Due to the characteristics of the factory, the lower rail was constructed with a high-strength material and a lower rail for the car center to withstand the load of the car.​
Therefore, it is possible to move smoothly without any bumps on the road, and the winged design reduces the impact of the lower rail by distributing heavy weight.​

It is a good folding door for insulation, soundproofing, and waterproofing, and it does not cause any noise from working inside the factory to be generated from the outside, so it does not harm other buildings, factories, companies, etc. around it.

It also has a good blocking effect, blocking the inflow of outside temperature into the factory on cold winter days and hot summer days, helping to reduce cooling and heating costs.