Install frame construction walls to enclose existing porch area. No change in height or area of porch. No openings windows on walls constructed on property line or within three feet. Walls constructed on property lines to be built as a one hour rated wall, to consist of an exterior sheathing with a 1 2 hour rated exposure to flame, 2x4 studs, and 5 8 type x sheetrock on interior and stucco_-_exterior plaster. Installation of these materials shall be in compliance with astmc926 and astmc1063 and the provisions of this code. R703. 6. 1 lath. All lath and lath attachments shall be of corrosion- resistant materials. Expanded metal or woven wire lath shall be attached with 1-1 2-inch-long (38 mm), 11 gage nails having a 7 16-inch (11. 1 mm) head, or 7 8-inch-long (22. 2 mm), 16 gage staples, spaced at no more than 6 inches (152 mm), or as otherwise approved.