February 14, 2019
Out of Plane Design Checks on Column Web Connections
The AISC 360-16 (15th edition) has added a new section (see page 9-14 through 9-17) that gives direction on how to check the out-of-plane loading on the webs of wide flange columns which are subject to axial and/or bending loads. This applies to shear tabs, double angles and gusset plates attached to wide flange column webs.
RISAConnection v10 now incorporates these changes as required by the code for the following connection types:
- Column to Beam Clip Angle (One Side) Shear
- Column to Beam End Plate Shear
- Column to Beam Shear Tab Shear
- Vertical Diagonal Brace – Gusset to Column
- Vertical Diagonal Brace – Beam to Column
- Knee Brace
In the case of moment connections, if the plate connects to the column web, there are transverse stiffeners on the opposite side of the column that are required and prevent out of plane bending. If the plate does not connect to the column web, then there is no axial load present in the column web.
For each shear and brace connection where the out-of-plane web checks are required, the following limit states are now included:
- Column Web Punching Shear
- Column Web Axial Yielding
- Column Web Flexural Yielding
- HSS Transverse Plastification (only required for HSS Tube columns)
- HSS Flexural Plastification (only required for HSS Tube columns)
Additionally, RISAConnection v10 offers the user the ability to include these out-of-plane web checks for older versions of the AISC codes as well.
For more information about the updates to the AISC 360-16 (15th Edition), refer to the comparison document on the AISC’s website found in the link below: