CONSTRUCTION CODES – 2009 International Residential Code & 2008 NEC Code and local amendments. 80% masonry construction, excluding windows and doors, unless the wall is a porch, patio, courtyard, or breezeway, in which event, the wall may be of non-masonry construction. Hardy plank or similar materials may be used for up to 50% of the masonry requirements. 2009 IRC narrow wall bracing requirements must be meet. Must use traffic rated cans in traffic areas. For inspection www.rockwall.com/buildinginspections/inpectionreq.asp.