When selecting a metal deck supplier, quality, safety, and reliability are critical factors that should never be compromised. Choosing an SDI member company ensures you receive metal decking manufactured to the highest industry standards. CSM Metal Deck is proud to be an SDI-certified supplier, meaning our products meet strict performance and quality requirements, offering unmatched value to our customers.
Why SDI Certification Matters

The Steel Deck Institute has set industry standards for steel deck manufacturing since 1939. Becoming an SDI member is no small feat—companies must adhere to rigorous material and performance standards to maintain certification. SDI membership ensures that:
- The metal deck is manufactured from high-quality, prime structural steel coil.
- The deck meets or exceeds ANSI Standards for Cold-Formed Metal Framing.
- Products are regularly audited and tested to guarantee consistent quality and performance.
- Each piece of metal deck can be traced back to its original steel coil, ensuring accountability and transparency.
By choosing an SDI-certified supplier like CSM Metal Deck, you are investing in metal decking that has been rigorously tested for strength, durability, and long-term reliability.
Additional Certifications for Performance and Safety
At CSM Metal Deck, we take our commitment to quality a step further. In addition to being an SDI-certified manufacturer, our products are also UL Certified and FM Approved, reinforcing their safety, reliability, and performance.
UL Certification

Underwriters Laboratories (UL) certification is one of the industry’s most respected marks of safety and quality. UL-certified metal deck ensures compliance with strict fire resistance and structural integrity standards, providing an extra layer of confidence for builders, architects, and engineers.
Our UL Approved products include:
UL Approved Floor Deck
- 1 ½” Composite
- 2” Composite
- 3” Composite
UL Approved Roof Deck
- 1 ½” B-Deck
- 3” N-Deck
Learn more about our UL Approved metal decking products.
FM Approval

CSM Metal Deck’s FM Approved products meet Factory Mutual’s stringent standards for wind uplift resistance and fire protection. Our roof deck has been approved per FM 4451 for use in Class 1-60, 1-75, and 1-90 wind uplift designs for insulated roof construction. This means our metal decking has been tested to withstand extreme weather conditions, reducing the risk of property loss and structural failure.
Our FM Approved products include B-Deck, N-Deck, and Interlocking N-Deck. They are available in gauges from 22 ga. to 16 ga.
These products are tested and approved to provide superior protection against wind and fire hazards.
FM Approval is more than just a certification—it’s a guarantee that our products have undergone real-world testing to meet the highest safety and performance standards.
Read our article on our FM Approved metal decking products for more information.
Engineering Expertise and Support
Another key advantage of working with an SDI-certified manufacturer is access to expert engineering support. SDI members either have in-house engineering teams or collaborate with experienced professionals to provide:
- Guidance on metal deck selection and specification
- Assistance with complex project designs
- Recommendations for installation best practices
At CSM Metal Deck, we work closely with industry experts to ensure our products contribute to safer, more efficient, and long-lasting construction projects.
The CSM Metal Deck Advantage
At CSM Metal Deck, we provide superior metal decking solutions that meet the highest industry standards. Our certifications reflect our unwavering commitment to quality, safety, and performance. You can trust that our products are tested and verified to perform under the most demanding conditions.
Why Choose CSM Metal Deck?
- SDI Certified: Guaranteed industry-standard quality
- UL Certified: Ensuring safety and fire resistance
- FM Approved: Verified for wind uplift and fire protection
- Expert Engineering Support: Assistance with design and installation
When you choose CSM Metal Deck, you choose a supplier prioritizing quality, safety, and customer satisfaction.
Contact Us
If you’re looking for a reliable, SDI-certified metal decking supplier, CSM Metal Deck is here to help. Contact us today to learn more about our certified products and how they can enhance your next project.