It would be interesting to see how those schedules are further handled by the contractors, maybe some overview of solutions for construction and BOM management. As always great content!
Often there is a disconnect at this stage as they aren't often using the models themselves, but rather the extracted output (schedules, tables, exports etc.). I have worked with a few builders that actually used Revit also and it was great, they were much more demanding of model quality but the collaboration was so much more efficient.
Interesting video. I was aware of the methods, but still unable to surpass the limitations of Revit scheduling for precise take-offs. I understand that sometimes that might not be the architects role, but in Portugal we are in fact expected to provide a full list of quantities with quite a lot of detail. Obviously there is an associated margin of error, but most of the elements are measured using that last method which becomes quite challenging, as it influences heavily on how you model the building. I've been trying to achieve some pre-defined schedules for that moment and a system of naming and modelling that would suit that goal, but like you said there is still a lot of trial and error before getting it right. There is no magic button!
Yes it can be a serious challenge, especially because most firms don't seem to care how it's done, and often just manually measure drawings or don't QA the data properly. There are other platforms out there like costx and presto but the issue as you identified always comes back to model accuracy and precision of how programs measure.
Great video Gavin. Shows very well the possibilities and some limitations of the software. As you said, costX can do some more stuff than revit, but still there are quite a lot of problems coming from the model limitations....
@@prosperdongyangjiang472 i'm based in sydney. I don't really use those platforms but i have an email on my YT profile i can be contacted by or via LinkedIn.
nice one too thanks for educating us in a fun way and actually u know what our BIM course teacher has recommended this video for us to watch it, and I be like ow he found Aussie (good resource) ;)
I'd check out autodesk university, 7D isn't one of my strong suits currently - Australia doesn't have a lot of it currently. Try this presentation here, the subject matter sounds useful; www.autodesk.com/autodesk-university/class/BIM-Inside-Out-Supporting-Owners-Vision-Smarter-Project-Outcomes-and-FM-2017
Would you be able demonstrate another vedio about what would consider to be a good and bad model.! The more i watch your RU-vid, the more i think i have been using Revit incorrectly all these years!!!
Quite a broad question... typically bad models can have many issues such as warnings, high file size, lots of CAD imports, unorganised, lots of 2D drawing, poor data structure etc. I'll try to think of how I could make a video on the topic though...
Hi how r u ..I have one confusion regarding beam is why u create another length and also reporting parameter to that beam...if we just set the unit value to per metre to that beam ..and what about the steel inside beam. then .....??and the last about paint costing? Plz reply me....thanku take care
I use a reporting parameter as the standard length parameter doesn't take into account coping adjustments. For volume or surface area I'd probably use Dynamo as this can analyse the solid geometry of elements, otherwise you'd need to include a formula with length * cross sectional area of perimeter for volume/face area respectively.
Hey Ausie Man, I m in Vanuatu Using revit for a quite long time I do estimate and quantity in the revit as well. But Is quite time consuming for me sometime when setting up and getting up the final cost of a building bim model. I'm curious how to shortcut the process using dynamo. do a tutorial for that plz
If you check my dynamo playlist and revit playlist i have a more recent pair of videos about how to preconfigure objects for cost takeoff to power bi. The key is having a good system initially.
This is a tough tutorial to do, you clearly have a thorough understanding of the ins and outs of Revit, well done. How long have you been using Revit? Are you self taught?
Indeed it was, hard to decide what to include and omit - 5D is a beast of a topic to cover and teach. I've been using Revit for about 10 years now, pretty much picked it up on my first day on the job and went from there. Most of what I know is self taught, but I've learnt from tips by others here and there for some of the more complex things! These days I'd say I learn 100% from trial/error and experimentation.
Thats the best way to learn anything its self taught cause most ppl yiu meet are not good teachers. They can be good workers or designers but they can't relay what they do to others very much liie zombies or robots or CAD monkeys...
By the way I think we can't create reporting parameter to system familes that's why when increase or decrease the length of wall its wil automatically update in costing am I right? And that's why u create rep parameter to that beam is it's correct plz tell me??
Reporting parameters typically just report their value for use in formulae, whilst non-reporting parameters have the ability to adjust and drive constraints. In the case of the beam, I use this as the beam is already driven by its reference planes, but I want to report the length as a parameter so I can use it in a formula to drive the beam cost parameter. There's a good summary here; knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/Revit-Model/files/GUID-DBC31A77-813A-47E0-8EFA-B6D821F75EDB-htm.html
That comes down to a business, which usually drives those rates. Typically you would factor these into the rate cost or create a separate parameter to relate to a suitable metric. You wont find those rates from a public database or resource as each market and supplier will vary.
@@AussieBIMGuru my question is" i have that data with me, how to link that data to model in a way to achieve Earned value management having a proper S curve of monthly cashflow"
@@ukasha47 if the data has to be in Revit then you'll need dedicated type parameters to store data to in all related objects. From there you can either use a tool like Dynamo or BIMLink+excel vlookup matching to introduce the additional data when needed. You'd need to use calculated schedule values to calculate the rates * cost. My preferred method is to export the data to excel with codes to match externally however. I'd suggest for data that detailed you are better exporting it out using Dynamo or similar, and using a dedicated cost platform like costx or bexel to measure and match the rates.
Im not 100% sure what you mean, do you mean converting units to become unitless in formulae? This is a bit like algebra, look at the unit as a variable (e.g. 4m2 = 4z). As a result the unit can be added or reduced using multiply/divide (e.g. 4z2 / z / z = 4).
Hi Victor, I'd advise that you research what you need BIM for and the type of classification systems you need to work with first before going in too deep. I'd suggest exploring the Uniclass 2015 framework and cost platforms like Presto or CostX to see which is most suitable to your business' needs.
These elements are all schedule-able. Columns and beams can be scheduled by length and/or type, slabs can be scheduled by thickness/surface area and you can use these figures to drive a cost estimation process if you have a table of cost rates to apply. Sometimes I know volume is used as a metric for takeoff vs linear metre so in this case Dynamo could be used to assess solid volume of elements.
No I want to know about my rebar quantity floor and level vise with each element . Can you make a video of this . Simple 3 story structure. With all rebar arrange in each element like slab beam column etc. Now you have to find. How much rebar is each host and level taking kindly guide . It would be great
@@shadmandogar7349 unfortunately I'm not very experienced with the rebar tools yet (I have an architectural background). I would refer to Autodesk University in this case - they may have some presentations on rebar best practices.
Unfortunately most of my experience is architectural so I'm not that familiar with 5D for MEP. Some of the methods here may be relevant (e.g. duct by lm rates) however.
Hard to say, depends on your price range and what other needs you have. I made a video a few weeks ago showing what laptop I use as well as some general recommendations. I understand your challenge, so many choices out there! Consider looking into the 1080ti graphics range (maybe even 2080) as this apparently works well for Revit/VR/gaming setup.
Assuming you know the cost of formwork you can multiply that by the area. Reinforcement would need to be modelled most likely in order to be costed unless you know reinforcement per m3 for elements.
You're welcome Pepe! Typically the best way is to either use Assembly codes from Revit objects (takes time) or save a bit of time using the BIM interoperability tools that come with newer versions of Revit - these can apply a Uniclass 2015 system slightly faster. From here a program capable of viewing cost field data in tandem with element quantities/takeoff could do the trick, such as CostX for example which can support tree data structures like Uniclass.
