Semels ( ground beams ) Can't be trimmed to the edge of the foot

[Anonymous]

I Tried to extend and trim semels ( ground beam ) to the edge of the footings but still there are triangles appear outside the foot edge

please take a look of the attached pic. 

[Anonymous]

This is another pic

[ToanDN · Accepted solution]

Use opening by face tool to trim them.

[Anonymous]

Is there any video for this command, Thanks for your time

[ToanDN]

See link below. https://knowledge.autodesk.com/community/screencast/e50b0cc8-98f5-413c-8a37-e90148371e1f

[Anonymous]

Excellent,,, I appreciate your help, Thanks,

[Anonymous]

Is it okay to get this warning after finishing cut by face order " Opening partially cuts its host." and what does it mean ?

[ToanDN]

It is okay to ignore the warning. An opening by definition is inside the boundary of the slab entirely. You only cut a corner of the slab so it doesn't fit the definition.