¿Qué información necesita el cliente para iniciar el cálculo estructural?

– Ubicación y altitud de la obra – Cargas de uso (cubierta, instalaciones, viento, nieve…) – Uso del edificio o estructura, layout si existe. – Normativa aplicable según zona y normativa específica del cliente. Con estos datos, nuestros ingenieros pueden dimensionar correctamente la estructura metálica o mixta.

¿Cuánto tiempo suele llevar la fase de ingeniería de detalle y validación del modelo IFC?

El plazo varía según la complejidad del proyecto y la calidad de la información recibida, pero en encargos estándar esta fase suele completarse en 1–2 semanas. Esta estimación se basa en nuestra experiencia interna con proyectos de alcance medio; proyectos muy sencillos pueden ser más breves y los de gran envergadura, algo más largos.

¿Cómo garantiza Jansa Metal la trazabilidad de los materiales?

En la recepción y clasificación se comprueban y registran todos los certificados de origen y lotes de laminación. Cada pieza se etiqueta con un código que conecta su plano de fabricación y su orden de producción.

¿Qué controles de calidad se aplican durante la fabricación?

- Controles volantes en zona de fabricación (tolerancias y geometrías). - Inspección de soldadura según EN ISO 5817 y, cuando procede, pruebas no destructivas (líquidos penetrantes, ultrasonidos). - Verificación de espesores de pintura y acabados antes del embalaje.

¿Qué recibe el cliente al finalizar el Proceso Jansa?

– Declaración de prestaciones y etiqueta marcado CE conforme a la norma UNE-EN 1090.

Manufacturing of steel structures

OUR WORK PROCESS

Integral manufacturing of steel structures with guaranteed deadlines

The manufacturing of steel structures at Jansa Metal follows our own precise and fully controlled process, which allows us to deliver each structure ready for assembly and on time.

A unique workflow that delivers your structure ready for assembly, meeting every deadline with precision.

📞 Request your technical appointment and get started without delays

1. Analysis

We receive your order and treat it as a challenge.
We review similar cases from our archive, select the most reliable solutions, and present alternatives to the client or site management (dirección facultativa).

2. Solution and Proposal

Economic Proposal + Graphical Schemplan.
We calculate and quantify the chosen options (economy vs. speed vs. durability) so that you can make a decision with full visibility.

3. Detail Engineering

Once the order is approved, detail engineering begins: the structure is recalculated and connections are developed according to Eurocodes. The IFC model is then generated, accompanied by the justification calculation report for site management to review and validate.

4. Production Order

Once the IFC model is validated, the model is finalized and the manufacturing file is generated according to the required execution level: listings and NC (Numerical Control) files, general drawings, sections, piece-by-piece drawings, anchoring, and assembly.

5. Procurement Management

During the engineering and validation phase, stock and lamination alternatives are analyzed and compared with suppliers to ensure that materials arrive according to the production schedule.

6. Receipt and Classification

Materials are received and verified, and certificates are registered to ensure traceability. Batches are classified according to the required surface treatment.

7. Treatment

After material receipt and classification, the batches are sent to the shot-blasting and shop-primer line or are labeled for manufacturing and the chosen treatment. Depending on the project, galvanization, basic protection, or paint systems designed for C1–C5 environments are applied. In cases requiring fire resistance (EI30, EI60, EI90), after shot-blasting and priming, intumescent paint is applied at the end of manufacturing. Its thickness is calculated to guarantee the required resistance time.

8. Fabrication of welded plate girders (built-up sections)

We produce Welded Built-Up Sections (WBS) on the automatic JUWELD – TwinArc line (double-wire submerged arc process). This system allows for straight or variable inertia profiles up to 1.5 m wide and 30 mm thick, with lengths up to 16 m and a guaranteed weld penetration of 3.1 mm. The output profiles are subsequently directed to CNC machining (phase 9) or, depending on the planning, directly to welding (phase 11).

9. NC Machining

Material batches per project arrive via the roller and transfer system to the cutting and drilling lines. They proceed to cutting and drilling: profiles ≤ 350×350 mm (up to 12 m) by CNC laser, and the rest by plasma robot (up to 1,200×600 mm and 21 m). Each piece is marked at the start of the process. The output pieces are identified with their engraved mark, and are directed by rollers/transfer to the shot-blasting and painting line or to the fabrication area.

10. Fabrication and Control

The machined parts are assembled in the fabrication area, operating in two shifts (6:00 – 22:00). Following the production system and the order’s execution level, spot checks are carried out, and all parts are labeled with a metal plate engraved with the job number and the shipping piece number.

11. Welding and Control

The identified parts are welded according to the welding plan and production order. Dimensional controls, penetrant testing (liquids), and ultrasonic testing are performed.

12. Final Finish

After welding, the chosen paint system and RAL color are applied. The metal labels ensure the traceability of each component.

13. Packaging and Strapping

Once painting and drying time are complete, the pieces are prepared in batches by delivery order and strapped, awaiting loading.

14. Loading and Transport

National or international transport by truck or container is coordinated. Loads are planned to maximize space and are secured with wooden reinforcements, preventing displacement and accidents during transit. This ensures the goods arrive intact and ready for on-site unloading.

15. On-site Receipt

The unloading and condition of the materials on-site are supervised. We verify that the assembly area is clear according to the planning communicated to the client. The pieces are then strategically stockpiled and the necessary team and means are organized, allowing a 10,000 m² warehouse to be assembled in just 2 weeks with a team of 5 people.

16. Setting-out Certificate (Acta de Replanteo)

Before starting assembly, Jansa Metal performs the Preliminary Setting-out Certificate: inspection of the anchors placed by the contractor before concreting to verify their correct positioning. After concreting, the Final Setting-out Certificate is issued to check that the anchors maintain the necessary position and level reservation for leveling.

17. Assembly

Assembly is carried out by teams of 3, with 2 aerial work platforms and a mobile crane; the number of teams and resources will depend on point 15.

18. Reception Certificate

Once assembly is finished, we conduct an exhaustive review with the client and/or site management, and the acceptance certificate is issued. Jansa delivers the CE Mark report and the Declaration of Performance according to EN 1090.

Other services

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At Jansa Metal, we offer comprehensive solutions for the manufacturing of metal structures, optimizing every process to ensure quality, strength, and efficiency.
Discover more about our services, from shot blasting and painting to PRS beam manufacturing and structural assembly.

FAQ’s

What information does the client need to initiate the structural calculation?

– Location and altitude of the site
– Service loads (roof, installations, wind, snow…)
– Use of the building or structure, layout if it exists.
– Applicable regulations according to the area and specific client regulations.

With this data, our engineers can correctly dimension the metallic or composite structure.

How long does the detailed engineering and IFC model validation phase usually take?

The lead time varies depending on the complexity of the project and the quality of the information received, but for standard orders, this phase is usually completed in 1–2 weeks. This estimate is based on our internal experience with medium-scope projects; very simple projects may be shorter and large-scale projects, somewhat longer.

How does Jansa Metal ensure the traceability of materials?

In the receipt and classification stage, all certificates of origin and lamination batches are checked and registered. Each piece is labeled with a code that connects its manufacturing drawing and its production order.

What quality controls are applied during the manufacturing process?

– Spot checks in the manufacturing area (tolerances and geometries).
– Welding inspection according to EN ISO 5817 and, when appropriate, non-destructive testing (penetrant testing, ultrasonic testing).
– Verification of paint thicknesses and finishes before packaging.

What does the client receive upon completion of the Jansa Process?

– Declaration of Performance and CE marking label according to the UNE-EN 1090 standard.

Ready for the First Step? Contact us!

Every great project starts with a conversation. Contact us and find out how we can bring your idea to reality, with metal structures that are as solid as your expectations.

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