Chapter 15.40 EARTHQUAKE HAZARD REDUCTION IN EXISTING UNREINFORCED MASONRY BEARING WALL BUILDINGS* This chapter is included in your selections. Sections: 15.40.010 Purpose. 15.40.020 Scope. 15.40.030 Definitions. 15.40.040 Material requirements. 15.40.050 Quality control. 15.40.060 Allowable design values. 15.40.070 Detailed systems design requirements. 15.40.080 Tables and standards. *Prior ordinance history: Ords. 3302 and 3464.