Egon
Epic Contributor
Ld1
thanks for the helpful explanation
Egon
Supports can fail in the technical sense in that they allow excessive movement, but they rarely completely fail.
Most rolled beams will fail in compression of the flange in the area of highest moment if loaded as a cantilever. The highest moment would be at the support closest to the water
Failure can also occur at the land side support if the connection is not properly anchored in the concrete as could happen if there is not sufficient steel - concrete contact which indicates a design would be required. A little different than the comment of covering the beam end with concrete and adding some rebar!
The two support system is actually a continuous beam with an extension on one end. Again different from a true cantilevered beam.