SDI Member ANSI/SDI compliant
3" Composite Floor DECK
3" Composite Floor Deck is an excellent choice for floor systems requiring longer spans and greater load capacity. With a 3-inch depth and gauges ranging from 22 GA to 16 GA, it provides superior strength and durability. This deck meets SDI and ANSI standards and is available with galvanized finishes like G60 and G90 for enhanced corrosion resistance.
Strong, versatile, and easy to install. Perfect for your flooring needs.

Features
3" Composite Floor DECK Features
Optimize your projects with our 3" Composite Floor Deck, delivering unmatched strength, extended spans, and reliable concrete bonding. Perfect for heavy-duty, efficient, and sustainable floor systems.
Superior Load-Bearing Strength
Engineered to handle heavy loads, making it ideal for industrial applications and demanding construction environments.
Enhanced Structural Efficiency
Works in harmony with concrete to create a composite system, reducing floor thickness while maximizing strength.
Galvanized or Prime-Painted Finish
Choose G60/G90 galvanized or prime-painted finishes for enhanced durability and corrosion resistance.
Fire Resistance Compatibility
Supports fireproofing materials and fire ratings, offering enhanced safety for commercial and residential projects.
Compliance with SDI Standards
Meets Steel Deck Institute (SDI) and ANSI guidelines, ensuring quality and code compliance.
Extended Span Capability
The 3-inch profile supports longer spans, reducing the need for additional structural supports in large-scale projects.
Options
3" Composite Floor Deck Options
The 3" composite floor deck offers corrosion-resistant finishes and custom lengths (6′ to 40′) for long-span warehouses and distribution centers.
Finish & Material Options
Choose from our high-performance 50 KSI steel 3" Composite Floor Deck, available in galvanized finishes meeting SDI/ANSI standards, painted finishes for enhanced aesthetics, or bare steel for specialized applications. Each option ensures durability and reliable performance in diverse construction settings.
Request a Quote →Finish and Coatings
Choose from our high-performance 50 KSI steel 3" Composite Floor Deck, available in galvanized finishes meeting SDI/ANSI standards, painted finishes for enhanced aesthetics, or bare steel for specialized applications. Each option ensures durability and reliable performance in diverse construction settings.
Request a Quote →Custom Lengths
Whether you require precise deck lengths ranging from 6′-0″ for smaller projects or extensive spans up to 40′-0″ for larger constructions, we cater to all dimensions with precision and efficiency. Our custom length service is designed to meet your specific requirements, ensuring optimal fit and minimal waste.
Request a Quote →Specifications
Specifications of 3" Composite Floor Deck
Key details on strength, gauge, finish, and depth for the 3" composite floor deck
Dimensions and Profile Details
| Property | Details |
|---|---|
| Profile Depth | 3 inches |
| Coverage Width | 36 inches |
| Rib Spacing | 12 inches (center to center) |
| Rib Height | 3 inches |
The 3" Composite Floor Deck features a rib depth of 3 inches and a standard coverage width of 36 inches, designed for superior strength in heavy-duty composite floor systems. With rib spacing of 12 inches (center to center) and an overall material width of 36 inches, it ensures efficient overlaps and excellent concrete bonding. This profile is engineered for maximum load capacity and extended spans, making it ideal for demanding construction applications.
Gauge
| Gauge | Bare Steel Thickness (in) | Weight (lbs/sq ft) | Typical Applications |
|---|---|---|---|
| 22 | 0.0295 | 1.6 | Light-duty roofing and small spans. |
| 20 | 0.0358 | 2 | Medium spans, roofing, and siding. |
| 18 | 0.0474 | 2.6 | Heavy-duty applications. |
| 16 | 0.0598 | 3 | Heavy load spans. |
The 3" Composite Floor Deck is available in gauges ranging from 22 to 16, providing versatile options for different load and span requirements. Thinner gauges (22 and 20) are lightweight and economical, making them ideal for shorter spans and lighter loads. Thicker gauges (18 and 16) deliver increased structural strength, capable of supporting longer spans and heavier loads, ensuring reliability in more demanding applications.
Finish
| Finish Type | Details |
|---|---|
| Galvanized G60 | Zinc coating of 0.6 oz/ft². Recommended for general environments. |
| Galvanized G90 | Zinc coating of 0.9 oz/ft². Ideal for highly corrosive environments. |
| Prime-Painted | Provides a base coat for additional protection or paint adhesion. |
| Bare Steel | Unfinished; typically for indoor use or controlled environments. |
To ensure durability and long-term performance, the 3" Composite Floor Deck is available in multiple finishes, including galvanized (G60 and G90) and prime-painted. Galvanized finishes deliver superior corrosion resistance, with G90 offering higher zinc coating for environments with greater exposure to moisture or chemicals. The prime-painted option provides a protective base coat, ideal for projects requiring additional paint or coatings.

Installation
Installation Details and Guidelines
Essential practices for proper installation, attachment, and fasteners.
Standard Installation Practices
- 1Install the deck perpendicular to the supports.
- 2Weld or screw the deck at each support with puddle welds or TEK screws.
- 3Overlap sidelaps and secure with screws at 12" o.c.
Deck Attachment and Fasteners
- 5/8" Diameter Puddle Welds
- #10 TEK screws at 6" o.c. on edges, and 12" o.c. for sidelaps
- Sidelaps attached using #10 TEK screws at 12" o.c.
Applications
Applications of 3" Composite Floor Deck
With exceptional long-span capability, the 3" composite floor deck reduces column requirements and handles concentrated loads from heavy industrial equipment.

Long-Span Composite Floors
The 3" Composite Floor Deck is designed for long spans, reducing the need for columns. It enhances structural efficiency and supports heavy loads in warehouses, distribution centers, and large commercial spaces.
Read More →
Heavy Equipment Platforms
The 3" Composite Floor Deck creates durable platforms for heavy machinery. It handles concentrated loads and improves load distribution for industrial facilities and manufacturing plants.
Read More →Compliance with Standards
The 3" composite floor deck complies with SDI (Steel Deck Institute) specifications, ensuring high standards for design and performance.
Know More (sdi.org) →Delivery Areas
Cities Available for 3" composite floor deck delivery in 1 day
Fast, reliable delivery throughout Florida with nationwide shipping available.
North Florida / Panhandle
Southwest Florida
Central Florida
Space & Treasure Coasts
South Florida
FAQ
FAQs About 3" Composite Floor DECK
What is the primary purpose of the 3" Composite Floor Deck?
The 3" Composite Floor Deck provides exceptional structural support for concrete slabs, acting as permanent formwork and creating a composite system ideal for long spans and heavy loads.
What gauges are available for the 3" Composite Floor Deck?
It is available in gauges ranging from 22 GA to 16 GA, offering flexibility for various load capacities and structural requirements.
What finishes are offered for the 3" Composite Floor Deck?
It comes in galvanized (G60 or G90) finishes for corrosion resistance, prime-painted for projects needing additional coatings, and bare steel for specific applications.
Can the 3" Composite Floor Deck be customized to specific lengths?
Yes, it can be custom-cut to lengths ranging from 6'-0" to 40'-0", ensuring a perfect fit and reducing material waste on site.
Why choose the 3" Composite Floor Deck for large-scale projects?
Its deeper profile (3 inches) supports longer spans and heavier loads, making it the preferred choice for industrial facilities, warehouses, and multi-story construction projects requiring maximum durability.
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