EN 1090-2 (EXC3) Eurocode 3 (EN 1993) & Eurocode 8 (EN 1998)

Structural Steel Frame & Seismic Engineering

Precision-welded S275 and S355 box profiles providing superior structural ductility, millimeter tolerance and high seismic safety across multi-storey volumetric configurations.

Technical Subsystem Keywords: # structural steel frame modular # S355 box profiles # seismic resistant steel framing # EN 1090-2 EXC3

Key Engineering & Performance Metrics

Steel Grade S275JR / S355J2H Certified
Execution Class EXC2 / EXC3 (EN 1090-2)
Deflection Limit L/300 under full service load
Corrosion Protection C3 / C4 High-durability primer + polyurethane
Structural Mechanics

System Architecture & Structural Mechanics

The volumetric chassis serves as the load-bearing spine of every SERMODULA unit. Fabricated in a controlled factory setting with robotic welding jigs, each 3D steel frame is designed according to Eurocode 3 (EN 1993) to resist severe seismic acceleration and wind gusts up to Eurocode 1 criteria. The vertical columns transfer axial gravity loads while rigid diaphragm floors distribute horizontal shear evenly across module cluster nodes.
Norm Compliance

Technical Standards & Compliance Matrix

Verified design standards, testing criteria and tolerance controls.

Technical Parameter #1

Structural & Seismic

Applicable Standard
Eurocode 3 (EN 1993) & Eurocode 8 (EN 1998)
Limit / Rating
S355JR / S275JR, DCM/DCH Ductility
Verification Method
3D FEM Analysis & Verification Report
Technical Parameter #2

Steel Fabrication & Welding

Applicable Standard
EN 1090-2 (EXC3) / ISO 3834-2
Limit / Rating
EXC3 Execution Class, CE Marked
Verification Method
NDT Ultrasonic & Magnetic Testing
Technical Parameter #3

Corrosion Protection

Applicable Standard
ISO 12944 (C3 / C4 Dayanım)
Limit / Rating
Epoxy Primer + PU Topcoat (160–240 µm)
Verification Method
DFT Gauge & Cross-Cut Adhesion
Technical Parameter #4

Fire & Acoustic Separation

Applicable Standard
EN 13501-2 / ISO 717-1
Limit / Rating
REI 60–120 · Rw ≥ 56 dB / Ln,w ≤ 48 dB
Verification Method
Accredited Lab Test Certification
Technical Parameter #5

Dimensional Tolerances

Applicable Standard
EN 1090-2 D Sınıfı & ISO 2768
Limit / Rating
Diagonal & Vertical max. ±2.0 mm
Verification Method
3D Laser Metrology & Calibration Jig
Factory Production

Factory Pre-fabrication & Quality Verification (ITP)

Welding and assembly strictly follow EN 1090-2 execution class EXC2 and EXC3. Non-destructive ultrasonic (UT) and magnetic particle (MT) testing are performed on 100% of primary structural connections. Mill certificates (3.1 EN 10204) are digitally cataloged in the project quality dossier.
Interface Discipline

Layer Architecture & On-site Interface

01

Structural Node & Joint

Cast-steel corner blocks and EN 14399 grade 10.9 high-strength structural bolts guarantee instant load transfer.

02

Acoustic & Fire Seals

Continuous EPDM weather seals, intumescent fire gaskets and elastomeric vibration isolators installed between volumetric cells.

03

Vertical Shaft Coupling

Vertical MEP risers align on precision axes with flexible compensator couplings for rapid single-point hookup.

04

Certified Crane Rigging

Integrated rigging pick-points calibrated to volumetric center of gravity ensure balanced, tilt-free crane erection.

Technology Ecosystem

Explore Other Engineering Subsystems

Coordinated building envelope, MEP, acoustic, connection and quality control engineering systems.

SYS-02 · U ≤ 0.14 W/m²K →

High-Performance Building Envelope & Thermal Control

Continuous external mineral wool wrap, vapor-permeable smart membranes and thermal-bridge-free detailing achieving Passivhaus-level thermal retention and moisture safety.

SYS-03 · Eurocode 3 & 8 →

Volumetric Joint Interlocks & Structural Node Bolting

Bolted structural tie-plates transferring lateral seismic shear and wind uplift across module corners, enabling swift crane landing and rigid multi-unit coherence.

SYS-04 · Rw ≥ 58 dB →

Acoustic Insulation & Fire Compartmentation

Air-cavity separated double steel framing delivering zero cross-apartment noise transmission alongside REI 90 to REI 120 fire resistance certified by European testing standards.

SYS-05 · Plug & Play →

Plug-and-Play MEP Corridors & Factory Testing

Factory-installed and pressure-tested plumbing, pre-wired electrical quick-couplings and radiant underfloor heating pre-commissioned before departure.

SYS-06 · ISO 9001 / FAT →

Off-Site Quality Control, ITP & Tolerances

Multi-gate Inspection and Test Plan (ITP), 3D laser geometric metrology ensuring ±1.5 mm diagonal accuracy, and comprehensive Factory Acceptance Testing (FAT) documentation.

Direct Architectural & Engineering Leadership

Structure Your Technical Specification & Engineering Baseline

Share your structural parameters, Eurocode design requirements and target typology for a verified engineering feasibility review with the SERMODULA Engineering & Technical Team.

SERMODULA Structural Engineering Desk Eurocode 3 & 8 / EN 1090-2 Technical Coordination
Direct (GSM): +90 (505) 507 04 18
Central Switchboard: +90 (216) 614 04 34
Engineering Email: [email protected]
Consult Engineering Desk Request Technical Specification Dossier →
Knowledge Base

Frequently Asked Questions

How high can modular steel buildings reach?
With standard volumetric box columns, up to 4 to 6 storeys can be built directly. For higher multi-storey developments, hybrid braced cores or podium bases allow projects up to 10+ storeys.
What corrosion protection is applied?
Profiles undergo grit blasting to Sa 2.5, followed by zinc-rich epoxy primer and high-build polyurethane topcoats conforming to ISO 12944 C3/C4 environments.
How does steel behave during earthquakes?
Structural steel offers the highest strength-to-weight ratio and ductility. Lightness reduces seismic inertia forces by over 60% compared to reinforced concrete.
Are structural calculations checked by local engineers?
Yes. All Eurocode 3 and 8 structural calculations are shared with local chartered engineers (Prüfingenieur, Contrôleur Technique) for local building permit approval.
Can modules be relocated in the future?
Yes. Because units are bolted rather than welded on site, they can be unbolted, lifted by crane and transported to a new location with minimal structural loss.