What is the overhang measurement of the hip roof described in the text?

The overhang measurement of a hip roof is typically determined by the architectural design and practical considerations such as weather protection for the walls below and aesthetic appeal.

In this case, an overhang of 600 mm is a common and practical measurement for hip roofs. This length provides a good balance; it extends far enough to protect the walls from rain and direct sunlight while maintaining structural integrity without excessive weight or unnecessary complexity in the rafter framing. Additionally, a 600 mm overhang is generally manageable for roofing material installation, ensuring that the roof can effectively drain water and prevent moisture from accumulating at the eaves.

Other measurements, while they may be valid under certain conditions, either exceed typical practices or may not provide the same level of functionality or visual appeal as the selected measurement.