Roots Steel International Company Ltd. RSI is an ISO 9001:2008 certified company, our corporate office is located in Jeddah – Saudi Arabia and we are operating in MENA region. RSI is engaged in Design, Fabrication, Erection of steel buildings, material handling system and general steel fabrication. RSI is providing a wide range of Structural steel services such as Architectural exposed structural steel as well as standard structural steel fabrication. RSI also specialize in providing high standard Pre-Engineered buildings.