Section 51.11. Story height

(a) A-1 occupancies shall be governed by the story height limitations in the following table:

Construction Type	Maximum Story Height
Fireresistive	No Limit
Noncombustible	1 Story
Protected Heavy Timber	1 Story
Ordinary	*Not Permitted
Wood Frame	*Not Permitted

(b) *A single story shall be permitted in ordinary or wood frame construction when the building is 1-hour rated construction or totally protected by an automatic sprinkler system.

(c) An additional story shall be permitted in noncombustible and protected heavy timber construction when the building is 1-hour rated construction or totally protected by an automatic sprinkler system. The maximum story height may be increased by two stories.

(d) Noncombustible, protected heavy timber, ordinary and wood frame construction types shall be considered 1-hour rated construction when bearing walls, columns, beams, other supporting members, ceiling/roof assemblies, floor/ceiling assemblies, stairways, and other openings through floors are of 1-hour rated construction.

(e) Basement areas shall be 1-hour rated construction up to and including the floor/ceiling assembly between the basement and the first floor.