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.
Railroad Rails; Railroad Tie Plates; Railroad Turnouts and Components; Railroad Spikes.
Ballast (FSC 5610); Railroad Ties (FSC 5510).
Possible NAICS Codes
331110 – Iron and Steel Mills and Ferroalloy Manufacturing
326199 – All Other Plastics Product Manufacturing
336510 – Railroad Rolling Stock Manufacturing
336611 – Ship Building and Repairing
321114 – Wood Preservation
237990 – Other Heavy and Civil Engineering Construction
488210 – Support Activities for Rail Transportation
331210 – Iron and Steel Pipe and Tube Manufacturing from Purchased Steel
332312 – Fabricated Structural Metal Manufacturing