Modern Steel Construction » Steel in the News » New Steel Joist Guide Now Available

Steel in the News

Back to all posts

New Steel Joist Guide Now Available
Posted by on September 28, 2007 at 12:03 PM.

The second edition of Technical Digest No. 3, now available from the Steel Joist Institute, aids design and construction professionals in selecting steel joists that meet stability requirements when water accumulation (ponding) on a flat or low-sloped roof is a design consideration. Much of the new information is a direct result of changes adopted by recent building codes.


This 44-page guide details the structural behavior of steel joists that may be susceptible to ponding conditions. It makes use of the standard load tables found in the SJI 42nd edition catalog to assist designers in complying with the Standard Specifications for Open Web Steel Joists, K-Series Section 5.10, Standard Specifications for Long-Span Steel Joists, LH-Series and Deep Long-Span Steel Joists, DLH-Series Section 104.11, and Standard Specifications for Joist Girders Section 1004.8. In addition, the benefits of camber and pitch of joists in reducing the effects of ponding are discussed.


Equations for the determination of reactions, equivalent uniform loads, and deflections for cambered joists subjected to water loads are included in Appendix A. A method for calculating the effective moments of inertia for standard SJI joist products is provided in Appendix B. Appendix C offers several design examples worked out in detail. When appropriate, the examples utilize the refined ponding criteria found in the 2005 AISC Specification for Structural Steel Buildings Appendix 2, Design for Ponding. Appendix D contains an extensive bibliography of journal articles, conference proceedings papers, research reports, and other publications related to ponding.


Technical Digest No. 3 sells for $25.00, plus $5.00 per order for regular handling and shipping within the continental U.S. To order a hard copy, download an order form, or download the document, visit

Bookmark and Share