Engineering FAQs

5.3.4. What is shear lag and when must it be considered?

Shear lag describes behavior at an end connection of a tension member where some but not all of the cross-sectional elements are connected; the area that is effective in resisting tension may be less than the full calculated net area. Procedures for treatment of shear lag and determination of the effective net area in bolted and welded connections are provided in the 2005 AISC Specification Section D3.3. Alternatively, shear lag concerns can be addressed by selecting a connection length that mobilizes the entire load-transmitting capability. An article by Cheng and Kulak (2000) discusses shear lag considerations in round hollow structural section members.

last modified 1 January 2006