Carpenters, Glaziers, and Other Tradespeople Answers

Based on the following passage, why might an architect choose to use a curtain wall? Office buildings and high-rises often include a curtain wall of glass, which requires advanced systems of fastening glass plates together. In a building with a curtain wall, the covering of the building does not serve a structural purpose; it is simply a façade that keeps out the elements. A curtain wall can be made of a number of different materials, such as aluminum, stone veneer, or glass.

The main difference between lumber and timber is that lumber never has bark on it while timber often does.

What process has made it possible to create load-bearing glass?