Free Structural Analysis · No Software Needed

Structural analysis for every engineer worldwide

Paste your building JSON and instantly detect soft storey, floating columns, P-Delta instability and 5 more failure patterns. Get a professional PDF report in one click — no software installation required.

Try Free Now

See Sample Report

No sign-up for preview AI · IS 456 / Eurocode 2 / ACI 318 Works for any country AI results in < 2 sec

AI Pattern Detectors

<2s

AI Analysis Time

12+

Automated Checks

Building Codes

building.jsonReset example

{
  "name": "Office Block — 8 Floors",
  "columns": [
    {
      "id": 0,
      "x": 0,
      "y": 0,
      "label": "A1",
      "active": true,
      "material": "ReinforcedConcrete",
      "area_m2": 0.2025
    },
    {
      "id": 1,
      "x": 6,
      "y": 0,
      "label": "A2",
      "active": true,
      "material": "ReinforcedConcrete",
      "area_m2": 0.2025
    },
    {
      "id": 2,
      "x": 12,
      "y": 0,
      "label": "A3",
      "active": true,
      "material": "ReinforcedConcrete",
      "area_m2": 0.2025
    },
    {
      "id": 3,
      "x": 0,
      "y": 6,
      "label": "B1",
      "active": true,
      "material": "ReinforcedConcrete",
      "area_m2": 0.2025
    },
    {
      "id": 4,
      "x": 6,
      "y": 6,
      "label": "B2",
      "active": false,
      "material": "ReinforcedConcrete",
      "area_m2": 0.2025
    },
    {
      "id": 5,
      "x": 12,
      "y": 6,
      "label": "B3",
      "active": true,
      "material": "ReinforcedConcrete",
      "area_m2": 0.2025
    },
    {
      "id": 6,
      "x": 0,
      "y": 12,
      "label": "C1",
      "active": true,
      "material": "ReinforcedConcrete",
      "area_m2": 0.2025
    },
    {
      "id": 7,
      "x": 6,
      "y": 12,
      "label": "C2",
      "active": true,
      "material": "ReinforcedConcrete",
      "area_m2": 0.2025
    },
    {
      "id": 8,
      "x": 12,
      "y": 12,
      "label": "C3",
      "active": true,
      "material": "ReinforcedConcrete",
      "area_m2": 0.2025
    }
  ],
  "beams": [
    {
      "col_a": 0,
      "col_b": 1
    },
    {
      "col_a": 1,
      "col_b": 2
    },
    {
      "col_a": 3,
      "col_b": 5
    },
    {
      "col_a": 6,
      "col_b": 7
    },
    {
      "col_a": 7,
      "col_b": 8
    },
    {
      "col_a": 0,
      "col_b": 3
    },
    {
      "col_a": 3,
      "col_b": 6
    },
    {
      "col_a": 1,
      "col_b": 7
    },
    {
      "col_a": 2,
      "col_b": 5
    },
    {
      "col_a": 5,
      "col_b": 8
    }
  ],
  "walls": [],
  "storey_heights": [
    3.5,
    3.5,
    3.5,
    3.5,
    3.5,
    3.5,
    3.5,
    3.5
  ],
  "has_foundation": true,
  "column_size_m": 0.45,
  "beam_depth_m": 0.5,
  "slab_thickness_m": 0.15,
  "dead_load_kn_m2": 5,
  "live_load_kn_m2": 3
}

How it works

Three steps to safety

Paste JSON

Describe your building in JSON — columns, beams, storey heights, loads. Use our example as a starting point.

AI Instant Score

The engine returns your structural safety score and core check results in under 2 seconds. No sign-up needed.

AI Full Report

Unlock the complete AI-generated analysis PDF with all 8 pattern findings, intelligent code references, and prioritised remediation advice.

Report Preview

What your engineering report looks like

A professional-grade PDF with all findings, code references, critical zones, and intelligent recommendations.

Structural Score

Overall 0-100 safety score derived from all checks.

Code Compliance

Pass/Fail on IS 456, Eurocode 2, ACI 318 checks.

Failure Patterns

8 dangerous patterns auto-detected with critical zone mapping.

PDF Download

Print-ready report referenced to international building codes.

Try Free Now

Structura

Structural Analysis Report

Office Block — 8 Floors

Generated 19 Mar 2026

0/100

Safety Score

Structural Assessment: Moderate Risk

2 critical patterns detected. Soft storey at level 2 requires immediate structural intervention. Foundation bearing capacity marginally below threshold.

IS 456:2000IS 1893:2016Eurocode 2

AI Structural Checks

Column Axial Capacity

SF 2.18✓ PASS

Beam Shear Design

SF 1.74✓ PASS

Foundation Bearing

SF 1.21⚠ WARN

Seismic Resistance

SF 0.83✗ FAIL

Slenderness Ratio

SF 1.95✓ PASS

Detected Patterns

Soft Storey — Level 2Critical

Floating Column — Grid B2Critical

Transfer Beam — Level 3Warning

Full report locked

AI recommendations + failure sequences + PDF

Unlock Full Report

Features

Professional analysis, zero software

Everything a structural engineer needs — browser-based, instant, and globally applicable.

Results in < 2 Seconds

No waiting, no uploads — paste JSON a full structural safety score.

Multi-Code Compliance

IS 456, IS 1893, Eurocode 2 (EN 1992), ACI 318, and IS 13920.

8 Failure Pattern Detectors

floating columns, soft storey, transfer beams, P-Delta, torsional irregularity and more.

PDF Report

AI-composed, print-ready engineering report with code references, critical zones, and intelligent recommendations.

Any Building. Any Country.

RC frame analysis worldwide — residential, commercial, industrial, any floor count, any shape.

Smart 2D Layout Visualisation

Plan view of your column-beam grid rendered live from your JSON data.

Pricing

Simple, transparent

Preview free. Pay once for the full PDF report.

Free

structural preview

Structural safety score
AI Pass/Fail on 4 checks
First detected pattern
Smart 2D layout viewer

Analyse Free

Common questions

Analyse your building free — right now

Is your building safe?

Paste your building JSON above and find out in under 2 seconds — no account required for the free preview.

Start Free Analysis

See Sample Report

Works for RC frames worldwide · No software · No credit card for preview