midas Civil NX Plug-ins Get them
Get them from the Marketplace

Bridge assessment & design · 11 plug-ins

The lane set-out, the combinations and the reporting, off your desk.

Eleven plug-ins for midas Civil NX that build notional lanes, assessment and design combinations, moving load cases, grillage geometry and result reports — against the model you already have open.

Get them from the Marketplace See all eleven

CS 454 · EN 1990 · EN 1991-2  —  versions current 1 September 2026

The Skew Grillage Geometry Generator running in Civil NX: geometry inputs on the left — span, deck width, girder count, transverse spacing and a 20 degree skew angle — and a live 3D preview of the resulting skewed grillage on the right.
Skew Grillage Geometry Generator · live preview SKEW 20° · 44 NODES
On the Marketplace
11

Installed from inside Civil NX. No separate download.

Code families covered
CS 454 + Eurocodes

Assessment lanes and combinations; EN 1990 and EN 1991-2.

Support articles
One each

Every plug-in below links its own article on MIDAS Support.

The suite

Four groups, eleven plug-ins.

Six deal with lane set-out, load combinations and moving load cases to CS 454 and the Eurocodes. The rest cover deck geometry, load conversion, model reporting and results export.

CS 454 assessment

3 plug-ins
The CS 454 Auto Lane Generator, Lanes tab: tick boxes for each ALL model loading case, with a Create 9 lanes button.

CS 454 Auto Lane Generator

v1.0.4

Sets out the notional lanes across the deck for a CS 454 assessment. It handles skew and curvature, and it will take its reference line from a structure group of nodes rather than a straight chord.

Support article →

The CS 454 Load Assessment Combinations plug-in mapping each CS454 load case to a load model and a CS 454 action.

CS 454 Load Assessment Combinations

v1.0.2

Generates the assessment combinations from the load cases already in the model. Names and descriptions stay readable once they reach the results tree.

Support article →

The CS 454 Moving Load Generator, Loading tab: normal or abnormal traffic, assessment live loading models and load levels.

CS 454 Moving Load Generator

v1.0.3

Moving load cases for a CS 454 assessment, including user-defined permit vehicles and footway-only loading.

Support article →

Eurocode loading

3 plug-ins
The Eurocode Auto Lane Generator showing a deck cross-section with two 3 m notional lanes and a 1.3 m remaining area set out.

Eurocode Auto Lane Generator

v1.0.2

Divides the carriageway into notional lanes to EN 1991-2 and sets them out on the model, remaining area included.

Support article →

Eurocode Load Combinations

v2.0.1

EN 1990 combinations: ULS and SLS, characteristic, frequent and quasi-permanent, built from your load cases. Now on its second major version.

Support article →

The Eurocode Moving Load Generator, Load models tab: EN 1991-2 traffic load groups gr1a to gr5 with explanatory notes.

Eurocode Moving Load Case Generator

v1.0.1

Builds the moving load cases for the Eurocode load models against lanes you have already set out.

Support article →

Geometry and load set-up

2 plug-ins
The Skew Grillage Geometry Generator: grillage inputs beside a live 3D view of the skewed deck grillage.

Skew Grillage Geometry

v1.0.4

Generates the grillage geometry for a skewed deck, longitudinal girders and transverse members together. This version adds a radius of curvature, so curved decks are covered as well.

Support article →

The Point to Patch Convertor showing the load dispersal diagram through surfacing and slab, with the resulting patch dimensions.

Point to Patch Convertor

v1.0.1

Converts point loads into the equivalent patch loads, so wheel and axle loads spread over the deck instead of arriving as a spike at one node.

Support article →

Results and reporting

3 plug-ins

Model Report Builder

v1.0.1

Reads the open model and compiles a report of what is in it, which is useful for a QC pass or a handover. It only reads. Nothing in the model is changed.

Support article →

The Load Combination Contribution Analyzer, Results tab: each load case's factor, raw value and contribution to the combination.

Load Combination Contribution Analyzer

v1.0.1

Breaks a combination result back down into what each constituent load case contributed. The quickest way to find out why a combination is governing.

Support article →

Bulk Tabular Result Exporter

v1.0.1

Exports a run of result tables in one pass instead of taking them out one at a time.

Support article →

How they work

They run against the model in front of you.

Written to the codes you assess to

CS 454 lanes, assessment combinations and moving load cases; EN 1990 combinations and EN 1991-2 lane set-out — including user-defined permit vehicles.

They read what is already there

Combinations are built from the load cases in the model; lanes can be set out from a structure group of nodes. You are not re-entering the deck a second time.

Reporting that does not touch the model

The Model Report Builder only reads. It compiles what is in the model for a QC pass or a handover and changes nothing.

Installing

Three steps, inside Civil NX.

  1. 01Open Apps → API → Plug-in from the Civil NX ribbon.
  2. 02Go to Marketplace and search for the plug-in by name — the names above are the names to search for.

Version numbers on this page are the Marketplace versions current at 1 September 2026, not build numbers.

Questions

Before you install.

How do I install one of these?
In Civil NX, open Apps → API → Plug-in, go to Marketplace and search for the plug-in by name. There is nothing to download separately.
Do the plug-ins change my model?
Most of them write into it — that is the point: lanes, load combinations, moving load cases and grillage geometry are created for you. The Model Report Builder is the exception: it only reads, and changes nothing.
Do the lane generators handle skew and curvature?
The CS 454 Auto Lane Generator does. It handles skew and curvature, and it will take its reference line from a structure group of nodes rather than a straight chord — useful on a curved or irregular deck.
What do the version numbers mean?
They are the Marketplace versions current at 1 September 2026, not internal build numbers. The Marketplace listing is the authority on what is current today.
Where do I get help with a particular plug-in?
Every plug-in above links to its own article on MIDAS Support, which covers what it does and how to drive it.