In non-Group R occupancies, what is the maximum horizontal area in square feet for attics and concealed roof spaces that requires draftstopping?

In non-Group R occupancies, the maximum horizontal area for attics and concealed roof spaces that requires draftstopping is 3,000 square feet. Draftstopping is essential for limiting the movement of smoke and heat during a fire, which is why building codes set specific area limits.

When attics or concealed roof spaces exceed this area, it becomes crucial to install draftstopping to compartmentalize the space. This practice helps in managing potential fire spread and allows for more effective fire control measures by restricting smoke migration.

Understanding these limits and regulations is vital for ensuring safety in commercial buildings, as it directly affects how buildings are designed and occupied.