Reference to the Uniform Building Code shall refer to the Uniform Building Code, 1985 Edition ("UBC"). For purposes of this chapter, the applicable definitions in UBC Sections 2302 and 2312 shall apply:
.010 Essential building. Any building housing a hospital or other medical facility having surgery or emergency treatment areas; fire or police stations; municipal government disaster operation and communication centers.
.020 High risk building. Any building, not classified an essential building, having an occupant load of one hundred or more, as determined by UBC Section 3302(a).
Exception: A high risk building shall not include the following:
(a) Any building having exterior walls braced with masonry crosswalls or wood frame crosswalls spaced less than forty feet apart in each story. Crosswalls shall be full story height with a minimum length of one and one-half times the story height.
(b) Any building used for its intended purpose, as determined by the building official, for less than twenty hours per week.
.030 Low risk building. Any building, not classified as an essential building, having an occupant load of less than twenty occupants as determined by UBC Section 3302(a).
.040 Medium risk building. Any building, not classified as a high risk building or an essential building, having an occupant load of twenty occupants or more as determined by UBC Section 3302(a).
.050 Unreinforced masonry bearing wall. A masonry wall having all of the following characteristics:
(a) Provides the vertical support for a floor or roof.
(b) The total superimposed load is over one hundred pounds per linear foot.
(c) The area of reinforcing steel is less than fifty percent of that required by UBC Section 2407(h). (Ord. 5076 § 1 (part), November 14, 1989.)