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3308.1 Safety Netting During Construction or Demolition Operations
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Horizontal and vertical safety netting shall be provided when required below. Safety netting is required in addition to the sidewalk sheds, fences, and other pedestrian protection required by Section 3307.
When exterior walls are being constructed, altered or repaired at a height greater than 6 stories or 75 feet (22 860 mm), horizontal safety netting shall be provided on the sides of the structure where the structure is not enclosed. A structure shall be considered to be enclosed when the permanent facade is completed except for the windows. Such windows shall be protected to a height specified in Section 3308.3 unless there is a sill not less than 2 feet 6 inches (762 mm) in height and vertical mullions or piers with a maximum opening of 5 feet (1524 mm) and a non-corrosive wire cable capable of withstanding a load of at least 200 pounds (90.7 kg) applied in any direction except upward.
When during the course of construction the building reaches a height of 6 stories or 75 feet (22 860 mm), horizontal safety netting shall be maintained at a level not more than two stories or 30 feet (9144 mm) below the stripping operation on concrete structures or the uppermost finished (and walkable) concrete floor on steel frame structures. The horizontal safety netting may be removed after the formwork for the topmost level of concrete is removed or after the topmost level of concrete for a steel building is poured.
When demolition of the exterior walls or the roof of a structure occurs at a height greater than 6 stories or 75 feet (22 860 mm), horizontal safety netting shall be provided. The horizontal safety netting shall be constructed and maintained not more than two stories or 30 feet (9144 mm) below the story from which the exterior walls and roof are being removed until the demolition has progressed to within six stories or 75 feet (22 860 mm) off the ground or adjoining roof level