Retractable Dock Barriers Dock Barrier | Load Bearing Safety Net | Dock Barrier Loading Dock Nets will stop a moving load. They provides a simple, cost-effective way to protect loading docks and other areas from personnel, light-duty pallet trucks and handcarts. Dock Barrier | Visual SB-3000 | Dock Barrier This visual dock barrier is one of our most popular models with a span of up to 13' SB-2000 | Dock Barrier This retractable dock barrier is made for openings larger than 13' wide. SB-4000 | Dock Barrier NEW! This visual dock barrier is an economical solution for up to 14' spans. Used extensively as an aisle barrier they are now becoming popular as a roll up dock barrier. SB-4000 | Portable Dock Barrier This portable dock barrier fence can be moved around as needed and the base plate requires no anchoring. Perfect for quick deployment and making many barrier shapes around dock bay openings.