Free calculators17 free structural engineering calculators
Design beams, columns, slabs, footings, walls, steel members and connections — to SANS, BS 8110 and Eurocode — with live diagrams, full code checks and printable calc sheets. Free.
The full STATIX 3D modeller — with native CBFEM
Model the whole frame in 3D, then run the analysis, member design and real component-based FE connection checks in one offline tool — no per-module licences, no separate CBFEM subscription. The calculators below already run the same validated engine; the full suite is next.
RC Beam
Span + loads → shear/moment/deflection diagrams, reinforcement detailing, continuous spans and full ULS/SLS checks.
RC Column
Axial + biaxial moment on a live N-M interaction diagram, reinforcement section, short/slender and steel checks.
Pad Footing
Least-cost plan size, soil bearing-pressure diagram, flexure, one-way and punching shear, all auto-sized.
Two-Way Slab
Finite-difference plate solver — Mx / My moment fields, colour contours, top & bottom steel each way and deflection.
Retaining Wall
Cantilever wall — earth-pressure diagram, overturning / sliding / bearing factors of safety and RC design.
Steel Member
Compression, bending and shear resistances with an N-M interaction curve and beam-column check for UB/UC sections.
Base Plate
Column base under N + M — bearing pressure, effective area, anchor tension with concrete cone and weld checks.
Wind Load
Peak velocity pressure, terrain exposure and external/internal pressures on every wall and roof zone.
Section Properties
Area, second moments, radii of gyration, elastic & plastic moduli, torsion and warping — any section or a library profile.
End-Plate Connection
Bolted moment end-plate — T-stub bolt-row resistances, column-web checks and the joint moment resistance Mj,Rd.
Eave Haunch
Portal-frame eaves haunch — deepened end-plate connection with the lever-arm gain and haunch-flange compression.
Apex Haunch
Portal-frame ridge — symmetric rafter-to-rafter haunched end-plate connection with the lever-arm gain, no column.
Fin-Plate (Shear)
Bolted fin-plate shear connection — eccentric bolt group, plate shear / bending / block tearing and the fillet weld.
Pile Cap
2/3/4-pile caps under column load — pile reactions, truss (strut-and-tie) banded reinforcement, beam & punching shear and bar anchorage.
Crack Width & Deflection
Standalone SLS check — flexural crack width and long-term (creep + shrinkage) deflection for RC beams and slabs, by both the BS and EN methods.
Timber Beam
Sawn or glulam beam — bending with lateral-torsional stability, shear, bearing and instantaneous/creep deflection. Grade stresses are your inputs.
Masonry Wall
Loadbearing wall — characteristic strength, slenderness & eccentricity capacity-reduction factor, vertical resistance and lateral (wind) bending.
Cold-Formed Purlin
Lipped C/Z purlin by the Direct Strength Method — local, distortional (Lau & Hancock, CUFSM-validated) and global buckling, shear, combined action and deflection.
These aren't toy calculators
Every one runs the same engine as the full STATIX suite — validated against 221 closed-form and code benchmarks across analysis, design and connections. The 3D modeller with native CBFEM is coming; be first in line.
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