You will need to prepare a space that is large enough for your structure, and to accommodate installation of the carport or metal storage building. Start by measuring the width of the space to see if you will be able to have a level area large enough. Then measure the length of the space and again make sure that area is level.    The height is defined as the lowest point closest to the sides of the structure. This is the point known as the “eave height” the “leg height” or the “sidewall height.” Make sure when you measure for space that any vehicle or equipment that you plan to store in the carport, garage, or RV carport is shorter than the structure’s eave height. If you plan to enclose the carport or RV carport at a later date, be sure the structure is also large enough to accommodate a garage door that can also fit the vehicle.