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All 14 structural & civil calculators
Asphalt Tonnage Calculator
Computes asphalt tonnage from paved area, thickness and mix density, with waste and whole-load ordering. Use it to order paving material.
Steel connectionsBase Plate Anchor Rod Calculator
Draw a column base plate in plan with its anchor rods, then enter the axial load, moment and shear. Get the concrete bearing pressure distribution, the bearing length and neutral axis, each anchor rod's tension and shear, equilibrium checks, and the plate, rod, grout and pedestal quantities and weights, by the elastic rigid-plate method. Statics and quantities only: no plate, weld, anchor or concrete strength check.
Beam analysisBeam Analysis Calculator
Draw a straight beam and its supports (free, pin, roller or fixed, at the ends or anywhere along it), then add point loads and uniform or varying distributed loads, downward or upward. Get every support force and fixed-end moment, the shear, bending moment and deflection along the beam, their largest values and exactly where they occur, the most flexible span against L/360 and L/240 for comparison, and an equilibrium check. Simply supported, overhanging, cantilever, propped, fixed-ended and continuous beams. US or Metric. No strength, stress or design check.
Beam analysisBeam Deflection Calculator
Computes deflection, moment and shear for a simply supported or cantilever beam under point and distributed loads, with span-over-deflection checks. Use it for a first-pass beam check.
Beam analysisComposite Section Calculator
Draw a cross-section, or send its outline and up to five inclusions as rows in FEET (US) or METRES (Metric), not inches, with Y running down; give each inclusion's modular ratio n (its elastic modulus over the outline material's) and a bending moment in kip·ft (Metric: kN·m), and get the transformed section's area, centroid, moments and product of inertia, principal axes, section moduli, radii of gyration and each material's highest and lowest bending stress. The section figures are in in, in², in³ or in⁴ (Metric: mm, mm², mm³ or mm⁴), the stresses in ksi (MPa) and the principal angle in degrees; the drawing's own areas (gross, net and each inclusion) are in sq ft (m²). The workbook trusts the drawing to keep inclusions inside the outline and apart, and checks it cheaply itself: an inclusion outside the outline or on top of another is refused, but not every partial overlap or self-crossing drawing.
Earthwork & gradingEarthwork Cut Fill Calculator
Computes cut and fill volumes by the average-end-area method with shrinkage and swell, plus the haul and mass balance. Use it to estimate earthwork quantities.
Stormwater runoffRational Method Runoff Calculator
Computes peak stormwater runoff by the rational method from a weighted runoff coefficient, rainfall intensity and drainage area, with time of concentration. Use it for small-watershed drainage design.
Beam analysisSectional Properties Calculator
Draw a cross-section, or send its outline and up to five holes as rows in FEET (US) or METRES (Metric), not inches, with Y running down, and get its area, centroid, moments and product of inertia, principal moments and angle, elastic and plastic section moduli, radii of gyration, an approximate torsion constant and its steel weight per length. The section figures are in in, in², in³ or in⁴ (Metric: mm, mm², mm³ or mm⁴), the weight per length in lb/ft (kg/m) and the principal angle in degrees; the drawing's own areas (gross, net and each hole) are in sq ft (m²). The workbook trusts the drawing to keep holes inside the outline and apart, and checks it cheaply itself: a hole outside the outline or on top of another is refused, but not every partial overlap or self-crossing drawing.
Column designSteel Column Capacity Calculator
Computes the axial capacity of a steel column across both buckling branches, in LRFD and ASD, against the applied load. Use it for a first-pass column check.
Steel quantitiesSteel Mezzanine Estimator
Takes off and estimates a steel mezzanine drawn on StructuralCanvas: every member's length, section and weight; the deck area by deck type (grating, plate or composite metal deck), less openings; the stairs' flights, rise, run and stringer length; and the guard and handrail lengths. Add your unit prices for the cost of steel by weight, deck by area, stairs each and railings by length.
Steel quantitiesStock Cutting Plan Calculator
Plans how to cut up to 80 pieces from steel stock bars of up to five lengths, allowing for the saw kerf. Get the bars used, each bar's pieces and positions for a bar diagram, the kerf loss, offcut and waste of each bar and in total, the utilization, the remnants worth keeping and, with your prices, the cost. The plan is first-fit decreasing, a stated rule of thumb.
Storm drainageStorm Pipe Sizing Calculator
Sizes a storm drainage pipe by Manning's equation, reporting full-flow capacity, velocity and the recommended diameter. Use it to size gravity storm pipe.
Structural analysisTruss Analysis Calculator
Analyses a plane pin-jointed truss drawn on StructuralCanvas, up to 30 joints and 60 members on pins and rollers with joint loads. Get every member's axial force in tension or compression and its stress, the support reactions, the joint displacements and an equilibrium check, for determinate and indeterminate trusses, by the direct stiffness method. No buckling or strength check.
Steel quantitiesWarehouse Steel Takeoff Calculator
Takes off the steel of a structure drawn on StructuralCanvas, such as a warehouse, shed or canopy frame: every member's length from its end nodes, its section's idealized area from the outline you set, and its weight from the density you type. Get the count, length and weight by member type, by section and by group, and the totals in pounds and tons or kilograms and tonnes, for up to 1,000 members. Optionally price the steel and the roofing and cladding sheets at your own rates. US or Metric units. No connections or structural checks.