SJI Membership

To inquire about membership, contact the Steel Joist Institute at 843-407-4091.

SJI membership is open to manufacturers who continuously produce joists and/or girders that belong to the K-, LH- or DLH- Series and conform to the Institute's specifications and load tables. The requirements for each series differ, as described below.

Applicants with K-Series Joists

The Institute's consulting engineer checks to see that designs conform to the specifications and load tables. This consists of an examination of (1) complete engineering design details and calculations of all K-Series Joists, bridging and accessories for which standards have been adopted; (2) data obtained from physical tests of a limited number of joists to verify conclusions from analysis of the applicant company's engineering design, details and calculations.

An initial plant inspection and subsequent periodic inspections are required to ensure that the applicant/member company possesses the facilities, equipment and personnel required to properly fabricate the K-Series Joists.

Applicants with LH- or DLH-Series Joists or Joist Girders

The Institute's consulting engineer checks designs. Periodic in-plant inspections are required, but physical tests are not.

Responsibility for Product Quality

Plant inspections are not a guarantee of the quality of any specific joists or Joist Girders. This responsibility lies solely with the manufacturer.

Services to Non-Members

The Institute's facilities for checking the designs of joists or Joist Girders are available on a cost basis.

The Steel Joist Institute does not check joist designs for specific construction projects. Fabrication to SJI specifications is the responsibility of the manufacturer.

View a map of current members.