At least in Revit's "world".
This is a common point of confusion when people start using Revit phasing tools, real versus virtual, Revit's "reality" versus real "reality".
Demo is not a phase in "Revit land". It's a phase in "People land" because people do demolition things before some other construction things. Revit however considers demolition to occur during the new work. You have an existing building and then do new work...demolition is no different from erecting a new wall to Revit. The phasing tool is focused on showing things graphically not how we "people" think of managing our construction tasks. I can do demolition in one room while someone is painting new paint on a wall in another.
[Edited 8/16/2011] After a couple of emails I decided to alter this post a bit. To restate my initial premise:
This is a common point of confusion when people start using Revit phasing tools, real versus virtual, Revit's "reality" versus real "reality".
Demo is not a phase in "Revit land". It's a phase in "People land" because people do demolition things before some other construction things. Revit however considers demolition to occur during the new work. You have an existing building and then do new work...demolition is no different from erecting a new wall to Revit. The phasing tool is focused on showing things graphically not how we "people" think of managing our construction tasks. I can do demolition in one room while someone is painting new paint on a wall in another.
[Edited 8/16/2011] After a couple of emails I decided to alter this post a bit. To restate my initial premise:
- Revit does not require a separate phase for demolition in order for the phase filters and graphic overrides to work.
5 comments:
I have always found it helpful in training others to have them think of phasing in terms of deliverables and/or years.
Phase 1 = 1970 = Original Building
Phase 2 = 1983 = Addition 1
Phase 3 = 2011 = Addition 2
Demolition activity of original building that occurred in 1983 is not a phase.
I've always said that demolition is 'An action' not a phase. That is why you have that nice little sledgehammer tool! You can use it to perform the action of demolition on objects in your model. Phases are not explicit actions, they are windows of time where change occurs. Managing windows of time is something that is not done by a tool like the hammer rather is is done in a sequential list like the one that is provided to you in 'Manage Phases'
AWESOME WAY TO PUT IT. I remember in revit 2009 doing a Demo phase 1st revit project and learned the hard way. Yikes Thanks for sharing. Cheers
Maria
Interesting post and how to look at phases.
The issue we are having is related to cost specifications and using the phases to determine what is being demolished and what is replacing or being added in schedules. In this regard demo is a "phase" as we need to split the costs. So far we haven't found a better way to determine the costs, any idea's?
regards
If putting elements on their own demo phase is helping you do cost estimating then you've got a good reason to "break the rule". Revit does not "need" a separate phase to show the graphically difference between them.
Estimating inside Revit is not a one-button exercise regardless because schedules are focused on specific categories. It take many schedules to tell the story and even with those there is no way to compile their tales into a single summary.
That's why exporting to other tools (Autodesk's QTO is one example) is the current "best scenario". Estimators all have their own ideas about how to assemble their information into a coherent story, so no single tool (apart from Excel) seems to stand-out for this yet.
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