According to on-site maintenance personnel, unlike traditional fixed concrete grandstands, this retractable grandstand uses a layered, interconnected steel frame structure with no complex external components. The bottom layer uses embedded silent rubber wheels, hidden inside the support beams, preventing direct pressure on sports flooring or wooden floors, and ensuring that daily extension and retraction will not scratch indoor floors. The entire grandstand is synchronized through cross-links, ensuring alignment and no misalignment when extended, and fitting snugly against the wall when retracted, occupying only about 11% of the space in its extended state. Compared to scattered movable plastic seats, the tiered grandstand seating arrangement is neat and orderly, with unobstructed views for rear-row spectators, significantly improving viewing comfort.
In terms of practical performance, the product balances durability and safety details. The main steel frame undergoes double rust-proofing treatment with acid pickling and electrostatic powder coating, ensuring no rust for ten years under normal indoor use. A single row of platforms can withstand a static load of up to 480kg, meeting the needs of high-frequency usage scenarios such as dense seating and group standing applause. To address safety hazards during the extension and retraction process, the equipment is equipped with side anti-pinch strips and end anti-reverse latches, automatically locking the system when people are moving up or down the platform to prevent accidental slippage. Two drive versions are available: manual and electric. The manual version can be operated independently by a single person, taking 2-3 minutes; the electric version is equipped with a power-off self-locking device, preventing slippage and collapse during sudden power outages.
Currently, this type of grandstand is widely used in multi-functional halls of primary and secondary schools, township cultural halls, and indoor sports stadiums. Previously, these venues required the temporary transport of thousands of chairs for cultural performances and large gatherings, which was time-consuming, labor-intensive, and resulted in cluttered storage. With the use of the telescopic grandstand, venue switching time has been reduced by 90%, and there is no need for a separate storage area. Industry insiders say that public cultural and sports venues are now transforming into "multi-purpose venues". Retractable grandstands do not require changes to the original building foundation, have a short construction period, and only require replacement of worn parts for later maintenance. Their operation and maintenance costs are far lower than those of traditional grandstands, making them suitable for the transformation needs of grassroots cultural and sports spaces in China.