ANS:C - 20

For normal cases, the stiffness of a simply supported beam is typically satisfied if the ratio of its span to its overall depth does not exceed: 20 Explanation:

• The stiffness of a beam refers to its ability to resist deflection under applied loads.
• A higher span-to-depth ratio generally indicates a more slender beam, which can result in greater deflections and lower stiffness.
• Limiting the span-to-depth ratio helps ensure that the beam remains sufficiently stiff to meet design requirements and performance criteria.
• While specific design codes and standards may vary, a common guideline for normal cases is to limit the span-to-depth ratio to around 20 to ensure adequate stiffness and structural performance. This guideline helps balance the requirements for strength, deflection control, and economy in beam design.