Early load checks still get done the hard way — and every manual step is a place for an error to hide.
Every clip below is the actual product, captured as-is. Watch the full demo →
Click columns onto the floor and tributary cells resolve live — every reaction recomputes with each support you place.
Start a blank project →Flip to Results view: every element carries its load right on the drawing, and one switch swaps Service for Factored — governing combination named.
Open this exact project →3D review explodes the storeys apart. Line-load ribbons size themselves by kN/m, and load-flow particles trace gravity down to the foundation.
Open this exact project →The Section tab is the calc sheet: each storey's own load joins what arrives from above, and the running ΣV walks down to the foundation.
Open this exact project →Each step is visual and reversible. Move a support and every tributary area and reaction updates live — including the floors below.
Sketch a floor outline on the grid, or drop in a DXF/PDF and trace over it with snapping.
Drop columns, walls and beams, then assign dead, live, roof, wall and point loads.
StructLoads splits the plan along midspans and colours each support's catchment — instantly.
Clean PDF and Excel reports with per-support breakdowns and the formulas behind them.
Footings take their positions on the grid.
Columns rise — the vertical load path, storey by storey.
Slabs land level by level. The structure is ready to carry.
Loads arrive — dead, live, roof — raining onto every floor.
Every kilonewton flows down the columns into the foundation.
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Midspan-accurate catchment areas, recoloured the moment you move a support — with one-way strips when framing calls for it.
Stack floors and watch reactions accumulate to the foundations — transfer beams, live-load reduction and cross-section views included.
Plant rooms and balconies carry their own loads; stair and atrium voids carry none. The cells re-route, in 2D and 3D.
Multi-page drawings import as levels with per-page calibration; walls and columns are suggested from the drawing's own geometry, and you approve each one.
Preliminary pad and strip sizes from your bearing pressure, plus concrete, formwork and reinforcement allowances — every assumption stated.
Pin a design, keep editing, and read the live deltas — foundation totals, governing supports, quantities.
Click any number to expand the exact calculation that produced it — combinations named, reductions shown.
PDF, Excel and CSV with cross-sections, markups, zones and pinned reactions — submittal-ready, metric or imperial.
Each opens in the studio as a project of your own, saving itself as you work. Every reaction is computed the moment it loads.
The canonical tributary-area example: four corner columns under a square slab.
A regular column grid with interior, edge and corner columns to compare.
Loads accumulating down two levels to the foundation reactions.
A roof panel with roof-load handling, ready for a snow comparison.
A bearing wall and columns sharing one floor — line and point supports together.
Select a support to inspect its tributary area, load components and reaction — and trace exactly where it goes next.
Representative interface · figures are illustrative
Drag a support and watch tributary areas redraw in real time. It turns an abstract statics concept into something you can feel.
Run an early load takedown in the time it takes to open a spreadsheet — and produce something you'd actually put in front of a client.
One Excel file: the three-storey residential sample run through our real exporter — every level's takedown, foundation ΣV — plus the checklist we run before trusting any takedown. No drip campaign, just the file.