Civil & structural engineering
Structural mechanics, steel, concrete, timber, masonry, connections, loads and envelope checks.
Structural basics
Section Properties Calculator
Calculate area, second moments of area, section moduli and radii of gyration for common idealized sections.
Browse calculatorsProfessional checksSteel Beam Preliminary Check
Elastic simply-supported beam check for UDL loading using user-entered section properties, material values and design factors.
Browse calculatorsProfessional checksLoad Combination Calculator
Build transparent ULS and SLS combinations from permanent and variable actions with user-entered partial and combination factors.
Browse calculatorsSteel members
EC3 Steel Beam Screening Check
EC3-style beam screening using user-entered section properties and χLT; checks bending, shear and elastic deflection.
Browse calculatorsProfessional checksEC3 Column Buckling Check
EC3-style flexural buckling reduction using Euler critical load, non-dimensional slenderness and user-selected imperfection factor α.
Browse calculatorsProfessional checksAISC 360-22 Beam Section Check
AISC 360-22 section-level yielding/shear screening using Zx, web shear area and user-entered resistance factors.
Browse calculatorsProfessional checksAISC 360-22 Column Compression Check
AISC 360-22 compression-column screening using KL/r, Euler stress and the standard inelastic/elastic column curve.
Browse calculatorsProfessional checksCSA S16:24 Steel Beam Preliminary Check
Canadian steel-beam screening with editable resistance and stability modifiers.
Browse calculatorsProfessional checksCSA S16:24 Compression Member Organizer
Compression screening with Euler reference and a user-verified CSA stability modifier χ.
Browse calculatorsProfessional checksGB 50017-2017 Steel Beam Preliminary Check
Chinese steel-beam screening using entered design strengths and stability coefficient φb.
Browse calculatorsProfessional checksGB 50017-2017 Compression Member Organizer
Compression screening using a user-entered stability coefficient φ.
Browse calculatorsConnections & anchoring
Bolt Group Calculator
Elastic in-plane bolt-group force distribution for direct shear plus torsional moment about the group centroid.
Browse calculatorsProfessional checksFillet Weld Preliminary Check
Preliminary fillet-weld resistance check using total effective weld length and selectable user / EC3-style / AISC-style strength basis.
Browse calculatorsProfessional checksSteel Base Plate Preliminary Check
Check full-contact concrete bearing pressure and a simple cantilever-strip plate bending estimate for a rectangular steel base plate.
Browse calculatorsProfessional checksEN 1992-4 Anchor Capacity Organizer
Organize tension and shear demand against user-entered EN 1992-4 / ETA resistance components and partial factors.
Browse calculatorsProfessional checksACI 318-25 Anchor Capacity Organizer
Organize factored anchor demand against user-entered ACI 318-25 nominal group strengths and strength-reduction factors.
Browse calculatorsConcrete
Punching Shear Demand & Capacity Helper
Calculate critical perimeter, punching shear stress and utilization using a user-entered design shear resistance.
Browse calculatorsProfessional checksCSA A23.3:24 Punching Shear Organizer
Punching-shear demand compared with a user-verified CSA factored resistance vr.
Browse calculatorsProfessional checksGB/T 50010-2010 (2024) Punching Shear Organizer
Punching-shear demand for Chinese concrete design compared with a verified resistance.
Browse calculatorsTimber & masonry
CSA O86:24 Timber Beam Demand & Resistance Organizer
Rectangular timber-beam demand check using user-verified factored bending and shear resistances.
Browse calculatorsProfessional checksCSA S304:24 Masonry Wall Stress Organizer
Axial-plus-bending wall stress organizer with user-verified masonry compression and tension resistance limits.
Browse calculatorsLoads, roofing & envelope
NBCC 2025 Load Combination Workspace
Editable Canadian load-combination workspace for D, L, S, W and E effects.
Browse calculatorsProfessional checksChina Load Combination Workspace
Editable load-combination workspace for Chinese building design.
Browse calculatorsProfessional checksNBCC 2025 Wind Pressure Workspace
Transparent wind-pressure workspace using reference velocity pressure and editable NBCC pressure factors.
Browse calculatorsProfessional checksNBCC 2025 Roof Snow Load Workspace
Roof snow load workspace with editable ground snow/rain values and NBCC roof modification factors.
Browse calculatorsProfessional checksGB 50009-2012 Wind Pressure Workspace
Chinese wind-pressure workspace using basic wind pressure and editable height, shape and gust factors.
Browse calculatorsProfessional checksGB 50009-2012 Roof Snow Load Workspace
Simple Chinese roof snow workspace using basic snow pressure and an editable roof distribution coefficient.
Browse calculatorsProfessional checksTrapezoidal Sheet Preliminary Check
Single-span sheet check using manufacturer/user effective section properties, design resistance and service deflection.
Browse calculatorsProfessional checksCladding Fastener Load Calculator
Convert design wind pressure or suction into tributary force per cladding fastener and support line load.
Browse calculatorsProfessional checksPurlin Tributary Load Calculator
Convert roof area loads and purlin spacing into design line load, reactions and simply-supported moment.
Browse calculators