What is the minimum horizontal load that intermediate rails or balusters should withstand on an area equal to 1 square foot?

The correct answer reflects that the minimum horizontal load assigned to intermediate rails or balusters should be able to withstand 50 pounds. This standard is primarily established to ensure safety and integrity in guardrail systems, especially in places where children or pets might be present.

The requirement for 50 pounds is based on engineering principles that consider potential forces applied to the guardrails, ensuring they provide sufficient resistance to leaning or falling. This load rating is crucial for maintaining structural stability and protecting individuals from accidents, particularly in residential or public settings. Ensuring that intermediate rails and balusters can handle this specified load minimizes the risk of failure and enhances the overall safety of the building's design. The requirement is part of safety building codes intended to guide inspectors and builders in maintaining safety standards.