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

The bottom handrail, typically referred to in building regulations, is designed primarily to provide safety at lower elevation levels rather than to prevent falls from significant heights. The correct height of 700 mm aligns with standard building codes that specify appropriate heights for handrails on stairs or along walkways. This height allows for effective support and safety for individuals while not being excessively high, which would not serve its intended purpose in locations where falls from height are not a concern.

In the context of other options, a height of 800 mm or above may surpass the requirements for areas that are not at risk of falls from great heights. Meanwhile, a height of 600 mm or 500 mm would be insufficient for proper support and could lead to safety issues, depending on the use of the space. Thus, the specified height of 700 mm ensures compliance with safety standards while accounting for the specific use case of the handrail intended for lower elevation safety.