Steel Deck

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Steel Deck

Steel deck is a cold formed corrugated steel sheet supported by steel joists or beams. It is used to support concrete or insulating membrane of a roof. It was developed to provide a structurally efficient product for use in roof and floor systems.

Its design and fabrication maximizes the properties of the steel in order to create a high strength-to-weight ratio, which lowers the material handling and erection costs but maintains the durability that has been proven by over 50 years of satisfactory performance.

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Despite the fact that it is a structural component, its uniform quality can offer an attractive appearance, especially with the use of properly specified shop and field applied coatings. Steel deck is also a component of many UL and ULC approved fire rated assemblies.

Shear connectors, perimeter angles — there are two main ways to transfer diaphragm forces from the steel deck to the collector beams. Learn more about the pitfalls to avoid and factors to consider when choosing a transfer method so you can facilitate your design.



deck profile summary


Interactive tool

These interactive tools were created to assist you during your selection of Canam Buildings construction products.

Roof deck

Floor deck


The following features differentiate the four primary types of steel deck:

Roof deck products are typically used as the structural component of many flat, pitched, or arched roof systems because of their benefits with regards to strenght, weight, and economy. It is commonly attached to open web steel joists, structural steel, or light gage framing.

Aside from the standard roof deck profiles, long-span, cellular, acoustic, and cellular acoustic products are also available to meet project needs. Shop curving of some roof deck products is also available with certain radius limitations.

Steel Deck Diaphragm

The steel deck sheets used for roofs and floors provide support for gravity loads between the joists and/or beams. Once installed, these sheets can also be used as a horizontal brace, therefore, allowing the steel deck to act as a diaphragm.


By analogy, the fluted deck is equivalent to the web of a horizontal beam of which the flanges are the perimeter structural members connected to the deck. The span of that horizontal beam is defined by the distance between the vertical lateral load resisting systems connected to the deck.

The secondary elements form stiffeners for the web produced by the fluted deck. As for normal beams, the deck (web of horizontal beam) must be attached to the perimeter members (flange of horizontal beam) to ensure transfer of the shear forces.

Composite deck is designed for use with structural concrete, and is manufactured with mechanical embossments in the webs to create mechanical and chemical bond between the deck and the concrete.

The composite action allows the deck to serve as the tensile reinforcement for positive bending in the slab, which significantly reduces or eliminates the need for rebar in the slab and lowers material and labor costs.

Composite deck is designed for use with structural concrete56

The strength and durability of the steel provides a solid platform for construction on top of open web joists, structural steel, light gage framing, or masonry walls. The deck acts as a form for the concrete and is typically designed so that shoring is not required.

Cellular and cellular acoustic composite deck products are also available.

Form deck, otherwise known as stay in place form deck, is used in conjunction with structural concrete or lightweight insulating fill for floor or roof applications. Because it does not have mechanical embossments in the webs, it cannot develop composite action, and other means of reinforcement must be used in the concrete. It strictly serves as a platform for concrete or fill over open web joists, structural steel, light gage framing, or masonry walls. Venting of form deck is also available as a means of venting the concrete or fill.

It strictly serves as a platform for concrete 56

Canam has a wide variety of products for each type of steel deck to meet the needs of almost any project and make steel deck a smart and economical choice. Along with the standard SDI profiles we also offer the following specialty decks:

Acoustic deck contains fiberglass insulation batts that are designed to absorb sound and prevent achoing within the space. For non-cellular deck there are perforations in the webs with fiberglass batts field installed on top of the deck in the low flutes.

acoustic deck 3d image

The Galvanized Coating Process

The Galvanized Coating Process

Discover the galvanizing process, quality control and prevention of stain problems on the satin finish deck.

 From our Plant to your Achievement

From our Plant to your Achievement

We invite you to discover how Canam can help you materialize a project idea and add it to your achievements portfolio.

Resource Library

Commercial - Canada (5)
  • 3N - Steel Deck Profile for Roof
  • LF3 Steel Deck
  • Reveal Series - Architectural Deck Products
  • 1.5B Steel Deck Profile Roof and Floor
  • Lunch and Learn Courses
Technical - Canada (3)
  • Steel Deck Diaphragm
  • Roof Deck Datasheet (Canada)
  • Reveal Series - Architectural Deck Products
Parametric Objects (3)
  • Steel Deck - Installation Instructions
  • Steel Deck Canada
  • Steel Deck Sample


Canam’s integrity and outstanding customer service have taken them beyond a simple joists and steel deck supplier to being a key partner in our business. "
Tim Houtsma, Chief Executive Officer, Marid Industries Ltd.
Canam is the obvious choice! [...] It's beyond a supplier-customer [relationship]: it’s a partnership. Great communication is key. That's it. "
Patrick Bellavance, President, Acier Robel
Canam understands today's aggressive construction schedules, and is always willing to improve their products and actively contribute to the progress of our industry. Working with Canam is a pleasure. "
Laurier Trudeau, Vice President Field Operations, Abesco Ltd