European steel, mitred properly.
IPE, HEA, HEB, UPE, angles and hollow sections from the catalogue — with joints cut to follow the profile, not sliced flat.
A catalogue, not a box
IPE, HEA, HEB, UPE, L, RHS, SHS and CHS with their real dimensions. Hollow sections are built as a genuine ring, so the cross-sectional area behind the quantities is the actual one rather than an outline.
The profile name travels into IFC, so HEB 240 arrives at the structural engineer as HEB 240.
Mitres on profiles, without booleans
Each point of the section is interpolated between the corners of the cut face, so an I-section meeting another at an angle is cut through the flanges and web the way it would be fabricated. No solid operations, which means no failures on the awkward cases.
Grids that place the columns
Type the spacings — 6000;2x4500 — and get dashed axes with bubbles at both ends that SketchUp inference snaps to, with columns on every intersection if you want them. The whole grid is one object, editable and explodable.
Foundations from the walls above
Click the walls, press Enter, and a strip footing appears under each one, its faces derived from the wall faces plus a toe and a heel — correct whatever the wall was justified to. Corners mitre themselves; no closed loop required.
Trim and extend on a footing aim at the face of the target rather than its axis, because that is the semantics masonry needs.
The rest of it.
Walls & openings
Draw a chain, and the corners mitre themselves and stay mitred. Windows and doors live in the wall as parameters, so nothing breaks when the wall moves.
Roofs
Not just rectangles. An L, a U, a plan with a wing — the hips, valleys and ridges are computed from the outline, so complicated roofs stop being a modelling exercise.
Floors & stairs
The parts of a building that are tedious to model and easy to get subtly wrong. Draw the walking line and the treads, landings, soffit and the opening in the slab above follow.
Services
Ten systems, product catalogues, bends and tees that appear where they belong, and connection ports that snap to the fixtures.
Documentation
Plans per storey, named sections, hatching by material at your drawing scale, schedules, and a LayOut file at the end of it. This is where the SketchUp ecosystem stops.
IFC
Material layers, openings linked to their fills, quantities computed from the geometry — and a check that stops two elements collapsing into one in the viewer.