Due to the nature of the warehouse, heavy vehicles frequently enter the interior, so the lower rail was constructed with high-strength materials and lower rail for car centers to withstand the load of the car. Therefore, it is possible to move smoothly without any difficulty in passing, and the wing-type design reduces the impact of the lower rail by distributing heavy weight. Polzen Korea Folding Door, which is excellent for insulation, soundproofing, and roomproofing, does not cause damage to other buildings, factories, and companies around the factory because the noise generated from the inside of the factory does not count to the outside.

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

Folding door is the most open-minded advantage. More than 90% of the doors can be used more widely and space utilization is high. In addition, frequent ventilation of dust and odors from the storage or transportation of goods can maintain a pleasant workplace with fast air circulation to suit the characteristics of the factory.​

Opening and closing all folding doors reduces frustration in the internal workspace due to the effect of space expansion.