What is the height of the top handrail not intended to protect from greater heights?

The height of the top handrail designed to protect from falls is generally established by safety regulations and building codes to ensure maximum safety for individuals. The correct answer of 900 mm aligns with standard practices in construction and safety design.

This measurement is based on recommended guidelines intended to provide effective fall protection while still being within a comfortable reach for most people. A top handrail at 900 mm helps maintain stability and support for individuals near elevated edges, such as staircases or balconies, without adding undue strain when reaching.

Understanding these measurements is essential not only for compliance with laws but also for protecting the safety and well-being of users. The other height options either exceed the commonly accepted standard or fall below the minimum requirements for effective safety measures.