California Structural Steel Contractor (C-51 License) Practice Exam

One or more rows of a structure placed one above another are called:

Tiers Bays Levels Modules

Correct Answer:

Tiers

Explanation:

Vertical stacking of rows in a structure is described as tiers. A tier is a row or layer that sits above another, creating multiple stacked rows. This term is used to express how elements are arranged in vertical sequence, such as tiers of platforms or tiers in a scaffold. Bays are the openings between frames, not the vertical stacking itself; levels refer to floors or elevations, which is related but not the same as rows placed above one another; modules are preassembled units used in modular construction.

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