Structural steel contractors in Ontario, CA
13 licenses with the C-51 classification list Ontario (San Bernardino County) as their address with the state, 12 of them active. Active licenses with nothing flagged come first.
- Designer WorksB · C-23 · C-51 · #986451 Ontario · San Bernardino County Active
- Glenn Kraus FabricationC-51 · C-60 · #637291 Ontario · San Bernardino County Active
- Journeyman Iron Works CorporationC-51 · #1065387 Ontario · San Bernardino County Active
- K P Construction Co IncB · C-8 · C-51 · #790555 Ontario · San Bernardino County Active
- Kennedy SteelC-51 · #1086611 Ontario · San Bernardino County Active
- Kp BuildersB · C-51 · #983861 Ontario · San Bernardino County Active
- Luisa Margarita Jimenez HerreraC-51 · #1080360 Ontario · San Bernardino County Active
- Maldonado IndustriesC-51 · C-60 · #964663 Ontario · San Bernardino County Active
- McIntyre Metal DeckingC-51 · #1078212 Ontario · San Bernardino County Active
- Steel Design Builders IncC-51 · #969622 Ontario · San Bernardino County Active
- The Mc Intyre Company A Calif PartnershipC-51 · #590332 Ontario · San Bernardino County Active
- Western Deck and Steel Erection Dba Western Metal DeckC-51 · #550219 Ontario · San Bernardino County Active
- Aj Claremont Structural Steel Fab IncC-51 · #1137486 Ontario · San Bernardino County Suspended: no workers' comp
Source: CSLB license file, Nov 8, 2026All trades in Ontario