Which of the following is NOT one of the four heavy construction types?

• A. Heavy Wall
• B. Concrete Tilt-Up
• C. Precast
• D. Heavy Floor

Answer: (B)

In this topic, the focus is on how a building’s dominant load-bearing elements are categorized to predict how it may fail and what hazards crews will face during a rescue. The four heavy construction types describe the primary load paths and how the main structural elements work together—typically involving thick, load-bearing walls, substantial floor systems, and the use of large, often factory-built elements. Concrete Tilt-Up, on the other hand, is a construction method: wall panels are cast flat on the ground and then raised into place. While tilt-up panels can be part of a heavy-wall system, the term itself refers to how the building is assembled rather than to the fundamental load-bearing configuration.

That distinction is why tilt-up is not considered one of the four heavy construction types in this framework. The other terms describe the core structural configurations (heavy walls, heavy floors, and similar load-bearing assemblies or precast elements), whereas tilt-up is about the fabrication and installation process of wall panels.