Cantilevers

In addition to being designed for the moments and deflections in the span using the composite section for composite beams, beams with cantilevers are designed for the moments and deflections in the cantilever based on the bare beam section.

In the post-composite deflection calculations, I_eff is used along the whole span and I_x is used along the whole cantilever.

Note: If a significant portion of the span is in negative moment, the use of I_eff for the entire span may be unconservative.

The program assumes that the maximum cantilever deflection occurs at the cantilever end, and that the maximum cantilever moment and shear occurs at the support.

Cantilevers are not checked for the construction Dead Load only case.

See Unbraced Length for details concerning lateral bracing of members.

When cantilevers occur in the layout model, it is necessary to always have at least one beam framing into the cantilever end, unless the cantilever lies outside of the decked area.