§ 155.31 HI - HEAVY INDUSTRIAL DISTRICT.
   (A)   Purpose. This district provides for heavy manufacturing and industrial activities which generate noise, odor or dust beyond the site boundaries. These regulations are designed to eliminate the negative impacts these uses can have on adjacent areas.
   (B)   Use regulations. Any use permitted in the “LI” Light Industrial District, plus the following, are allowed:
      (1)   Acetylene gas manufacture or storage;
      (2)   Acid manufacture;
      (3)   Alcohol manufacture;
      (4)   Ammonia, bleaching powder or chlorine manufacture;
      (5)   Arsenal;
      (6)   Asphalt manufacture or refining;
      (7)   Blast furnace;
      (8)   Bag cleaning;
      (9)   Boiler works;
      (10)   Brick, tile, pottery or terra cotta manufacture other than the manufacture of handcraft or concrete products;
      (11)   Candle manufacture;
      (12)   Celluloid manufacture or treatment;
      (13)   Cement, lime, gypsum or plaster of paris manufacture;
      (14)   Cement mixing plant for cement, mortar, plaster or paving materials;
      (15)   Coke ovens;
      (16)   Cotton gins;
      (17)   Cotton seed oil manufacture;
      (18)   Creosote manufacture or treatment;
      (19)   Disinfectants manufacture;
      (20)   Distillation of bones, coal or wood;
      (21)   Dyestuff manufacture;
      (22)   Exterminator and insect poison manufacture;
      (23)   Emery cloth and sandpaper manufacture;
      (24)   Explosives or fireworks manufacture or storage;
      (25)   Fat rendering;
      (26)   Fertilizer manufacture;
      (27)   Fiberglass manufacture;
      (28)   Fish smoking and curing;
      (29)   Forge plant;
      (30)   Garbage, offal or dead animal reduction or dumping;
      (31)   Gas manufacture;
      (32)   Glue, size or gelatin manufacture;
      (33)   Grain processing;
      (34)   Hatchery;
      (35)   Iron, steel, brass or copper foundry or fabrication plant;
      (36)   Match manufacture;
      (37)   Lampblack manufacture;
      (38)   Oilcloth or linoleum manufacture;
      (39)   Oiled rubber goods manufacture;
      (40)   Ore reduction;
      (41)   Paint, oil, shellac, turpentine or varnish manufacture;
      (42)   Paper and pulp manufacture;
      (43)   Petroleum or its products, refining or wholesale storage;
      (44)   Pickle manufacturing;
      (45)   Planing mills;
      (46)   Potash works;
      (47)   Pyroxline manufacture;
      (48)   Rock crusher;
      (49)   Rolling mill;
      (50)   Rubber or gutta-percha manufacture or treatment, but not the making of articles out of rubber;
      (51)   Sauerkraut manufacture;
      (52)   Salts works;
      (53)   Shoe polish manufacture;
      (54)   Smelting of tin, copper, zinc or iron ores;
      (55)   Soap manufacture other than liquid soap;
      (56)   Soda and compound manufacture;
      (57)   Stock yard or slaughter of animals or fowls;
      (58)   Stone mill or quarry;
      (59)   Stove polish manufacture;
      (60)   Tallow, grease or lard manufacture or refining from, or of, animal fat;
      (61)   Tanning, curing or storage of raw hides or skins;
      (62)   Tar distillation or manufacture;
      (63)   Tar roofing or water proofing manufacture;
      (64)   Tire recapping or vulcanizing;
      (65)   Tobacco (chewing) manufacture or treatment;
      (66)   Vinegar manufacture;
      (67)   Wool pulling or scouring;
      (68)   Yeast plant.
   (C)   Development regulations.
      (1)   Lot requirements: None;
      (2)   Yard requirements:
         (a)   Front yard:
            1.   Where none of the frontage on either side of the street between two intersecting streets is located in a residential or commercial district, no front yard is required;
            2.   Where the frontage on one side of the street between two intersecting streets is located partly in District “HI” and partly in a residential district, the front yard shall conform to the residential district regulations for a distance of not less than 300 feet from the district boundary;
            3.   Where the frontage on one side of a street is in a residential or commercial district, the front yard requirements of the property directly opposite on the other side of the street shall be not less than 50 feet.
         (b)   Side yard: no side yard is required, except that a side yard or side street yard of not less than 50 feet in width shall be provided on the side of the lot adjoining or across the street from a residential or commercial district.
         (c)   Rear yard:
            1.   None required where an alley exists on the rear of the lot, tract or plot; otherwise a minimum rear yard of ten feet shall be provided;
            2.   When adjoining a residential district, a rear yard of not less than 50 feet in depth shall be provided upon that portion of a lot abutting on or across a rear street from a residential or commercial district;
            3.   Where rail lines exist at the rear of lots or tracts occupied by industrial or commercial buildings, the buildings may be located for direct service by rail transportation.
      (3)   Height requirements:
         Maximum building height: 75 feet.
   (D)   Parking regulations. The parking regulations for the “LI” Light Industrial District will apply, plus the following requirements:
      (1)   No parking, storage or similar use is permitted in the required front, side and side exterior yards within 25 feet of the street line;
      (2)   No parking, storage or similar use is permitted in the required rear yard within 25 feet of the rear property line;
      (3)   Off-street parking and loading regulations: see § 155.47.
(`87 Code, Zoning Ordinance, Art. II, § 12)