4-1-7: EXTERIOR WALLS AND ROOFS:
A minimum grade of 4-ply plywood (3216 span rating) or OSB particleboard (3216 span rating) with an "APA Grade" stamp shall be required for new construction of exterior walls and roofs in all residential dwellings, attached garages or commercial structures. This minimum grade requirement does not apply to incidental or accessory buildings or detached garages. (Ord. 1169, 11-11-2012)