Development Advance Solution 

Established in 1996 and based in Hwasun-eup, South Korea, Development Advance Solution Co.,Ltd. (DAS) specializes in the installation of steel frameworks and a wide array of related products across various sectors. Their extensive portfolio for road safety facilities includes diverse guardrail systems such as W-type, thrie beam, dual strength, and open beam designs, along with bridge and bikeway barriers, steel frame retaining walls, and crucial performance test data. For acoustic solutions, DAS offers sound-absorbing, wooden, and transparent soundproof panels, as well as innovative solar power noise enclosures. The company also supplies polyurethane boards for insulation needs. A significant area of focus for DAS is renewable energy, where they provide comprehensive services encompassing project development, engineering, material procurement, construction, and ongoing operation and maintenance. This includes expertise in renewable portfolio standard systems, photovoltaic soundproofing tunnels, and specialized mounting structures. Additionally, DAS offers a variety of general construction materials, such as easy steel decks, plywood, and insulation decks. Their offerings further extend to environmental products like water purification systems, wooden debris barriers, and wooden decks, alongside building finishes including clay bricks and terracotta exterior materials. The company was previously known as Dong-a Steel Technology Co.,Ltd.