R602.3.1 Stud size, height and spacing.The size, height and spacing of studs shall be in accordance with Table R602.3.(5). Exceptions: 1. Utilitygradestudsshallnotbespacedmorethan16 inches(406mm)oncenter,shallnotsupportmore thanaroof andceiling, andshall notexceed 8feet (2438 mm) in height for exterior walls and load-