155.10   PERMANENT OCCUPANCY OF PUBLIC PROPERTY.
1.   No part of any structure or any appendage thereto, except signs, shall project beyond the property line of the building site, except as specified in this code, provided, however, that a structure or appendage thereto may project beyond the property line of the building site when the applicant holds a property interest including but not limited to air rights, within the area of the project sufficient to establish a legal right to build therein or thereon.
2.   Structures or appendages regulated by this section shall be constructed of materials as specified in Section 705 of the IBC and section R302 of the IRC for structures regulated by such code.
3.   The projection of any structure or appendage shall be the distance measured per the definition of Fire Separation Distance as noted in the IBC and section R302 of the IRC for structures regulated by such code.
4.   Nothing in this code shall prohibit the construction and use of a structure between buildings and over or under a public way provided the structure complies with all requirements of this code.