Final answer:
An access chamber is designed to provide easy entry for inspection and maintenance within drainage and sewage systems.
Step-by-step explanation:
An access chamber provides a convenient place for inserting inspection and cleaning equipment to clear the system. This element is crucial for maintenance purposes, allowing workers to reach blockages or areas requiring repair without the need to excavate the entire pipeline. It falls under the category of drainage and sewage system infrastructure commonly taught in high school engineering and technology courses.