Final answer:
Categorizing a building by its use helps forecast maintenance costs and potential fire concerns.
Step-by-step explanation:
When categorizing a building by its apparent use, the purpose is to forecast the maintenance costs and potential fire spread and collapse concerns that may lie within. For example, a warehouse would have different maintenance costs and fire concerns compared to a historical building. By categorizing buildings based on their apparent use, architects and designers can better anticipate and plan for these factors.