We are going to be marking the location of each stud on them simultaneously with a small framing square that is … To assemble the long garage wall framing components we will start with the 2 x 4 sole plate and top plate by laying lengths of 2 x 4 material side by side on the ground or garage floor. Length: 12 Feet 14 Feet 16 Feet 18 Feet 20 Feet 22 Feet 24 Feet 26 Feet 28 Feet 30 Feet. The first thing to consider before you set out to prepare your garage door frame is that a garage door is (or at least should be) a one-time investment that can either enhance or damage the aesthetic appeal of your building. Hire an engineer before pouring the footings Secure the walls temporarily with braces Height: 8 Feet 10 Feet. How to Build a Garage From the Ground Up Step 1: I Love It When a Plan Comes Together!. Width: 12 Feet 14 Feet 16 Feet 18 Feet 20 Feet 22 Feet 24 Feet 26 Feet 28 Feet 30 Feet. Step 2: Subcontractors. You need to select raw materials and a design that not only fits your garage door needs, but also contributes to overall building’s appearance. As the person who filed the permit, you are the main contractor and responsible for the building.