Hi all,
I have an error ocurring when trying to run a part l compliance check telling me that 0.02m^2 area of a floor construction is failing the maximum U-value. However, when I locate the room and the construction and try to assign it as something different (i.e. with a lower U-value), the software will not accept the change.
It's extremely frustrating that the software deems it big enough to be flagged as an error but not big enough to assign it as a different construction.
Despite the error being flagged at the start of the compliance check, I ignored it and ran the sim just to check the outcome and on the BRUKL I expected to see the failing U-value highlighted in red font but it wasn't. The Average weighted U-value was within limits and was highlighted green and the maximum occuring U-value achieved was displayed but highlighted in grey.
Has anyone any experience on either of these issues?
For criterion 2 is it just the evaerage weighted U-value that must be complied with?
Cheers,
C
Criterion 2 U-value error
Re: Criterion 2 U-value error
Hi Colin,
Does the area show up as a tiny little line in the assign contruction (i.e. a thin sliver along one wall)?
I'd just trim the wall back a tad and avoid the sliver.
Zap
Does the area show up as a tiny little line in the assign contruction (i.e. a thin sliver along one wall)?
I'd just trim the wall back a tad and avoid the sliver.
Zap
Re: Criterion 2 U-value error
Hi,
I think the sliver idea is probably hinting at the problem here. If you look closely at the geometry of the affected room (the error should direct you to a room (maybe the Room ID) and possibly surface number) then you will likely see an unmatched adjacency or small sliver surface. At worst it will show up as an intersection so the geometry check in ModelIT should help.
Fix the geometry error at this room (or the adjacent rooms) and this error should disappear. better still model carefully and ensure you always snap to grid and you won't face these issues it he first place. Some time and care at modelling stage can certainly lead to a much smoother and more successful analysis workflow.
Phil
I think the sliver idea is probably hinting at the problem here. If you look closely at the geometry of the affected room (the error should direct you to a room (maybe the Room ID) and possibly surface number) then you will likely see an unmatched adjacency or small sliver surface. At worst it will show up as an intersection so the geometry check in ModelIT should help.
Fix the geometry error at this room (or the adjacent rooms) and this error should disappear. better still model carefully and ensure you always snap to grid and you won't face these issues it he first place. Some time and care at modelling stage can certainly lead to a much smoother and more successful analysis workflow.
Phil
IES Worldwide Technical Support
Re: Criterion 2 U-value error
Hi Zap/Phil,
Thanks for the advice, unfortunately, it's not actually a geometry error. There are no intersections or anything similar that are preventing any simulations from running. The problem is that when I try to assign a construction to a surface, the construction will not assign. I thought perhaps because it is a small area that there is a limit as to how small an area you can effectively assign a construction to?
As for trimming the wall back, I can't do that with creating even more hassle because it is adjacent to a double-skin glazing cavity. The building is oddly shaped, completely cylindrical on some floors, and irregularly elliptical on others, all enveloped within a double skin facade. This type of building I think doesn't lend itself to the "create DXF" button.
Regardless, the BRUKL looks right and the average U-value check comes up fine only the max value is exceeded but that doesn't seem to be a big enough error to fail Crit. 2 on (thankfully)
Cheers chaps,
C
Thanks for the advice, unfortunately, it's not actually a geometry error. There are no intersections or anything similar that are preventing any simulations from running. The problem is that when I try to assign a construction to a surface, the construction will not assign. I thought perhaps because it is a small area that there is a limit as to how small an area you can effectively assign a construction to?
As for trimming the wall back, I can't do that with creating even more hassle because it is adjacent to a double-skin glazing cavity. The building is oddly shaped, completely cylindrical on some floors, and irregularly elliptical on others, all enveloped within a double skin facade. This type of building I think doesn't lend itself to the "create DXF" button.
Regardless, the BRUKL looks right and the average U-value check comes up fine only the max value is exceeded but that doesn't seem to be a big enough error to fail Crit. 2 on (thankfully)
Cheers chaps,
C
Re: Criterion 2 U-value error
hmmm... previously assigned cosntruction deleted from database?
just for shits and giggles why don't you export a GEM file to a new project.
See if you can assign/change the construction of the partition in the new model. If you can - have a quick ROI check in your head to see if it's worth re-jigging the project over to the new model... probably not... issue the brukl, explain if needed there was a little glitch but nothing worrying and cash the cheque.
When's the bar open?
just for shits and giggles why don't you export a GEM file to a new project.
See if you can assign/change the construction of the partition in the new model. If you can - have a quick ROI check in your head to see if it's worth re-jigging the project over to the new model... probably not... issue the brukl, explain if needed there was a little glitch but nothing worrying and cash the cheque.
When's the bar open?
Re: Criterion 2 U-value error
This peeves me off so much i could kick IES round the office. Even Hevacomp is clever enough to sort this out.
All my ground floor is 0.25. So how can I have an average of 0.44? Same with my windows. The overall is 2.2 but for some reason ive got a 2.4 error?
Now I have to spend eons trying to find it because there is no simple way specified other than some 'code' 1GNF0000 (13) I mean ffs.
Im off to sulk and place pins into my IES voodoo doll.
All my ground floor is 0.25. So how can I have an average of 0.44? Same with my windows. The overall is 2.2 but for some reason ive got a 2.4 error?
Now I have to spend eons trying to find it because there is no simple way specified other than some 'code' 1GNF0000 (13) I mean ffs.
Im off to sulk and place pins into my IES voodoo doll.
Re: Criterion 2 U-value error
I've been experiencing shooting pains in my chest all morning!
The code should point you in the right direction, it's the ID of the room and the surface index number. The data bar in ModelIT shows room IDs when you select them and when you go down through the levels of the model decomposition you will see the surface index shown.
Use the ModelIT Check Report to generate a list of rooms and their IDs (you can check geometry quality there too)
Phil
The code should point you in the right direction, it's the ID of the room and the surface index number. The data bar in ModelIT shows room IDs when you select them and when you go down through the levels of the model decomposition you will see the surface index shown.
Use the ModelIT Check Report to generate a list of rooms and their IDs (you can check geometry quality there too)
Phil
IES Worldwide Technical Support
Re: Criterion 2 U-value error
well apparently by that score my internal floor/ceiling has an invisible window within it, as my intermediate floor is surface 1 for my other error. GGNF0000 Surf(1). How can I find non existent invisible windows within an intermediate floor?
I solved the ground floor error. It include the internal floors in the calc. Thus i edited the u values of the internal floors and hey presto that one disappeared. Guess it was a slither to external. However i cannot fathom why as each floor was drawn by cad by me with exactly the same perimeter ground to 4th. Anyhoo its gone.
Until i get this resolved i shall place headphones on my IES voodoo doll and play agadoo on repeat. You have been warned.
I solved the ground floor error. It include the internal floors in the calc. Thus i edited the u values of the internal floors and hey presto that one disappeared. Guess it was a slither to external. However i cannot fathom why as each floor was drawn by cad by me with exactly the same perimeter ground to 4th. Anyhoo its gone.
Until i get this resolved i shall place headphones on my IES voodoo doll and play agadoo on repeat. You have been warned.