In scientific classification of biota, a subphylum is a taxonomic rank in zoological nomenclature. The taxonomic rank of 'subdivision' in fungi and plant taxonomy is equivalent to 'subphylum' in zoological taxonomy.
Another general rule is that your driveway should be around 10 to 12 feet wide, and a few feet wider at the curves. If you have space, itâs always a good idea to provide a larger area at the top for turning around or for additional parking when needed. A 12âx18â space or larger is ideal for this.
A minimum of 4 inches is recommended. Keep in mind that the 2 x 4âs often used to form driveways are only 3 Â½ inches wide, so the ground inside the 2 x 4 forming needs to be removed at least Â½ inch below the bottom of the form. Thickness is the major factor (even more than the strength of the concrete) in determining the drivewayâs structural capacity.