Um ... yeah! Just how do the logistics of installing and maintaining those porta-potty units work in high-rise building construction? Lifting one up by crane and setting it on the topmost, exposed level is easy enough! Do they then lift it up to the next new level at the appropriate time, or do they leave it there for workers who will finish up that level, and lift a new one for the new level? If the unit stays on that level, how do they regularly empty/service them if the elevators aren't implemented yet? And if that isn't the case, where do workers who will finish the lower levels go? -- unless they have to trudge up to the topmost level or down to ground level to do their business?! Details, details! Someone must think these through!
Sorry! ... Just my potty side of my personality! Carry on!