# Subtracted door opening Width from room boundary

**URL:** <https://forum.dynamobim.com/t/subtracted-door-opening-width-from-room-boundary/37580>\
**Category:** Packages\
**Tags:** revit, dynamo\
**Created:** [June 25, 2019, 2:13pm UTC](https://forum.dynamobim.com/t/subtracted-door-opening-width-from-room-boundary/37580 "2019-06-25T14:13:43Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![hamzeh\_ahmad\_1989](https://avatars.discourse-cdn.com/v4/letter/h/eb9ed0/32.png) [@hamzeh\_ahmad\_1989](https://forum.dynamobim.com/u/hamzeh_ahmad_1989)\
**Post date:** [June 25, 2019, 2:13pm UTC](https://forum.dynamobim.com/t/subtracted-door-opening-width-from-room-boundary/37580/1 "2019-06-25T14:13:43Z")

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Hi , i have a question how to subtract the door opening Width form the inner finish room boundary , i am very appreciated for the help

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**Author:** ![Nick\_Boyts](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/nick_boyts/32/76313_2.png) [@Nick\_Boyts](https://forum.dynamobim.com/u/Nick_Boyts)\
**Post date:** [June 25, 2019, 2:31pm UTC](https://forum.dynamobim.com/t/subtracted-door-opening-width-from-room-boundary/37580/2 "2019-06-25T14:31:39Z")

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Show us an attempt so we can help you where you need it. Start with getting the room boundary and the door for a specific room.

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**Author:** ![hamzeh\_ahmad\_1989](https://avatars.discourse-cdn.com/v4/letter/h/eb9ed0/32.png) [@hamzeh\_ahmad\_1989](https://forum.dynamobim.com/u/hamzeh_ahmad_1989)\
**Post date:** [June 25, 2019, 2:48pm UTC](https://forum.dynamobim.com/t/subtracted-door-opening-width-from-room-boundary/37580/3 "2019-06-25T14:48:56Z")

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Hi Nick ! what i am trying to get is the red lines boundary, mean the innen boundary without door , to be similar to the right picture result in Dynamo

 ![Room](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/5/e/5e0b483b85c5348b1fd2403ddfff59521e0b95f9.jpeg)

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**Author:** ![Nick\_Boyts](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/nick_boyts/32/76313_2.png) [@Nick\_Boyts](https://forum.dynamobim.com/u/Nick_Boyts)\
**Post date:** [June 25, 2019, 6:46pm UTC](https://forum.dynamobim.com/t/subtracted-door-opening-width-from-room-boundary/37580/4 "2019-06-25T18:46:48Z")

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Looks similar to me. What’s the problem?

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**Author:** ![hamzeh\_ahmad\_1989](https://avatars.discourse-cdn.com/v4/letter/h/eb9ed0/32.png) [@hamzeh\_ahmad\_1989](https://forum.dynamobim.com/u/hamzeh_ahmad_1989)\
**Post date:** [June 25, 2019, 7:39pm UTC](https://forum.dynamobim.com/t/subtracted-door-opening-width-from-room-boundary/37580/5 "2019-06-25T19:39:00Z")

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Hi Nick ! what I have is the whole inner boundary as shown below which is the whole boundary without subtracted the length of the door from it

 ![Capture](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/d/8/d8025f50a847b5e95cd4e737db0ef093e1208a87.png)

do I am trying to get the result to be like this picture ( i edited the picture just to explain what I am aiming to get )

 ![Room](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/5/e/5e0b483b85c5348b1fd2403ddfff59521e0b95f9.jpeg)

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<div class="post-metadata">

**Author:** ![Nick\_Boyts](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/nick_boyts/32/76313_2.png) [@Nick\_Boyts](https://forum.dynamobim.com/u/Nick_Boyts)\
**Post date:** [June 25, 2019, 7:51pm UTC](https://forum.dynamobim.com/t/subtracted-door-opening-width-from-room-boundary/37580/6 "2019-06-25T19:51:57Z")

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You’ll have to get the actual door instance in that room so you know the location. Try looking through the forum for threads relating to room specific elements.