Heavy Structural Steel for Critical Infrastructure
Building modern infrastructure requires massive scale, uncompromised public safety standards, and logistical expertise. Openex possesses the vast factory space—spanning 180 acres—and 250-ton lifting capacities necessary to fabricate, assemble, and trial-fit immense structural bridge sections and civic infrastructure frameworks indoors.
From soaring highway interchanges to heavily trafficked railway bridges, we manufacture critical steel girders, enormous structural columns, and transportation frameworks. We operate under strict compliance with major transportation authorities and global construction codes, including the AWS D1.5 Bridge Welding Code.
Civil Infrastructure We Fabricate
Highway & Railway Bridge Girders
We process massive, thick-section steel plates into long-span heavy girders. Our capabilities include standard I-beam plate girders, complex curved trapezoidal box girders, and massive truss bridge frameworks utilizing precise multi-pass submerged arc welding (SAW).
Bridge Columns & Driven Piles
Utilizing our heavy plate rolling capacity, we form incredibly thick structural tubulars used for heavy bridge columns, concrete-filled steel tubes, offshore piles, and heavy support piers required for bridges spanning deep water.
Transit & Pedestrian Structures
Beyond heavy highways, we manufacture the sweeping architectural structures used in modern transportation. This includes public transit canopy structures, pedestrian overpasses, tunnel support ribs, and toll plaza steel frameworks.
Critical Bridge Surface Finishing (Painting)
Bridges are subjected to continuous environmental attack. The coating system is often as critical as the steel itself. Openex features state-of-the-art indoor climate-controlled paint booths massive enough to handle 100+ foot girders.
- ✓ SP-10 Near-White Steel Grit Blasting inside heavy blast rooms.
- ✓ High-performance DOT 3-coat systems (Zinc-Rich Primer, Epoxy Intermediate, Polyurethane Topcoat).
- ✓ Specialized application of bridge weatherizing steels (Corten) and anti-graffiti coatings.
Infrastructure Manufacturing Specs
| Criteria | Fabrication Capability |
|---|---|
| Welding Codes | AWS D1.5 (Bridge), AWS D1.1 (Structural Steel), ASME Section IX |
| Materials Frequently Used | A709 Grades 36, 50, 50W (Weathering Steel), HPS 70W |
| Heavy Layout & Trial Assembly | Indoor capacity for large-span continuous girder layout and hole-match-drilling prior to site shipping. |
| Quality Inspection (NDT) | 100% Phased Array UT/RT on Tension Flanges, MPI on fillet welds. Strict heat traceability tracking. |