Walls and pillars can be joined together. Any number of walls can connect to the pillar as long as space exists on the pillar.
The pillar needs to be joined to the end of a wall; it cannot be added to an existing wall intersection such as the corner of L-joined or T-joined walls.
To join a pillar to a wall:
Click the pillar.
Draw the walls.
If the Auto-join feature is enabled, then the walls automatically connect to the pillar.
If the Auto-join feature is disabled, then click the Wall Join tool from the Walls tool set or the Building Shell tool set and join the walls to the pillar.
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