Steel member marking is how each piece in a delivery is linked to the erection drawing. A packing list does the same for the whole shipment. Together they let the site team find the right piece quickly and spot a missing one before the crane arrives. Poor steel member marking is one of the commonest causes of delay on a steel project.
What steel member marking is
Each fabricated piece carries a unique mark that appears on the erection drawing. The mark is painted or stamped on the steel, and often also on a tag. Members that are identical share a mark; members that differ in any way have their own. The mark tells the erection crew where the piece goes and which way it faces.
Good steel member marking follows a few simple rules. Good marks are:
- Unique and consistent with the drawing
- Legible after coating and after transport
- Placed where they can be read once the piece is stacked or lifted
- Accompanied by an arrow or end mark for direction where needed
The packing list
A packing list records what is in each bundle, crate or container. For steel, it should show the member marks, the quantities, the dimensions and the weight, and which package holds each item. The list should match the shop drawings and the bill of materials.
Material traceability on top of marking
Marks do two jobs. One is erection: where the piece goes. The other is quality: which steel it was made from. A tracking code can link a member to its mill certificate and to the inspection records. Our guide to mill test certificates explains why the link matters. At Truong Thinh, incoming materials are checked against the CO and CQ certificates, and plates, beams and brackets are labeled with a tracking code stored in the production system.
Loading and shipping
For export, the packing plan sets how the pieces are bundled, protected and loaded. Long members, bolts and small parts need different packages, and the sequence of loading should follow the erection sequence so that what is needed first comes off first. Our guide to structural steel export from Vietnam covers packaging, documents and delivery.
Checks before the shipment leaves
- Every member has a mark that matches the drawing
- The packing list matches the marks and the quantities
- Bolts and small parts are packed with labels for the connection they belong to
- Coated members are protected from damage during loading
- A copy of the packing list travels with the shipment and another is sent ahead
What the site team should do
Check the delivery against the packing list on arrival, note any shortage or damage in writing and store pieces in erection order. Our overview of how a steel structure project moves from drawings to erection shows where this step sits. If you compare steel structure supplier options, ask to see a sample packing list and a marked member.
If you are planning a shipment of fabricated steel, share the destination and the member list, and request a fabrication quotation from our engineering team.
Frequently Asked Questions
Should member marks be painted or stamped?
Either can work. Marks must stay legible after coating, so many projects use paint marks on the coating plus a tag, and stamps on uncoated steel.
What goes on a packing list?
The marks, quantities, dimensions, weights, the package each item is in and the shipment reference. It should match the drawings.
How do I handle a missing piece?
Note it against the packing list on arrival, tell the supplier the same day and check whether it is in another package before ordering a replacement.
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