Onspot Welding & Design is a structural steel and ornamental ironwork contractor. For 18 years, Onspot has worked on both commercial and residential projects around Marin, Sonoma and San Francisco counties. Onspot's portfolio includes structural support beams, road bridge railings, stairways, decorative iron gates and ADA-compliant rails. The company's team of certified welders and artisans work closely with clients to produce original pieces.