Part 9 is a section of the Building Code dealing with small buildings, specifically with a footprint of 600 m2 or less and a height of 3 stories or less. Most single family residences fall under Part 9 of the BC Building Code. Part 9 is prescriptive. This means that the structural components are chosen from tables or by rules of thumb rather than by structural analysis. If a structural component cannot be found in Part 9 it falls outside of Part 9 and must be designed in accordance with Part 4.