Which type(s) of construction project normally have a set of specifications?

The correct answer highlights that commercial and industrial construction projects typically have a set of specifications. This is because such projects often involve complex systems and require detailed guidelines to ensure that all parties involved understand the project's requirements. Specifications provide crucial information regarding materials, quality, workmanship, and standards essential for compliance with local codes and regulations.

In commercial projects, for example, proper specifications are vital for large-scale buildings like offices, retail spaces, and public facilities, where particular performance standards and safety measures must be met. Similarly, industrial projects like factories or manufacturing plants involve specialized materials and intricate systems, necessitating precise specifications to address these complexities and ensure operational efficiency.

While residential projects sometimes include specifications, they generally do not require the same detailed level of documentation because they often follow standard building practices that are less varied. Therefore, the presence of detailed specifications is more commonly associated with commercial and industrial construction, making that the correct choice.