Triangle Rock Products Inc 3200 N San Fernando Rd Los Angeles, CA 90065 Phone : (323) 258-2777 Triangle Rock Products Inc Business Category Building Materials Concrete-Ready Mixed Asphalt & Asphalt Products Vulcan Materials Co 3200 N San Fernando Rd Los Angeles, CA 90065 Phone : (323) 258-2777 Vulcan Materials Co Business Category Stone Crushed Retail Concrete Aggregates (Wholesale) Crushed & broken stone Rock & Rock Products