# How to group heading and benching portion separate in a tunnel model?

**URL:** <https://forum.itascainternational.com/t/how-to-group-heading-and-benching-portion-separate-in-a-tunnel-model/2391>\
**Category:** 3DEC\
**Created:** [June 7, 2026, 2:23pm UTC](https://forum.itascainternational.com/t/how-to-group-heading-and-benching-portion-separate-in-a-tunnel-model/2391 "2026-06-07T14:23:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tanvikedare](https://avatars.discourse-cdn.com/v4/letter/t/ac8455/32.png) [@tanvikedare](https://forum.itascainternational.com/u/tanvikedare)\
**Post date:** [June 7, 2026, 2:23pm UTC](https://forum.itascainternational.com/t/how-to-group-heading-and-benching-portion-separate-in-a-tunnel-model/2391/1 "2026-06-07T14:23:20Z")

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Hi all. Ive been trying to use the tunnel function in my 3dec v 5.2 to create a tunnel but in order to group it in two parts I am unable to model the false invert and bifurcate the tunnel in two, basically heading and benching. If you have any idea as to what can work please do share !

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**Author:** ![jhazzard](https://avatars.discourse-cdn.com/v4/letter/j/4af34b/32.png) [@jhazzard](https://forum.itascainternational.com/u/jhazzard)\
**Post date:** [June 19, 2026, 1:22pm UTC](https://forum.itascainternational.com/t/how-to-group-heading-and-benching-portion-separate-in-a-tunnel-model/2391/2 "2026-06-19T13:22:17Z")

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We (Itasca) don’t officially support these old versions any more. Other people on this forum might help out here. If you want Itasca help, please upgrade.