Staalgoed Handel B.V.

Code language on reinforcing steel

05-05-2020 | W. van Wijngaarden

Construction products must comply with national and European codes and standards. On the products and in certificates all kinds of information is given about the used materials, product standards, product requirements, identification and  the producer. This also applies to reinforcing steel. On the reinforcing steel  a “code language” indicates where and by whom it was made. Below we explain how you can decipher that code language.

Read the origin of the rebar with the rolling mark

By means of a rolling mark on the reinforcing steel it is indicated what the characteristic of the steel type is, in which country the reinforcing steel is manufactured and from which producer it comes. This means you can always check where your reinforcing steel comes from before you start processing the supplied reinforcing steel. Moreover, you know for sure, when the rolling mark is present in the KIWA Reinforcing Bar booklet , that it meets the European reinforcing steel standard. The traceability of the rebar is also important when there is a defect or damage to a building.

Decipher reinforcing steel coding

Reinforcing bars must be provided with a distinctive rolling mark about 1 m apart. Read it as follows:

Steel type

The rolling mark is applied by means of thickened ribs on the reinforcing steel. First, you see two thickened ribs, this indicates that the steel type is B 500 (B = reinforcing steel, 500 = yield point).

Production country

After those two thickened ribs, you can count the number of normal ribs up to another thickened  rib. The number of normal ribs indicates which country the steel comes from:


Number of ribs

Germany, Austria, Poland, Slovakia, Czech Republic, Switzerland


Belgium, Luxembourg, the Netherlands


France, Hungary


Italy, Malta, Slovenia


England, Ireland, Iceland


Denmark, Finland, Norway, Sweden, Estonia, Latvia, Lithuania


Portugal, Spain


Greece, Cyprus


Other countries




Finally, the producer is indicated. The producers have a number per country, which is shown with the ribs. If the producer has a number between 1-12, that is the number of normal ribs between two thickened ribs. If the producer has a number above 12, dividing according to the decimal system is applied. For example, two normal ribs between two thickened ribs and then four normal ribs between two thickened ribs makes 24.

rolling mark France

Figure 1 Example of reinforcing steel coding

rolling mark Spain
Figure 2 Example of coding of reinforcing steel according to the decimal system

Overview of all used marks

In addition to the above coding, thickened longitudinal ribs, dots, thickened square areas and numbers are also used. For a complete overview of the codes of the various KOMO-certified producers of rebar, see the Kiwa rebar booklet.

Other codes for reinforcing steel outside Europe

The codes described above apply to reinforcing steel which is processed in Europe. For example, in America and Australia, other ways of marking on rebar are used. There letters and numbers are rolled into the steel.

Why do you order rebar from us?

All the reinforcing steel supplied by meets the performance requirements of the Dutch product standard NEN 6008: 2008 + A1: 2020 (this standard replaces the NEN6008: 2008 since 01-02-2020) and the European reinforcing steel standard NEN-EN 10080: 2005 . You also have a lot of ease of ordering with us:

  • You can immediately request a quote for your project.
  • The reinforcement can be developed and delivered as a construction kit .
  • And you can order customized rebar yourself within 3 steps: choose the shape, give the dimensions / angles and calculate your price!

This information has been compiled with the utmost care. If, nevertheless, inaccuracies or imperfections occur, accepts no liability for any consequences thereof.

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