Which construction type is built off-site and then put in place?

• A. Precast
• B. Heavy Floor
• C. Heavy Wall
• D. Heavy Frame Steel

Answer: (A)

The main idea here is prefabrication: components that are manufactured away from the job site and then brought to the site for installation. Precast concrete elements are formed, cured, and finished in a controlled factory setting, transported to the project, and then placed into position with cranes and connectors. That’s fundamentally different from elements that are poured or assembled on site, like a floor or wall that is cast in place, or a steel frame that is manufactured in shops but is erected and connected on the job site. Because precast parts come to the site as ready-made units and are simply put in place, it is the construction type most clearly built off-site and then installed.