The best place to install a door into a masonry brick wall is in a non load bearing wall.
Putting a door in a concrete wall.
The opening should be two inches wider than the door frame and about an.
Once you locate a wall then find out the actual position of the door.
Mark the opening size for the door on both sides of the wall.
The cost to dig a full basement verse a crawl space was minimal as was the cost of the additional concrete to pour the walls.
This way you will not have to worry about adding any supports or other beams to take the load of the home.
Score the lines for your opening with a circular saw.