Railex System 742 Two Tier Garment Storage Conveyor in High Value Commercial Storage Facility: Side View. This conveyor is 13’ tall and both tiers can hold items that are 6’ long. The conveyor is over 80’ long. The 742 is built into the clients pallet rack storage system. Railex built a control panel that works off either the slot location or the item number. The data is transferred in real time through a LAN to the client’s WMS database.