Concerns should be left out before the start of the construction. For that purpose, in this post you can read some details about the construction of a square shaped spread footings. Generally, the spread footing is the element that carries the load of the buildings. Hence, they have a great responsibility which should be the result of a precise calculation and correct results. However, there are lots of factors that can affect the spread footings. Such is the soil pressure. Furthermore, the footings can be deformed.
Concerns when Constructing a Spread Footings
Finally, see the pictures below and click the link for more details of this topic.