Structural drawings in,cut lists out.

Choosing which stock bars to cut for thousands of required lengths is a classic hard optimisation problem — and engineers export reports while others are working.

An adaptive selector scores each bar diameter's demand and picks a solver — greedy, local search, dynamic programming or branch-and-bound — each with time budgets. They run on a shared worker pool so heavy exports never block the app.

Long bars must be spliced, and leftover pieces are real steel worth reusing.

Long bars are split by effective coverage to count splices and lap length, couplers apply only where the bar size allows, and usable offcuts return to inventory with their lineage for the next run.

Every bar shape has its own bends and deductions, and codes vary by grade and project.

Shapes carry their own bend and deduction expressions, evaluated per end, with development length from grade tables or an editable lap coefficient — so new shapes need data, not a deploy.

Slab bars must fill irregular boundaries at an exact spacing.

Pure planar geometry — point-in-polygon, area and a sweep with bisection — lays parallel bars inside any outline, ported from a desktop CAD prototype and matching it exactly.