2nd Qatar BIM User Day Scheduling, QTO and Estimating Technology
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The document discusses the 2nd Qatar BIM User Day, focusing on the use of 4D modeling for project scheduling and quantity take-off. It outlines strategies, software capabilities, and limitations of 4D scheduling, emphasizing the importance of accurate 3D models and effective data exchange. Key recommendations include rule-based linking for enhanced performance and the visualization of construction programs to improve communication among stakeholders.
2nd Qatar BIM User Day Scheduling, QTO and Estimating Technology
- 1. 2nd Qatar BIM User Day “Technology is the key to success” BIM for Project Scheduling and Quantity Take-Off Dr. Racha Chahrour HOCHTIEF ViCon Qatar W.L.L. www.hochtief-vicon.com Dr. Racha Chahrour HOCHTIEF ViCon 1
- 2. Agenda 1. 4D Model Creation Strategy 2. 4D Scheduling Software 3. Quantity Take Off 4. Summary Dr. Racha Chahrour HOCHTIEF ViCon 2
- 3. 4D Model Creation Strategy Major Elements 3D Model 4D Model Schedule Dr. Racha Chahrour HOCHTIEF ViCon 3
- 4. 4D Scheduling Software Import Available Software Systems Program 3D Model Create 4D 4D Editors Dr. Racha Chahrour HOCHTIEF ViCon 4
- 5. 4D Scheduling Software Manual Linking in NavisWorks Structured 3D Selection Sets Schedule activities Links Dr. Racha Chahrour HOCHTIEF ViCon 5
- 6. 4D Scheduling Software Rule-based Linking in NavisWorks Parameter based search sets Parameter Linking rules Dr. Racha Chahrour HOCHTIEF ViCon 6
- 7. 4D Scheduling Software Manual and Rule-based Linking in Synchro Attributes 3D objects Linking rules Attribute scheduling tasks Dr. Racha Chahrour HOCHTIEF ViCon 7
- 8. 4D Scheduling Software State of the Art Functionalities of 4D Editors • Import various 3D model formats • Support major scheduling software • Construction sequence animation • Synchronisation of model and program data • Rule-based activity linking Visual Schedule Analysis Dr. Racha Chahrour HOCHTIEF ViCon 8
- 9. 4D Scheduling Software Limitations of 4D Editors • Limited export of created 4D model • Complex and time consuming linking process • Focus on visual schedule analysis • High efforts for 4D model updates No Scheduling Support Dr. Racha Chahrour HOCHTIEF ViCon 9
- 10. Quantity Take Off Model-based Quantities - Creation Strategy / Software Specs 3D Model Filled BOQ with modelbased Quantities Dr. Racha Chahrour HOCHTIEF ViCon 10
- 11. Quantity Take Off Structural Elements • Elements: • Columns • Walls • Ceilings • Beams • Quantities with the corresponding structural elements Dr. Racha Chahrour HOCHTIEF ViCon 11
- 12. Quantity Take Off Rules of Measurements • All openings like doors, windows, ceiling fretworks are subtracted -according to the QRM- of the corresponding structural elements • If wall and beams intersect, the intersection area is subtracted of the wall Dr. Racha Chahrour HOCHTIEF ViCon 12
- 13. Quantity Take Off Visualisation of Object Attributes • Walls, columns and ceilings may have different qualities. e.g. walls: a. Drywalls b. Blockwork c. Concrete a. c. b. • So different types of walls are displayed in different colours Dr. Racha Chahrour HOCHTIEF ViCon 13
- 14. Quantity Take Off Finishing Works • Finishing works can be calculated over the rooms • A room is bounded by vertical and horizontal structural elements Dr. Racha Chahrour HOCHTIEF ViCon 14
- 15. Quantity Take Off Process Requirements • Full definition of model requirements at project start to ensure re-usage of 3D models • Definition of the model structure considering construction joints • Usage of appropriate agreed/standarised description for 3D model elements • Implementation of rules of measurement to consider small openings • Easy access to created data for all stakeholders Dr. Racha Chahrour HOCHTIEF ViCon 15
- 16. Summary • Latest technology is generally able to meet common project requirements • Rule-based schedule linking would improve performance • Visualising the construction program improves project communication among all stakeholders • Data exchange is limited • Quantity take off requires accurate, structured and qualified 3D models Dr. Racha Chahrour HOCHTIEF ViCon 16
- 17. Thank you for your attention! Dr. Racha Chahrour BIM Manager HOCHTIEF ViCon Qatar W.L.L. www.hochtief-vicon.com Dr. Racha Chahrour HOCHTIEF ViCon 17