A fence section includes an upper horizontal rail, a lower horizontal rail, and vertical members. At least one of the vertical members is connected to the upper horizontal rail by an upper connection system and to the lower horizontal rail by a lower connection system.

A fence section includes an upper horizontal rail, a lower horizontal rail, and vertical members. At least one of the vertical members is connected to the upper horizontal rail by an upper connection system and to the lower horizontal rail by a lower connection system.

A fence section includes an upper horizontal rail, a lower horizontal rail, and vertical members. At least one of the vertical members is connected to the upper horizontal rail by an upper connection system and to the lower horizontal rail by a lower connection system.

Border walls and related systems and methods are disclosed. A border wall may include a plurality of bollard fence sections adapted for engagement with corresponding base members. Each fence section may include a plurality of bollards. Each base member may include a plurality of openings extending downwardly from a top surface of the base member partially into the base member. The openings in the top of a base member are adapted for engagement with individual corresponding bollards on a bollard fence section. At least one of the bollards is matched to a corresponding opening in the base member so that the matched bollard, when inserted into and engaged with its corresponding matched opening, may function to support and/or align the bollard fence section. The base members may also include connectors, and/or mating alignment notches and protrusions, to facilitate joining and/or leveling of the base members to form a stable wall.

A fence section includes an upper horizontal rail, a lower horizontal rail, and vertical members. At least one of the vertical members is connected to the upper horizontal rail by an upper connection system and to the lower horizontal rail by a lower connection system.

A method of installing a reusable security barrier is presented that allows quick installation and removal. In one embodiment, the method comprising providing precast concrete panels having a rectangular profile elevation, digging a trench having a length equal to or longer than the panel width, lifting and placing the panel such that a portion of the panel is inserted inside the trench and a portion extends vertically upward from the trench forming a barrier, with a narrow opening between the panels, and filling and packing the trench unfiled by the panels with a filler to provide a solid foundation. The method can comprise utilizing multiple panels placed side edge to side edge with their bottom inserted inside a trench to form a longer barrier. The method can further comprise removing the panels from the trench for reuse in a second site when the original security barrier is no longer needed.

A fence section includes an upper horizontal rail, a lower horizontal rail, and vertical members. At least one of the vertical members is connected to the upper horizontal rail by an upper connection system and to the lower horizontal rail by a lower connection system.

A fence section includes an upper horizontal rail, a lower horizontal rail, and vertical members. At least one of the vertical members is connected to the upper horizontal rail by an upper connection system and to the lower horizontal rail by a lower connection system.