Struxt3D
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Structural analysis and design, in 3D, in minutes

Pick a structure, set its size and loads, and Struxt3D analyses it and designs every member to your code — with the full calculations to show for it.

Start a model Learn analysis and design

21 structure templates · 6 design code families · calculation reports and shop drawings

Utilization · Envelope0 – 1.00All members pass

From a blank page to a checked design in five steps

Struxt3D asks only what it needs. Self-weight, load combinations and sensible sections are filled in for you.

Pick a template

Frame, flat slab, core, portal shed, bridge, tower, raft and more.

Set the size

Spans, bays, storeys and heights. The 3D model updates as you type.

Choose materials

Design code, steel, concrete or timber grades and member sections.

Add supports and loads

Floor use, finishes, wind and earthquake from the code's own rules.

Analyse and design

Forces, deflections and code checks on the model, then size it automatically.

Everything you need for a first, sound answer

A 3D finite element solver with beams, trusses, cables and plates, joined to design checks taken from the codes.

3D analysis in the browser

Linear static and response-spectrum analysis with beams, trusses and shell plates, solved on your own computer in a few seconds.

Results you can read

Deflected shape, axial, shear and moment diagrams, slab moments, reactions, vibration modes and utilization colours on the model.

Code design checks

Steel, reinforced concrete and timber members, slabs, shear walls, pad footings, composite beams and steel connections.

Automatic sizing

Struxt3D picks the lightest section that passes strength and deflection, and thickens slabs that fail.

Calculation reports

Step-by-step calculations with clause references for the whole model or a single element, as PDF or Word.

Reinforcement and drawings

See the designed bars in 3D, inspect each steel connection, and produce shop drawings from the design.

Design to the code you work with

Load combinations, live loads, wind, seismic spectra, materials and resistance factors follow each code family.

EurocodeEN 1990–1998 AISC / ACIASCE 7, AISC 360, ACI 318 KDSKorean Design Standards CSANBCC, S16, A23.3 AS/NZS1170, 4100, 3600 NSCP 2015Philippines, 7th edition

Learn analysis and design as you go

Short, practical tutorials that explain the engineering and show it in the app — from how a beam carries load to designing a shear wall core.

Element designHow to design a steel beamLearn steel beam design step by step: bending, shear, lateral-torsional buckling and deflection, with a worked Eurocode 3 example and the AISC 360 equivalents.Beginner14 minElement designHow to design a reinforced concrete beamReinforced concrete beam design explained: bending steel, shear links, minimum bars, deflection and support bars, with a worked Eurocode 2 example and ACI 318 notes.Beginner15 minElement designHow to design a steel columnSteel column design explained: slenderness, buckling curves, effective length and combined axial force and bending, with a worked Eurocode 3 example and AISC 360 formulas.Intermediate16 minElement designHow to design a reinforced concrete columnLearn RC column design: the axial force–moment interaction diagram, slenderness, biaxial bending and ties, with a worked ACI 318 example and Eurocode 2 notes.Intermediate17 minElement designHow to design a concrete slabConcrete slab design explained: one-way, two-way and flat slabs, Wood–Armer moments, bar meshes, punching shear and deflection, with a worked Eurocode 2 example.Intermediate18 minElement designHow to design a shear wallReinforced concrete shear wall design explained: piers, in-plane bending, shear reinforcement and boundary elements, with a worked ACI 318 example for a core wall.Advanced16 minElement designHow to design a pad footingPad footing design step by step: size the base for the allowable bearing pressure, then check punching shear, one-way shear and bending, with a worked ACI 318 example.Beginner14 minElement designHow to design steel connectionsSteel connection design explained: fin plates, end plates, base plates, gussets and splices, bolt groups and welds, with a worked Eurocode 3 fin plate example.Intermediate17 minElement designHow to design a composite beamComposite steel–concrete beam design explained: effective width, plastic moment, shear studs, unshored construction and floor vibration (AISC DG11), with a worked AISC 360 example.Advanced16 minElement designHow to design timber membersGlulam beam and column design to Eurocode 5 explained: kmod, γM, bending, shear, lateral-torsional buckling and column buckling, with worked GL24h examples.Beginner13 min

See all tutorials

Start from a structure, not a blank grid

Each template builds a complete, connected model with supports, groups and loads. Change the numbers and it rebuilds itself.

BuildingsMulti-storey frameMoment frame on a rectangular grid with secondary beams, floor slabs and cladding.Open in the appTutorial
BuildingsFlat slab buildingColumns carrying flat slabs, analysed as plates: no beams, the slab spans between the columns.Open in the appTutorial
BuildingsShear wall corePerimeter frame around a central concrete core; the core walls are analysed as plates and take the sway.Open in the appTutorial
BuildingsStairDog-leg steel stair: stringers, half and floor landings framed by landing beams on posts.Open in the appTutorial

All 21 templates

Model your first structure now

No account, no download. Your model stays in your browser until you save it.

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