(a) A ramada may be erected, constructed, or maintained on a lot only as an accessory to a unit located on the same lot.

(b) A ramada shall be designed and constructed as a freestanding, self-supporting structure meeting the structural requirements for cabanas as specified in section 1446.

(c) A ramada shall not be enclosed or partially enclosed on any side or end, except that the sides may be enclosed when the ramada roof is continuous with the roof of a cabana constructed on the sides of the unit.

(d) A ramada or any portion thereof shall have a clearance of not less than eighteen (18) inches in a vertical direction above any plumbing vent extending through the roof of a unit and not less than six (6) inches in a horizontal direction from each side of a unit.

(e) A minimum of two (2) ventilating openings shall be installed at the highest point in the ramada roof to eliminate the buildup of products from vents or ducts. Vent openings shall be located near the ends of the ramada for cross-ventilation and shall have a minimum cross-sectional area of twenty-eight (28) square inches. Chimneys or vents of fuel burning appliances shall extend through the ramada roof surface and shall terminate in an approved roof jack and cap installed in accordance with the appliance listing and the manufacturer's installation instructions.