As used in this chapter, the following terms
shall have the meanings indicated:
PORTABLE STORAGE UNITS
Transportable units (with or without wheels) used primarily
for temporary storage of building materials, household goods, personal
items, business goods and/or products including inventory and other
materials for use on a limited basis. The minimum size of such units
subject to this chapter shall be either 640 cubic feet, or any such
unit that has a length, width or height of 10 feet or more.