Systems, apparatus, and methods of adjustably building rebar structure

An apparatus for feeding rebar, the apparatus comprising:

• a feed column comprising a plurality of vertically arranged feed segments, each feed segment comprising:
• a feeding cavity defined through that feed segment and configured to direct a length of rebar from an input and to an output at a configurable height as measured from a feeding cavity of another feed segment of the plurality of vertically arranged feed segments;
• a rebar feed configured to feed the length of rebar through the feeding cavity;
• a coupling coupled to the feed column and configured to removably couple to a rail;
• a horizontal adjustment configured to decouple the coupling from the rail when deactivated and securely recouple the coupling to the rail when activated, wherein the feed column is movable along the rail when the coupling is decoupled;
• and
• a vertical adjustment configured to individually adjust a height between vertically adjacent outputs of feeding cavities of vertically adjacent feed segments of the plurality of vertically arranged feed segments of the feed column, wherein the vertical adjustment is performed via a computer controlled hydraulic system, wherein the computer controlled hydraulic system is configured to adjust hydraulic spaces within the plurality of vertically arranged feed segments that are filled with a hydraulic fluid, and wherein individual feed segments are addressable via hydraulic fluid distribution.