BIM Level 2 is distinguished by collaborative working, all parties use their own 3D models, but not necessarily working on a single, shared model. The collaboration comes in the form of how the information is exchanged between different parties - this is the crucial aspect of BIM Level 2.
Design information is shared through a common file format, which enables any organisation to be able to combine others data with their own in order to make a federated model.
It is therefore crucial that software used by each party must be capable of exporting to one of the common file formats such as IFC (Industry Foundation Class) or COBie (Construction Operations Building Information Exchange).
This is the method of working that has been set as a minimum target by the UK government for all work on public sector projects, by 2016.
The Spirit of BIM Level 2
- Employer’s Information Requirement
- Collaborative working
- Individually authored models
- Common classification of data
- Agreed methods of exchanging information
- Creation of a federated information model
BIM Level 2 Standards
- BS 1192: 2007
- PAS 1192-2: 2013
- PAS 1192-3: 2014
- BS 1192-4: 2014
- PAS 1192-5: 2015
- BS 8536-1: 2015
- CIC BIM Protocol
- NBS BIM Toolkit
- Classification System
The BIM Level 2 standards are free to download thanks to UK government, BSI, CIC and NBS.
BS 1192: 2007: Collaborative production of architectural, engineering and construction information. Code of practice.
If you are going to do anything, do this. BS 1192 is the proud grandparent of Level 2. It sets out methods, best practice and naming conventions for the collaborative production of information and the successful exchange of information. It can, and should be, adopted by all members of a project team throughout the lifecycle and the supply chain.
If you start with BS 1192 much of what follows will fall neatly into place.
PAS 1192-2: 2013 : Specification for information management for the capital/delivery phase of construction projects using building information modelling
‘The PAS’ builds on BS1192, but focuses on the project delivery, building the building. For most architects this is the next document to get to grips with. It introduces new concepts such as the employer’s information requirements (EIR’s) the BIM execution plan (BEP) and project information model (PIM).
- EIR’s - What information does the client need and what format do they want it in.
- BEP – The project team’s response to the EIR, how they are going to deliver the client’s requirements.
- PIM – The information model created during the project delivery phase.
The PAS also introduces a new member of the team, the ‘Information Manager’. This is an important new role and is mandated on a BIM Level 2 project.
The Information Manager is responsible for setting up and managing the Common Data Environment (CDE), which is the critical tool for effective collaboration and quality control. The CDE will be used to exchange all project information, not just BIMs, so whilst the Information Manager can be appointed from any part of the team there are synergies with the lead co-ordinator role.
It would be a shame for architects not to see this as a natural extension of their coordination duties.
PAS 1192-3: 2014 :Specification for information management for the operational phase of assets using BIM
PAS 1192-3, just like PAS 1192-2, builds on the principles of collaborative production of information as defined in BS 1192: 2007, however this time the focus is on the operational phase of the building.
PAS 1192-3 has been developed in recognition of the fact that the cost of operating and maintaining buildings can represent up to 85% of the whole-life cost, therefore saving in the operation phase can pay back any upfront premium in construction expenses in a few years.
The PAS includes guidance on the creation of an asset information model (AIM) in order to ensure that information created during the project delivery phase is appropriate for the operation of the building throughout its life cycle.
AIM – The information model created for the efficient operation of the building.
BS 1192-4: 2014 : Collaborative production of information. Fulfilling employer’s information exchange requirements using COBie. Code of practice
This BS defines the use of COBie (Construction Operations Building information exchange), which is an agreed format for the exchange of information between different stakeholders. The common structure ensures that exchanges of information can be reviewed and validated for compliance and completeness. In addition as a ‘common language’ viewable on almost every PC it removes the need to understand or have access to the ‘sending’ or ‘receiving’ applications or databases.
PAS 1192-5: 2015 : Specification for security-minded building information modelling, digital built environments and smart asset management
Even on fairly mundane projects our building information models have the potential to include sensitive or valuable information. With that in mind PAS 1192-5 sets out the requirements for the security minded management of the information model. There is a security triage process set out in the PAS to help determine the level security required for the project. This extends to any situation where digital asset information is created, stored, processed and viewed. PAS 1192-5 is therefore potentially relevant to any organisation working with BIM.
BS 8536-1: 2015 : Briefing for design and construction. Code of practice for facilities management
This BS captures the opportunity for intelligent briefing by bringing soft landings and post occupancy evaluation into the building information modelling process. BS 8536-1 includes recommendations for briefing that involve the operations team from inception and incorporates the principles of government soft landings (GSL). The standard will apply to all new buildings and major refurbishment projects that are required to achieve BIM level 2.
CIC BIM Protocol
The Protocol has been drafted for use on all common construction contracts and supports BIM working at Level 2. The Protocol identifies the Building Information Models that are required to be produced by members of the Project Team and defines the specific obligations, liabilities and importantly the limitations on the use of the models.
NBS BIM Toolkit
‘Who, what and when.’ The NBS BIM Toolkit, or Digital Plan of Work enables the employer to define the deliverables required at each stage of the project, who is responsible for creating them and to what level of definition. The level of definition is tuneable both in terms of 3D geometry and the level of information. The output of the digital plan of work is a Master Information Delivery Plan (MIDIP). The MIDIP has the potential to become the key design management tool during the development of a project.
The content from the NBS BIM Toolkit develops over time as more information is known about the project. It should be made available to all participants on the project so that they know who must deliver what information and when.
For us to achieve the goal of structured information we need to use a consistent classification system for all elements of a construction. The system needs to contain codes for all the components that could be used within a project from the largest infrastructure project to the smallest intervention. There are a number of classification systems available, but for BIM Level 2 Uniclass 2015 has been restructured and redeveloped to provide a comprehensive system suitable for use by the entire industry, including the infrastructure, landscape, engineering services as well as the building sector, and for all stages in a project life cycle.
- Uniclass 2015 - A unified classification system for the UK industry construction industry.
Government Construction Strategy 2016-2020
Under the Government Construction Strategy 2011-15 the government set out its requirement for fully collaborative 3D BIM on centrally procured government construction projects by 2016. BIM Level 2 was developed with government support to meet this mandate that officially came in to effect in April 2016. Ahead of this date the government published Government Construction Strategy 2016-20, which stated that the majority of departments have already met the requirements for BIM Level 2 and the remaining departments are on target to meet the 2016 mandate.
BSI BIM Level 2 Website
The British Standards Institute have developed a resource for designers, clients, contractors, trade suppliers, manufacturers, maintainers, operators and users to understand how to use Building Information Modelling and data to improve productivity and reduce waste. It collects all the BSI BIM standards listed above and further guidance.
NBS BIM Knowledge Hub
The revolutionary force of Building Information Modelling continues to reverberate around the construction industry. Tap into specialist insight and analysis on BIM from NBS.
NBS National BIM Report 2016
The NBS National BIM Report is the most comprehensive analysis of the state of BIM within the UK construction sector.
NBS Services and Tools for BIM
RIBA Publishing BIM Books
- BIM Demystified (2nd edition)
- BIM Management Handbook
- BIM in Small Practices: Illustrated Case Studies
- BIM for Construction Clients
- BIM for Construction Health and Safety
- Information Exchanges: RIBA Plan of Work 2013 Guide
Further BIM Information, Blogs and Discussion Forums
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