DPI was started in August 1986, and has over 25 years experience in the construction industry. DPI's primary function is involved with the sale and distribution of HEAVY STEEL CONSTRUCTION PRODUCTS.\r\nDiversified Product Industries is 100% minority-owned and certified as a Dis-Advantaged Business Enterprise (DBA)with the California Department of Transportation (D.O.T.), Los Angeles Metro Transit Authority (LAMTA), San Francisco Public Utilities Commission,lBay Area Rapid Transit (BART) and others. We look forward to fulfilling your steel requirements soon.