Type 1 Individual dwellings with predominant use as a single-family housing unit. Generally small single-story buildings, however in some cases such buildings may be more than one story
Type 2 Three stories and below (ground floor and no more than two stories above) with fully open to exterior air corridors
Type 3 Three floors and below (land floor and no more than two floors above) with closed corridors. All or a substantial part of the corridors are closed and not open to outside air
Type 4 Four floors and above (ground floor and three or more floors above) with fully open to exterior air corridors
Type 5 Four floors and above (ground floor and three or more floors above) with closed corridors. All or a substantial part of the corridors are closed and not open to outside air