The Eurocode 3 Steel Design Calculator includes a library of common steel cross-sections and steel grades from the SkyCiv European and British Section Library. The EN 1993-1-1 steel beam calculator supports the following shapes:

• I Sections
• T Sections
• Channels
• Rectangular Hollow Sections (RHS)
• Square Hollow Sections (SHS)
• Circular Hollow Sections (CHS)
  

The axis conventions used in the Eurocode 3 steel design calcualtor is displayed below. For sections with an inclined principal axis (angles), the conventions displayed below are rotated counter-clockwise by the principal axis angle (α). Loading inputs will be converted to principal / geometric axis directions by the principal axis angle where required.

The Eurocode 3 steel beam calculator can be used to design a wide variety of steel members. This includes the design of:

• Steel columns to Eurocode 3
• Steel beams to Eurocode 3
• Steel joist to Eurocode 3
• Steel truss members to Eurocode 3
• Steel bracing to Eurocode 3

More but not limited to including the design of the following steel profiles rafters, strutting beams, hanging beams, ceiling joists, roof lintels, floor joists, and lintels and more to EN 1993-1-1.

This tool carries out a comprehensive set of section and member capacity checks in accordance with Eurocode 3:

• Section Classification - Clause 5.6
• Moment Capacity - Clause 6.2.5 & Clause 6.3.2
• Shear Capacity - Clause 6.2.6
• Axial Capacity - Clause 6.2.4 & Clause 6.3.1.3 & Clause 6.3.1.4
• Combined Actions Capacity - Clause 6.2.9 & Clause 6.3.3

Section classification is determined using respective flange and web yield stress values. A single section classification is determined based on applied loading and used for all calculations. When a member is loaded in biaxial bending, the assigned section classification is the least-favourable classification out of the two directions of bending (and compression, if present). Section classification can be manually assigned using the dropdown input. Tension-only members are assigned Class 1 for all calculations. For further information on the Section Classification approach: EC3 Section Classification Guide

The following assumptions and notes are followed for bending moment capacity calculation in the above Eurocode 3 Steel Beam Calculator:

• Section moment capacity (Mc) is calculated using the lesser of flange and web yield stress.
• Members are assumed to be laterally restrained at the top and bottom at supports.
• CHS and SHS members are assumed to not be susceptible to lateral-torsional buckling.
• β = 0.75 for all sections designed using Clause 6.3.2.3. If the British Annex is selected, β = 1.0 for welded sections, and 0.75 for all other sections.
• λLT,0 = 0.4 for all sections designed using Clause 6.3.2.3. If the British Annex is selected, λLT,0 = 0.2 for welded sections, and 0.4 for all other sections.
• The logic for calculation of lateral torsional buckling capacity is detailed below:

With a comprehensive library of steel shapes and grades, the SkyCiv Eurocode 3 Steel Quick Design module can be used as a substitute for a table of design properties for steel profiles. Instead of a steel beam span table the above calculator can be used to generate this information by simply choose a section and enter your member lengths to determine the capacity for that length.

Yes, the Eurocode 3 steel beam design calculator allows users to design custom (or fabricated) steel sections in accordance with EN 1993-1-1:2005. To do this, simply select your required Shape and then select "Custom" in the Section dropdown menu. This will automatically set the steel Grade to "Custom" allowing the user to input a custom yield strength for the fabricated section. Note, all calculations for Custom sections assume the section is comprised of heavily welded steel plates (instead of a hot rolled / cold formed steel section).

Steel mechanical properties are calculated using EN 10025-2 Table 6 and EN 10210-1 Table B.3, rather than EN 1993-1-1 Table 3.1. Section radius is included in calculations for section area, second moment of area and section classification only. J and Iw values are calculated according to EN 1993 approximations.

SkyCiv offers a wide range of Cloud Structural Analysis and Engineering Design Software, including:

• Eurocode 9 Aluminium Design
• Eurocode 3 Purlin Design
• Eurocode 3 Bolt Group Calculator
• Eurocode 3 Weld Group Calculator
• Eurocode 2 Development Length Calculator
• Eurocode 2 Lap Length Calculator
• Eurocode 5 Timber Design Calculator
• Eurocode 3 Scaffold Design Calculator
• Steel I Beam Load Capacity Calculator
• Lifting Lug Design Calculator

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