Printed Building Concept - Home Model

This is just concept modeling, not a "useful" thing.
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Printed building concept:
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By printing plastic on a large scale, buildings can be constructed with less labor, especially areas that typically require special trades. Specifically, electrical conduits, electrical boxes/gangs, plumbing/piping, and paint-free interior and exterior surfaces could be printed. Other features, including gutters, insulation cavities, stairs/railings, counters, sinks, and door/window (rough) framing could potentially be printed as well. (The labor of painters, plumbers, electricians, etc is significantly reduced). Also, the printed plastic serves as a print-in-place form that can be filled with concrete for strength. Finally, this should enable architectural designs that aren't currently practical/feasible. All the things below are related to this greater printed building concept (concrete bones and plastic skin, veins, nerv