3D printing stackable girders

RepRapper Forrest Higgs designed an interlocking beamed structure that could be 3D printed — thus advancing the RepRap’s stated purpose of someday being able to print new RepRaps. Currently much of the support structure cannot be printed. But what if printable girders could be stacked on top of each other? Higgs’ project may not be the final word but it’s definitely an interesting development. [via The RepRap Blog]