Skip to content
Home Page


by Vulcraft®

Vulcraft’s FormLok Dovetail Deck System uses the intrinsic strength and aesthetic appeal of the dovetail shape to provide the architectural and structural design communities with a virtually endless variety of floor and ceiling deck design solutions.

Make it wider
Make it stronger. Make it possible.

Design Versatility.

Architects are driven by a desire to break through the boundaries of what is possible and make something unforgettable. And the more design freedom they have, the more opportunity there is to really push those limits. At Vulcraft we foster those freedoms with products, online tools and customer service which allow you to explore multiple design options to help your vision come to life.

Home Page


FormLok® Composite Floor Deck.

The Vulcraft FormLok Dovetail Composite Floor Deck is one of our most versatile and practical products. It is possible to achieve longer spans of 10’-6”, higher load capacities up to 300 psf, shallower floor depths enabling you to fit more floors into low rise buildings and unprecedented sound ratings – delivering design flexibility and giving you the opportunity to create something truly impactful. And the fact that our dovetail deck offers the price point of wood with the longevity of steel helps you stay within scope and provides peace of mind to all those involved in the project.

The Freedom to Use a Variety of Flooring Finishes.

Vulcraft’s FormLok Dovetail Composite Deck helps give you the freedom to finish your floor any way you see fit. Thanks to its superior sound ratings, you can easily find a finish that meets code and fits your vision. Get a modern industrial look with exposed concrete. Choose engineered wood flooring for a more classic feel, or choose from a multitude of other materials to create something totally unique. Whatever aesthetic your design demands, our dovetail deck will help make it possible.

Home Page

Sweet Silence

Superior Sound Ratings.

When used with a typical assembly, our dovetail deck acoustics give you design freedom like never before and provides superior sound performance – boasting airborne sound ratings ranging from 55 STC for decks using exposed concrete to 62 STC for decks using ceramic tile. This versatile system also dramatically reduces impact noise, resulting in impressive IIC ratings regardless of what finish you use. Whether it’s engineered wood, ceramic tile or anything in between, our dovetail deck superior sound ratings give you the opportunity to create something that meets your customers’ needs and matches your creative vision.

Home Page

Impact Insulation Class (IIC) is an integer-number rating of how well a building floor attenuates impact sounds, such as footsteps.

Sound Transmission Class (STC) is an integer rating of how well a building partition attenuates airborne sound. It is widely used to rate interior partitions, ceilings/floors, doors, windows and exterior wall configurations.

Let’s Build

Hanging Solutions.

When it comes to effectively hanging or bracing mechanical systems from a Vulcraft’s FormLok Dovetail Composite Deck or Dovetail Ceiling/Roof Deck, there are a couple of different options to choose from depending on what type of system you have.

Sammy X-Press® Swivel Head Fasteners

Home Page

Vulcraft recommends using Sammy X-Press® Swivel Head Fasteners to securely hang or brace your mechanical systems for dovetail or acoustic dovetail roof deck. These swivel head fasteners are easy-to-use and save you time and money on installation.

Wedge Nuts

Home Page

Vulcraft recommends using Wedge Nuts to hang or brace your mechanical systems for Dovetail FormLok Composite Deck. Wedge-nuts are strong, durable, easily fixed into the V channel by hand and allow for heavier loads.


Dovetail Ceiling/Roof Deck.

With the combination of performance and versatility, Vulcraft Dovetail Ceiling/Roof Deck not only acts as a superior floor decking system, but it’s also the perfect decking system for your roof. Strong, beautiful and boasting impressive sound ratings, it is the ideal ceiling system when you want quality performance with a clean, modern look. Whether you’re hanging lighting fixtures from it or opting for a clean and uncluttered look, our dovetail roof deck will set your next structure apart.

Rated Fire-Safe.

Not only does Vulcraft’s FormLok Dovetail Composite Deck provides utility, versatility, and aesthetics, but it also offers safety. With fire ratings ranging from 1.5 to 3 hours, you can be confident you’re building a sound, quality structure.

Free Specifications with ARCAT.

Vulcraft is proud to partner with ARCAT, the leading online resource for free building product information. With ARCAT, you can enjoy a wide variety of AEC tools and the most extensive, up-to-date specification library available. You’ll also have access to over 7000 CAD details, spec writing tools, and LEED® reports for your project and materials. Plus, the ARCAT BIM library has thousands of complex BIM objects and systems available in a number of different formats for your convenience. It’s a powerful partnership that benefits all those involved in the building process.

Specifications for Dovetail Ceiling/Roof Deck and FormLok Dovetail Composite Decks are available for free download on

Home Page

Easy Access to Design Tools by Vulcraft.

Vulcraft offers a number of easily-accessible tools to help you get the most out of your next project – from finding the right materials and product specifications to helping you create a design that works for your needs.