Newbie hammer question again

[Deathwish-uk-]

How can I make it so my room is joined together by a corridor? I'm guessing I have to create another block for the corridor which is easy enough. But how can I join it to the room?

 

[Ames]

http://collective.valve-erc.com/index.php?doc=1046748955-93414200

No using carve.

 

[Deathwish-uk-]

thanks

 

[Mapster]

it's just like making a normal box :|