QuickerBridge

Preliminary analysis of continuous bridge girders, in your browser. Moving-load envelopes, influence lines, vibration modes and the CSA S6-25 truck load fraction FT for girders of up to 7 spans — powered by PyCBA running locally through WebAssembly. No installation, no server, no data leaves your computer.

▶ Open the app: https://acheruel.github.io/QuickerBridge/

Version 1.01 · 2026-10-17 · Anthony Chéruel · Version history

What it does

• Live loads: CL-625, CL-750-QC (MTQ), AASHTO HL-93, Cooper E, maintenance or custom vehicles, S6 dynamic allowance, lane loads, pedestrian load; the governing arrangement of any extreme on a click.
• Structure: pinned, roller, integral (fixed) or spring supports, simple spans, split piers, deck cut; steel plate girders, NEBT precast girders or direct EI, composite inertia, non-prismatic haunches.
• Outputs: V, M, deflection, reactions and EI diagrams, influence lines, vibration modes, imposed deformations, staged stresses, steel resistance, S6-25 FT (slab on girders, slabs, steel grid, aluminum and wood decks), Excel workbook (FR/EN), .quickerbridge.json projects and side-by-side comparison.

Use it

• Web: open the link above in a recent Chrome, Edge or Firefox.
• Offline: download QuickerBridge-v<version>-<date>.html from the repository root or the releases and double-click it (Internet is needed once for the Python runtime).

Indicative preliminary values only — not a substitute for detailed design. Linear-elastic 1D beam, one traffic lane, longitudinal effects only. The author cannot be held liable for the results.

Validation: VALIDATION.md · NONPRISMATIC.md · Development: README_DEVELOPER.md

Credits and licence

Built on PyCBA by Colin Caprani (AGPL-3.0-or-later), vendored with local additions; runs on Pyodide. See THIRD_PARTY_NOTICES.md.