FAQ

What is the CSDMA?

The Canadian Steel Door Manufacturers Association (CSDMA) was established in 1974 to set standards and specifications for the manufacture and installation of steel doors, frames, and related components. These guidelines assist specifiers, end users, AEC professionals, and those involved in the construction industry.

CSDMA members are leading manufacturers in the industry, recognized internationally for producing high-quality products at competitive costs. Their diverse range of products consistently meets the needs of architects and engineers. You can see a list of commonly requested products and manufacturers on our Commercial Steel Doors & Frames Products page. You can also visit our Members Directory page for a list of certified manufacturers.

How does CSDMA develop its standards?

The CSDMA standards, available on our Publications & Resources page, have been developed over time by its members, based on industry experience and industry-related independent agency data. These standards represent best practices rather than the lowest or weakest acceptable product specifications.

Are hollow metal products recyclable?

Yes. Steel frames and doors with honeycomb, polystyrene, polyurethane, and steel-stiffened cores are recyclable.

What is the purpose of the seamless door edge options?

There are two reasons for filling lock seam door edges. Simple filling is for aesthetic purposes, while intermittent tack-welding with filler and dressing enhances both durability and appearance. Continuously welded door seams provide additional strength while maintaining a clean look.

What is Galvanneal and what are its advantages?

Galvanneal is a zinc-iron coating applied to steel by the manufacturer. This coating, present on both sides of the steel sheet, protects against moisture, preventing rust under proper installation, handling, and storage conditions. When clean and dry, it allows for direct on-site painting without the need for priming.

Is the Fire Labeling Guide comprehensive?

The Fire Labeling Guide provides a reference for architects and designers regarding fire-rated products within the industry. If a specific product is not listed, manufacturers can be contacted for additional fire-rated product options. CSDMA members may also offer products tested by a different agency, beyond those included in our guide.

Do fire-rated doors require wire glass?

No. While wire glass can be used, any fire-rated glass that meets or exceeds the door's fire rating is acceptable.

Can thermally broken frames be fire-rated?

No. Thermally broken frames contain a plastic divider that separates the interior and exterior portions of the frame to reduce heat transfer. Since most exterior openings do not require fire ratings (with some exceptions), thermally broken frames are not fire-rated.

Can a steel frame with a thermal break have a fire resistance certification?

No, a steel frame with a thermal break cannot be fire certified.

Can wooden molding be applied to a fire-rated steel frame without affecting its certification?

No. Covering a steel frame with wood molding is not allowed unless the specific configuration has been tested. Laboratory tests show that heat transfer from the steel can ignite the molding, even if it is not directly exposed to the fire.

What is the maximum allowable louver size in a fire-rated door, and what is the maximum fire rating possible?

The maximum allowable louver size is 24" x 24" per door leaf, positioned in the lower part of the door only. The maximum fire resistance rating for louvered doors is 90 minutes, and no glass openings are permitted.

Can a 1” diameter hole be drilled in a fire-rated steel frame on-site for architectural hardware installation?

Yes. According to NFPA 80, installers can drill 1" diameter holes in fire-rated assemblies to install approved fire-rated hardware without affecting the assembly’s certification.

Can an oversized door be fire-labeled?

If the door exceeds the manufacturer's listed dimensions, a standard fire label cannot be used. However, if the oversized door is built to the same fire-rated specifications, it may receive an "oversized fire door" label (NFPA 4.2.1.6, 4.3.9, A.4.3.9).

Is there such a thing as a thermally broken door?

No. Currently, no hollow metal manufacturer produces a thermally broken door. While some doors have insulation for energy efficiency, they are not thermally broken.

What is the purpose of holes in door end channels?

During a fire, the core material inside the door burns, producing gases. If these gases are trapped, they create internal pressure that could cause the door to fail as a fire barrier. The holes in the end channels allow these gases to escape, preventing failure.

Is grouting required for fire-rated frames?

No. Grouting is not required for commercial or residential fire-rated frames. Proper anchoring is sufficient for stability, and dry, non-combustible materials may be added on-site for soundproofing. However, grouting is mandatory for security and detention applications.

When grouting is specified, water-based grout and materials containing antifreeze should not be used, as uncured portions can cause corrosion and void warranties. Only naturally curing grout should be used.

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