Reference standards
SP and GOST standards and verified engineering data are used as distinct calculation sources.
ONLINE TOOLS FOR ENGINEERS
Engineering calculationswith clear visual diagrams
Structural, load, thermal, welding and rigging calculations — the tools you need to design and verify.
01 / DISCIPLINES
Engineering calculations by discipline
Choose a task — from section weight to steel truss analysis.
Mass & geometry
Sections, sheet metal, mass, geometry and surface area.
OpenLoads
Snow and wind actions on structures.
OpenStructures
Steel members and steel trusses.
OpenThermal analysis
Building envelopes, thermal resistance and heat loss.
OpenConnections
Weld calculations and reference data.
OpenLifting & erection
Rigging, sling forces and lifting arrangement checks.
Open02 / WORKFLOW
From input data to engineering results
1-LVL shows the calculation model, intermediate values and completed checks alongside the final result.
Illustrative example · draft · not a calculation
- 01
Input data
→- Span
- 6000 mm
- Height
- 800 mm
- Steel
- C345
- Section
- 100×50×3
Geometry, materials, loads and service conditions.
- 02
Calculation model
→The input data defines a clear structural model.
- 03
Result
- Governing member
- W07
- Force
- 18.4 kN
- Utilization
- 72 %
- Status
- Review required
Key metrics, warnings and a verifiable calculation trace.
03 / VISUALIZATION
Calculations you can see
Input changes are reflected in the diagram, making calculations easier to understand and errors easier to spot.
Demo · draft
Thermal analysis
- Outer layer
- 20 mm
- Insulation
- 150 mm
- Structural layer
- 200 mm
- Internal finish
- 15 mm
- R / U
- After calculation
Illustrative diagram. Values and lines are not verification results.
Open calculatorDemo · draft
Rigging
- Sling angle
- α
- Sling force
- T₁ / T₂
- Governing leg
- After calculation
Illustrative diagram. Values and lines are not verification results.
Open calculatorDemo · draft
Steel truss
- Span
- 6000 mm
- Tension
- Dashed
- Compression
- Solid line
- Deflection
- Illustrative curve
Illustrative diagram. Values and lines are not verification results.
Open calculator04 / VERIFIABILITY
Verifiable engineering logic
Results should be understandable to engineers as well as software.
Calculation trace
Formulas, substitutions and intermediate values are available for review.
Data provenance
Materials, sections and reference values retain their source and data version.
Incomplete checks stay visible
If data is missing or a check is not implemented, the system says so instead of reporting a false PASS.
06 / APPLICATIONS
For practical engineering tasks
Structures
Steel member and truss calculations.
Loads
Snow and wind actions.
Building envelopes
Thermal checks for walls and roofs.
Lifting & erection
Rigging and force assessment during lifting.
Materials
Mass, section properties and paint area.
Connections
Calculations and reference information for welded joints.
Start with the calculation you need
All engineering tools are collected in one catalog.