Cantilever beams have support on one end only. the deflection for beams varies by size, material and length. An example of a cantilever beam is a horizontally mounted flagpole that is attached to the side of a building. Cantilever construction needs no external bracing for certain overhanging structures. Beam deflection is a complex mathematical formula that shows length and load distribution.
. More about deflection and the mathematical formula to determine it can be found on this website http://physics.uwstout.edu/statStr/statics/Beams/bdsnp412b.htm.
