ANS:C - cantilever beam

The stiffness of a beam is an important factor in determining its structural performance, particularly in resisting deflections under load. When the ratio of the span to the overall depth does not exceed 10, it typically indicates a relatively short and stout beam. In such cases, the stiffness of the beam is ordinarily satisfactory for various loading conditions.

• Simply Supported Beam:
• In a simply supported beam, the ratio of span to depth is an important consideration for determining deflections and overall stiffness. If the ratio does not exceed 10, the stiffness of the beam is generally satisfactory. This is especially true for shorter spans where the beam is adequately supported at both ends.
• Continuous Beam:
• Continuous beams are supported at more than two points along their length. The ratio of span to depth is still an important factor in determining stiffness. If this ratio does not exceed 10, the beam is typically considered to have satisfactory stiffness, particularly for shorter spans.
• Cantilever Beam:
  • Cantilever beams are supported only at one end, with the other end projecting freely. While the stiffness of a cantilever beam is influenced by various factors including its length and depth, the ratio of span to depth exceeding 10 may be less critical due to the different loading conditions experienced by cantilever beams.