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the same csiamerica.com/sales page that publishes SAP2000/ETABS perpetual pricing also lists CSiBridge tiers from Plus $13,391 to Advanced with Rating $29,756 (plus annual maintenance), so the pricing-wall objection no longer applies, though CSI does not officially support third-party OAPI tools.","civil-infrastructure":"Bridge-centric civil software with real parametric span modeling, staged construction analysis, and AASHTO code checks -- far more specialized than Civil 3D or OpenRoads, but directly relevant when the infrastructure scope is bridge design and rating."},"redFlags":[],"primarySubCategory":"structural","subCategories":["structural","civil-infrastructure"],"sectors":["civil"],"firmSizeFit":["small-team","growing"],"agentAccess":{"mcp":false,"cli":false,"api":"CSI OAPI (VBA, VB.NET, C#, C++, Python, MATLAB) -- shared with SAP2000/ETABS/SAFE","authModel":"unknown","scripting":"CSI OAPI scripting (Python/C#/VBA)","webhooks":false,"agentDocs":["https://www.csiamerica.com/developer","https://wiki.csiamerica.com/display/kb/OAPI"]},"integrations":[{"name":"SAP2000"},{"name":"ETABS"},{"name":"SAFE"},{"name":"Revit (CSI x Revit link)"}],"fileFormats":[{"format":"BRG","direction":"unknown","support":"unknown"},{"format":"IFC","direction":"unknown","support":"unknown"},{"format":"E2K","direction":"unknown","support":"unknown"}],"scores":{"c1":4,"c2":3,"c3":2,"c4":4,"c5":4},"pricing":{"model":"perpetual license + annual maintenance, same public rate-card page as SAP2000/ETABS","freeTier":false,"freeViewer":"unknown","trial":"unknown","entryUsd":13391},"evidenceUrls":{"apiDocs":"https://www.csiamerica.com/developer","pricing":"https://www.csiamerica.com/sales"},"platforms":["desktop"],"lifecycle":"active","lastVerified":"2026-07-07","category":"engineer"},{"id":"pgsuper","name":"PGSuper / BridgeLink (WSDOT)","url":"https://www.wsdot.wa.gov/eesc/bridge/software/","description":"Free, open-source bridge design, analysis, and load-rating software suite developed and maintained by the Washington State Department of Transportation (WSDOT) -- PGSuper for precast-prestressed concrete girder design (AASHTO LRFD), PGSplice for spliced post-tensioned girders, XBRate for reinforced concrete bent-cap load rating, plus BRIDG Concrete/Steel and BEToolbox utilities, bundled in the BridgeLink suite; used by state DOTs and bridge engineering consultants across the United States.","verdict":"solid","composite":3.4,"verdicts":{"structural":"Solid -- a genuinely free, open-source, actively maintained bridge design and load-rating suite from WSDOT (current v9.0.2, June 2026 release) with AASHTO LRFD support and a programmable Washington Bridge Foundation Library (WBFL) SDK in C++; the only cost is learning the DOT-grade workflow, and there is no cloud API/CLI (RF2), but for a free tool with no vendor lock-in this is the best value proposition in bridge structural software.","civil-infrastructure":"The best free bridge-design option on the civil side -- strong for AASHTO girder workflows and load rating, but too narrow to replace general corridor or site-design software."},"redFlags":[],"primarySubCategory":"structural","subCategories":["structural","civil-infrastructure"],"sectors":["civil"],"firmSizeFit":["solo","small-team","growing"],"agentAccess":{"mcp":false,"cli":false,"api":"Washington Bridge Foundation Libraries (WBFL) -- C++ programmable software component SDK for bridge engineering; 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only generic Autodesk Platform Services (APS) suite and a legacy 2014-era InfraWorks 360 REST API (no longer actively documented)","authModel":"unknown","scripting":"none (file-based interop only: IMX, LandXML export/import)","webhooks":"unknown","agentDocs":[]},"integrations":[{"name":"Civil 3D"},{"name":"Revit"},{"name":"ArcGIS (Esri)"},{"name":"Navisworks"}],"fileFormats":[{"format":"IMX","direction":"unknown","support":"unknown"},{"format":"LandXML","direction":"unknown","support":"unknown"},{"format":"Shapefile","direction":"unknown","support":"unknown"},{"format":"IFC","direction":"unknown","support":"unknown"},{"format":"CityGML","direction":"unknown","support":"unknown"},{"format":"DWG","direction":"unknown","support":"unknown"}],"scores":{"c1":3,"c2":2,"c3":3,"c4":4,"c5":4},"pricing":{"model":"subscription","freeTier":false,"freeViewer":"unknown","trial":true,"entryUsd":2090},"evidenceUrls":{"pricing":"https://novedge.com/products/buy-infraworks-subscription"},"platforms":["desktop"],"lifecycle":"active","lastVerified":"2026-07-07","category":"design"},{"id":"autocad-map-3d","name":"AutoCAD Map 3D","url":"https://www.autodesk.com/products/autocad/included-toolsets/autocad-map-3d","description":"AutoCAD-based GIS integration toolset for civil and infrastructure design, enabling import of geospatial data (shapefile, KML, GML, CityGML, PostGIS/SQL Server), coordinate transformation, and integration with ESRI ArcGIS for mapping and analysis.","verdict":"solid","composite":3,"verdicts":{"civil-infrastructure":"Strong for civil/GIS workflows already in AutoCAD -- AutoCAD Map 3D integrates geospatial data sources (ESRI, PostGIS, Shapefile, KML, GML) and coordinate transformation directly into 2D/3D design, bridging the gap between GIS analysis and CAD production for civil engineers; the learning curve and subscription-only bundling (no standalone purchase) limit the addressable market to firms with existing AutoCAD infrastructure."},"redFlags":["RF1"],"primarySubCategory":"civil-infrastructure","subCategories":["civil-infrastructure"],"sectors":["civil","agnostic"],"firmSizeFit":["small-team","growing"],"agentAccess":{"mcp":false,"cli":false,"api":"FDO (Feature Data Objects), AutoLISP, ObjectARX (.NET/C++), Geospatial Platform API (.NET), APS REST API","authModel":"n/a (subscription desktop)","scripting":"AutoLISP, .NET, C++","webhooks":false,"agentDocs":["https://help.autodesk.com/view/MAP/2026/ENU/","https://aps.autodesk.com/developer/overview/autocad-map-3d-api"]},"integrations":[{"name":"AutoCAD"},{"name":"ESRI ArcGIS"},{"name":"Civil 3D"},{"name":"PostGIS"},{"name":"SQL Server"}],"fileFormats":[{"format":"DWG","direction":"both","support":"full"},{"format":"Shapefile","direction":"import","support":"full"},{"format":"KML","direction":"both","support":"full"},{"format":"GML","direction":"import","support":"full"},{"format":"CityGML","direction":"import","support":"full"}],"scores":{"c1":2,"c2":3,"c3":2,"c4":4,"c5":4},"pricing":{"model":"subscription","freeTier":false,"freeViewer":false,"trial":"unknown"},"evidenceUrls":{"pricing":"https://www.autodesk.com/products/autocad/buy","apiDocs":"https://aps.autodesk.com/developer/overview/autocad-map-3d-api","formats":"https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/ImportingExporting-supported-vector-formats-s.html"},"platforms":["desktop"],"lifecycle":"active","lastVerified":"2026-07-18","category":"design"},{"id":"faarfield","name":"FAARFIELD (FAA)","url":"https://www.faa.gov/airports/engineering/design_software/","description":"Standard airport pavement thickness design software developed and distributed free by the U.S. Federal Aviation Administration (FAA) -- implements the FAA AC 150/5320-6G pavement design methodology using layered elastic analysis and the ACR/PCR pavement-strength reporting method; the mandatory tool for any U.S. airport pavement engineer working on FAA-funded airport projects, with companion backcalculation (BAKFAA) and runway-exit-design (REDIM) software.","verdict":"solid","composite":3,"verdicts":{"civil-infrastructure":"Solid -- the FAA-mandated, free standard for airport pavement design with layered elastic analysis and ACR/PCR strength reporting; zero cost, zero lock-in, and accompanied by free companion tools (BAKFAA for backcalculation, REDIM for runway exit design), but it is a desktop-only tool with no API/CLI (RF2) and the airport-specific scope limits use to pavement engineers on FAA-funded projects."},"redFlags":["RF2"],"primarySubCategory":"civil-infrastructure","subCategories":["civil-infrastructure"],"sectors":["civil"],"firmSizeFit":["solo","small-team","growing"],"agentAccess":{"mcp":false,"cli":false,"api":"none","authModel":"n/a (free, no license)","scripting":"none","webhooks":false,"agentDocs":[]},"integrations":[],"fileFormats":[{"format":"XML","direction":"both","support":"unknown"}],"scores":{"c1":5,"c2":1,"c3":3,"c4":5,"c5":1},"pricing":{"model":"free","freeTier":true,"freeViewer":true,"trial":true},"evidenceUrls":{"pricing":"https://www.faa.gov/airports/engineering/design_software/"},"platforms":["windows"],"lifecycle":"active","lastVerified":"2026-07-18","category":"design"},{"id":"trimble-business-center","name":"Trimble Business Center","url":"https://geospatial.trimble.com/en/products/software/trimble-business-center","description":"Survey CAD software for processing field data from GNSS, total stations, laser scanners, drones, and mobile mapping into high-quality deliverables, with specialized modules for mining, monitoring, tunneling, bridge, and GIS workflows.","verdict":"solid","composite":3,"verdicts":{"civil-infrastructure":"Solid -- Trimble Business Center is essential for survey teams managing point clouds (LAS/E57) and multi-source geodetic workflows. Strong ArcGIS and Autodesk interoperability. Learning curve is steep but worthwhile for civil specialists. Subscription model, active 2026 releases, and two-factor auth (2026+) show ongoing investment. 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