During the 1970-80’s most states adopted building codes that required structures to support the weight of the building materials (dead load) and the weight of the snow, ice, water, people, etc. (live load). By the year 2000, international building codes were universally adopted with similar standards. So, if the structure was built post 1975, you most likely will not have any weight problems. In some cases, structural engineers can take deductions assuming snow shedding off a structure, particularly with large sloped metal roofs. Large sports arenas, hospitals, schools and other structures with high occupancy and liability should be reviewed by a licensed structural engineer. For more information on this topic please call us at 877-290-8669.