The design strength of a guard should resist what amount of concentrated load applied at any point along the handrail or the top of the guard?

The design strength of a guard being required to resist a concentrated load of 200 pounds at any point along the handrail or the top of the guard is based on safety standards established for the protection of individuals using stairways, balconies, and other elevated surfaces. This requirement is intended to ensure that the guardrail system is robust enough to prevent accidental falls and to provide a reliable barrier.

The 200-pound load specification is rooted in engineering principles that account for various factors, including the weight and force exerted by individuals leaning against the guard, pushing on it, or during any unexpected movement near the edge. It effectively covers the average force exerted by users in real-life situations, enhancing safety for all individuals within the space.

In contrast, lower weight limits may not sufficiently account for the stresses involved in typical usage scenarios, potentially leading to inadequate protection and increased risk of injury. Thus, the emphasis on a requirement of 200 pounds reinforces the necessity for guard systems to have a strong and resilient design to safeguard against both intentional and incidental loads.