Businesses that require the services of local metal fabricators are generally those that are based upon engineering design, whether structural or mechanical. Once structural and mechanical designers receive approval of their designs from customers, the next step is to begin to purchase the equipment as outlined in the designs. Local metal fabricators generally receive copies of original designs and then determine the type of fabrication that will be required. Local metal fabricators create forms for structures or mechanical industrial equipment. Working from original design, metal fabricators begin to follow the specifications as drawn by designers. Local metal fabricators provide a custom-built service to their customers. For example, if a structure is designed with steel panel requirements, the metal fabricators will purchase materials such as 304 grade stainless steel, a fairly strong and durable gauge steel, that is used to fabricate the steel panels. In some cases, local metal fabricators are required to provide metal fabrication of duct work for large industrial facilities. In this case, galvanized steel may be the material of choice. Following the specifications of the original design, sheets of this material are sized, shaped and fabricated into long sections of duct work that meet design requirements. Its important, therefore, to choose local metal fabricators who possess a broad range of experience in metal fabrication for various types of industrial designs. Most local metal fabricators carry a special license and certification as well as municipality, county and state permits to operate a metal fabrication operation. Look for local metal fabricators with at least 3-5 years experience in metal fabrication and 5 years business reputation. This insures that the metal fabrication required will meet all safety and environmental compliance regulations. The local metal fabricator should also have experience in reading structural and mechanical drawings and determining specifications. Metal fabricator should have a broad knowledge of metal materials that will be used regularly in fabrication. They should also have a thorough knowledge of material substitutions that meet specifications.