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Demolition shall be conducted in accordance with the requirements of Sections 3306.9.1 through 3306.9.16.
3306.9.1 Utilities and Service Lines
The requirements of Section 3303.2 shall apply.
3306.9.2 Party Wall Exits, Fire Exits
The requirements of Section 3303.9 shall apply.
3306.9.3 Dust
Dust producing operations shall be wetted down to the extent necessary to control the dust.
3306.9.4 Water Accumulation
The requirements of Section 3303.14 shall apply.
3306.9.5 Temporary Elevators and Standpipe Systems
The requirements of Sections 3303.8 and 3303.12 shall apply.
3306.9.6 Sprinkler Systems
The requirements of Section 3303.7.4 shall apply.
3306.9.7 Use of Explosives
The use of explosives in demolition operations shall conform to the requirements and limitations imposed by the New York City Fire Code and Section 3312.
3306.9.8 Hazards to Be Removed
Prior to the commencement of demolition operations, hazards shall be removed in accordance with Sections 3306.9.8.1 through 3306.9.8.4.
3306.9.8.1 Combustible Content
Prior to the commencement of demolition operations, the area authorized to be demolished by the work permit shall be thoroughly cleaned of combustible content and debris, including but not limited to building contents and exterior finishes, down to the structural elements.
3306.9.8.2 Asbestos
Prior to the commencement of demolition operations, all asbestos shall be removed from the area authorized to be demolished by the department work permit, and certification to that effect shall be filed with the department and the Department of Environmental Protection. Such asbestos removal shall be in accordance with Section 28-106 of the Administrative Code and rules promulgated by the commissioner of the Department of Environmental Protection.
3306.9.8.3 Glass
Prior to the commencement of demolition operations, all glass located in the area authorized to be demolished by the work permit, including but not limited to glass in windows, doors, skylights, and fixtures, shall be removed.

Exception: Demolition operations relating to the alteration, maintenance, or repair of a façade.
3306.9.8.4 Steam and Fuel
Prior to the commencement of demolition operations, all pipes, tanks, boilers, or similar devices containing steam or fuel and located in the area authorized to be demolished by the work permit shall be purged of such steam or fuel.

Exception: Pipes, tanks, boilers, or similar devices containing steam or fuel located in the area authorized to be demolished by the work permit and which will not be disturbed during the course of the demolition operation may, in lieu of being purged, be safeguarded so as to prevent their being damaged during the course of demolition operations.
3306.9.9 Stairs
All enclosed vertical shafts and stairs shall be maintained enclosed at all floors except the topmost floor being demolished, and all work on the topmost floor shall be completed before stair and shaft enclosures on the floor below are disturbed. All hand rails and banisters shall be left in place until actual demolition of such floor is in progress.
3306.9.10 Floors
The safeguards of Sections 3306.9.10.1 through 3306.9.10.3 shall apply to demolition operations involving floors.
3306.9.10.1 Bearing Partitions and Headers
No bearing partition shall be removed from any floor until the floor framing system on the floor above has been removed and lowered. All header beams and headers at stair openings and chimneys shall be carefully examined and, where required, shall be shored from the cellar floor through successive floors. All operations shall be continually monitored by a qualified person designated by the permit holder as the work progresses to detect any hazards that may develop.
3306.9.10.2 Floor Openings Not to Aggregate More Than 25 Percent of the Gross Floor Area
Openings in any floor shall not aggregate more than 25 percent of the area of that floor unless it can be shown by submission from a registered design professional to the satisfaction of the commissioner that larger openings will not impair the stability of the structure.
3306.9.10.3 Covering of Floor Openings
Floor openings used for the removal of debris shall comply with Section 3306.9.12.1. Every opening not used for the removal of debris in any floor shall be clearly marked and solidly planked over by planking not less than 2 inches (51 mm) in thickness, or equivalent solid material, laid close.
3306.9.11 Storage of Material
Material shall not be stored on catch platforms, working platforms, floors, or stairways of any structure, except that any one floor of a building to be demolished may be used for the temporary storage of material when such floor can be evaluated by a registered design professional and proven to be of adequate strength to support one and one-half times the load to be superimposed. Such evaluation by the registered design professional shall be maintained by the permit holder and made available to the department upon request.
3306.9.11.1 Avoid Interference
Storage spaces shall not interfere with access to any stairway or passageway, and suitable barricades shall be provided so as to prevent material from sliding or rebounding into any space accessible to the public. All material shall be safely stored or piled in such storage locations in a manner that will not overload any part of the structure or create any hazard.
3306.9.11.2 Examination of Connections
Before any material is stored on any floor, the existing flooring adjacent to bearing walls, shear walls, beams and columns shall be removed and the connections of the floor framing system to the bearing walls, shear walls, beams and columns shall be carefully examined by a competent person designated by the permit holder to ascertain their condition and adequacy to support such material. If the connections are found to be in poor condition or inadequate to support the stored material, no material shall be deposited on the floor until these connections are shored from the cellar floor through each successive floor or otherwise strengthened to safely support such material.
3306.9.11.3 Removal of Floor Slabs for Storage
In buildings of noncombustible construction, floor slabs to an elevation of not more than 25 feet (7620 mm) above the legally established curb level may be removed to provide temporary storage for debris, provided that:
  1. The stored debris is piled with sufficient uniformity to prevent lateral displacement of interior walls or columns as determined by a registered design professional.
  2. The height of the piled material will not burst the exterior walls due to horizontal loading as determined by a registered design professional.
  3. The operation does not otherwise endanger the stability of the structure.
3306.9.11.4 Cellar or Basement Storage
Debris stored in the cellar or basement shall not be piled above the level of the adjacent exterior grade unless the demolition contractor provides sheet-piling, shoring, bracing, or such other means necessary to insure the stability of the walls and to prevent any wall from collapsing due to horizontal loading created by the debris as determined by a registered design professional. Where debris is stored against a party wall, the requirements of Section 3306.9.11.5 shall also apply.
3306.9.11.5 Examination of Party Walls
Party walls shall be carefully examined by a competent person designated by the permit holder to ascertain the condition and adequacy of the party wall prior to the placement of any material that will impose a load upon such party wall. If the party wall is to be found to be in poor condition or inadequate to support the stored material, no material shall be deposited on the floor until the party wall is shored or otherwise strengthened as determined by a registered design professional to safely support such material.
3306.9.12 Removal of Material
Debris, bricks, and similar material shall be removed through openings in the floors of the structure, or by means of chutes, buckets, or hoists that comply with the provisions of this chapter.
3306.9.12.1 Floor Openings Used for the Removal of Debris
Every opening in a floor used for the removal of debris shall be tightly enclosed with a shaftway, extending from floor to floor, with such shaftway enclosed with:
  1. Planking not less than 2 inches (51 mm) in thickness, or equivalent solid material; or
  2. Where the opening is used for the removal of noncombustible material, wire mesh may be utilized in lieu of planking, provided such mesh is not less than number 18 gauge wire mesh, with openings in the wire no longer than 1/2 inch (13 mm), and also provided that the wire mesh is securely attached, in accordance with drawings developed by a registered design professional, to the shaftway so that the wire mesh enclosure in any location does not deflect more than 2 inches (51 mm) when a force of at least 200 pounds (890 n) is applied along any horizontal portion of such wire mesh enclosure.
    Exceptions:
    1. In buildings not more than six stories or 75 feet (22 860 mm) in height, whichever is less, a shaftway is not required. Instead openings in the floor shall be clearly marked and solidly planked over while not in use by planking not less than 2 inches (51 mm) in thickness, or equivalent solid material, and laid close.
    2. A shaftway is not required at the working deck. Instead, openings in the working deck shall be clearly marked and solidly planked over while not in use by planking not less than 2 inches (51 mm) in thickness, or equivalent solid material, laid close.
3306.9.12.1.1 Temporary Removal of Protection
Wherever a shaftway or planking required by Section 3306.9.12.1 has been temporarily removed to permit debris removal, the floor opening shall be protected by a guardrail system that meets the requirements of Sections 3308.7.1 through 3308.7.5. Such protection required by Section 3306.9.12.1 shall be promptly replaced in position upon the ceasing of such work at the end of each workday.
3306.9.12.2 Protection of Wall Openings
In any buildings more than 25 feet high (7620 mm), any window or other exterior wall opening that is within 20 feet (6096 mm) of a floor opening used for the passage of debris from levels above shall be solidly boarded up or otherwise substantially covered, unless such window or opening is so located as to preclude the possibility of any person being injured by material that may fall from such window or opening.
3306.9.12.3 Chutes
Chutes used in association with the removal of materials shall comply with Section 3303.5.5.
3306.9.13 Rodent Extermination
A licensed exterminator shall effectively treat the premises for rodent extermination as per the requirements of the Department of Health and Mental Hygiene.
Exception: Partial demolition operations.
3306.9.14 Chimneys
Where brick or masonry chimneys cannot be safely toppled or dropped, all materials shall be dropped down on the inside of such chimneys.
3306.9.15 Partitions
Partitions required for the stability of the structure or required for egress, as identified in the submittal documents required by Section 3306.5, shall be clearly marked prior to the commencement of demolition operations. Such partitions shall not be removed until a competent person designated by the permit holder has determined the demolition sequence, as identified in the submittal documents, has reached the point the partitions can be safely removed, and authorizes their removal.
3306.9.16 Temporary Weather Protection
Temporary weather protection shall be installed and maintained by the demolition contractor, as necessary, to protect building systems or elements that may be susceptible to exposure to the weather during periods where the permanent weather protection has been breached, diminished, or is not yet in place. Such building systems or elements include, but are not limited to, walls, party walls, roofs, areas of missing brick, loose lain brick, and exposed electrical conduit.

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