Other provisions and requirements for light industrial and industrial uses are as follows:
(a) Parking, Loading and Unloading Berths.
(1) Each industrial use shall provide parking space for each three (3) employees located on the same lot as the use, or within three hundred (300) feet on a site approved by the Board of Zoning Appeals.
(2) Each industrial use shall provide loading and unloading berths located on the same lot as the use, as specified in Section 1331.07.
(3) Parking space requirements may be waived by the Board where fifty percent (50%) or more of the area in a block was occupied by business or industrial structures at the time of passage of this Zoning Ordinance.
(4) Groups of uses requiring parking space may join in establishing group public or employee parking areas with capacity aggregating that required for each participating use. (1969 Code §27-40)
(b) Rear Yard Requirements. One-half of an alley abutting the rear of a lot may be included in the rear yard, but such alley space shall not be included for loading and unloading berths. (1969 Code §27-38)
(c) Height Regulations.
(1) The building height requirement in Section 1331.07 may be increased if the buildings are set back, from front and rear property lines, one foot for each two (2) feet of additional height above the maximum building height requirements.
(2) Chimneys, cooling towers, elevator bulkheads, fire towers, penthouses, tanks, water towers, transmission towers or essential mechanical appurtenances may be erected to any height not prohibited by other laws or ordinances. (1969 Code §27-39)
(d) Principal Buildings. In all industrial districts, it is permissible to erect more than one principal building on a lot. (1969 Code §27-41)