In single shaft systems, where is the key way available?

In single shaft systems, the key way is available on every floor because the design and functionality require accessibility to systems such as wiring, plumbing, or HVAC (heating, ventilation, and air conditioning) that typically span all levels of a building. The key way serves as a crucial conduit or space that allows for the installation and maintenance of these systems while ensuring compliance with safety and building codes. This widespread availability facilitates efficient operation and access for repairs or modifications without needing to restrict work to just one area, hence its presence on each floor is essential for comprehensive serviceability throughout the structure.