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3303.1 Add new sections as follows:
3303.1.1 Buildings other than Type V. The demolition of structures of Types I, II, III and IV construction greater than two stories or 25 feet (7.62 m) in height shall comply with the requirements of this section.
The requirements of this section shall also apply to the demolition of post-tensioned and pre- tensioned concrete structures.
3303.1.2 Required plans. Prior to approval of an application for a demolition permit, two sets of detailed plans shall be submitted for approval, showing the following:
1. The sequence of operation floor by floor, prepared by a registered civil engineer or licensed architect.
2. The location of standpipes.
3. The location and details of protective canopies.
4. The location of truck crane during operation.
5. Any necessary fence or barricade with lights.
6. Any floor or wall left standing.
7. The schedule of the days when the demolition will be done, i.e., on weekdays or on Sundays.
3303.4 Replace this section with the following:
3303.4 Vacant Lot. When a building is demolished, the permittee must remove all debris and remove all parts of the structure above grade except those parts that are necessary to provide support for the adjoining property.
3303.8 Add a new section as follows:
3303.8 Special inspection. A registered civil engineer or licensed architect shall supervise the demolition work in accordance with rules and regulations adopted by the Building Official pursuant to Section 104A.2.1 to assure the work is proceeding in a safe manner and shall submit written progress reports to the Department in accordance with Section 1704.2.4.
3304.1 Add a second paragraph as follows:
The City and County of San Francisco adopts Appendix J for the purpose of regulating excavation and grading.
3304.1 Add a third paragraph as follows:
Temporary wood shoring and forms. All wood used for temporary shoring, lagging or forms that will be back- filled against or otherwise left permanently in place below grade shall be treated wood as defined in Section 2302.
3306.10 Add a section as follows:
3306.10 Chutes. Chutes for the removal of materials and debris shall be provided in all parts of demolition operations that are more than 20 feet (6.096 m) above the point where the removal of material is effected. Such chutes shall be completely enclosed. They shall not extend in an unbroken line for more than 25 feet (7.62 m) vertically but shall be equipped at intervals of 25 feet (7.62 m) or less with substantial stops or offsets to prevent descending material from attaining dangerous speeds.
The bottom of each chute shall be equipped with a gate or stop with a suitable means for closing or regulating the flow of material.
Chutes, floors, stairways and other places affected shall be watered sufficiently to keep down the dust.
3306.11 Add a section as follows:
3306.11 Falling debris. Wood or other construction materials shall not be allowed to fall in large pieces onto an upper floor. Bulky materials, such as beams and columns, shall be lowered and not allowed to fall.
3306.12 Add a section as follows:
3306.12 Structure stability. In buildings of wood frame construction, the supporting structure shall not be removed until the parts of the structure being supported have been removed.
In buildings with basements, the first floor construction shall not be removed until the basement walls are braced to prevent overturning, or an analysis acceptable to the Building Official is submitted which shows the walls to be stable without bracing.
3307.1 Insert a note at the end of this section as follows:
3307.1 Protection required. Adjoining public and private property shall be protected from damage during construction, remodeling and demolition work. Protection must be provided for footings, foundations, party walls, chimneys, skylights, and roofs. Provisions shall be made to control water runoff and erosion during construction or demolition activities. The person making or causing an excavation to be made shall provide written notice to the owners of adjoining buildings advising them that the excavation is to be made and that the adjoining buildings should be protected. Said notification shall be delivered not less than 10 days prior to the scheduled starting date of the excavation.
Note: Other requirements for protection of adjacent property of adjacent and depth to which protection is requested are defined by California Civil Code Section 832, and is reprinted herein for convenience.
Section 832. Each coterminous owner is entitled to the lateral and subjacent support which his land receives from the adjoining land, subject to the right of the owner of the adjoin-ing land to make proper and usual excavations on the same for purposes of construction or improvement, under the following conditions:
1. Any owner of land or his lessee intending to make or to permit an excavation shall give reasonable notice to the owner or owners of adjoining lands and of buildings or other structures, stating the depth to which such excavation is intended to be made, and when the excavating will begin.
2. In making any excavation, ordinary care and skill shall be used, and reasonable precautions taken to sustain the adjoining land as such, without regard to any building or other structure which may be thereon, and there shall be no liability for damage done to any such building or other structure by reason of the excavation, except as otherwise provided or allowed by law.
3. If at any time it appears that the excavation is to be of a greater depth than are the walls or foundations of any adjoining building or other structure, and is to be so close as to endanger the building or other structure in any way, then the owner of the building or other structure must be allowed at least 30 days, if he so desires, in which to take measures to protect the same from any damage, or in which to extend the foundations thereof, and he must be given for the same purposes reasonable license to enter on the land on which the excavation is to be or is being made.
4. If the excavation is intended to be or is deeper than the standard depth of foundations, which depth is defined to be a depth of nine feet below the adjacent curb level, at the point where the joint property line intersects the curb and if on the land of the coterminous own-er there is any building or other structure the wall or foundation of which goes to standard depth or deeper then the owner of the land on which the excavation is being made shall, if given the necessary license to enter on the adjoining land, protect the said adjoining land and any such building or other structure thereon without cost to the owner thereof, from any damage by reason of the excavation, and shall be liable to the owner of such property for any such damage, excepting only for minor settlement cracks in buildings or other structures.
3311.2 Replace this section and title with the following:
3311.2 Fire Safety During Demolition. All existing dry standpipes shall be maintained in an operative condition and with all inlets and outlets accessible for use within two floors of the highest remaining portion of a floor of the building. The inlets shall be so identified at the street level as to be easily located by the Fire Department. They shall be removed in place with floor removal and the upper ends capped above the highest remaining valve. The remaining system on the lower floors shall continue operative until all construction above the third floor has been removed.