Exchange Information Requirements (EIR / CSI)
A set of BIM documents produced by BIMTECH – buildingSMART Romania together with CNIR for the Bucharest – Giurgiu motorway / expressway feasibility study. Preliminary version, for public consultation, fully aligned with the ISO 19650 series of standards.
Exchange Information Requirements for an infrastructure project
This set of documents was produced by the BIMTECH – buildingSMART Romania team together with the National Road Investment Company (CNIR) for the feasibility study of the Bucharest – Giurgiu motorway / expressway. The documents define the minimum BIM delivery requirements in a public tender and serve as a template for digitalising public infrastructure procurement in Romania. This is a preliminary version, published for public consultation, and fully aligned with the SR EN ISO 19650 series of standards.
What are Exchange Information Requirements (EIR / CSI)? EIR — Exchange / Employer Information Requirements — is the document through which the employing party (the client) defines the minimum requirements for delivering a project's BIM information: which models, at what level of detail, in what formats and following which organisation rules they must be delivered.
The EIR is the basis of a three-step flow: EIR (the client's requirements) → Pre-BEP (the preliminary plan submitted by bidders to demonstrate BIM capability) → BEP (the detailed BIM execution plan, produced by the winning party after award).
The complete document set
Four complementary documents, available as PDF. You can use them as a starting point for your own BIM requirements or execution plans.
EIR — Exchange Information Requirements
The main document (21 pages): scope, standards, terminology, objectives, BIM uses, geometric and information requirements, naming convention, CDE, quality.
Download PDF →BIM model component elements
The detailed list of the 3D elements to be modelled, by discipline (roads, bridges, hydrotechnical, geotechnical…), with the file formats and minimum attributes required.
Download PDF →CNIR BIM requirements per the Terms of Reference
Correlates the terms-of-reference requirements with the BIM uses / use cases, indicating which elements are recommended for modelling in the feasibility-study phase.
Download PDF →Indicative Pre-BEP table of contents
The indicative structure of a Preliminary BIM Execution Plan, which bidders can use as a template for their own document submitted in the tender phase.
Download PDF →The model use cases
The BIM uses were selected starting from the terms-of-reference requirements, for the feasibility-study phase.
Model development
Creating the building information models, connecting the 3D geometry with a database of properties, quantities and costs.
2D drawing generation
Producing drawings directly from the 3D model, used in both the design and the construction phases.
Modelling existing conditions
A 3D model of the site based on advanced surveys — point clouds, orthophoto maps, laser scanning.
Site analysis
BIM and GIS tools for assessing the site and optimally positioning the construction.
Communication and marketing
Visualisations, high-quality images and interactive 3D animations to present the project to stakeholders.
Geometry, information and formats
📐 Geometric requirements
- LoG 200 (BIMForum 2023) — generic systems with approximate quantities, dimensions, shape and location
- Georeferencing in the STEREO70 system
- Splitting the 3D models by discipline per the elements annex
ℹ️ Information requirements
- LoI — attributes organised into property sets on each object
- Classification codes, locations, relationships and data for the BIM uses
- Gradual collection, according to the life-cycle stages
💾 File formats
- The open IFC4 ADD2 TC1 format (buildingSMART) is mandatory
- Editable native format (.rvt, .dwg, .imx, .3dm, .pln…)
- Additional exchange via .dxf, .xml, .las/.laz as applicable
The naming convention
Per SR EN ISO 19650-2 (§5.1.7), each information container has a unique identifier made up of fields delimited by the "-" character.
🗄️ Common Data Environment (CDE)
- A single source of information for the whole project
- Permission control, versioning and approval workflows
- IFC / XML viewing, advanced search, data extraction
- Security accredited to ISO 27001 and ISO 19650-5
✅ Quality control
- Self-checking and visual checking — continuous
- Checking against technical standards — weekly
- Model integrity checking — monthly
- Clash detection — spatial coordination before execution
📚 Reference standards
- SR EN ISO 19650, parts 1–5
- SR ISO 21500:2021 — project management
- IFC — ISO 16739-1:2024
- RTC 8 — BIM information management guide
A template for digital public procurement
These documents are made available for free by buildingSMART Romania to support the adoption of openBIM and the ISO 19650 standards in infrastructure projects. You can reuse and adapt them for your own projects.