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What does "spandrel glass" typically conceal?

  1. Temperature variations

  2. Aesthetic imperfections

  3. Structural elements, often with an opaque finish

  4. Window frames and sills

The correct answer is: Structural elements, often with an opaque finish

Spandrel glass is designed specifically to conceal structural elements of a building, such as beams, columns, or floor slabs, that are not visually appealing. It is often used in areas where transparency is not desired, typically found between the windows of a curtain wall system on high-rise buildings. The opaque finish of the spandrel glass effectively hides the underlying structural components, providing a more uniform and aesthetically pleasing external appearance to the building. This feature is particularly important in architectural design, as it allows for greater design flexibility while maintaining the overall visual integrity of the structure.