Types and Uses of Metal Floor Deck

Author: Minnie

Aug. 04, 2025

Types and Uses of Metal Floor Deck

In a previous article, we discussed the different types of metal roof deck. Just like metal roof deck, there are many types and uses of metal floor deck. If you are choosing metal floor deck for a construction project, you need to know which type will best fit your needs.

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In this article, we will review the different kinds of metal floor deck, how they are used, and what kind of projects they can be used for.

What Is Metal Floor Deck?

Metal floor deck serves as a base for flooring systems. Most often, the metal floor deck is laid down, and concrete is poured on top of it to form a strong foundation.

Much like roof deck, metal floor deck can be formed in different widths, depths, and gauges to fit the needs of different commercial and industrial construction projects.

What Are the Types and Uses of Metal Floor Deck?

There are two overarching types of metal floor deck: composite deck and form deck. Each of these types has several varieties in different widths, depths, and gauges.

Composite Deck

Composite deck is a strong but lightweight metal floor deck. It is designed to provide extra strength for flooring systems without adding extra weight.

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Composite deck has embossments designed to interlock with concrete slabs. The combination of floor deck and concrete serves the dual purpose of permanent form and positive reinforcement.

The three types of composite floor deck are 1.5 inch, 2 inch, and 3 inch composite deck.

1.5 Inch Composite Deck

2 Inch Composite Deck

3 Inch Composite Deck

Form Deck

Metal form deck is used extensively in floor construction. It serves as a permanent steel base for poured, reinforced concrete floor slabs.

Unlike composite deck, form deck does not have embossments. It is a smooth sheet of metal deck that does not become bonded to the concrete. Instead, it is used to support the weight of wet concrete that is poured on top of it to create flooring systems.

There are 3 common types of form deck: 9/16 inch, 1 inch, and 1.5 inch.

9/16 Inch Form Deck

1 Inch Form Deck

1.5 Inch Form Deck

Metal Floor Deck from CSM

Now that you understand the different types and uses of metal floor deck, you can confidently choose which type is best for your project.

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