PART THIRTEEN - BUILDING CODE Chap. 1301. Ohio Building Code. Chap. 1309. Unsafe Structures. Chap. 1313. Housing Maintenance and Occupancy. Chap. 1317. Flood Damage Prevention. Chap. 1321. Design Review Regulations. Chap. 1325. Anti-Displacement and Relocation Assistance. Chap. 1330. Placement of House and Building Numbers.