The large-scale facility Dutch door, also known as the "Elephant Door", is a special-purpose swing door custom-designed for venues requiring oversized passageways, such as exhibition halls, convention centers, and large commercial complexes. To ensure performance and reduce self-weight, the door leaf and frame skeleton adopt a force-reducing structural design. 

The large-scale facility Dutch door, also known as the "Elephant Door", is a special-purpose swing door custom-designed for venues requiring oversized passageways, such as exhibition halls, convention centers, and large commercial complexes. To ensure load-bearing capacity while reducing self-weight, the door leaf and frame skeleton adopt a force-reducing structural design, with computer-aided simulation used to develop swing doors with large spans and heights.

Based on the actual needs of the doorway area, multiple different hardware components such as door closers and center-hung pivots are combined to form a complete large-scale facility door system solution.

With its "primary-and-secondary door structure", when large vehicles or objects need to pass through, closing the "secondary doors" and opening the "primary door" creates a large passage with a maximum width of 8 meters for easy access. Under normal circumstances, only the four "secondary doors" need to be opened to meet the passage requirements of regular pedestrian flow.