Which type of building construction generally does not exceed four floors?

Type 3 construction, often referred to as "Ordinary Construction," is characterized by walls made of non-combustible materials, but the interior structural elements such as floors and roofs can be made of combustible materials. This type of construction is typically limited to a maximum of four stories due to safety concerns regarding fire spread and the structural integrity of the building. The limitation is set to ensure that the risk of fire is contained, given the use of combustible materials in its interior framework.

Type 1 construction represents buildings made with non-combustible materials, which can often exceed four stories due to their enhanced fire-resistance. Type 2 construction is also made with non-combustible materials but allows for some combustible elements; these buildings can also exceed four stories. Type 4 construction, or "Heavy Timber" construction, involves substantial wooden elements and is generally not limited to four stories, though it provides certain benefits due to its type of material. Therefore, Type 3 construction's design and regulations primarily align with a four-story limitation, emphasizing fire safety considerations.