When it comes to structural support in construction, metal decking plays a vital role in both floor and roof systems. With so many types of metal decking available, it’s essential to understand which option suits your project’s needs—whether you’re working on a high-rise commercial build or a small-scale renovation. At Drexel Supply Co., we offer a Vulcraft decking profiles, finishes, and custom options to meet every structural demand with speed, precision, and reliability.
In this guide, we’ll break down the most common types of metal decking, their benefits, and how to choose the right one for your project.
What Is Metal Decking?
Metal decking is a corrugated steel sheet that supports concrete or roofing materials in construction. Its primary function is to add structural integrity and serve as a working platform during the building process. Over time, different types of metal decking have been engineered to address various applications, load capacities, and building codes.
1. Roof Deck
One of the most widely used types of metal decking, roof deck is designed to support roofing systems and insulation. It comes in several profiles, including:
- Type B Decking – Most common, used for its balance of strength and economy
- Type N Decking – Deeper profile for longer spans
- Type A Decking – Older style, still used for repair or replacement in existing structures
Each of these types of metal decking offers unique benefits depending on load requirements and span capabilities.
2. Floor Deck
Also known as composite decking, this category of metal decking works with concrete to form a reinforced floor system. It includes:
- 1.5” Composite Deck
- 2” Composite Deck
- 3” Composite Deck
These types of metal decking have embossments or patterns that grip the concrete slab, creating a composite floor system with superior strength. Floor decking is ideal for multi-story buildings, mezzanines, and platforms.
3. Form Deck
Form deck serves as a permanent formwork for poured concrete. It doesn’t composite with the concrete but provides a fast, economical solution for slab support. Common types of metal decking in this category include:
- 9/16” Form Deck
- 1” Form Deck
- 1.5” Form Deck
These profiles are selected based on slab depth and span requirements. While not structural on their own, form decks are essential in many commercial applications.
4. Cellular Deck
Among the most specialized types of metal decking, cellular decking features a flat bottom plate welded to the corrugated deck, creating a concealed raceway for wiring and mechanical systems. It’s often used in architectural or high-tech facilities where aesthetics and functionality are both important.
5. Acoustic Deck
This metal decking includes perforations and sound-absorbing materials to reduce noise transmission in buildings such as auditoriums, schools, and offices. These types of metal decking help meet strict acoustic requirements while maintaining structural performance.
Choosing the Right Type of Metal Decking
The right type of metal decking depends on several factors:
- Structural Load Requirements – Heavier loads may require deeper profiles or composite action
- Span Length – Longer spans benefit from Type N or 3” composite decking
- Environmental Conditions – Galvanized or painted finishes protect against corrosion
- Project Timeline – In-stock options from Drexel Supply Co. can ship within 24 hours
Our team at Drexel Supply Co. can help you evaluate your options and choose the best decking profile based on your plans.
Why Contractors Choose Drexel Supply Co.
At Drexel Supply Co., we don’t just supply materials—we support your success. Our extensive inventory of all major types of metal decking, including Vulcraft profiles in multiple gauges and finishes, ensures you’ll find exactly what you need, when you need it. Plus, our custom fabrication services, expert detailing, and fast nationwide shipping keep your projects on time and on budget.
We also provide deck accessories, closure strips, and finishing options like hot-dip galvanizing and primer coating, giving you a complete solution in one stop.
Making the Right Choice for Your Metal Decking Needs
Understanding the different types of metal decking can make or break your construction project. Whether you need roof deck, floor deck, form deck, or specialized acoustic solutions, having the right material is critical. Drexel Supply Co. is your trusted partner in decking and bar grating—offering expert guidance, rapid delivery, and unbeatable service.
If you’re planning your next project and need help selecting the best types of metal decking, contact Drexel Supply Co. today. We’re here to provide the materials and support you need to build with confidence.
