Cliff... nice looking slab, as far as slabs go.... LOL.... /forums/images/graemlins/grin.gif Suggestion from experiance... Get a masonry blade and cut a saw kerf along the top edge where the slab starts to drop. This cut should be about 3/4" ~ 1" deep. The building will be warmer than the apron and this will cause cracking. You want the cracking to be along the saw kerf, not some where else. When I had my garage floor poured, the concrete contractor suggested to pour the apron at the same time. I wanted to do it at another time and he agreed. Part way through the pour, we ran out of concrete and had to get another delivery of the minimum yardage. We had concrete left over and he said, that rather than waste the concrete by leaving it on the truck we should pour the apron. I reluctantly agreed and we put in additional wire and re rod from the floor to the apron. We also put in a grooved "joint" that it was supposed to crack on if it cracked. That groove is about 1/2" wide and deep. This winter, I notice that it was cracking, but not where it was supposed to. This is after 3 winters!! That is why I suggest the deep cut along the top side of the apron. I poured the other aprons after the floor, so there is a joint and none of them has cracked where they meet the floor. I do have them pinned with rerod to the slab, so they can't drop or pull away. I do have one crack in one apron, because the person that I was working with, who was a concrete worker, said that crack line joints weren't necessary. That large apron, 6' x 30' has a crack in the middle from the front to the rear, exactly where I wanted to put a joint. Now I don't let others talk me out of doing what I know is wrong, just because they are helping me with the job.