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Quadrangle Architects Revit Workshop
Transcript of Quadrangle Architects Revit Workshop
•What are the deliverables? With the vast potential for embedded information in the BIM, fees have to be aligned with a clear understanding of the deliverables. Your firm should have a BIM Execution Plan
Reference Templates include:
- AIA Document E202 – 2008: Building Information Modeling Protocol Exhibit
- ConsensusDOCS 301: Building Information Modeling (BIM) Addendum.
•Increased overhead with no direct compensation: Hardware, Software, Training, Re-Staffing. Costs associated with add-on, etc
•Potential for additional services and associated Fees. The Building Information Model can be leveraged for energy analysis, daylighting studies, shadow studies, costing, renderings, integration with Facility Management software (FM)
•Sharing the model: Add a clear definition of the model’s end purpose. Have a good disclaimer.
•Model Licensing and copyright
•When possible, offer limited release of the model as DWF, DWG, PDF, etc, to prevent having intellectual property released and accessible to other parties
•Risks and liabilities: consider risks inherent from BIM
•Who is responsible when project participants must rely in part upon what is contributed to the model by other participants?
•Are the design team and contractors separate in their liabilities and responsibilities?
•Collaboration may also gray the line of ownership as it may be vested in multiple parties. BIM users need to consider what avenues are necessary in contract to assure ownership of any contributions to the project
•Confidentiality issues need to be addressed. If there are numerous participants in a project it may be impossible to provide confidentiality
•Liability associated with software malfunctions such as irretrievable data, or intelligent BIM systems making inaccurate changes
•Liabilities associated with data transfer and translation k. Contract •IT Department should have an understanding of how the Revit file system works
•All team members from the same project should have computer of similar performance. One slow computer in a team will slow down all other users
•Losing network connection or moving/renaming Revit project files will break the link and make local Revit files unusable
•If working with joint ventures, IT needs to review Firewall and access to prevent a file from not being able to complete saving
•If working with the Revit Server, a dedicated desktop running Windows Server to serve as central location for the central files is needed j. The role of the IT department with BIM •Joint ventures can work best if the teams work in the same office
•If teams are away, options are VPN with either Revit Server, remote desktop or a web accelerator device
•The scope of work should define how the project will be documented. All drawing sheets coming from one model or each model independently
•For consistency, the office Revit template file as well as Revit content should be given away to the joint venture
•There's no way to protect content in Revit. If one office spent thousands of dollars and time creating a great template and library of content, they can be easily used by anyone once it is sent i. Working with joint ventures •If they are using Revit, consultants should get on board earlier
•Architect should call a meeting as soon as consultants are selected
•Key topic: What’s the BIM model for? Define deliverables
•Key topic: What should be modeled and to what extent? Avoid "over modeling"
•Key topic: How models should be divided for each discipline? Different phases, different owners, different tender, etc.
•Key topic: Who owns what and who models what? Grids, levels, etc.
•Key topic: What about levels? Finish floor or top of concrete? Both have pros and cons. It is easier in Revit if it is finished floor
•Key topic: What needs to be copied and monitored? At least levels and grids
•Key topic: Are we using shared coordinates? Yes, for better datum coordination
•Key topic: What worksets do we need? Agree in a number and naming to allow better element visibility with linked files
•Key topic: When, how and what to do before exchange the model? Detaching from Central, purging, checking worksets
•Key topic: Are there any drawing standards to follow? Linked files should follow standard lineweights and styles
•Key topic: How coordination will happen? Hard copies, visual model, Revit Interference Check, Navisworks h. Consultants coordination •Staffing in Revit shouldn't be based on traditional CAD workflow
•In CAD, there will be more efforts required during construction documentation. In Revit, since construction documentation is produced from the model it requires less efforts. Because of this, in Revit there will be a shift of staff: more efforts are required on earlier stages like schematic design and design development
•Revit users are organized around functions like project management, content creation, building design and documentation
•On early schematic design, one or two persons can handle all the tasks
•As a rule of thumb, Revit requires as few as half of the numbers of users required to complete the same job with the traditional CAD method
•BIM is all about communication. Seating the teams together improves workflow
•Students usually don't have enough knowledge about construction. However, usually they are fast learners and can be part of a project team creating sections, elevations, callouts, adding views to sheets, etc.
•Staff with many years of experience in construction but not as fast learners to handle 3D modeling, can help the project team by detailing and annotating
•Using Revit requires more understanding of how a building is put together
•Users learn more about construction by using Revit
•In Revit, users won't spend the day doing the same drafting task (no roles defined for plans, sections, elevations, etc.)
•An excellent CAD user doesn't necessarily mean a prospect excellent Revit user
•Sometimes it's harder to kill the bad CAD habits of a great CAD user. No experience in CAD is not a bad thing
•Being a 3D model savvy, having a positive attitude about BIM is a strong key point
•The rule of thumb is one experienced Revit user for each 5 users with no Revit experience
•Experienced Revit user means a user with at least one successful Revit project experience (project 100% done in Revit)
•The experienced Revit user should be the project "model manager"
•The project model manager should be the person starting the model
•The project model manager is responsible to model complex elements specific to the project, to manage the Central File, to manage links, to delegate other model tasks, to police what other users are adding to the model, to be the main contact person to subjects related to the project BIM model
•Each model managers for each project is also the link between the project and the Office BIM Manager. If an issue in the project can't be solved by the model manager, it will be escalated to the BIM Manager
•A BIM Manager is a full time position required for each office using BIM.
•The BIM Manager is responsible for the office wide BIM standards, templates, family or content creation, meet consultants to define when and how to integrate all models, keep an eye on what's new, market directions, updates, upgrades, attending local user groups, BIM events, selling the BIM capabilities of your firm, etc.
•When hiring a BIM Manager, you should be looking for someone with at least 5 years of experience managing BIM in another firm with at least the same size as yours and experience with "in house" training g. Staffing •It's very tempting using SketchUp for initial studies
•It's very frustrating having to redo the model, this time in Revit, after the study is accepted
•It's very tempting to use CAD to do space planning
•It's very frustrating having to redo it in Revit after the space planning has been accepted
•Revit can be used for early concept and schematic design
•Revit has a massing tool for early stage design
•The mass can be used for sun/shadow studies and solar radiation
•The mass can host building elements that will update to mass changes
•Once de design is accepted, you already have a building model being built
•Drawing walls in Revit is as simple as drawing polylines in CAD
•Walls in Revit bound rooms. Rooms can carry information about area, program area, program code
•Revit can create room schedules with that information and use formulas to help you see the areas that don't meet requirements
•Revit can automatically colour code rooms by department or any other parameter and create a "live" legend
•With external tools, Revit can import/export room data from/to Excel
•The model and the rooms can be exported to energy analysis tools, like Autodesk Green Building Studio to optimize energy efficiency earlier on the design process f. Using Revit for Schematic Design •In CAD you can cheat
•In Revit you can't (at least not easily)
•In CAD you can explode elements, override, change dimensions, etc.
•In Revit, you can't explode. Override is available, as long you don't use it for cheating
•In Revit, you can't see things that don't make sense (i.e. grids that aren't perpendicular to your view)
•In Revit you can't dimension to things that don't make sense (i.e. the radius of a slanted round column)
•Sometimes you need to cheat. There are always workarounds in Revit.
•It may be frustrating not being able to do it, but not allowing to cheat preserves drawing accuracy, consistency and quality e. Cheating vs. Accuracy •In CAD you draw in layers
•Revit doesn't have layers. Each element belongs to a model category
•In CAD, layer styles (by layer) defines how elements will look like when printed
•In Revit, what you see is what you get d. Layers vs. Elements visibility •In CAD, most elements are dumb
•In Revit, all elements have intelligence
•CAD is an electronic drafting tool
•Revit is a modeling tool where all elements carry information and are aware of other elements. Documents are extracted from the model and are always coordinated in real time
•In CAD, virtually you can draft anything you want
•In Revit there are limitations, most of them to prevent user errors
•Revit has the same 2D capabilities you find in CAD
•In CAD, the design changes once, you change multiple times
•In Revit, the design changes once, Revit changes it everywhere c. Lines vs. Elements •If you want an elevation done in 15 minutes, CAD is faster
•If you want to be able to change all plans, elevations, sections and 3D in 15 minutes, Revit is faster
•If your hardware is outdated, CAD is faster
•If your hardware is updated, CAD is still faster. Only with good hardware you'll be able to manage complex and large Revit models
•There's a rule of thumb for hardware: Revit needs 20x the size of the project plus linked files in RAM memory
•Revit takes more time upfront but saves you time later on
•In Revit, drawings won't as look as good as in CAD, until you add elements to the model. Focus on the model!
•A good Revit template takes care of both graphics and modeling overall time
•Because they can, people tend to do more in Revit. Firms should avoid "over documenting". Having an office standard of what sets of drawings are needed as parts of the deliverables is a good idea
•Bottom line: At the end of the project, both may take the same time, but Revit will produce more and will be less susceptible to user errors b. Which one is faster for the average user? •BIM is not a software: It's a process. Revit is not just a 3D modeler. It’s a database.
•Using Revit doesn't necessarily mean delivering BIM
•The "I" letter from BIM (Building Information
Modeling) is as important as the drawings
•BIM should be seen as virtual construction. User should model based on how a building goes together
•There's a shift on the workflow with BIM: Everybody should get on board earlier
•IPD - Integrated Project Delivery: The future of BIM? The construction industry has suffered from a productivity decline since the 1960s while all other non-farm industries have seen large boosts in productivity a. It isn’t 2D vs. 3D! It's BIM 1. Intro: AutoCAD vs. Revit, Management and the BIM advantages
2. Opening Revit
3. Central Files
4. Creating your own copy of the file
5. Revit Interface
6. Working with plan views
7. Working with 3D views
8. Working with CAD files
9. Working with data from the model
10. Printing Partners and Associates Revit Workshop a. It isn’t 2D vs. 3D! It's BIM
b. Which one is faster for the average user?
c. Lines vs. Elements
d. Layers vs. Elements visibility
e. Cheating vs. Accuracy
f. Using Revit for Schematic Design
h. Consultants coordination
i. Working with joint ventures
j. The role of the IT department with BIM
k. Contract 1. Intro: AutoCAD vs. Revit, Management and the BIM Advantages