What is the recommended action when there is too much dynamic deflection between railing and posts?

• A. Reduce the length of the railing
• B. Install additional posts
• C. Use a heavier material for the railing
• D. Increase the height of the railing

Answer: (B)

The recommended action of installing additional posts is correct because increasing the number of supports for the railing can help manage and control dynamic deflections more effectively. Dynamic deflection refers to the bouncing or swaying movement that occurs in a railing when subjected to dynamic loads, such as wind or the forces exerted by pedestrians and vehicles. By adding more posts along the length of the railing, you create closer points of supports which reduces the span between the posts. This shorter span helps to distribute loads more evenly and diminishes the amplitude of deflections.

While reducing the length of the railing, using a heavier material, or increasing the height could potentially impact the overall performance or aesthetics of the railing system, they do not directly address the core issue of excessive dynamic deflection. Additional posts directly enhance structural stability and reduce movement, making it the most effective method in this scenario.