Illinois Engineered Products (IEP) is your No. 1 Loss Prevention Solution. Provide a safer, better ventilated, and more secure location. Our 100% American-made galvanized steel folding gates are the strongest folding gates you can buy – and IEP manufactures the original Heavy Duty Galvanized Steel Folding Security Gates. They stand up to weather, rust resistant, and they look better and last longer! Our galvanized coating bonds to steel 10 times stronger than paint; that means our products are virtually maintenance-free. We also feature recycled materials in our extensive portfolio of products; many are stocked and ship right away!