, Safety Railings & Partitions - Material Handling Products No matter the size of your company or your space availability, National Material Handling Products Inc. has safety guard... rails, metal railing and indoor railing system barrier protection so strong it will stop a forklift in its tracks! Our safety railing is made of 4" schedule 40 pipe rail and 2-1/2... be combined to create custom lengths or configurations. Find safety railing that is reliable and constructed to withstand all kinds of barrier protection and security concerns...