Steel framing
How to Read Cold-Formed Steel Member Designations
Decode steel framing member names, separate profile dimensions from thickness, and identify the extra information a complete material order still needs.
Break the designation into meaningful groups
Common cold-formed steel designations combine numbers and a profile letter. The first number describes nominal web depth, the letter identifies the section family, the next number describes flange or leg width, and the final number identifies thickness designation. The dimension groups use hundredths of an inch; the thickness group uses a mil designation.
The system gives teams a compact reference, but proprietary profiles may use additional naming conventions. Read a manufacturer's key whenever a suffix or product name is unfamiliar.
References: How to order cold-formed steel framing
Work through one identification example
For identification only, consider 600S162-54. The groups refer to a nominal six-inch stud-family web, a flange designation corresponding to approximately 1-5/8 inches, and a 54-mil thickness designation. This example is not a member recommendation or a statement of allowable loading.
| Group | Describes | Still verify |
|---|---|---|
| 600 | Nominal web-depth designation | Actual product geometry and tolerances |
| S | Stud-family section | Application and profile details |
| 162 | Flange-width designation | Return lip and full section drawing |
| 54 | Thickness designation | Minimum and design thickness in product data |
References: Product identification and thickness designations
Separate a section name from a piece mark
A section designation describes a member type. A piece mark identifies a particular fabricated or scheduled item. Multiple piece marks may use the same section but have different lengths, holes, end cuts, or destinations. Keep these two fields separate in the takeoff.
For instance, a project may use one stud section in both ordinary wall fields and opening assemblies. The common section name does not tell receiving personnel which bundle belongs at an opening. Add the wall or assembly mark and finished length so the instruction remains usable after delivery.
Know what the designation leaves out
A compact member name does not necessarily contain the steel grade, protective coating, delivered length, punching arrangement, or project-specific approval. Those requirements belong in the same line item or in a clearly referenced specification. Do not ask a supplier to infer them from the section code.
Where a proprietary suffix appears, preserve it exactly until its meaning is confirmed. Removing a suffix to make a spreadsheet look cleaner can erase a distinction that matters to fabrication or performance. Use a separate plain-language description rather than editing the formal identifier.
- Steel grade and specified coating.
- Piece length and any approved end treatment.
- Factory punchouts, custom holes, or unpunched condition.
- Quantity, bundle destination, and piece mark.
- Drawing revision and accepted manufacturer/product reference.
Reconcile drawings, quotes, and bundle labels
Create a three-column check showing the specified section, the quoted section, and the delivered marking. Differences become much easier to resolve when all three are visible in one place. Include the original document page or drawing reference beside each entry.
If the numbers appear inconsistent, first check units and terminology. A rounded thickness designation is not the same field as the published design thickness. Then check whether the offered item is a proprietary profile, a different flange width, or a proposed alternate that has not yet been reviewed.
Use a readable ordering format
Write the full designation first, followed by length, quantity, and the remaining specified attributes. Add location information when it helps material control. Keep unresolved fields visibly marked as questions and remove provisional assumptions before purchase release.
This format lets a supplier discuss availability without changing the technical description. If a different product is offered, it can be reviewed as an explicit alternate instead of becoming an unnoticed abbreviation change.
Common questions
Does a stud designation include the member length?
Usually the section designation does not provide the delivered piece length. State length separately and distinguish stock length from any approved finished cut length.
Can I compare two products using only the final thickness number?
No. Compare the full geometry, material properties, coating, application, and supporting product information. Equal thickness designations do not make different shapes interchangeable.
Sources & further reading
Use the current documentation for the exact product and project. Source links do not imply a partnership or endorsement.
- How to order cold-formed steel framing SFIA / BuildSteel
- Product identification and thickness designations ClarkDietrich
Prepared with AI assistance. Linked references require current project-specific review. How these guides are prepared.
Prepare a supply inquiry
- Record the project drawing or detail and the specified product, profile, or system.
- List the complete configuration, physical units, quantities, and cuts per piece.
- Request current manufacturer documents; confirm compatibility, price, and availability before ordering.
- Obtain the responsible professional's review for loads, code requirements, or installation.