It is unlawful for any owner or persons in control of any such structure that is being demolished, or that has been damaged by fire, to leave any portion of the structure unsupported for more than 1 hour, if such section is liable to collapse or is in any way a danger to the public. In no event may a portion of the structure be left unsupported for more than 24 hours. Suitable barricades must be provided to prevent access to the vicinity of any unsupported section of the structure. Any permanent structural supports provided as a result of application to this section must be designed by a structural engineer registered to practice in the State of Oregon and hired by the applicant. All such designs, calculations, drawings, and inspection reports must be approved by the City Administrator.

All combustible debris or material must be removed from the premises on which the demolition is carried out within 30 days from the completion of the demolition, or from the stoppage of the work thereon if the work remains uncompleted. All non‑combustible debris or material resulting from demolition must be removed within 30 days after the completion of the demolition or stoppage thereof, unless the City Administrator extends the time therefore because of weather, terrain, or other special circumstances, but such extension may not exceed 3 months. It is unlawful for any owner or person in possession of real property to permit the debris to remain on the property without disposal in excess of the periods mentioned above or of any specific extension thereof as set forth above.

Any of the above-mentioned things existing while there is a duty to remove or correct the same constitute a public nuisance. Any unsupported portions of a building or structure existing beyond the periods set forth above are subject to summary abatement by the City. The abatement will be in accordance with the procedure set forth in Title 29, Chapter 29.60, Administration and Enforcement.

All structures to be demolished must be taken down in a safe manner. The streets or sidewalks may not be littered with rubbish and must be wet down, if necessary.  During any demolition work, all receptacles, drop boxes, shafts, or piping used in such demolition work must be covered in an appropriate manner. After removal of any structure all foundations that are not to be used for new construction must be removed and all excavations filled in compliance with Chapter 24.70 of this Title, to a level of the adjoining grade.  Plans must be submitted for any new construction proposed, utilizing the remaining foundations. Any remaining foundations approved for further use must be barricaded by a fence no less than 6 feet high maintained until the new construction has progressed sufficiently to remove any hazards to the public. Such period of time is not to exceed 30 days. For regulations on the use of public streets and protection of pedestrians during demolition see Chapter 24.40 of this Title.