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.
