TheBridgeEng - Bridge Engineering

We don't just design and build bridges. We connect you and me — and turn ‘you and I’ into ‘we.’

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Toolbox

A growing toolbox for bridge engineers

Every tool on this page runs in your browser — no login, no install, nothing to download. Tap a tile to jump straight to it. New tools are added as they are built and verified.

Steel · sectionsConcrete · substructurePSC · cableLoads · analysisPlanning
Section PropsA · I · S · rarea, inertia, moduli — incl. girdersOpen →Beam AnalyzerSFD · BMDmulti-span shear, moment, deflectionOpen →Frame & Trussportal · trussportals and trusses, live diagramsOpen →Spread Footingbearing · shearbearing, shear, punching, steelOpen →Anchor BoltACI Ch.17ACI 318 Ch.17 single anchorsOpen →Budget Estimatorcost modelearly cost bracket by bridge typeOpen →FCM Sizebalanced cant.balanced-cantilever box sizingOpen →Girder DepthL/d bandsAASHTO depth bands by spanOpen →Span Recommendertype vs spanwhich bridge type fits the spanOpen →Expansion Jointmovementthermal + creep & shrinkage demandOpen →Bearing Padelastomericelastomeric pad area & thicknessOpen →PT Elongationfriction lossfriction loss and field elongationOpen →Method SelectorerectionMSS, FCM, ILM, precast comparedOpen →Abutment SizerproportionsRankine stability + steel estimateOpen →Stay Cablecatenaryexact stay geometry, as-built checkedOpen →Distribution FactorAASHTO 4.6.2.2LLDF: interior, exterior, lever rule, skewOpen →HL-93 EnvelopeM & Vtruck + tandem + lane, 1–3 spansOpen →Load RatingLRFR RFinventory & operating rating factorsOpen →Pile CapacityAXIAL φRNskin friction + end bearing by layerOpen →Development LengthAASHTO 5.10.8tension, hooks & laps with factorsOpen →Pier ColumnP-M + KL/Rslenderness + interaction quick checkOpen →Prestress Losses5.9.3.3 APPROXES + long-term lump sum → fpeOpen →Wind LoadAASHTO 3.8PZ on super & substructureOpen →Scour DepthHEC-18 CSUpier local scour estimateOpen →RC Beam Design5.6.3 φMN·φVNflexure + shear check, required AsOpen →
Methods

How bridges are built

Six erection methods, animated. Watch a superstructure go up from pier table to pavement, scrub the timeline step by step, and read where each method wins — spans, strengths, and the cases it was made for.

All methods
FE Practice

FE Civil, practiced properly

A verified question bank across all fourteen knowledge areas — every numeric answer computed and cross-checked in Python before publishing. Pick a mode; the exam room is one click away.

Open FE Practice
Bridges

Bridges worth looking at

10,000+ bridges on one map — tap a pin to open the photograph and the structural data behind it: span, system, engineer, and a note on why the form works. Filter by region or structural family, or search by name.

Full gallery
Open full-screen map → Browse as grid → World span rankings →
Failures

Learning from failure

A growing forensic library of bridge failures, 1807 to today — the mechanism, the cause chain, and what the design codes changed. Because every clause in today's codes was paid for.

All cases
Reference Library

The codes behind the calculators

A curated shelf of the standards and guides a practicing bridge engineer actually opens — AASHTO, FHWA, Eurocodes, Sétra/Cerema, fib, PTI, Korean KDS 24 and Japanese JRA/JSCE. Free public-domain documents are linked in full; commercial codes link to their official homes only.

20+ curated entries · free/link-only clearly badged · links verified 2026-08 · open the full library →
Daily Brief

One bridge story a day

The latest briefs - collapse & safety, new projects, and new technology - synthesized from the sources, never copied. Tap a card for the full archive.

All briefs
Insight

Insight from practice

Notes on bridge engineering, design thinking, and the view from the field - posted here in parallel with LinkedIn. Tap a card to read more.

All insights