Jennmar Corporation develops and manufactures ground control products for mining, tunneling, and civil construction industries. It offers primary roof/rib support and rock reinforcement products, such as bendable bolts, cable bolts, spring-loaded shells, combination bolt systems, conventional bolts, cuttable and corrosion resistant products, headed rebar bolts, bolt anchor systems, roof bolt re-tensioning systems, thread bars, tensioned rebar bolts, truss systems, and yielding rock bolts; and standing support products, which include impact resistant lagging steel structures, pumpable cement an...d containment bags, standard props, yieldable props, hydraulic props, overcasts, and rapid installation props. The company also provides surface/skin supports and accessories, including belt hangers, channels, mats, beams, meshes, galvanized and coated products, plates, and rail ties; resin and pumpable cement products, such as pumpable cribs, foaming cements, polyurethane resins, and polyurethane resin groutings; and engineering and fabrication services. Jennmar Corporation was formerly known as Frank Calandra, Inc. and changed its name to Jennmar Corporation in 1965. The company was founded in 1922 and is based in Pittsburgh, Pennsylvania with manufacturing plants in South Africa, Australia, Spain, China, Per, Chile, Mexico, Czech Republic, Poland, and the United States.
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