There are 3 types for instaillation.
Floor mount (directly installed upon the front end of concrete step or wooden step, with screws in the bottom to fix the seat and the step).
Riser mount (seats are installed upon the aluminum feet, which fixed upon the riser slope of concrete steps or wooden steps)
bleachers seats (A row of seats installed upon a steel/aluminum/ concrete stairs, can also be telescope bleacher seats system).
All above Feet are High quality Aluminum Alloy Holders, Polished, sprayed surface, good quality and good appearance.
2, Pipe：High quality pipe connects 1-20 seats.
3, Steel parts: All are anti-oxidation.
4, Fastening piece：Standard screws and Cushion for connecting hoops and seats and feet. Using expansion bolt to fix feet on the floor.
5, Aluminum sheet for seats : Built in upside of the back parts, rows is in the both side of per sets.
3, Installation:
There are different ways of installation the arena seating, but there are 3 main methods:
First is floor mount (directly installed upon the front end of concrete step or wooden step, with screws in the bottom to fix the seat and the step).
Fixed seats on the floor with M8×70 extension bolts, the distance between seats is 480mm, the seats Hight about 425mm from the floor. To make sure the straight eats and rows.
According to Article 5.2 of JGJ57-2000: tolerances of average distance difference between seats should be less than 10mm, tolerances of rows distance difference should be less than 40mm.
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