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BIM Project IT Guidelines

BIM Project IT Guidelines. Carl Agar – Director Norman Disney & Young July 2011. The Scenario. BIM Project All drawings to be in 3D Federated models being produced Federated models being used for meeting reference Need to share model files via internet PM system. What do will you need.

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BIM Project IT Guidelines

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  1. BIM Project IT Guidelines Carl Agar – Director Norman Disney & Young July 2011

  2. The Scenario • BIM Project • All drawings to be in 3D • Federated models being produced • Federated models being used for meeting reference • Need to share model files via internet PM system

  3. What do will you need • Fast workstations • Central storage • Good backup • Fast internet connection • 3D modelling software e.g. Revit • Federated modelling software e.g. Navisworks

  4. Model Generation & Integration Process

  5. BIM Plan Requirements • Element Classification System • Equipment Naming Protocol • System Naming Protocol • Asset Naming Protocol • Material Naming Protocol • Object Parameters • Visualisation Requirements • Construction Sequencing (4D) • Cost Estimation Modelling Practices (5D) • Data Collection, Release & Transfer • Coordination & Clash Detection • Cad Package Specific • Model Setup & Standards • Project Filing Structure • Location & Orientation • Project Levels & Grids • Site Segmentation • Stakeholder Models Structure • Federated Models Structure • Model Authorised Uses • Required Levels of Development & Authors • Model Naming Protocol • Document Naming Protocol • Room & Space Naming Protocol

  6. BIM Plan Requirements • Element Classification System • Equipment Naming Protocol • System Naming Protocol • Asset Naming Protocol • Material Naming Protocol • Object Parameters • Visualisation Requirements • Construction Sequencing (4D) • Cost Estimation Modelling Practises (5D) • Data Collection, Release & Transfer • Coordination & Clash Detection • CAD Package Specific • Model Setup & Standards • Project Filing Structure • Location & Orientation • Project Levels & Grids • Site Segmentation • Stakeholder Models Structure • Federated Models Structure • Model Authorised Uses • Required Levels of Development & Authors • Model Naming Protocol • Document Naming Protocol • Room & Space Naming Protocol

  7. 3D Model Files • Storage • Backup • Moving

  8. 3D CAD – How big are the CAD files? 115 Batman Street– 3,000m2 office building

  9. 3D CAD – How big are the CAD files? 115 Batman Street– 3,000m2 office building

  10. 3D CAD – How big are the CAD files? 115 Batman Street– 3,000m2 office building

  11. 3D CAD – How big are the CAD files? 115 Batman Street– 3,000m2 office building

  12. 3D CAD – How big are the CAD files? SAHMRI – 28,000m2 laboratory

  13. 3D CAD – How big are the CAD files? SAHMRI – 28,000m2 laboratory

  14. 3D CAD – How big are the CAD files? SAHMRI – 28,000m2 laboratory

  15. 3D CAD – How big are the CAD files? SAHMRI – 28,000m2 laboratory

  16. Moving Files Around • Internally • Externally

  17. Device & Networks Transfer Rates

  18. Getting the Data to the Internet

  19. Network Download Speeds

  20. Network Download Speeds - Theory

  21. Network Download Speeds - Measured

  22. Computers • How Fast

  23. Processor Speed Limits • Practical limit of ~3Ghz clock speed reached in 2003 • Manufacturers turned to hyperthreading & multicore architectures • Multicore is running two or more actual CPUs on one chip • Concurrency is the next major revolution in how software will be written. • HOWEVER - CAD is not concurrent - yet

  24. Computer Specifications - Considerations • Moore’s Law – computing power doubles every 2 years • “What Andy giveth, and Bill taketh away” • CAD is single treaded – only uses one processor core • RAM – rule of thumb – RAM usage will be file size x10 • Operating System • XP – 32bit has 3Gb memory limit • W7 - 64 bit has 16Eb memory limit

  25. Workstations - How much memory? • RAM – rule of thumb – RAM usage will be file size x10 • Test - 150Mb Revit file • 150Mb file expanded to 1.6Gb RAM • 8Gb will do • 12Gb to be future proof Workstation memory usage, OS + Revit 2.65Gb Workstation memory usage, OS + Revit + 150Mb project File 4.22Gb

  26. Workstations - How fast? • CAD is single threaded • HP Workstation – Intel Xeon CPU 3.2Ghz – 4 core processors • Revit running flat out to export a file • Only 50% of one processor active

  27. Workstations - How fast? • CAD is single threaded • HP Workstation – Intel Xeon CPU 3.2Ghz – 4 core processors • Revit running flat out to render an image • ALL processors active

  28. Computer Specifications

  29. Construction Sequencing – 4D • Federated model software – e.g. Navisworks or Navigator • Name, identify and classify components and systems correctly • Indentifying components with a phasing parameter assists • Model for construction – e.g. Draw a slab as it will be poured • Interfaces to project management software, or • Spreadsheet, or • Can contain the sequence in the federated model file

  30. Cost Estimating – 5D • Generally done by interface to the source 3D files, not federated model • e.g. CostX uses a DWF export • Name, identify and classify components and systems correctly • Degree of accuracy needs to be consistent across project • Assists if the QS parameters are applied to equipment:Australian Cost Management Manual – Guidelines for Cost Planning Consulting Services • Can be fiddly to get the export correct – test your files with the target software – CostX have a free viewer

  31. Animations • Federated model software – e.g. Navisworks or Navigator • Done using similar techniques as 4D construction sequencing • Name, identify and classify components and systems correctly • Can be done on a good quality workstation

  32. Simple Rendered Images

  33. Simple Rendered Images • Simple to do in 3D modelling software • Helpful if correct materials and colours applied to systems • Not photorealistic • Can be done on a good quality workstation

  34. Photorealistic – Physical Based Rendering Fluorescent Downlight LED Downlight

  35. Photorealistic – Physical Based Rendering • Basis is a well constructed 3D model • Materials need to be correctly applied • Name, identify and classify components and systems correctly • Single image will tie up a workstation – e.g. 22 hours • Needs high end render farms

  36. Software Upgrades • Beware the software upgrade • Annual releases • Often cliff upgrades • Need to upgrade across the project team • You may been multiple versions to handle different projects • Average large project will need 3-5 software upgrades of all project files.

  37. In Summary • Fast workstations • Fast network • Central storage • Good backup • Fast internet connection – cannot be too fast • Be aware of the impact of software versions

  38. Thank You

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