Understanding Metal Deck Spans: How Far Can They Go?

By Admin | February 24, 2025

Metal decking is an integral part of modern construction. It is used to support roofs and floors in buildings. One of the most important considerations when using metal decking is how far it can span between supports without bending or breaking.

Here are some general span ranges:

  • Metal roof decks usually span 10 to 15 feet. Some deeper profiles can reach 16 feet.
  • Composite metal decks typically span 10 to 15 feet, with some unique designs reaching 20 feet.
  • Form decking spans depend on thickness and depth, but deeper profiles can cover longer distances.

Let’s take a closer look at what affects the span of metal decking and the different span capabilities of each type.

What Affects the Span of Metal Decking?

Several factors determine how far a metal roof deck or metal floor deck can span without extra support.

Type of Metal Decking

  • Different deck profiles (shapes) have different spanning abilities.
  • Deeper and stronger profiles allow for longer spans.

Depth of the Deck

  • The deeper the metal deck, the farther it can span.
  • A 3-inch deep deck will span farther than a 1.5-inch deep deck.

Thickness of the Metal (Gauge)

  • Thicker metal is stronger and can span longer distances.
  • A 22-gauge deck is thinner and spans less distance than an 18-gauge deck.

Span Conditions

  • Single spans need more support.
  • Multiple spans distribute weight better, allowing for longer distances between supports.

How Far Can Different Metal Decks Span?

Different types of metal decking have different span limits.

Metal Roof Decking

  • Usually spans 10 to 15 feet.
  • Some deeper profiles, like the HSN3 or N3 deck, can span up to 16 feet.
  • Used for roofs, canopies, and industrial buildings.

Composite Metal Decking

  • Standard spans range from 10 to 15 feet.
  • Special dovetail profiles can extend spans up to 20 feet.
  • Works with concrete to create stronger floors.

Metal Floor Decking

  • Supports concrete slabs in multi-story buildings.
  • The span depends on the deck thickness and depth.
  • Used in commercial and industrial buildings.

Form Decking

  • Mainly used as a base for concrete slabs.
  • The span depends on deck depth and gauge.
  • Reduces the need for temporary construction supports.

Why Choose The Myers Group for Metal Decking?

At The Myers Group, we provide high-quality metal decking for all types of construction projects.

Our Products Include:

✔ Metal Roof Decks – Strong and durable decking for roofs.

✔ Composite Metal Decks – Works with concrete for extra strength.

✔ Metal Floor Decks – Supports heavy loads in multi-story buildings.

Why Work With Us?

  • We supply top-quality metal decking from trusted manufacturers.
  • Our experts help you choose the right decking for your project.
  • Fast delivery to keep your construction on schedule.

FAQs About Metal Decking

  1. What is metal decking used for?

Metal decking is used to support roofs and floors in buildings. It provides a strong base for concrete or insulation materials.

  1. How do I know how far my metal deck can span?

The span depends on the type, depth, and thickness of the metal deck. Deeper and thicker decks can span longer distances.

  1. Can metal decking be used without concrete?

Yes, metal roof decks are often used without concrete. However, composite metal decks need concrete to achieve full strength.

  1. What is the difference between composite and non-composite metal decks?

Composite decks work with concrete to form a stronger structure, while non-composite decks act as a simple base without extra support.

  1. Where can I buy high-quality metal decking?

You can buy top-quality metal decking from The Myers Group. We offer expert advice and fast delivery for all your construction needs.

Contact The Myers Group to assist with your Span questions

Knowing how far a metal deck can span is essential for safe and efficient construction. Factors like deck type, depth, thickness, and span conditions all play a role in determining span limits.

At The Myers Group, we are known for providing high-quality metal roof deck from trusted manufactures to meet all project needs. Contact us today for expert advice and fast delivery of metal roof deck, composite metal deck, and metal floor deck solutions.

Posted in Metal Decking