Engineering Tools
Free structural calculators and solvers built in-house — ACI, AISC and ASCE tools that run right in your browser.
Most used
Multi-Span Beam Analysis
Continuous beams, hinges, springs, settlements, thermal — full FEM.
Open Tool→ACI 318-25 Spread Footing Design
ACI 318-25Isolated spread footings per ACI 318-25 SI — bearing, punching, one-way shear, flexure, overturning, sliding, bar fit, dev. length. 2D plan + cross-section + 3D viewer + print report. Auto-design sizes B/L/T and picks rebar.
Open Tool→Steel
8 toolsSteel Member Design
AISC 360-22Axial, bending, shear and combined-action checks per AISC 360-22 (LRFD) for W, S, HSS and pipe sections — full section library, limit-state capacities, utilisation and governing clause. Validated against AISC Manual values.
Open Tool→Steel I-Beam Design
CSA S16-14Flexure, shear, deflection and lateral-torsional buckling for hot-rolled W and S I-sections per CSA S16-14 (LSD) — full Canadian metric shape library, section classification, Mr with LTB curve, Vr and serviceability. Validated against CISC Handbook values.
Open Tool→Steel Angle Design
AISC 360-16Tension, compression and flexural capacity of single (L) and double (2L) hot-rolled angles per AISC 360-16 (LRFD) — full L/2L library, D2/D3 tension with shear-lag, E5 effective-slenderness compression, E4/E6 double-angle FTB, and F10/F9 flexure with principal-axis LTB. Validated against AISC Design Examples.
Open Tool→Steel I-Beam Design
AISC 360-16Flexure, shear, deflection and lateral-torsional buckling for hot-rolled W and S I-sections per AISC 360-16 (LRFD) — full US shape library, Table B4.1 classification, Ch. F2 flexure with the φMn–Lb curve (Lp/Lr), Ch. G2 shear and serviceability. Validated against AISC Manual Table 3-2.
Open Tool→Steel Channel Design
AISC 360-16Bending, shear and buckling checks for hot-rolled C and MC channels per AISC 360-16 (LRFD) — full US channel library, Table B4.1 classification, Ch. F2 major flexure with the channel c-factor and φMn–Lb curve, F6 minor flexure, G2.1(b) shear (φv 0.90), and E3/E4 flexural-torsional compression buckling. Validated against AISC Design Example F.2.
Open Tool→Steel Plate Design
AISC 360-22Minor-axis (and major-axis) bending and shear capacity of flat plates and rectangular bars per AISC 360-22 (LRFD) — Section F11 flexure (yielding + major-axis LTB with the Lb·d/t² curve) and Section J4.2 shear (yielding φ1.00 + rupture φ0.75), with section properties and governing limit state.
Open Tool→I-Beam Load Capacity Check
AISC 360-22Quick factored-load capacity of a W-section at a given span and bracing — picks the controlling limit state.
Composite Beam & Column Design
AISC 360-22 Ch. ISteel-concrete composite beams with shear studs, plus encased and filled composite columns.
Cold-Formed Steel
2 toolsAISI S100-16 Cold-Formed Member Design
AISI S100-16Cold-formed steel members per AISI S100-16.
AISI S100-16 Purlin Design
AISI S100-16Steel purlins per AISI S100-16.
Concrete
11 toolsACI 318-19 Concrete Shear Wall Design
ACI 318-19Reinforced concrete structural walls per ACI 318-19 — in-plane shear (§11.5.4), axial-flexure P-M interaction, minimum reinforcement, simplified axial and special boundary elements (§18.10.6), with the full interaction diagram. Validated against ACI clause arithmetic and PCA/StructurePoint values.
Open Tool→ACI 318-19 Concrete Column Design
ACI 318-19Reinforced concrete columns per ACI 318-19 — rectangular tied and circular spiral, uniaxial & biaxial P-M interaction (Bresler / PCA load contour), non-sway slenderness magnification (§6.6.4) and detailing limits, with the full interaction diagram. Validated against ACI hand calcs and StructurePoint values.
Open Tool→CSA A23.3-14 Concrete Slab Design
CSA A23.3-14RC slab resistance per CSA A23.3-14.
ACI 360 R-06 Slab on Grade Design
ACI 360 R-06Slab on grade per ACI 360 R-06.
ACI 318-19 Reinforcement Development & Lap
ACI 318-19Development and lap length per ACI 318-19.
Two-way Slab Design
ACI 318-19One-way + two-way RC slab per Method 3 (9 cases) — moments, As, deflection, punching, crack control.
Open Tool→ACI 318-19 Punching Shear Design
ACI 318-19Slab punching shear per ACI 318-19.
Open Tool→ACI 318-19 Concrete Corbel Design
ACI 318-19Reinforced concrete corbels per ACI 318-19.
ACI 318-19 Flexural Crack Width
ACI 318-19Service-load crack width on RC beams and slabs using Frosch and Gergely-Lutz formulations — reinforcement stress, cover and bar spacing inputs.
ACI 318-25 RC Beam Design
ACI 318-25Reinforced concrete beam design per ACI 318-25 SI — flexure (singly + doubly + T-beam), shear (Vc + Vs + max stirrup spacing), Branson deflection and §24.3 crack control. 50 unit tests against first-principles ACI formulas.
Open Tool→ACI 318-25 Flexure — Design & Analysis
ACI 318-25Singly-reinforced rectangular flexure (Tercero Tablada method, metric): design the steel from Mu (Rn → ρ → As + commercial-bar selection) or check capacity φMn from placed steel — with cross-section and strain diagrams.
Open Tool→Timber
4 toolsNDS® 2018 Wood Member Design
NDS® 2018Structural wood members per NDS® 2018.
CSA O86-14 Timber Member Design
CSA O86-14Structural timber members per CSA O86-14.
AWC 2021 Floor Joist Span Calculator
AWC 2021Max joist span per AWC design values.
Sloped Rafter Span Calculator
NDS® 2018 / AWCPitched-roof rafter sizing under combined dead, snow, live and ceiling loads — bending, deflection and bearing length per NDS allowable design values.
Foundations
7 toolsACI 318-25 Strip Footing Design
ACI 318-25RC strip / wall footings per ACI 318-25 SI — same engine as spread footings, with transverse-only flexure for 1 m strips.
Open Tool→ACI 318-25 Combined Footing Design
ACI 318-25Two-column rectangular combined footings per ACI 318-25 §13.3.4 + Wight Ex 15-5. Resultant centring → uniform pressure, BMD/SFD beam analysis, two-way + one-way shear, longitudinal + transverse flexure, bearing-interface + bar fit + dev length checks, full auto-design driver, 3D viewer + branded print report.
Open Tool→ACI 318-25 Mat (Raft) Foundation Design
ACI 318-25Multi-column rectangular mat foundations per ACI 318-25 §13.3.4 (rigid method). Bilinear corner pressures, per-column two-way shear with auto-detected αs, bearing-interface, bar fit for 4 mats, strip-method flexure (X + Y), full auto-design driver, 3D viewer with column array + branded print report.
Open Tool→Bearing Capacity Calculator
Bearing capacity using FS approach.
Lateral Pile Stability
Embedment and strength for lateral pile stability.
Screw Pile Design
AISC 360-16 / IBC 2021Steel screw piles per AISC 360 & IBC 2021.
Retaining Wall Design
ACI 318 / RankineCantilever retaining wall stability + ACI 318 design.
Open Tool→Aluminum
4 toolsADM 2020 Aluminum Member Design
ADM 2020Aluminum members per ADM 2020.
CSA S157-17 Aluminium Member Design
CSA S157-17Aluminium members per CSA S157-17.
ADM 2015 Aluminum Member Design
ADM 2015Aluminium members per ADM 2015.
Aluminum Beam Capacity Check
ADM 2020Quick allowable load on extruded aluminum sections (I, channel, angle, tube) under flexure — selects the controlling limit state from ADM Table B.4.
Connections
9 toolsAISC 360-16 Blodgett Weld Capacity
AISC 360-16Weld groups per AISC 360-16.
AISC 360-16 Bolt Group Capacity
AISC 360-16Bolt groups per AISC 360-16.
CSA S16-24 Bolt Group Capacity
CSA S16-24Bolt groups per CSA S16-24.
AISC 360-16 Lifting Lug Design
AISC 360-16Steel lifting lugs per AISC 360-16.
AISC 360-16 Kicker Brace Connection
AISC 360-16Single-angle kicker brace per AISC 360-16.
AISC 360-22 Bolt Group Coefficient
AISC 360-22Bolt group coefficient per AISC 360-22.
Shear Lug Design
ACI 318-25 / AISC DG 1Embedded steel plate shear lug under anchor bolt shear transfer — concrete bearing, lug plate flexure, base-plate weld and shear-friction at the lug-concrete interface.
Bolted Splice Connection
AISC 360-22Beam or column splice with cover plates carrying axial + shear + moment — slip-critical and bearing-bolt limit states plus plate yielding, rupture and block shear.
Steel Base Plate & Anchor Rod Design
AISC DG 1 / 360-22 + ACI 318-25Column base plate per AISC Design Guide 1 (3rd Ed.) + 360-22 — concrete bearing, plate flexion, anchor tension and ACI 318-25 Chapter 17 concrete pullout, breakout, anchor shear and weld design.
Open Tool→Scaffolding
1 toolAISC 360-16 Scaffold Member Design
AISC 360-16Scaffolding members per AISC 360-16.
Loading
7 toolsASCE 7-22 Load Generator
ASCE 7-22Complete wind, snow (incl. drift), seismic and load combinations from the site address — USGS-connected.
Open Tool→NBCC 2015 Multi-Roof Snow Drift
NBCC 2015Snow loads per NBCC 2015.
Load Combination Generator
ASCE 7 / IBC load combinations (LRFD + ASD).
ASCE 7-16 Gust-Effect Factor (Imperial)
ASCE 7-16Gust-effect factors per ASCE 7-16 (Imperial).
ASCE 7-16 Gust-Effect Factor (Metric)
ASCE 7-16Gust-effect factors per ASCE 7-16 (Metric).
ASCE 7-22 Gust-Effect Factor (Imperial)
ASCE 7-22Gust-effect factors per ASCE 7-22 (Imperial).
ASCE 7-22 Gust-Effect Factor (Metric)
ASCE 7-22Gust-effect factors per ASCE 7-22 (Metric).
Analysis
12 toolsColumn Analysis
Analyse columns for axial and bending.
Section Properties
Section properties for any shape.
Open Tool→Beam Analysis
Quick and accurate single-beam analysis with shear, moment, and deflection diagrams. Direct-stiffness (FEM) Euler-Bernoulli solution for any support layout under point, distributed and moment loads. Validated against closed-form beam solutions.
Open Tool→Column Buckling Load
Critical buckling load for compression columns.
2D Stiffness Method Analysis
Stiffness matrix + force vector for 2D elements.
Cable Sag Analysis
Pre-tension for a specified cable sag.
Cable Tension Analysis
Cable tension for structural applications.
Plate Buckling Stress
Buckling stresses for steel plates.
Tributary Area Load Distribution
Tributary loads and beam analysis.
2D Pin-Jointed Truss Solver
Direct stiffness method for plane trusses — member axial forces, reactions and joint displacements from any combination of nodal loads and supports.
2D Plane Frame Solver
Full FEM solver for plane frames with moment-resisting joints — beam-column elements, distributed and point loads, M/V/N diagrams and deflected-shape plot.
Structural 3D FEA
3D frame and shell finite-element analysis with libraries of standard sections, multiple load cases, P-Δ effects and modal / time-history analysis.
Utility
8 toolsStructural Unit Converter
Convert length, force, temperature, section units.
Young's Modulus Calculator
Young's Modulus from stress and strain data.
Poisson's Ratio Calculator
Poisson's Ratio from strain or stiffness.
Concrete Stress-Strain Calculator
Mander 1988Stress–strain per Mander's (1988) theory.
Sheet Metal K-Factor Calculator
K-factor for sheet metal bending.
Bolt Torque Calculator
Required torque to tighten a bolt.
Moment of Inertia & Centroid
Quick I, S, Z and centroid for primitive cross-sections — rectangle, circle, hollow tube, I, channel, angle and T — with units toggle.
Steel Section Database
AISCSearchable lookup of W, HSS, C, L, MT and equivalent profiles — geometric, torsional and classification data ready for design checks.
Other
3 toolsFlooring Cost Calculator
Calculates the cost of flooring.
Roof Pitch Calculator
Calculate the pitch of a roof.
Hooke's Law Calculator
Force in a spring.
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