Newly Revised and Expanded Guide About Structural Design of Steel Joist Roofs to Resist Ponding Loads
July 17, 2007
This Second Edition Technical Digest #3 from the Steel Joist Institute aids the design and construction professional in selecting steel joists that meet stability requirements when water accumulation (ponding) on a flat or low-sloped roof is a design consideration. This technical digest has traditionally been one of the most popular and useful publications offered by SJI. 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. The technical digest 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 Longspan Steel Joists, LH-Series and Deep Longspan Steel Joists, DLH-Series Section 104.11, and Standard Specifications for Joist Girders Section 1004.8.
The benefits of camber and pitch of joists in reducing the effects of ponding are discussed, and a technique that accounts for these benefits is shown.
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 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 #3 sells for $25.00, plus $5.00 per order for regular handling and shipping within the continental U.S.
To order a hardcopy online, to download an order form, or to download the document, visit www.steeljoist.org.
Besides setting standards for the steel joist industry, the Steel Joist Institute works closely with major building code bodies throughout the country helping to develop code regulations regarding steel joists and Joist Girders. The Institute also invests thousands of dollars in research related to steel joists and Joist Girders and offers a complete library of publications and other training and research aids. The Steel Joist Institute is a not-for-profit organization.
Company Name: Steel Joist Institute
Address 1: 3127 Mr. Joe White Avenue
City: Myrtle Beach
State: SC
Zip: 29577-6760
Country: USA
Phone: (843) 626-1995
URL: www.steeljoist.org
Contact Name: Elizabeth Hise
Organization: Hughes
Title: Channel Relations
E-mail: ehise@hughes-stl.com
