# Quantity determination doesn't work or is very slow - especially with steel **URL:** \ **Category:** Feedback\ **Created:** [October 26, 2026, 6:06am UTC](https://community.qonic.com/t/mengenermittlung-funktioniert-nicht-bzw-sehr-langsam-vor-allem-bei-stahl/395 "2026-10-26T06:06:47Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Franz\_Madl](https://yyz1.discourse-cdn.com/flex011/user_avatar/community.qonic.com/franz_madl/32/343_2.png) [@Franz\_Madl](https://community.qonic.com/u/Franz_Madl)\ **Post date:** [October 26, 2026, 6:06am UTC](https://community.qonic.com/t/mengenermittlung-funktioniert-nicht-bzw-sehr-langsam-vor-allem-bei-stahl/395/1 "2026-10-26T06:06:47Z")
![image](https://canada1.discourse-cdn.com/flex011/uploads/qonic/original/1X/cfeb6a41ddf8dd3312db9d6351b3afc5308b6382.jpeg) ---
**Author:** ![Franz\_Madl](https://yyz1.discourse-cdn.com/flex011/user_avatar/community.qonic.com/franz_madl/32/343_2.png) [@Franz\_Madl](https://community.qonic.com/u/Franz_Madl)\ **Post date:** [October 26, 2026, 6:13am UTC](https://community.qonic.com/t/mengenermittlung-funktioniert-nicht-bzw-sehr-langsam-vor-allem-bei-stahl/395/2 "2026-10-26T06:13:51Z")
It works with a small selection and unit of length - however, the geometry is not correct for some steel components - it seems to be a conversion error from IFC. We have had such problems in Allplan before with long, thin, round components! ![image](https://canada1.discourse-cdn.com/flex011/uploads/qonic/original/1X/6d24b90feba92b14d741f5471edec030b45cc18b.jpeg) ---
**Author:** ![Dieter](https://yyz1.discourse-cdn.com/flex011/user_avatar/community.qonic.com/dieter/32/106_2.png) [@Dieter](https://community.qonic.com/u/Dieter)\ **Post date:** [October 30, 2026, 11:23am UTC](https://community.qonic.com/t/mengenermittlung-funktioniert-nicht-bzw-sehr-langsam-vor-allem-bei-stahl/395/3 "2026-10-30T11:23:03Z")
Hello Franz, Thanks for sharing your experiences of using Qonic. For ‘blocking’ issues like this, it’s quicker to use the help function in the app or email [support@qonic.com](mailto:support@qonic.com). This also ensures that the community pages remain a place for ideas for new functionality. ---
**Author:** ![Dieter](https://yyz1.discourse-cdn.com/flex011/user_avatar/community.qonic.com/dieter/32/106_2.png) [@Dieter](https://community.qonic.com/u/Dieter)\ **Post date:** [October 30, 2026, 11:23am UTC](https://community.qonic.com/t/mengenermittlung-funktioniert-nicht-bzw-sehr-langsam-vor-allem-bei-stahl/395/4 "2026-10-30T11:23:50Z")
To answer your question, the reason for these slow calculations is probably the tessellated geometry of the rebar. This is a known issue, and we are looking into ways to improve the quality of this geometry while recognising that these are rebars. This will speed up the quantity calculation, but it will also open up other possibilities, such as creating files to directly instruct bending machines. As far as I know, this will be a feature that no other Ifc software can offer. It’s good to see that our development work is in line with your needs.