Product Name

Bridge Flat Steel (Bridge Flat Bar / Heavy Flat Plate Strip)

Introduction

Bridge Flat Steel refers to heavy, wide flat bars or strips tailored for bridge construction and related infrastructure. Supplied as solid flat bars, machined/planed flats or cut-to-width plate strips, these members are used as bearing plates, splice/cover plates, stiffeners, grout/shim plates, deck tie strips and connection plates where high cross-sectional area, good bearing contact and reliable welding/bolting surfaces are required. Bridge-grade flat steel is specified for high strength, dimensional accuracy, fatigue-aware edges and durable surface protection for long service life in exposed conditions.

Typical Specifications

Forms: Solid flat bars (rectangular cross-section), planed/ground flats, and cut-to-width plate strips.

Material grades: Structural and bridge steels - S355 / Q345, A572 Gr.50, A709, AH36/DH36 for marine/bridge; stainless or weathering steel on request.

Width (W): 20 mm – 1200 mm (typical; custom widths available).

Thickness (T): 4 mm – 150 mm (thin shim plates to heavy cover plates).

Length: Standard 3 m, 6 m, 12 m; cut-to-length or single-piece to transport limits.

Tolerance & flatness: Manufactured to tighter flatness and thickness tolerances appropriate for bearing and splice contact; precision ground/planed options available.

Mass: mass (kg/m) = Width(mm) × Thickness(mm) × 0.00785.

Key Features & Advantages

High bearing & shear capacity: broad contact area for bearings, splice plates and connectors, distributing loads and reducing bearing stress.

Dimensional accuracy & flatness: factory planing/ grinding available to ensure full-face contact for grout, bearings and welded splices.

Fatigue-aware supply: edged and prepared to minimize stress concentrations for cyclic traffic loads; good weldability for durable connections.

Versatile supply forms: as-rolled, planed, ground, slotted or pre-drilled to customer patterns.

Surface protection: can be delivered primed, painted, hot-dip galvanized or left for site coating per bridge spec.

Cost-effective alternative: simple geometry reduces fabrication time compared with complex welded assemblies for many splice and bearing applications.

Typical Applications

Bearing plates and pedestal shims under bearings and supports.

Flange/cover plates and splice plates for plate girders and I-beams.

Deck tie-down strips, edge strips and connection straps in steel-concrete composite decks.

Stiffener strips, doubler plates and local reinforcement around cutouts and access openings.

Grout bearing plates and leveling plates for piers and abutment interfaces.

Temporary works, falsework bearing plates and erection aids.

Fabrication & Value-Added Services

Cut-to-size & precision planing: thickness/flatness control for bearing surfaces and grout contacts.

CNC profiling & drilling: bolt-hole patterns, slots and countersinks for splice kits and bearing bolts.

Machining & grinding: precision ground faces for sealing, bearing contact or coupling with elastomeric bearings.

Weld preparations: beveling, edge chamfering and tack assemblies for shop welding.

Coating & protection: shot-blast, zinc-rich primer, epoxy/PU topcoats, hot-dip galvanizing or duplex systems.

Kitting: numbered splice packs including plates, bolts, washers and assembly drawings for rapid site erection.

Quality Assurance & Testing

Material certification: Mill Test Certificate (MTC) with chemical & mechanical test results per order.

Dimensional & flatness inspection: gauge reports for thickness, width and face flatness; surface roughness reports if required.

Mechanical tests: tensile, yield and, if specified, Charpy impact tests for low-temperature service.

Weld & NDT: MT/UT/RT on critical shop welds or splice seams as specified.

Coating inspection: blast profile, coating thickness and adhesion testing to project specs.

Packaging, Transport & Site Support

Packaging: flat-stacked on timber skids with polymer spacers, strapped and protected to avoid edge damage.

End protection: edge guards for plated edges and caps for machined faces.

Marking: plate ID, heat no., thickness and orientation marked for site fit-up.

Transport: single-piece lengths sized to transport/crane limits; long plates supplied as spliced assemblies with match-drilled splice plates.

Site services: supply of erection drawings, bolt kits, and optional on-site support for fit-up and alignment.

Ordering Information - What We Need

Please provide:

Width × thickness × length and quantity (or drawing).

Material grade and required supply condition (as-rolled / planed / ground / machined).

Tolerances/flatness requirement and finish/coating (galvanize/primer/paint).

Hole/slot patterns, chamfers, countersinks or weld prep instructions.

Any mechanical test requirements (MTC, tensile, impact) or NDT.

Delivery constraints (single-piece transport/crane limits) and target lead time.

Why Choose Our Bridge Flat Steel?

We supply bridge-grade flat steel with precise flatness, fatigue-aware preparation and shop-ready value-adds-minimizing on-site adjustments and ensuring reliable bearing, splice and connection performance in bridge structures. Send your plate/strip list or drawings and I'll prepare a size-to-weight table, flatness/tolerance proposal and a quotation with lead time.

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