This means that you'll be able to search for NAICS codes directly (if that's your jam). We'll do the math; let's make better data on public procurement together.
Possible NAICS Codes
236220 – Commercial and Institutional Building Construction
236210 – Industrial Building Construction
237120 – Oil and Gas Pipeline and Related Structures Construction
236115 – New Single-Family Housing Construction (except For-Sale Builders)
212321 – Construction Sand and Gravel Mining