the upper elbow and the groove 13 on the bottom elbow.

The bottom elbow mask 14 overlaps the bottom elbow 3 and is located at the end of the upper elbow 2, in the beginning of a series of seats of each row.

Tenons 16 and 17 are placed after the seat assembly has been finished and they form the bolt heads with the opening for kcy inaccessible to undesirable removal. The tenons are removed similar to a drill for removing the wine plugs.

'I'he overlapping joint, according to the invention, enablc4?Çto.« and firm connection between the seat and the base 19 in four seatN with two bolts per seat, thus achieving great saving on stadiums Wx large number of seats. At fitting (assembly) no model is required because seats undergo one under the other, and the elbows 2 and 3 define a distance between the seats, the seat step, which is ergonomically defined.

After fitting the first seat, the next to it is to be fitted so that the upper elbow 2 of the second seat covers the bottom elbow 3 of the first seat.

After that, a concrete base is drilled through the covered bolt openings in the bearings 8, 9, 10 and 11, and the bolts with anchors knocked in these openings. Thus the seat is fitted and fixed to the base by a simple and fast procedure. The seat shell 1 includes in one casting the seat back 4 consisting of the front wall 5 and the rear wall 6, as well as the lateral overlaps in the form of elbows 2 and 3 on which are located the bearings for bolts 8, 9, 10 and 11. The rib 12 and the groove 13 for stiffening purposes are located on elbows. Special components, castings also made of plastics, are the masks 14 and 15, as well as tenons 16 and 17. The opening 10 for connecting the bolt is in the form of a slit so that every seat could be turned a little bit as stadiums are constructed in the form of archs with big radius. According to the invention, with such a design of the seat-base joint, a compact and safe connection resistant to pulling out and tearing out has been achieved, as well as orderly arrangement of a series of seats in each row with the unifonn step and cheap assembly.