The statement 'Until the 19th Century there was no such thing as structural engineering' is true.

• A. False
• B. Not applicable
• C. Sometimes true
• D. True

Answer: (D)

The key idea being tested is how structural engineering emerged as a formal field. Before the 19th century, there was no distinct, codified discipline called structural engineering; builders and architects relied on empirical know-how and craft to design and construct structures. Ancient and medieval builders demonstrated impressive practical knowledge (like Roman arches or Gothic vaults), but there wasn’t a formal science of analyzing structures as a separate profession. The 18th–19th centuries brought systematic development: mathematical theories of strength, bending, buckling, and stability (think Euler and others), advances in materials like iron and steel, and the professionalization of civil/structural engineering with dedicated societies and education. Because of this shift to a formal, systematic discipline in that era, the statement is considered true.