From Plate Burn to Final Coating
Precision Heavy-Steel Fabrication
For over 60 years, Transco has delivered complex steel fabrication projects—bridges, dam gates, water screens, and conveyors—earning national recognition for quality and reliability.
What We Build
From AISC-certified structural modules to precision hydro-gates, our Portland shop delivers heavy-steel projects that arrive onsite ready to bolt-up, weld-out, and perform.
Bridges & structural modules
AISC-certified fabrication of plate-girder spans, trusses, pier caps and pedestrian bridges—shop-welded, blasted and coated for rapid field erection and reduced traffic closures.
Hydro-dam gates, stop-logs & bulkheads
Tainter, slide and roller gates (up to 60 ft), stop-logs and floating orifice bulkheads machined to tight tolerances and finished with NACE-compliant coatings for U.S. Army Corps projects.
Intake screens & water-screening frames
Custom bar racks, traveling fish screens and debris rakes—designed, fabricated and field-supported by crews experienced in Bonneville, John Day and Rocky Reach dam installations.
Heavy Platework & Specialty Weldments
Thick-section components—draft-tube gates, machine bases and other multi-ton assemblies—burned, stress-relieved and finish-machined in house.
Facilities & Capabilities
Everything happens under one AISC-certified roof—so schedules stay tight and quality stays high.
Structural Fabrication & Welding
100 000-ft² AISC-certified Portland plant staffed by certified welders for any shape, size, weight, or thickness.
CNC Cutting & Plate Profiling
8 × 40 ft CNC plasma burn table delivers tight-tolerance plate work and rapid throughput.
Beam Processing Line
Python CNC beamline drills, copes, and marks members in one pass—jump-starting complex builds.
Surface Prep & Coatings
Enclosed sand-blast bay and multi-coat paint booths keep corrosion control under the same roof.
3-D Modeling & Detailing
Advanced computer drafting and modelling streamline fit-up before steel hits the floor.
Quality & Safety
Rigorous QA program and strict safety standards embedded in every step of production.
Certifications & Safety
Accreditations matter—so does a spotless safety record. Here’s how we back every weld with proof.
- AISC-certified heavy-steel facility
- AWS-credentialed welders, fitters & inspectors
- ISO-aligned QA/QC program—every weld and coating logged
- MSHA & OSHA compliance, with zero lost-time incidents reported for 2024 Service Pages