We didn’t notice [Nikita]’s post about building a concrete 3D printer, a few months ago, but the idea seems sound: build a basic CNC XY axis and then add a mortar pump and hose to deposit ...

A man died early Saturday morning after he was crushed underneath a concrete block at a work site in Commerce, authorities said. The incident took place at about 12:08 a.m. at the 7000 block of ...