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Live SolverStructural analysis for beams & girders.
Structural analysis for beams & girders.
In the browser.
Model simple & continuous deck girders with real-time shear, bending moment, and deflection profiles. Probe any station interactively.
Workspaces2 tools
Sections
2,657
AISC and API 5L
Install
None
Free beam solver
01 · How it works
Two workspaces, one model, one report
Pick the workspace that matches what is on the drawing. A section from Section Properties opens in the Beam Calculator, and every result goes into a calculation report.
Deck girders, stiffeners, skid beams, pipe-rack beams and crane runways. Any supports and loads, with reactions, shear, moment, deflection and stress at every station.
Try the beam below Open the workspaceI and T sections, channels, angles, circular and rectangular sections, hollow or solid, or a size from the AISC and API 5L tables. Area, inertia, section moduli, radii of gyration and yield and plastic capacity, sent on to the Beam Calculator.
Try a section below Open the workspace- 01ModelSpan, supports, loads and section
- 02SolveReactions, V, M, slope, δ and stresses
- 03CheckPeaks with their x, and the stress contours
- 04RedesignChange the section and re-run instantly
- 05ReportA PDF with tables and diagrams
02 · Beam Calculator
Change a value. Watch the beam re-solve.
Live beam · Beam Calculator solverE = 210 GPa · kN · m · MPa
Support case
R at x = 0
120.0 kN
M = 0.0 kN·m
R at x = L
120.0 kN
M = 0.0 kN·m
|V| max
120.0 kN
at x = 0.00 m
M max (sagging)
280.0 kN·m
at x = 4.00 m
M min (hogging)
0.0 kN·m
none
σ b, max
250 MPa
Sx = 1 120 cm³
δ max
-34.5 mm
L/232 at x = 4.00 m
Any support layout
Pinned, roller, fixed, rocker, link and guided, level or inclined; continuous spans and overhangs.
Any load pattern
Point loads, moments, uniform, triangular and trapezoidal.
Results at every station
Reactions, V, M, slope, δ and stresses with max, min and x.
Catalogue or custom section
AISC and API 5L, or one from its dimensions.
03 · Stresses
Through the depth, along the span
Stress contour · simply supported · W18×40
0285683111139167194222250
MPa
σ b · extreme fibre
250 MPa
at x = 4.00 m, y = ±h/2
τ · neutral axis
37.2 MPa
at x = 0.00 m
σ vm · MX
249.8 MPa
x = 4.00 m, y = 228 mm
Formulas
σ = −M·y/I · τ = V·Q/(I·b)
σ vm = √(σ² + 3τ²)
Three stress views
von Mises, bending and shear through the depth.
Nine bands, MX / MN tags
Coloured by magnitude, each peak marked with its sign.
Section A–A
Move a cut along the span: σx, τxy and σvm through the depth.
Same in the report
The PDF prints the contour exactly as it is on screen.
05 · Section Properties
Any cross-section, every property
Section properties · livemm · cm² · cm³ · cm⁴
Shape
| Property | Value |
|---|---|
| A | 51.0 cm² |
| Cy from bottom | 150.0 mm |
| Ix | 7 870 cm⁴ |
| Iy | 591 cm⁴ |
| Sx top / bottom | 525 / 525 cm³ |
| Zx | 592 cm³ |
| rx / ry | 12.42 / 3.40 cm |
| Mass (steel) | 40.1 kg/m |
Standard shapes
I, T, channel, angle, circular and rectangular, hollow or solid.
2,657 catalogue sections
AISC and API 5L.
Capacity and stiffness
Axial yield, yield and plastic moments, EA and EI from your Fy and E.
Into the Beam Calculator
The section opens in a beam, ready to load.
06 · Reports
The solved model becomes a calculation record
- Cover sheet with sign-off
- Your logo on Professional
- Captions below tables and figures
- Kannamwar footer on every page
[Company]Project[Project]
Document TitleBeam Analysis Report – [Model Name]
Document Number[KE-000-CAL-001]
Revision00
00yyyy-mm-ddIssued for Information15[Name][Name][Name]
RevDateDescriptionPagesPreparedCheckedApproved
This document is confidential and the proprietary property of [Company]. Unauthorised use, reproduction or disclosure of this document, in whole or in part, is strictly prohibited.
[KE-000-CAL-001]www.kannamwar.comPage 1 of 15
www.kannamwar.comPage 1 of 1507 · Verification
Results you can check yourself
- Beam checks pass152 / 152every diagram and reaction
- Reference models pass19 / 19Beam Calculator solver
| Case | Quantity | Reference | Ref. value | Solver | Rel. diff. |
|---|---|---|---|---|---|
| Simply supported · UDL | M max | wL²/8 | 90 kN·m | 90 kN·m | 9.5e-16 |
| Simply supported · point at midspan | M max | PL/4 | 250 kip·ft | 250 kip·ft | 1.5e-14 |
| Cantilever · UDL | M at root | wL²/2 | -250 kip·ft | -250 kip·ft | 5.7e-16 |
| Fixed–roller · UDL | M at fixed end | wL²/8 | -125 kip·ft | -125 kip·ft | 9.1e-16 |
| Fixed–fixed · UDL | M at supports | wL²/12 | -83.3333 kip·ft | -83.3333 kip·ft | 8.5e-16 |
| Three-span continuous · UDL | M at support | 0.1wL² | -25 kip·ft | -25 kip·ft | 6.3e-15 |
| Simply supported · trapezoidal load | M max | Reference engine | 105.988 kip·ft | 105.989 kip·ft | 4.3e-7 |
Beam tolerance 1e-4 of each peakReactions exact
08 · Platform
Everything around the solver
Steel section library
2,657 sections from AISC and API 5L, with filters, a compare tray and datasheets.
Unit converters
74 quantities, 604 units and 17 calculators, with exact factors and sources.
Saved work
Saved models, project folders and reusable sections.
Teams
Shared projects and seats under one subscription.
PDF reports
From every workspace, with your logo on Professional.
09 · Pricing
Free to solve. Paid to keep and share.
7 days of Professional free · no credit card
Free
₹0after 7 days of full accessStart freeSolve with
- Determinate and indeterminate beams
- Section properties of standard shapes and steel library sections
- Beam deflection, slope and stress; steel library sections
- Steel catalogue and unit converters
Starter
₹799per monthChoose StarterEverything in Free, plus
- Commercial use
- Saved models and reusable sections10 + 10
- PDF reports10 a month
Professional
Popular₹1,199per monthChoose ProfessionalEverything in Starter, plus
- Saved models and reusable sectionsUnlimited
- PDF reportsUnlimited, your logo
- Project folders
Team
₹1,199per user per month, 3+ seatsStart a TeamEverything in Professional, plus
- One company subscription, organisation console and seats
- Seats for your engineers3 to 25
Prices in Indian rupees (₹), inclusive of applicable taxes. Pricing page
| Feature | Free ₹0 after 7 days of full access | Starter ₹799 per month | ProfessionalPopular ₹1,199 per month | Team ₹1,199 per user per month, 3+ seats |
|---|---|---|---|---|
| Determinate and indeterminate beams | ✓ | ✓ | ✓ | ✓ |
| Section properties of standard shapes and steel library sections | ✓ | ✓ | ✓ | ✓ |
| Beam deflection, slope and stress; steel library sections | ✓ | ✓ | ✓ | ✓ |
| Commercial use | — | ✓ | ✓ | ✓ |
| Saved models and reusable sections | — | 10 + 10 | Unlimited | Unlimited |
| PDF reports | — | 10 a month | Unlimited, your logo | Unlimited, your logo |
| Project folders | — | — | ✓ | ✓ |
| One company subscription, organisation console and seats | — | — | — | ✓ |
10 · Before you start
Questions and answers
Still stuck? Contact us
01Is it free to use?
Yes. Every calculation is free and needs no account: determinate and indeterminate beams with deflection and stress, section properties, the steel catalogue and the unit converters. PDF reports and saved work need an account; every account starts with seven days of full Professional access. After that, PDF reports, saved models and commercial use need a paid plan; the pricing page lists exactly what each plan includes.
02What does the beam calculator check?
It takes point loads, uniformly distributed and uniformly varying loads, applied moments, axial loads and torques. It gives the support reactions, and along the whole span the deflection, bending moment, shear force, slope, bending stress at the top and bottom fibres and average shear stress, with the axial force, torque and angle of twist when those loads are applied, each with its maximum, minimum and location, plus 2D and 3D von Mises, bending and shear stress contours.
03How are positions and signs defined?
Positions are measured along the beam as x, from x = 0 at the start to x = L at the end, so 0 ≤ x ≤ L. The axes have their origin (0, 0, 0) at the start of the beam: x along the beam, y upwards and z towards you. A positive load acts downwards and a negative load upwards. Bending stress is + in tension and − in compression.
04How do I know the results are right?
The beam solver is compared with 19 reference models (152 of 152 checks pass).
05Which sections can I use?
Any of the 2,657 catalogued steel sections from the AISC Steel Construction Manual (14th ed.) and API 5L line pipe (browse them in Steel Section Library), or a custom section: choose its shape and enter its dimensions, and the area, second moment of area and fibre distances are calculated for you.
06Do I need to install anything?
No. Every tool runs in the browser.