Beam Classification — Member Extending Beyond Support Lines A beam that projects beyond one or both of its supports (i.e., the span continues past a support) is called:

Difficulty: Easy

Correct Answer: overhanging beam

Explanation:


Introduction:
Correct terminology for beam types is essential for selecting analysis models and detailing. This question differentiates among common classifications based on support configuration and span geometry.


Given Data / Assumptions:

  • Structural member behaves as a beam under transverse loads.
  • Part of the member extends past a support line.


Concept / Approach:
An overhanging beam is a simply supported beam with one or both ends projecting beyond the supports. This differs from a cantilever (fixed at one end, free at the other) and from a continuous beam (more than two supports within the clear span).


Step-by-Step Solution:
Identify support types: at least one simple support exists within the member length.Check geometry: the physical length exceeds the distance between the outer supports.Conclude: beam is “overhanging”.


Verification / Alternative check:
Classical beam catalogs and bending moment diagram shapes for overhangs (with negative end regions) corroborate the definition.



Why Other Options Are Wrong:

  • simply supported: does not necessarily project beyond supports.
  • fixed beam: both ends fixed; no overhang implied.
  • cantilever: fixed-free configuration, not supported inside the span.
  • continuous beam: has multiple interior supports, not merely an overhang.


Common Pitfalls:
Confusing the negative bending region near the overhang with a cantilever; the presence of an internal support distinguishes the two.



Final Answer:
overhanging beam

More Questions from Strength of Materials

Discussion & Comments

No comments yet. Be the first to comment!
Join Discussion