It draws on the floor for construction projects? Why?
Either there's no building or there's a building. If there's no building, then where does it draw on? If the building is already there, then what's the drawing for?
With a lot of commercial buildings it is up to the tenant to install the interior walls, as everyone will have slightly different requirements. The Twin Towers were a great example of this: all of the structural support was done in the exterior walls and the center core, so you had a huge empty space you could fill in however you wanted.
The robot draws on the bare concrete floor, so all the carpenters, plumbers, electricians, and hvac technicians will install their stuff in the right place. Turns out having to rework your plans because someone installed a big expensive pipe in the wrong place is a huge hassle...
[0]: https://as1.ftcdn.net/jpg/09/64/72/08/1000_F_964720843_sLWAm...
