Foundations and footings. Attached private garages shall be provided
with the same type footings and foundations as required herein for
the principal building. Concrete floors shall be not less than four
inches in thickness. Detached private garages may be built with a
continuous floating slab of reinforced concrete not less than four
inches in thickness. Reinforcement shall be a minimum of number 10
six-by-six-inch wire mesh. The slab shall be provided with a thickened
edge all around, eight inches wide and eight inches below the top
of the slab. The thickened edge shall have two #4 horizontal reinforcement
bars placed at the center. The lower reinforcement bar shall be set
two inches above the bottom of the thickened edge and the upper reinforcement
bar shall be set six inches above the bottom of the thickened edge.
Exterior wall curbs shall be provided not less than four inches above
the finished ground grade adjacent to the garage. Bolts 3/8 inch in
diameter with nuts and washers attached, six inches long, shall be
embedded three inches in the concrete curb of detached garages, eight
feet on centers.