Final answer:
Cross braces are not considered a method of proper access as they are meant for stabilization of structures, not for access.
Step-by-step explanation:
The question asks which of the listed options is NOT an example of proper access. The options provided are ladders, cross braces, stair towers, and walkways. When considering proper access in the context of safety and construction, all except cross braces would be considered proper methods. Cross braces are not typically used as access points; they are used to stabilize structures.