An open parking garage of Type IIA construction must have an area of how many square feet per tier?

An open parking garage constructed under Type IIA construction must adhere to specific regulations concerning its size and tier area, which are dictated by building codes. In the context of this question, the correct choice regarding the maximum area per tier is 50,000 square feet. This limit is established to ensure that the structural integrity and safety of the building can be efficiently maintained while allowing for adequate spacing and circulation for vehicles and personnel.

Type IIA construction refers to non-combustible materials that allow for increased fire safety and durability, making larger areas feasible. The designation of 50,000 square feet aligns with code requirements, promoting both safety and functionality within the design of the parking structure.

To further contextualize this, the other choices present different area limits that would exceed the typical regulations established for Type IIA structures, potentially risking compliance with safety and design standards. Understanding the specific limitations for construction types is key for compliance and effective design in commercial building inspections.