What is the required width for platforms or walkways according to safety regulations?

The correct answer reflects the safety regulations that mandate walkways or platforms to be a minimum of 18 inches wide. This width is crucial for ensuring that individuals can walk safely without risking their balance or the chance of falling off. A space of at least 18 inches allows for the passage of personnel while also accommodating necessary equipment, tools, or materials that may need to be carried on the walkway.

Additionally, this width helps to comply with safety standards designed to minimize workplace hazards, promoting efficiency and safety on residential construction sites. A walkway narrower than this could lead to unsafe conditions, as individuals may struggle to navigate through tighter spaces, especially when carrying items or working in groups.

The other options, while suggesting a range of widths, do not meet the minimum standard set forth by regulations, which is why they are not considered correct. The specified measurement of 18 inches strikes a balance between safety, practicality, and compliance with common industry standards.