Profile: Modular Access Systems, LLC services unloading and loading rack needs. Our loading platforms, racks, safety bridges and gangways are designed to fit rail car & truck loading & unloading requirements. Our products include loading arms, swivel joints, trolley beam lifelines, anchor points, rail gates, metal and polymer track pans. We supply top, bottom and vapor recovery loading arms for loading racks & platforms. We sell many different configurations of both bottom and top loading arms. Each of these comes in various sizes and can be manufactured out of different materials including carbon, stainless steel, aluminum & ductile iron.