You just make less of them. Some buildings are discretionary, like your big apartment buildings you probably want (these were the two that got cancelled).
Person funding can make x profit over building per year. Person loaning loans x for y sum. Building costing more than interest amortized profit means it doesn't get built.
And I just had a doctor's office fitout cancelled mid project (drafted it personally :) ). so apparently those are, too.
Public projects like schools rarely get cancelled. Factories I personally don't draft so I really can't tell you.
Healthcare absolutely has a ton of discretion for their buildouts.
What's the alternative to steel? You just make less if it's not profitable to make.
If the stated goal is jobs, the tariffs aren't doing it from what I can tell.
It seems to be hands have been put on the scales, and to call cancelling the building that would have otherwise been built due to market forces good needs some testing. If it were doctors offices in already served areas, sure, but these were not subsidized but lower end apartment buildings in NYC. I'm hoping the guys who were laid off moved to some other company rather than exiting the trade.