Point of Contraflexure

# If the end portion of a beam extends beyond the support, the beam is known as overhanging beam.

Overhanging Beam

# In overhanging beams, the Bending Moment* is positive between the supports, whereas the Bending Moment is negative for overhanging portion.

# At some point on the beam, the B.M is zero after changing its sign from positive to negative or vice-versa.

# That point is known as the point of inflexion or point of contraflexure.

Note:

* Bending Moment (B.M): Algebraic sum of the moments of all the forces acting to the left or right of the section gives bending moment.