What type of glass is designed to be stronger and can be formed into larger sheets but shatters upon impact?

Plate glass is a type of glass known for its high strength due to the manufacturing process that involves casting or floating molten glass on a flat surface to create larger, uniform sheets. This process not only increases its thickness but also provides a clearer view, making it popular for windows and other applications where clarity and size are important.

However, one of the key characteristics of plate glass is its tendency to shatter upon impact. When broken, plate glass can produce sharp shards that may pose safety hazards, which is a consideration for fire safety and building codes.

The other options do not describe a type of glass. Projected windows refer to a style of window design, rafters are structural components of a roof, and a party wall is a shared wall between two properties. Therefore, plate glass is distinctly recognized for being both strong and prone to shattering, making it the correct choice in this context.