Border walls and related systems and methods

A base member adapted for engagement with a bollard section, the bollard fence section including a plurality of left bollards, a match bollard having a square shape, and a plurality of right bollards, the match bollard being positioned between the plurality of left bollards and the plurality of right bollards, the plurality of left bollards, right bollards, and the match bollard having approximately the same size square cross section, the base member comprising:

• a precast concrete base in the form of a rectangular prism and having a top surface, a front side surface, a back side surface opposite the front side surface, a left end surface, and a right end surface opposite the left end surface;
• and
• a plurality of left generally circular openings extending downwardly from the top surface of the base, a square opening extending downwardly from the top surface of the base, and a plurality of right generally circular openings extending downwardly from the top surface of the base, the number of left generally circular openings in the base being less that the number of right generally circular openings in the base, the square opening being positioned between the plurality of left generally circular openings and the plurality of right generally circular openings, and the diameter of each of the left generally circular openings, right generally circular openings, and the square opening being of approximately the same size,
• the match bollard being adapted for engagement with the square opening in the base member, the number of left bollards corresponding to the number of left generally circular openings in the base member and the number of right bollards corresponding to the number of right generally circular openings in the base member, the plurality of left bollards being adapted for positioning in the left generally circular openings, and the plurality of right bollards being adapted for positioning in the right generally circular openings.

A bollard fence section adapted for engagement with a base member, the base member including a plurality of left generally circular openings extending downwardly from a top surface of the base member, a square opening extending downwardly from the top surface of the base member, and a plurality of right generally circular openings extending downwardly from the top surface of the base member, the number of left generally circular openings in the base member being less that the number of right generally circular openings in the base member, and the square opening being positioned between the plurality of left generally circular openings and the plurality of right generally circular openings, the bollard fence section comprising:

• a plurality of left bollards, a match bollard having a square shape adapted for engagement with the square opening in the base member, and a plurality of right bollards, the match bollard being positioned between the plurality of left bollards and the plurality of right bollards, each of the plurality of left bollards, right bollards, and the match bollard having approximately the same size square cross section, the number of left bollards corresponding to the number of left openings in the base member and the number of right bollards corresponding to the number of right openings in the base member, the plurality of left bollards being adapted for positioning in the left generally circular openings, and the plurality of right bollards being adapted for positioning in the right generally circular openings.