Section 503.2.1, Dimensions, of the IFC, is hereby amended by deleting said section and inserting in lieu thereof the following:
Section 503.2.1 Dimensions Fire apparatus access roads shall have a minimum unobstructed width of not less than 20 feet (6096 mm), exclusive of shoulders, except for approved security gates in accordance with Section 503.6, and an unobstructed vertical clearance of not less than 14 feet (4268 mm).