Xponexus Engineering

Structural Steel Beam Selection & Verification Tool

Comprehensive, design-assist module for rolled steel beam selection under Eurocode EN 1993-1-1. Evaluate bending, shear, LTB, deflection, and vibration with auto load combinations and clear reporting.

Bending Shear LTB Deflection Vibration

SLS checks LTB Vibration

Scope note (important):
This calculator is a preliminary/design-assist tool based on typical EC3 simplifications. Always verify with full EN 1993-1-1 clauses, National Annex requirements, and project-specific analysis.

Design basis & partial factors

Eurocode EN 1993-1-1 default. AISC 360 toggle is future-ready (placeholder).

EC3 default

Design standard Standard γ_M0 γ_M1 (LTB) γ_G γ_Q

Steel material Steel grade f_y (MPa) f_u (MPa) E_s (MPa)

Service limits Deflection limit L/ Vibration f_min (Hz) Steel density (kg/m³)

Section library & geometry

Select a rolled section or override key properties manually.

Section properties

Section library Series Section size Use manual override?

Properties are limited sample data for demonstration. Replace with full section database for production use.

Manual section override (mm, mm², mm³) Area A (mm²) I_y (mm⁴) I_z (mm⁴) W_pl,y (mm³) W_el,y (mm³) A_v (mm²)

Beam geometry Span L (m) End condition LTB buckling length L_b (m) Moment gradient factor C₁

Loading

Line loads and point loads. Eurocode EN 1990 combinations auto-generated.

ULS + SLS

Uniform loads Dead load G_k (kN/m) Live load Q_k (kN/m) Self-weight (auto) (kN/m) Include self-weight?

Point load (optional) Point load P (kN) Location a (m from left) Combination factor ψ₀

Point loads are combined with UDL for bending and shear. Place within span for meaningful results.

Service combination factors ψ₁ (frequent) ψ₂ (quasi-permanent) Dynamic factor (vibration) k_d

Check summary

ULS + SLS

Bending resistance

Shear resistance

LTB resistance

Deflection (SLS)

Vibration (f₁)

Suggested minimum beam

Utilisation ratios

Moment & shear diagrams

Detailed calculation report

Intermediate values and design checks are printed for transparency.