Identify Existing Joists

Are you trying to identify an existing joist found in the field? Fill out the Joist Investigation Form below or use this downloadable form. Please fill out as much information as possible. This will help the SJI office in making an approximation for the joist size you submitted when comparing it to our extensive archived material.

When filling in the form regarding the joist chord and web member properties, it is recommended that the field measurements be taken with a micrometer rather than a tape measure since thicknesses can vary by as little as 1/64 of an inch.

By submitting this form you accept and agree to the SJI Disclaimer.

SJI Resources

The Steel Joist Institute offers a robust library of articles, publications, webinars and design tools to assist you in your next project.

Contact Us

Need additional information or assistance with steel joists? Contact the Steel Joist Institute.

Applications of Steel Joists

View projects featuring steel joists, Joist Girders and composite steel joists.