INTERIM ADVICE NOTE 184/14 Standard …

1 INTERIM ADVICE Note 184/14 . Highways Agency Data & CAD Standard INTERIM ADVICE NOTE 184/14 . Highways Agency Data & CAD. Standard Instructions on naming conventions, file types and data structures for the delivery and transfer of CAD / BIM files to the Highways Agency and its supply chain. Summary The Government Construction Strategy requires fully collaborative 3D BIM by 2016. This IAN puts in place some key enabling measures to facilitate this on Highways Agency projects. It implements the methodology of BS1192:2007 to give a consistent approach to file naming across the whole supply chain. It specifies acceptable file formats and gives rules for their use.

2 Instructions for Use This guidance is to be adopted for all new projects. INTERIM ADVICE Note 184/14 . Highways Agency Data & CAD Standard Amendments 08/2014 First edition IAN 184/14 Page 2 of 41 Sept 14. INTERIM ADVICE Note 184/14 . Highways Agency Data & CAD Standard Table of Contents 1. General requirements for data files Units Coordinates File types 2. File names Project Originator Volume Location Type Role Number Suitability and Revision 3. CAD model and drawing files Content File formats CAD Layer names CAD composition and presentation 4. Survey data Topographic survey Geotechnical survey LIDAR point cloud Orthorectified aerial survey Underground asset survey Overhead power cable survey 5.

3 Geometric modelling data Alignment Terrain 6. Asset coding 7. Feedback and Enquiries 8. Normative References Appendix A Ordnance Survey Data Supply Models Appendix B Project Information Search Table Appendix C Example CAD Layer Names Appendix D Explanatory Notes IAN 184/14 Page 3 of 41 Sept 14. INTERIM ADVICE Note 184/14 . Highways Agency Data & CAD Standard Executive Summary The Highways Agency, as executive body to the Department for Transport, has adopted the UK Government Construction Strategy which requires fully collaborative 3D Building Information Modelling (with all project and asset information, documentation and data being electronic) as a minimum by 2016.

4 The Agency shares the vision that significant improvement in cost, value and carbon performance can be achieved through the use of open sharable asset information. BIM will facilitate the delivery of consistently high quality asset data for use in operational, financial and engineering decision making and planning processes across the Agency. The HA will: move from a control focus to a decision based delivery model integrate teams to accelerate delivery and reduce waste drive improvement, innovation and deliver value The HA acknowledges the challenges that it and the supply chain will face in the adoption of BIM and as such is clear that HA will need to adopt a pragmatic but progressive approach to the adoption of BIM.

5 This IAN has been produced as a first step to define the governance needed for the implementation of BS1192:2007 and PAS1192-2. It will enable the supply chain to configure their systems and Common Data Environments to produce and receive information in a consistent manner on behalf of the HA. The requirements of PAS1192-3 (for the operational phase) and BS1192-4 (UK Implementation of COBie) will be addressed at a later stage. As the Agency undertakes improvements to its Asset Management systems, and as technology and process for the design and construction of infrastructure improve, this IAN. will be updated accordingly.

6 IAN 184/14 Page 4 of 41 Sept 14. INTERIM ADVICE Note 184/14 . Highways Agency Data & CAD Standard 1. General Requirements for data files Units All coordinated model files shall be in metres. Standard detail drawings, sections and component models may be in metres or millimetres. Where such details are incorporated into coordinated models they shall be scaled to metres. Dimensions may be displayed in metres or millimetres in accordance with normal practice. Coordinates All projects shall be developed in the appropriate local grid as defined by IAN 99/07. All levels shall be relative to Ordnance Datum Newlyn (ODN).

7 Supporting files of coordinated data may be in the Ordnance Survey's National Grid 1936 (OSGB36) coordinates. The selected zone and height band identifier for the project, as defined in Section 5. of IAN 99/07 ( B17H1), is to be recorded in the Highways Agency Supply Chain Portal. See Appendix B. File Types No limitation is imposed by this Standard on the software, file formats or versions used within an organisation, or by mutual agreement between supply chain parties. However, where delivery is to the HA, or to a project data room, or where future recipients are unknown, or they use incompatible systems, then the appropriate file types, formats and structures defined in this Standard shall be used.

8 No file format version that has been fully released for less than two years may be used for such delivery without agreement. Rationale of data structure This Standard sets a consistent framework for the creation and development of information that may eventually feed into the HA asset databases. Property data may be attached to the geometric modelling during the design and construction phases. No folder structure is stipulated. The supply chain is free to choose an appropriate document management method. Files are named in accordance with BS1192:2007, using the conventions for each field set out in Section 2, Layers within CAD files are named in accordance with BS1192:2007, using the conventions for each field set out in Section The Classification field of the layer name adopts Uniclass2.

9 3D-modelled asset objects will each carry an assigned unique identifier (as an attribute, tag, GUID etc). Each object may correspond to all, or part of, one of the assets in the HA databases. The unique identifiers are used to link the modelled objects to tabular schedules, databases, details, specifications, photographs etc in BIM viewing and manipulation tools, and the HA. databases. IAN 184/14 Page 5 of 41 Sept 14. INTERIM ADVICE Note 184/14 . Highways Agency Data & CAD Standard 2. File names All deliverable or exchanged computer files that are created specifically for the HA. project shall be named in accordance with this Standard .

10 Files that are not specific to the HA project under consideration, and which have well recognised naming conventions, need not be renamed for each project. Examples of these include tiled Ordnance Survey vector or raster mapping, files from adjacent HA. or other infrastructure projects or third-party record drawings that are named in accordance with BS1192:2007. BS1192:2007 defines that file names are composed of fields , separated by hyphens, in the specific order: The file extension is not affected, and remains associated with the relevant software. No other hyphens are permitted in the file names.