N.Y.C. Admin. Code § BC 3308: Section BC 3308: Unenclosed Perimeter Protection

3308.1 Scope.

Protection shall be provided along unenclosed perimeters as required by this section and rules promulgated by the commissioner, including but not limited to safety netting systems, guardrail systems, cocoon systems, climbing formwork, and enclosure panels. Except where this section authorizes the temporary removal of unenclosed perimeter protection, no work shall occur, nor shall materials be stored on any level where required unenclosed perimeter protection is not installed.

3308.2 Permit.

A permit is required for the installation of unenclosed perimeter protection.

Exceptions: A permit is not required for:

1. Vertical safety netting systems that are in accordance with Sections 3308.5;

2. Horizontal safety netting systems that are in accordance with Section 3308.6; or

3. Guardrail systems that are in accordance with Section 3308.7.

3308.3 Design and documentation of unenclosed perimeter protection.

Unenclosed perimeter protection shall be designed and provided with documentation in accordance with Sections 3308.3.1 through 3308.3.5.

Exception: The requirements of Sections 3308.3.1, and 3308.3.3 through 3308.3.5, shall not apply to guardrail systems. The requirements of Section 3308.7 shall apply to guardrail systems.

3308.3.1 Design.

Unenclosed perimeter protection shall be designed by a registered design professional to meet temporary loads, including but not limited to wind, as prescribed in Chapter 16. The registered design professional shall take the supporting structure into account when designing the installation and shall include details of connections, anchorages, and supports. The minimum loads for vertical net cables required by Section 3308.5.3 need not be added to wind loads in determining the maximum lateral force, but in no event shall the maximum design load for the cables be less than that required by Section 3308.5.3. A reduction in the surface area due to the openings in vertical or horizontal net fabric or partially enclosed perimeter panel is permitted provided that the force at design wind speed is derived from manufacturers' test data or other testing or methods acceptable to the commissioner.

3308.3.2 Site safety plans.

Details of the unenclosed perimeter protection shall also be shown on the site safety plan, where such plan is required by this chapter.

3308.3.3 Make and model.

The make and model of unenclosed perimeter protection, along with the connections and supports, shall be acceptable to the registered design professional responsible for the design of the unenclosed perimeter protection in accordance with Section 3308.3.1. The make and model, along with acceptance of the make and model by such registered design professional, shall be indicated as a note on the drawings, or in the form of a signed, sealed, and dated letter from such registered design professional that is kept with the drawings.

3308.3.4 Flame retardant.

Vertical and horizontal safety netting used for unenclosed perimeter protection shall be flame retardant in accordance with NFPA 701. Documentation of such shall be provided by the manufacturer and shall be noted on the drawings by the registered design professional responsible for the design of the safety netting systems in accordance with Section 3308.3.1, or shall be recorded by such registered design professional in the form of a signed, sealed, and dated letter from such registered design professional, with such letter kept with the drawings.

3308.3.5 Tensile strength.

The tensile strength for the structural net utilized in connection with a horizontal safety netting system shall be noted on the drawings by the registered design professional responsible for the design of the safety netting systems in accordance with Section 3308.3.1, or shall be recorded by such registered design professional in the form of a signed, sealed, and dated letter from such registered design professional, with such letter kept with the drawings. Where required by Section 3308.6.3, the strength shall be confirmed by testing; the results of the test shall be documented in the form of a signed, sealed, and dated letter from the registered design professional responsible for the design of the safety netting systems in accordance with Section 3308.3.1. Such letter shall be kept with the drawings.

3308.4 Responsibility and supervision.

The permit holder for the project, or where a permit is required by Section 3308.2, the holder of such permit, shall be responsible for complying with the requirements of Section 3308. A competent person designated by such responsible permit holder shall supervise the installation, reinstallation, adjustment, maintenance, repair, and temporary or permanent removal of all unenclosed perimeter protection, along with any support, connection, or component. The inspection of unenclosed perimeter protection shall be conducted in accordance with the requirements of Section 3308.9.3.

3308.5 Vertical safety netting systems.

Vertical safety netting shall be installed, maintained, and provided along all unenclosed perimeters.

Exceptions:

1. Vertical safety netting is not required for:

1.1. The story at grade, provided it is less than 6 feet (1829 mm) above the level of the adjoining ground or structure; or

1.2. The working deck; or

1.3. Any story in concrete construction where the formwork has not been stripped, provided such floor is no more than four stories or 40 feet (12 192 mm) below the working deck, whichever is less; or

1.4. Any story in steel construction where the concrete slab has not been placed, provided that no work, other than steel erection or metal deck placement, is occurring on that story.

2. Vertical safety netting is not required at a location where a supported scaffold has been installed provided the scaffold is decked even with the building at such level where the unenclosed perimeter exists, with no gap between the scaffold deck and the building deck greater than 3 inches (76 mm), and also provided that the scaffold is provided with netting and guardrails in accordance with Section 3314.8.

3. Vertical safety netting is not required to protect an unenclosed window opening, provided such window opening is enclosed with a sill not less than 3 feet 6 inches (1067 mm) in height.

4. Vertical safety netting is not required for a building whose final height will be no more than 4 stories or 40 feet (12 192 mm) in height, whichever is less.

5. Vertical safety netting is not required for a minor alteration or ordinary repair.

6. Vertical safety netting is not required at a location where an equivalent alternative system acceptable to the commissioner, including but not limited to cocoon systems, climbing formwork, or enclosure panels, has been installed.

3308.5.1 Openings.

The largest opening area for debris netting when used vertically shall not be larger than 1 square inch (645 mm

2

), with no opening larger than 1 inch (25 mm) in the vertical or horizontal dimensions and 1 1/2 inch (38 mm) in any other dimension.

3308.5.2 Height.

Where required, vertical safety netting shall extend to cover all openings in the unenclosed perimeter to a height of at least 60 inches (1524 mm) above the floor or, where installed at the roof level, the roof.

3308.5.3 Cables.

Vertical safety netting shall be secured to non-corrosive wire cable capable of withstanding a load of at least 200 pounds (90.7kg) applied in any direction except upward. The cables shall be located at a height of 60 inches (1524 mm), 42 inches (1067 mm), 21 inches (533 mm), and 0 inches (0 mm) above the level of the floor or, where installed at the roof level, the roof. Where the vertical safety netting extends above 60 inches (1524 mm) in height, a cable shall also be placed at the top of the netting, with intermediate cables between the 60 inch (1524 mm) cable and the top cable as needed to satisfy the design requirements of Section 3308.3.

Exceptions: In lieu of a cable:

1. At 60 inches (1524 mm) or above, a toprail made of wood, pipe, or structural angle meeting the requirements of Section 3308.7.3.

2. At 42 inches (1067 mm) and 21 inches (533 mm), midrails made of wood, pipe, or structural angle meeting the requirements of Section 3308.7.3.

3. At 0 inches (0 mm), a toeboard meeting the requirements of Sections 3308.7.2 and 3308.7.3, provided the net is secured to the toeboard.

3308.5.3.1 Zero cable.

Zero cables shall be secured to the deck and be maintained in contact with the deck such that debris cannot accumulate nor pass beneath the cable.

3308.5.4 Taut systems.

Where the vertical safety netting relies upon a taut system, the net and cables shall be maintained taut. A positive tensioning system such as a turnbuckle shall be provided to keep the cable taut.

3308.5.5 Friction connections.

Wood installations that utilize a friction connection are not permitted.

3308.5.6 Temporary removal.

The requirements of Section 3308.10 shall apply.

3308.5.6.1 Supplemental requirement for removal of toeboard or zero cable.

The toeboard or zero cable may be temporarily removed to facilitate the placement and curing of a concrete floor slab, provided no other work occurs on such floor, and provided an alternative measure is utilized to secure the bottom of the netting as close to the deck as practical.

3308.5.7 Permanent removal.

Vertical safety netting systems may be removed from floors where the facade has been installed and all such openings in the facade, including for windows, have been permanently enclosed to a height of at least 60 inches (1524 mm) above the floor. Vertical safety netting systems may be removed from the roof where the final parapet or guardrail has been installed.

3308.6 Horizontal safety netting systems.

Horizontal safety netting shall meet the requirements of Sections 3308.6.1 through 3308.6.4.

3308.6.1 Where required.

Horizontal safety netting shall be installed and maintained as follows.

3308.6.1.1 During construction.

When, during the course of new building construction, or during the vertical or horizontal enlargement of an existing building, the topmost walkable floor reaches a height of six stories or 75 feet (22 860 mm), whichever is less, above the level of the ground or an adjoining roof, horizontal safety netting shall be provided at a level not more than two stories or 30 feet (9144 mm), whichever is less, below:

1. In concrete structures: the stripping floor; or

2. In steel structures: at the topmost story where the concrete floor slab has been placed.

Exception: When tarpaulins encase one or more floors immediately below the finished concrete floor in order to maintain temporary heat, the horizontal netting may be located no more than three floors below the finished concrete floor.

3308.6.1.2 During demolition.

When the demolition of the exterior walls or the roof of a building occurs at a height greater than six stories or 75 feet (22 860 mm), whichever is less, horizontal safety netting shall be provided at a level not more than two stories or 30 feet (9144 mm), whichever is less, below the story from which the exterior walls and roof are being removed.

Exception: Demolition of exterior walls only for the purposes of the alteration, maintenance, or repair of a facade shall be in accordance with Section 3308.6.1.3.

3308.6.1.3 During facade alteration, maintenance, or repair.

Where unique hazards associated with the alteration, maintenance, or repair of a facade exist to the public and property, horizontal safety netting shall be provided as required by the commissioner.

3308.6.1.4 Alternative systems.

Alternative systems may be used in lieu of horizontal safety netting in accordance with the requirements of Sections 3308.6.1.4.1 or 3308.6.1.4.2.

3308.6.1.4.1 Supported scaffold alternative.

Horizontal safety netting is not required at a location where a supported scaffold has been installed provided the scaffold is decked even with the building at the level where the horizontal safety net would otherwise be required to be installed and all levels above where the horizontal nets would otherwise be required, with no gap between the scaffold deck and the building deck greater than 3 inches (76 mm), and also provided that the scaffold is provided with netting and guardrails in accordance with Section 3314.8.

3308.6.1.4.2 Other alternative systems.

Horizontal safety netting is not required at a location where an equivalent alternative system acceptable to the commissioner, including but not limited to cocoon systems or climbing formwork, covers the full height of the unenclosed perimeter at and above all levels where horizontal nets are required.

3308.6.1.5 Hoisting area.

Where approved by the commissioner, horizontal safety netting may be omitted in designated crane, derrick, or hoisting areas.

3308.6.1.6 Temporary removal.

The requirements of Section 3308.10 shall apply.

3308.6.1.7 Permanent removal.

Horizontal safety netting systems may be permanently removed as follows:

1. Horizontal safety netting systems installed for the construction of a building in accordance with Section 3308.6.1.1 may be removed after all concrete has been placed at the highest level and all concrete stripping work at the highest level has been completed.

2. Horizontal safety netting systems installed for the demolition of a building in accordance with Section 3308.6.1.2 may be removed after the demolition has progressed to within six stories or 75 feet (22 860 mm), whichever is less, above the ground or adjoining roof level.

3. Horizontal safety netting systems installed for facade work in accordance with Section 3308.6.1.3 may be removed after all facade work above the level of the nets has been completed.

3308.6.2 Horizontal safety netting systems requirements.

Horizontal safety netting systems shall meet the requirements of Sections 5, 6.3, 6.4, 6.5, 6.6, 7, 8, 10.1, 10.4, 10.5, 10.6, 10.7, 11, and 13 of ANSI/ASSP A10.11, as modified as follows.

3308.6.2.1 Personnel net.

Throughout the standard, the term "personnel net" shall be amended to read "structural net."

3308.6.2.2 Should and shall.

Throughout the standard, the term "should" shall be amended to read "shall."

3308.6.2.3 Entanglement.

The phrase, "and to minimize entanglement of the persons head, arms, and legs when arresting the fall," shall be deleted from Section 6.3 of ANSI/ASSP A10.11.

3308.6.2.4 Arresting a fall.

The phrase "when arresting a fall," shall be deleted from Section 6.4 of ANSI/ASSP A10.11.

3308.6.2.5 Size of debris net openings.

Section 6.6 of ANSI/ASSP A10.11 shall be amended by adding a new sentence at the end of the section, as follows, "However, in no case shall the largest opening area for debris netting when used horizontally be larger than one-half square inch (323 mm

2

), with no opening larger than 1/2 inch (13 mm

2

)* in the vertical or horizontal dimensions and 3/4 inch (19 mm) in any other dimension."

3308.6.2.6 Projection of nets.

The phrase, "as to capture falling personnel" in Section 10.6 of ANSI/ASSP A10.11 shall be amended to read "as to capture falling material".

3308.6.2.7 Supports.

The phrase, "or personnel" in Section 10.7 of ANSI/ASSP A10.11 shall be amended to read, "or material."

3308.6.2.8 Inspection.

Section 11.1 of ANSI/ASSP A10.11 shall be deleted in its entirety and replaced with the following, "Horizontal safety netting systems shall be inspected in accordance with Section 3308.9.3."

3308.6.2.9 Dates tested.

The phrase "Dates inspected" in item number 5 of Section 11.4 of ANSI/ASSP A10.11 shall be amended to read "Dates tested".

3308.6.2.10 Moving.

Section 11.4 of ANSI/ASSP A10.11 shall be amended to add a new item number 9, which shall read, "Dates nets were moved to a higher or lower level."

3308.6.2.11 Cleaning.

Section 13.2 of ANSI/ASSP A10.11 shall be deleted and replaced with the following: "Horizontal safety netting shall not be used for storing material. Horizontal netting shall be cleaned, at least daily, to remove any items that fall into the nets."

3308.6.3 Tensile strength test.

The tensile strength of netting mesh and/or twine of a structural net utilized in conjunction with a horizontal safety netting system shall be confirmed by testing in accordance with ASTM D 5034 or ASTM D 5035. The testing criteria shall be developed by the registered design professional who designed the safety netting system in accordance with Section 3308.3. Such testing shall occur prior to the installation of the net at the site for any net that has previously been used, and for any net that has been installed at the site for two years and every two years thereafter. Nets that do not meet the specified tensile strength as required by Section 3308.3.5 shall not be utilized or shall be replaced.

3308.6.4 Identification of nets.

Structural netting shall be identified in accordance with Section 7 of ANSI/ASSP A10.11. Debris netting shall be identified by a letter or other documentation from the manufacturer stating the description and model. The identification for structural netting and debris netting shall be kept at the site until the netting is removed.

3308.7 Guardrail system.

A guardrail system shall be installed, maintained, and provided along all unenclosed perimeters.

Exceptions: A guardrail system is not required at:

1. The story at grade, provided that it is less than 6 feet (1829 mm) above the level of the adjoining ground or structure.

2. Locations where vertical safety netting is installed in accordance with Section 3308.5.

3. Locations where a supported scaffold has been installed provided the scaffold is decked even with the building at such level where the unenclosed perimeter exists, with no gap between the scaffold deck and the building deck greater than 3 inches (76 mm), and also provided that the scaffold is provided with netting and guardrails in accordance with Section 3314.8.

4. Locations where an equivalent alternative system acceptable to the commissioner, including but not limited to cocoon systems, climbing formwork, or enclosure panels, has been installed.

3308.7.1 Components.

Guardrail systems shall include a toprail, midrail, toeboard, and posts.

3308.7.2 Height of railings and toeboard.

Toprails, midrails, and toeboards shall be located as follows:

1. The top of the toprail shall be located at a height of 39 to 45 inches (991 and 1143 mm) above the floor.

2. The midrail shall be located at a height approximately midway between the toprail and the floor, or where more than one midrail is utilized, each shall be located equidistant from each other, the floor, and the toprail.

3. The toeboard shall be at least 3 1/2 inches (89 mm) high and shall be installed so that there is not more than a 1/4 inch (6 mm) gap between the floor and the bottom of the toeboard.

Exception: When conditions warrant, the height of the toprail may exceed the 45-inch (1143 mm) height provided additional midrails are installed so that there is no vertical gap larger than 24 inches (610 mm) between any toeboard, midrail, or toprail.

3308.7.3 Dimensions and materials.

Toprails, midrails, toeboards, and posts shall have the following dimensions and be constructed out of the following materials:

1. Toprails shall, at a minimum, consist of:

1.1. 2 inch by 4 inch (51 mm by 102 mm) 1,500 foot pounds per square inch (1.05 kgf/mm

2

) fiber (stress grade) construction grade lumber;

1.2. 1 1/2 inch (38 mm) nominal diameter (Schedule 40) pipe;

1.3. 2 inch by 2 inch by 3/8 inch (51 mm by 51 mm by 10 mm) structural angle; or

1.4. 1/4 inch (6 mm) diameter noncorrosive wire cable made of mild plow steel.

2. Midrails shall, at a minimum, consist of:

2.1. 1 inch by 6 inch (25 mm by 152 mm) 1,500 foot pounds per square inch (1.05 kgf/mm

2

) fiber (stress grade) construction grade lumber;

2.2. 1 1/2 inch (38 mm) nominal diameter (Schedule 40) pipe;

2.3. 2 inch by 2 inch by 3/8 inch (51 mm by 51 mm by 10 mm) structural angle; or

2.4. 1/4 inch (6 mm) diameter non-corrosive wire cable made of mild plow steel.

3. Toeboards shall, at a minimum, consist of:

3.1. 1 inch by 4 inch (25 mm by 102 mm) lumber; or

3.2. Metal plank at least 3 1/2 inches (89 mm) high.

4. Toprails, midrails, and toeboards shall be securely fastened to upright posts spaced not more than 8 feet (2438 mm) apart. Such posts shall, at a minimum, consist of:

4.1. 2 inch by 4 inch (51 mm by 102 mm) 1,500 foot pounds per square inch (1.05 kgf/mm

2

) fiber (stress grade) construction grade lumber;

4.2. 1 1/2 inch (38 mm) nominal diameter (Schedule 40) pipe;

4.3. 2 inch by 2 inch by 3/8 inch (51 mm by 51 mm by 10 mm) structural angle; or

4.4. A building column.

Exceptions:

1. Guardrail systems designed by a registered design professional capable of withstanding, without failure:

1.1. A force of at least 200 pounds (890 N) applied within 2 inches (51 mm) of the top edge, in any outward or downward direction, at any point along the top edge. Where the force is applied in a downward direction, the top edge shall not deflect more than 6 inches (152 mm) and in no case to a height less than 39 inches (991 mm) above the floor; and

1.2. A load of at least 50 pounds (222 N) applied in any downward or horizontal direction at any point along the toeboard.

2. Posts supporting wire cable toprails and midrails, as well as the toeboards utilized in connection with such wire cable toprails and midrails, may be spaced more than 8 feet (2438 mm) apart provided that the posts are spaced such that where a force of 200 pounds (890 N) is applied in a downward direction along the top edge, the top edge shall not deflect more than 6 inches (152 mm) and in no case to a height less than 39 inches (991 mm) above the floor.

3308.7.4 Horizontal gap.

The guardrail system shall be installed so that there exists no horizontal gap larger than 1 inch (25 mm) as measured along the perimeter of the building from the edge of the guardrail system to any building column or facade.

3308.7.5 Tensioning system.

When made of wire cable, toprails and midrails shall be provided with a positive tensioning system, such as a turnbuckle, to keep the cable taught.

3308.7.6 Dislodgement.

Guardrail systems shall be secured to prevent dislodgement by impact or wind.

3308.7.7 Temporary removal.

The requirements of Section 3308.10 shall apply.

3308.7.8 Permanent removal.

Guardrail systems installed to protect unenclosed perimeters may be removed where vertical safety netting systems meeting the requirements of Section 3308.5 have been installed.

3308.8 Modifications.

The commissioner may, based upon a written request from a registered design professional, modify the requirements for unenclosed perimeter protection in accordance with Section 28-103.3 of the Administrative Code.

3308.9 Unenclosed perimeter protection inspection, use, adjustment, maintenance, and repair.

Unenclosed perimeter protection shall be inspected, used, adjusted, maintained, repaired, and replaced in accordance with the design drawings, manufacturer specifications, and the requirements of this code. Where there is a discrepancy, the stricter standard shall apply.

3308.9.1 Safe condition.

Unenclosed perimeter protection shall be maintained in a safe condition and used in a manner that eliminates hazards to the public and property. Any hazardous conditions or defects discovered with such shall immediately be brought to the attention of the responsible permit holder under Section 3308.4.

3308.9.2 Precautions.

Precautions shall be taken to prevent unenclosed perimeter protection from being damaged by sunlight, abrasion, sand, rust, welding, cutting operations, chemicals, and airborne contaminants, where such systems are susceptible to damage by such.

3308.9.3 Inspections.

Unenclosed perimeter protection shall be inspected for compliance with this code, manufacturer specifications, and required drawings at least daily, as well as before and after each removal and restoration in accordance with Section 3308.10.3, and after each impact loading event, installation, reinstallation, adjustment, maintenance, or repair of the unenclosed perimeter protection or any part or component of such. Where the job requires a site safety manager or coordinator in accordance with Section 3310, the inspection shall be performed by the site safety manager or coordinator, and a written record of such inspection maintained as part of the site safety log. Where the job does not require a site safety manager or coordinator, the inspection shall be performed by a competent person designated by the permit holder in accordance with Section 3308.4, with a record of such inspection prepared, initialed, and dated by such competent person.

3308.9.4 Removing from service.

Unenclosed perimeter protection showing signs of mildew, corrosion, wear, tears, breaks, frays, damage, or deterioration that may substantially affect the strength of such shall be immediately removed from service.

3308.9.5 Repair.

Repairs to unenclosed perimeter protection shall be in accordance with the specifications of the manufacturer of such and shall provide the original manufacturer factor of safety, or where manufacturer specifications do not exist, shall be repaired in accordance with specifications developed by the registered design professional responsible for the design of the unenclosed perimeter protection in accordance with Section 3308.3.1.

Exception: Structural nets and debris nets shall not be repaired.

3308.9.6 Vacuum cleaning.

Areas in the vicinity of operations related to the installation, reinstallation, adjustment, maintenance, repair, temporary removal, or permanent removal of unenclosed perimeter protection systems that produce or typically produce small debris shall be vacuumed as the operation progresses. Examples of operations that produce small debris include, but are not limited to, the installation or removal of fasteners for a vertical netting system, chipping to expose curtain wall clips, preparation of the slab to install or receive exterior walls, and chopping or core drilling at perimeter for mechanical risers. Vacuum equipment shall be tethered or otherwise secured to prevent the equipment from falling.

3308.10 Temporary removal of unenclosed perimeter protection.

Unenclosed perimeter protection, or portions thereof, may be temporarily removed in the immediate area where active loading or unloading operations are occurring, or to the extent necessary to facilitate active work at the perimeter, including but not limited to inspections or the relocation of unenclosed perimeter protection to a higher level, provided there is compliance with the following items:

1. All material, equipment, and debris on the floor is secured against dislodgement by wind or accidental impact;

2. A controlled access zone is established to prevent unauthorized personnel from entering the area where the unenclosed perimeter protection has been removed;

3. Prior to removal the floor is cleared of all material, equipment, and debris to a distance of at least 10 feet (3048 mm) in all directions from the area where the unenclosed perimeter protection is to be removed, except for material or equipment that is related to the active loading or unloading operation or active work at the perimeter, or that is stored in accordance with Section 3303.4.5.2;

4. Immediately prior to removal the floor is broom-swept to a distance of at least 10 feet (3048 mm) in all directions from the area where the unenclosed perimeter protection is to be removed and, in addition, areas in the immediate vicinity of the unenclosed perimeter protection are vacuumed, including areas around zero cables, toeboards, and spaces where trapped debris may have accumulated;

5. During removal operations areas are vacuumed as required by Section 3308.9.6;

6. A competent person supervises the operation as required by Section 3308.10.2;

7. Where vertical safety netting, guardrails, or equivalent alternative systems are removed, the removal does not extend past the column bays where the active loading or unloading operations are occurring or where active work at the perimeter is occurring; and

8. Where horizontal safety netting or equivalent alternative systems are removed, none of the following types of work occurs at or above the level where the horizontal safety netting or equivalent alternative system has been removed:

8.1. Concrete work, including formwork placement or stripping;

8.2. Structural steel placement or assembly; or

8.3. Any other work within 10 feet (3048 mm) from an unenclosed perimeter of the building.

3308.10.1 Restoring unenclosed perimeter protection.

Unenclosed perimeter protection shall be reinstalled immediately following the end of the active loading or unloading operation or active work at the perimeter, or at the end of the shift, whichever occurs sooner. Immediately prior to restoring a guardrail system, vertical netting system, or equivalent alternative system, areas in the vicinity of the edge shall be vacuumed, and other areas to a distance of at least 10 feet (3048 mm), in all directions from the area where the unenclosed perimeter protection is removed, shall be broom-swept. Vacuum equipment shall be tethered or otherwise secured to prevent the equipment from falling.

Exceptions:

1. Where material overhangs overnight in accordance with Section 3303.4.5.2, guardrails shall be reinstalled the next work day immediately following the relocation of the material.

2. Where a toeboard or zero cable has been temporarily removed to facilitate the placement and curing of a concrete floor slab, the toeboard or zero cable shall be reinstalled as soon as practical.

3308.10.2 Competent person.

The competent person designated in accordance with Section 3308.4 shall supervise the temporary removal and reinstallation of unenclosed perimeter protection, including all ancillary activities, such as preparing the area for the removal of the unenclosed perimeter protection, and shall ensure compliance with the requirements of Section 3308.10.

3308.10.3 Inspection.

An inspection shall be performed immediately prior to the removal of unenclosed perimeter protection to verify compliance with the provisions of Section 3308.10. An inspection shall be performed immediately prior to restoring a guardrail system, vertical netting system, or equivalent alternative system to verify compliance with the cleaning provisions of Section 3308.10.1. An inspection shall be performed immediately after unenclosed perimeter protection is restored to verify compliance with this code, manufacturer specifications, and required drawings. These inspections shall be performed by the site safety manager, site safety coordinator, or competent person in accordance with Section 3308.9.3, and recorded in accordance with Section 3308.9.3.