Export bridge procurement is decided as much by paperwork as by steel. A technically perfect bridge with an incomplete inspection package can be rejected at the port; a documented, tested, traceable bridge with a slightly higher price usually clears customs and the engineer’s review without a second round.
The four documents buyers actually check
First, the design basis: which code, which load class, which deflection limit, and the calculation report that proves it. Second, material certificates: mill certificates to EN 10204 3.1 for every heat number, with Charpy impact results where the specification calls for toughness (Zone 2 or Zone 3 in ASTM A709 terms). Third, welding documentation: WPS, PQR, welder certificates and NDT reports. Fourth, coating records: galvanizing thickness readings and, for painted systems, DFT and adhesion test results.
Where Chinese suppliers lose marks
Not usually on steel quality — on traceability. A consignment where panel 47 cannot be tied to a heat number is a consignment that fails a third-party inspection, no matter how good the steel is. The practical fix is a marking and documentation system built at fabrication, not reconstructed at shipment: heat number stamped on each member, packing list keyed to it, and photographs at each hold point.
Third-party inspection: who pays and who chooses
SGS, BV, TÜV, Intertek and national inspection agencies all offer pre-shipment inspection. Buyers often insist on their own inspector; suppliers often prefer their own. The workable middle is a joint inspection at the fabricator’s yard against an agreed ITP, with the buyer’s representative present by video or in person, and a witnessed load test on a sample assembly.
Standards are not interchangeable
AASHTO, BS 5400, EN 1993 and JTG all produce safe bridges and none of them produces identical drawings. Where the buyer’s code differs from the fabricator’s habit, the honest approach is to design to the buyer’s code and disclose any deviation in writing before contract — not to relabel a domestic design.
What good documentation looks like at handover
A single indexed package: design report, drawings as-built, material certificates by heat number, NDT reports, coating records, erection manual, spare parts list, and a maintenance schedule with inspection intervals. It costs a few days at the end of a project and saves months of argument later.
