The floor in my garage has a large 1'6" x 1'6" area in the corner that was left unpoured. Do I need to set up forms to pour concrete in this? Do I need to use rebar for such a small area? Or can I just pour it straight in to the hole?
Before filling in this hole talk to the contractor that did the garage floor or whoever asked for this hole to be left that way. Is this access for something specific like a shutoff valve or cleanout? It is more work for a finisher to leave a 18"x18" area in a concrete floor out then to just do the whole floor. Seems to me there is a reason for this hole. Do some investigating before you just fill it with concrete and possibly regret it later.
from what I can see, it serves no purpose. it does have wire mesh in the bottom covered up with dirt, nut, bolts, screws, nails, springs and other misc. rusty crap that has been collecting over the years. it's almost as if they just ran out of concrete and decided to cut a corner... I'll ask the previous owner before I proceed any further to be on the safe side..