What does the term "big door" typically refer to?

The term "big door" commonly refers to oversized or industrial doors, which are specifically designed to accommodate larger openings and heavier usage than standard residential doors. These doors are used in various settings, including warehouses, factories, and commercial buildings, where large equipment or vehicles need to enter and exit. The design and construction of big doors, such as roll-up or sectional doors, focus on durability and functionality to withstand the rigors of heavy-duty use. In contrast, the other options describe doors that are either standard in size, decorative in design, or simply have multiple panels, which do not capture the essence of what "big door" signifies in the industry.