This polygon dataset represents snow load designations in Shasta County, California for 2007. "Snow load" is an engineering requirement for truss calcs, overall roof load, etc., "Snow load" attribute represents pounds per sq. ft. of roof area. The “Manuf home” attribute represents pounds per sq. ft. of roof area for manufactured homes” (mobile homes) in those locations. More information about snowload requirements can be found at http://www.co.shasta.ca.us/index/drm_index/bldg_index/bldg_permit.aspx