Since 1948, barkman has manufactured precast concrete products for residential, commercial, agricultural and municipal applications. Our product line includes a wide selection of concrete pavers, retaining walls, paving slabs, septic tanks, steps and site furnishings. We also manufacture components for skate parks, as well as specialty products for the agricultural ma ...rket (precast flooring and feeders for hog and dairy barns) and the transportation and utility industries (concrete trenching for electrical and plumbing systems). We can even produce custom precast products for just about any need.