I'm planning to expand my garage by buiding a addition to the side of it for extra storage. I will be pouring a new concrete slab approximately 4" to 5" thick. I very much dislike trying to drill in hard concrete after it sets. I will be having 2x4 walls. What I need to know before I get started is how to attach the 2x4 walls to the concrete slab. Not sure if I should put in some type of bolts or anchors or straps in wet concrete slab right after pouring cement slab and if so how many ever so many feet? Is there a way to know exactely where to place them so the 2x4 walls will line up? I guess I need to make sure they're not where a stud will be. Do I need to use pressure treated 2x4 for the bottom plate of 2x4 wall? Any help would be greately appreciated.

Brick wall at the garage door frame has less than a 1/8th in gap at the bottom but nearly 2 inches at the top. The door frame and the outside of the wall show to be in square. The gap begins to open at about the 1 ft level ( 1/8inch approx. )and gets to the 2 inch mark at the top of the frame. Garage apron has not sank but I am at a loss as to why this gap continues to grow. Anyone have any ideas.....:wall: :wall: Thanks Scott