Proektsoft Design Expert 2026 v3.6: Professional Software for Steel & Concrete Structural Design

Proektsoft Design Expert 2026 v3.6 is a comprehensive structural engineering software suite for the design of steel and reinforced concrete structures, developed by Proektsoft Ltd. (Bulgaria). The software supports multiple design modules, each specialized for specific structural elements, and is widely used in Bulgaria, Serbia, North Macedonia, Bosnia, and beyond .

Version 2026 v3.6 (part of the 2026 release cycle) continues the trend of modernizing the user interface, adding dozens of new profiles and materials, implementing new analysis features (2nd order analysis for steel frames), expanding IFC export capabilities, and enhancing reinforcement visualization in 3D

???? Primary Users

This professional structural engineering software is designed for:

  • Structural Engineers & Civil Engineering Consultants performing design of steel structures and reinforced concrete elements .

  • Design & Build Contractors creating cost-effective designs for industrial buildings, warehouses, and commercial structures.

  • Construction & Project Engineers verifying steel and concrete designs against international codes (Eurocode, AISC 360, ACI 318) .

  • Bridge & Infrastructure Designers working with foundations, retaining walls, and complex structural members.

  • Academic Researchers & Engineering Students studying structural mechanics and code-based design.

⚡ Key Features & Capabilities

 

???? Software Modules

Module Description
PLATE Analysis of foundations (isolated, combined, strip, pile caps) and retaining walls (cantilever, gravity, counterfort). Includes punch control, reinforcement design, settlements, and lateral earth pressure calculations .
STEEL Design of continuous or single-span steel beams, columns, trusses, and frames (portal frames). Includes profile optimization, 1st/2nd order analysis, lateral-torsional buckling, stiffeners, and base plates .
CONCRETE Design of beams (rectangular, T, L), columns (axial + biaxial bending), sections under bending + axial force, shear/torsion, and serviceability checks (deflection/cracking) .
MEMBER Design of arbitrary reinforced concrete cross-sections (interaction diagrams, M-N, Mx-My, shear/torsion).
FOUNDATION Complete foundation design (isolated, combined, strip, pile caps, retaining walls) integrated within the suite.
CROWN 3D modeling, finite element analysis (FEM), design, and detailing of spatial steel structures.

???? Core Calculation & Design

  • Steel: EC3 (EN 1993-1-1) and AISC 360 (Chapter H, I, F); includes 1st and 2nd order analysis, member capacity checks, stiffener design, splices, base plates, and shear connections .

  • Concrete: EC2 (EN 1992-1-1) and ACI 318; includes cross-section resistance (M-N, Mx-My), shear, torsion, deflection, crack width, and reinforcement detailing .

  • Portal Frame Design (CROWN module): 3D modeling, 2nd order analysis, member capacity checks, and connection design for industrial steel buildings .

  • Foundation Design (PLATE module): Base plate design, anchor rods, concrete breakout/pryout, shear lug, settlements, and foundation reinforcement .

???? What’s New in Version 2026 (Cumulative)

Category Updates (cumulative from 2024–2025 into 2026 release)
General UI Modernized interface; ribbon and classic menu; dark mode support
Profiles/Materials Added dozens of new steel profiles and concrete/rebar grades
Steel (EN 1993) 2nd order analysis for steel frames (CROWN) and continuous beams
Concrete (EN 1992) Improved 3D rebar visualization; reinforcement mesh for mat foundations
Foundations (ACI 318) Anchor rod design to ACI 318-25 (tension-shear interaction exponent 5/3, side-face blowout)
IFC Export Enhanced BIM interoperability
Localizations Added EN national annexes for Bulgaria, Romania, Cyprus
Performance Faster solver engine for large models (CROWN)

???? Interoperability & Standards

  • EN 1993-1-1, EN 1992-1-1 with selectable national annexes (Bulgaria, Romania, Cyprus) .

  • AISC 360, ACI 318 for international projects .

  • IFC Import/Export for BIM collaboration (compatible with Revit, Tekla, ArchiCAD) .