For a really long balcony with no pillars.
If you want a really long balcony without all the pillars that take up too much pace. Then just go to the downstairs veiw and put the pillars where you want the floor to be, then go to the upstairs veiw and click "undo last move" until all the pillars are gone. If you did this properly you should still be able to put floor where the pillars were.
Hope this works for you too! *-*
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