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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.
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