WORK SITE SAFETY AND OPERATIONS

Municipal Code of Chicago tit. 14B, ch. 14B-33

in effect

Municipal Code of Chicago § 14B-33-3301 General.

14B-33-3301 General. The provisions of Section 3301 of IBC are adopted by reference with the following modifications: 1. Revise Section 3301.1 to read: "3301.1 Scope. The provisions of this chapter shall govern safety during construction, demolition and rehabilitation work and the protection of adjacent public and private properties. Provisions of this chapter pertaining to dust control shall be enforced by the Chief Sustainability Officer in accordance with Chapter 11-4 of the Municipal Code." 2. Add a new Section 3301.3 to read: "3301.3 Delivery and removal. Delivery and removal of equipment and materials from the construction site shall be done in a manner that prevents injury or damage to persons, adjoining properties and the public way." 3. Add a new Section 3301.4 to read: "3301.4 Reuse and reprocessing of construction and demolition site material. Surplus materials and debris resulting from construction and demolition activities shall be reused or reprocessed in accordance with Article XIV of Chapter 11-4 of the Municipal Code." (Amend Coun. J. 2-19-20, p. 14473, Art. II, § 99; Amend Coun. J. 6-25-21, p. 32180, Art. II, § 27; Amend Coun. J. 12-20-25, p. 39283, Art. III, § 8)

Municipal Code of Chicago § 14B-33-3302 Construction safeguards.

14B-33-3302 Construction safeguards. The provisions of Section 3302 of IBC are adopted by reference with the following modifications: 1. Revise Section 3302.1, excluding the exceptions, to read: "3302.1 Alterations, repairs and additions. Required means of egress components, existing structural elements, fire protection devices and sanitary safeguards shall be maintained at all times during alterations, repairs or additions to any building or structure." 2. Delete Section 3302.2. 3. Delete Section 3302.3. 4. Add a new Section 3302.4 to read: "3302.4 Construction loads. Provisions shall be made to ensure that stresses due to wind loads, dead loads and loads due to material storage and construction equipment imposed during the construction, alteration, repair, addition to or demolition of any structure shall not exceed the allowable stresses for materials as limited by the provisions of this code." 5. Add a new Section 3302.5 to read: "3302.5 Protection of openings. All stairways, elevator shafts, flues, and other vertical openings in the floors and roof shall be covered or properly protected."

Municipal Code of Chicago § 14B-33-3303 Demolition.

14B-33-3303 Demolition. The provisions of Section 3303 of IBC are adopted by reference with the following modifications: 1. Revise Section 3303.1 to read: "3303.1 Procedure. Demolition of any building or structure shall begin at the top thereof, and each story shall be completely razed or demolished and the material therefrom completely removed before demolition work begins on the next lower story, unless an alternative procedure is approved by the building official." 2. Revise Section 3303.3 to read: "3303.3 Means of egress. A horizontal exit shall not be destroyed unless and until a substitute means of egress has been provided." 3. Revise Section 3303.4 to read: "3303.4 Filling and grading. Where a structure has been demolished or removed, the vacant lot shall be filled, where necessary, with clean soil, cinders, or other inorganic material and graded to a level not lower than and not more than 12 inches (305 mm) above the level of sidewalks, alleys, or adjoining property, with proper allowance for settlement." 4. Revise Section 3303.6 to read: "3303.6 Utility connections. Service utility connections shall be discontinued and capped in accordance with the rules and requirements of the utility provider." 5. Revise Section 3303.7 to read: "3303.7 Fire safety during demolition. Fire safety during demolition shall comply with the applicable requirements of this chapter." 6. Add a new Section 3303.8 to read: "3303.8 Debris removal. Debris from the demolition of a building or structure shall be removed from the site as demolition progresses. Salvaged material, if left on the site, shall be neatly stored."

Municipal Code of Chicago § 14B-33-3304 Site work.

14B-33-3304 Site work. The provisions of Section 3304 of IBC are adopted by reference with the following modifications: 1. Add a new Section 3304.2 to read: "3304.2 Drainage across property lines. Drainage across property lines shall not exceed that which existed prior to site work. Excess or concentrated drainage shall be contained on site or directed to a permitted drainage facility. Erosion of the ground in the area of discharge shall be prevented by installation of nonerosive down drains or similar devices." 2. Add a new Section 3304.3 to read: "3304.3 Fencing of excavation work. Where excavation work to any depth will occur within 5 feet (1524 mm) of a walkway on public or private property, temporary fencing, not less than 4 feet (1219 mm) in height shall be erected around the area of excavation. Such fencing shall be adequately supported to prevent it from collapsing due to wind. Where the depth of excavation work exceeds 30 inches (762 mm), the fencing shall meet the requirements for guards in Chapters 10 and 16. No person shall remove or open a required fence except to allow necessary delivery and removal of materials, tools and equipment or passage of workers, inspectors or other persons whose presence is required at the site."

Municipal Code of Chicago § 14B-33-3305 Sanitary.

14B-33-3305 Sanitary. The provisions of Section 3305 of IBC are adopted by reference with the following modification: 1. Revise Section 3305.1 to read: "3305.1 Facilities required. Adequate sanitary facilities for workers shall be provided during construction, rehabilitation or demolition activities in accordance with the Chicago Plumbing Code."

Municipal Code of Chicago § 14B-33-3306 Protection of pedestrians.

14B-33-3306 Protection of pedestrians. The provisions of Section 3306 of IBC are adopted by reference with the following modifications: 1. Revise Section 3306.1 to read: "3306.1 Protection required. Pedestrians shall be protected during construction, rehabilitation and demolition activities as required by this chapter and Article V-A of Chapter 10-28 of the Municipal Code." 2. Delete Table 3306.1. 3. Delete Sections 3306.3 through 3306.9. 4. Add a new Section 3306.10 to read: "3306.10 Loads on pedestrian protection structures. No additional structures, including field offices, construction equipment, materials, signs, displays, ornamentation or similar loads shall be erected or placed upon a construction canopy or similar pedestrian protection structure until plans identifying these loads are submitted to the building official and a permit is issued, authorizing the construction activity or loading."

Municipal Code of Chicago § 14B-33-3307 Protection of adjoining property.

14B-33-3307 Protection of adjoining property. The provisions of Section 3307 of IBC are adopted by reference with the following modifications: 1. Delete the last two sentences of Section 3307.1. 2. Add a new Section 3307.2 to read: "3307.2 Additional requirements. Excavation work on private property shall comply with Section 406 of the Chicago Construction Codes Administrative Provisions."

Municipal Code of Chicago § 14B-33-3308 Temporary use of streets, alleys and public property.

14B-33-3308 Temporary use of streets, alleys and public property. The provisions of Section 3308 of IBC are adopted by reference with the following modifications: 1. Revise Section 3308.1 to read: "3308.1 General. The temporary use of streets or public property for the storage or handling of materials or of equipment required for construction or demolition, and the protection provided to the public shall comply with Chapter 10-28 of the Municipal Code." 2. Delete Sections 3308.1.1 and 3308.2. 3. Insert new Sections 3308.3 and 3308.4 to read: "3308.3 Debris. Debris shall not be allowed to accumulate in the public way in violation of Section 7-28-395 of the Municipal Code. 3308.4 Damage. Costs and expenses incurred by the City to repair damage to the public way or city sewer system caused by construction, demolition or rehabilitation work on adjacent private property shall be reimbursed in accordance with Section 7-28-395 of the Municipal Code." (Amend Coun. J. 10-7-20, p. 21791, Art. II, § 33)

Municipal Code of Chicago § 14B-33-3309 Fire extinguishers.

14B-33-3309 Fire extinguishers. The provisions of Section 3309 of IBC are adopted by reference with the following modification: 1. Revise the first sentence of Section 3309.1 to read: "Structures under construction, alteration or demolition shall be provided with not fewer than one portable fire extinguisher in accordance with Section 906 and sized for not less than ordinary hazard as follows:"

Municipal Code of Chicago § 14B-33-3310 Means of egress.

14B-33-3310 Means of egress. The provisions of Section 3310 of IBC are adopted by reference with the following modification: 1. Add a new Section 3310.3 to read: "3310.3 Floor required. In buildings where construction of the superstructure precedes construction of the permanent floor, a substantial temporary floor shall be constructed at a level not more than two floors below the highest level where work is being performed."

Municipal Code of Chicago § 14B-33-3311 Standpipes.

14B-33-3311 Standpipes. The provisions of Section 3311 of IBC are adopted by reference without modification.

Municipal Code of Chicago § 14B-33-3312 Automatic sprinkler system.

14B-33-3312 Automatic sprinkler system. The provisions of Section 3312 of IBC are adopted by reference with the following modification: 1. Revise Section 3312.1 to read: "3312.1 Completion before occupancy. In buildings where an automatic sprinkler system is required by this code, it shall be unlawful to occupy any portion of a building or structure until the automatic sprinkler system installation has been tested and accepted by the fire code official, except as provided in Chapter 7 of the Chicago Construction Codes Administrative Provisions.

Municipal Code of Chicago § 14B-33-3313 Fire pump.

14B-33-3313 Fire pump. The provisions of Section 3313 of IBC are not adopted. The following language is adopted as Section 3313: “3313. FIRE PUMP 3313.1 General. When the height of the building reaches 300 feet (91.4 m), fire pumps shall be installed and in service for the standpipe risers required by Section 3311. The fire pumps may be part of the permanent installation or may be an independent temporary system.” (Amend Coun. J. 6-17-26, p. 45214, Art. IV, § 37)

Municipal Code of Chicago § 14B-33-3314 Owner’s responsibility for fire protection.

14B-33-3314 Owner’s responsibility for fire protection. The provisions of Section 3314 of IBC are not adopted. The following language is adopted as Section 3314: "3314. OWNER’S RESPONSIBILITY FOR FIRE PROTECTION 3314.1 Program development and maintenance. The owner or owner’s authorized agent shall be responsible for the development, implementation and maintenance of a written plan establishing a fire prevention program at the project site applicable throughout all phases of the construction, repair, alteration or demolition work. The plan shall address the requirements of this chapter and other applicable portions of this code, the duties of staff, and staff training requirements. The plan shall be made available for review by the building official or fire code official upon request. 3314.2 Program superintendent. The owner shall designate a person to be the fire prevention program superintendent who shall be responsible for the fire prevention program and ensure that it is carried out through completion of the project. The fire prevention program superintendent shall have the authority to enforce the provisions of this chapter and other provisions as necessary to secure the intent of this chapter. Where guard service is provided in accordance with NFPA 241, the superintendent shall be responsible for the guard service. 3314.3 Prefire plans. The fire prevention program superintendent shall develop and maintain a prefire plan in cooperation with the fire code official. The fire code official shall be notified of changes affecting the utilization of information contained in such prefire plans. 3314.4 Training. Training of responsible personnel in the use of fire protection equipment shall be the responsibility of the fire prevention program superintendent. Records of training shall be kept and made a part of the written plan for the fire prevention program. 3314.5 Fire protection devices. The fire prevention program superintendent shall determine that all fire protection equipment is maintained and serviced in accordance with this code. Fire protection equipment shall be inspected in accordance with the fire protection program. 3314.6 Hot work operations. The fire prevention program superintendent shall be responsible for supervising the permit system for hot work operations in accordance with the Chicago Fire Prevention Code. 3314.7 Impairment of fire protection systems. Impairments to any fire protection system in an existing building shall be in accordance with the Chicago Fire Prevention Code. 3314.7.1 Smoke detectors and smoke alarms. Smoke detectors and smoke alarms located in an area where airborne construction dust is expected shall be covered to prevent exposure to dust or shall be temporarily removed. Smoke detectors and alarms that were removed shall be replaced upon conclusion of dust-producing work. Smoke detectors and smoke alarms that were covered shall be inspected and cleaned, as necessary, upon conclusion of dust-producing work. 3314.8 Temporary covering of fire protection devices. Coverings placed on or over fire protection devices to protect them from damage during construction processes shall be immediately removed upon the completion of the construction processes in the room or area in which the devices are installed."

Municipal Code of Chicago § 14B-33-3315 Temporary heating equipment.

14B-33-3315 Temporary heating equipment. The following language is adopted as a new Section 3315: "3315. TEMPORARY HEATING EQUIPMENT 3315.1 Listed. Temporary heating devices shall be listed and labeled. The installation, maintenance and use of temporary heating devices shall be in accordance with the listing and the manufacturer’s instructions. 3315.2 Oil-fired heaters. Oil-fired heaters shall comply with the Chicago Fire Prevention Code. 3315.3 LP-gas heaters. Fuel supplies for liquefied-petroleum gas-fired heaters shall comply with the Chicago Fire Prevention Code and Chicago Fuel Gas Code. 3315.4 Refueling. Refueling operations for liquid-fueled equipment or appliances shall be conducted in accordance with the Chicago Fire Prevention Code. The equipment or appliance shall be allowed to cool prior to refueling. 3315.5 Installation. Clearance to combustibles from temporary heating devices shall be maintained in accordance with the labeled equipment. When in operation, temporary heating devices shall be fixed in place and protected from damage, dislodgement or overturning in accordance with the manufacturer’s instructions. 3315.6 Supervision. The use of temporary heating devices shall be supervised and maintained only by competent personnel."

Municipal Code of Chicago § 14B-33-3316 Precautions against fire.

14B-33-3316 Precautions against fire. The following language is adopted as a new Section 3316: "3316. PRECAUTIONS AGAINST FIRE 3316.1 Smoking. Smoking shall be prohibited except in designated areas. "No smoking" signs shall be posted in conspicuous locations. In designated areas where smoking is permitted, noncombustible ashtrays shall be provided. 3316.2 Combustible debris, rubbish and waste. Combustible debris, rubbish and waste material shall comply with the requirements of Sections 3316.2.1 through 3316.2.4. 3316.2.1 Combustible waste material accumulation. Combustible debris, rubbish and waste material shall not be accumulated within buildings. 3316.2.2 Combustible waste material removal. Combustible debris, rubbish and waste material shall be removed from buildings at the end of each shift of work. 3316.2.3 Rubbish containers. Where rubbish containers with a capacity exceeding 5.33 cubic feet (40 gallons) (0.15 m 3) are used for temporary storage of combustible debris, rubbish and waste material, they shall have tight-fitting or self- closing lids. Such rubbish containers shall be constructed entirely of materials that comply with either of the following: 1. Noncombustible materials. 2. Materials that meet a peak rate of heat release not exceeding 300 kW/ m2 when tested in accordance with ASTM E1354 at an incident heat flux of 50 kW/m2 in the horizontal orientation. 3316.2.4 Spontaneous ignition. Materials susceptible to spontaneous ignition, such as oily rags, shall be stored in a listed disposal container. 3316.3 Burning of combustible debris, rubbish and waste. Combustible debris, rubbish and waste material shall not be disposed of by burning on the site. 3316.4 Open burning. Open burning shall comply with the Chicago Fire Prevention Code. 3316.5 Fire watch. Where required by the fire code official or the prefire plan established in accordance with Section 3314.3, a fire watch shall be provided for demolition and construction work that is unusually hazardous in nature, such as temporary heating or hot work. 3316.5.1 Fire watch during construction. Where required by the fire code official, a fire watch shall be provided during nonworking hours for new construction that exceeds 40 feet (12.2 m) in height above the lowest adjacent grade. 3316.5.2 Fire watch personnel. Trained personnel shall be provided to serve as an on-site fire watch. Fire watch personnel shall be provided with not fewer than one means for notification of the fire department, and the sole duty of such personnel shall be to perform constant patrols and watch for the occurrence of fire. The combination of fire watch duties and site security duties is acceptable. Fire watch personnel shall be trained in the use of portable fire extinguishers. 3316.5.3 Fire watch location and records. The fire watch shall include areas specified by the prefire plan established in accordance with Section 3314.3. The fire watch personnel shall keep a record of all time periods of duty, including a log entry each time the site was patrolled and each time a structure under construction was entered and inspected. The records and log entries shall be made available for review by the fire code official upon request. 3316.6 Cutting and welding. Welding, cutting, open torches and other hot work operations and equipment shall comply with the Chicago Fire Prevention Code. 3316.7 Electrical. Temporary wiring for electrical power and lighting installations used in connection with the construction, alteration or demolition of buildings, structures, equipment or similar activities shall comply with the Chicago Electrical Code. 3316.8 Cooking. Cooking shall be prohibited except in designated cooking areas. Signs with a minimum letter height of 3 inches (76 mm) and a minimum brush stroke of 1/2 inch (13 mm) shall be posted in conspicuous locations in designated cooking areas and state: DESIGNATED COOKING AREA. COOKING OUTSIDE OF A DESIGNATED COOKING AREA IS PROHIBITED."

Municipal Code of Chicago § 14B-33-3317 Flammable and combustible liquids.

14B-33-3317 Flammable and combustible liquids. The following language is adopted as a new Section 3317: "3317. FLAMMABLE AND COMBUSTIBLE LIQUIDS 3317.1 Storage of flammable and combustible liquids. Storage of flammable and combustible liquids shall be in accordance with the Chicago Fire Prevention Code. 3317.2 Class I and Class II liquids. The storage, use and handling of flammable and combustible liquids at construction sites shall be in accordance with the Chicago Fire Prevention Code. Ventilation shall be provided for operations involving the application of materials containing flammable solvents. 3317.3 Housekeeping. Flammable and combustible liquid storage areas shall be maintained clear of combustible vegetation and waste materials. Such storage areas shall not be used for the storage of combustible materials. 3317.4 Precautions against fire. Sources of ignition and smoking shall be prohibited in flammable and combustible liquid storage areas. Signs shall be posted in accordance with the Chicago Fire Prevention Code. 3317.5 Handling at point of final use. Class I and II liquids shall be kept in appropriate safety containers. 3317.6 Leakage and spills. Leaking vessels shall be immediately repaired or taken out of service and spills shall be cleaned up and disposed of properly."

Municipal Code of Chicago § 14B-33-3318 Flammable gases.

14B-33-3318 Flammable gases. The following language is adopted as a new Section 3318: "3318. FLAMMABLE GASES 3318.1 Storage and handling. The storage, use and handling of flammable gases shall comply with the Chicago Fire Prevention Code. 3318.2 Cleaning with flammable gas. Flammable gases shall not be used to clean or remove debris from piping open to the atmosphere. 3318.2.1 Pipe cleaning and purging. The cleaning and purging of flammable gas piping systems, including cleaning new or existing piping systems, purging piping systems into service and purging piping systems out of service, shall comply with NFPA 56. Exceptions: 1. Compressed gas piping systems other than fuel gas piping systems where in accordance with the Chicago Fire Prevention Code. 2. Piping systems regulated by the Chicago Fuel Gas Code. 3. Liquefied petroleum gas systems in accordance with the Chicago Fire Prevention Code." (Amend Coun. J. 2-19-20, p. 14473, Art. II, § 100)

Municipal Code of Chicago § 14B-33-3319 Explosive materials.

14B-33-3319 Explosive materials. The following language is adopted as a new Section 3319: "3319. EXPLOSIVE MATERIALS 3319.1 Storage and handling. Explosive materials shall be stored, used and handled in accordance with the Chicago Fire Prevention Code. 3319.2 Supervision. Blasting operations shall be conducted in accordance with the Chicago Fire Prevention Code. 3319.3 Demolition using explosives. Fire hoses for use by demolition personnel shall be maintained at the demolition site wherever explosives are used for demolition. Such fire hoses shall be connected to a water supply and shall be capable of being brought to bear on post-detonation fires anywhere on the site of the demolition operation."

Municipal Code of Chicago § 14B-33-3320 Fire reporting.

14B-33-3320 Fire reporting. The following language is adopted as a new Section 3320: "3320. FIRE REPORTING 3320.1 Emergency telephone. Emergency telephone facilities with ready access shall be provided at the construction site, or an equivalent means of communication shall be provided. The street address of the construction site and the emergency telephone number of the fire department shall be posted adjacent to the telephone. Alternatively, where an equivalent means of communication is used the site address and fire department emergency telephone number shall be posted at the main entrance to the site, in guard shacks and in the construction site office."

Municipal Code of Chicago § 14B-33-3321 Motorized construction equipment.

14B-33-3321 Motorized construction equipment. The following language is adopted as a new Section 3321: "3321. MOTORIZED CONSTRUCTION EQUIPMENT 3321.1 Conditions of use. Internal-combustion-powered construction equipment shall be used in accordance with all of the following conditions: 1. Equipment shall be located so that exhausts do not discharge against combustible material. 2. Exhausts shall be piped to the outside of the building. 3. Equipment shall not be refueled while in operation. 4. Fuel for equipment shall be stored outside of the building."

Municipal Code of Chicago § 14B-33-3322 Safeguarding roofing operations.

14B-33-3322 Safeguarding roofing operations. The following language is adopted as a new Section 3322: "3322. SAFEGUARDING ROOFING OPERATIONS 3322.1 General. Roofing operations utilizing heat-producing systems or other ignition sources shall be conducted in accordance with the Chicago Fire Prevention Code. 3322.2 Asphalt and tar kettles. Asphalt and tar kettles shall be operated in accordance with the Chicago Fire Prevention Code. 3322.3 Fire extinguishers for roofing operations. Fire extinguishers shall comply with the Chicago Fire Prevention Code. There shall be not less than one multiple-purpose portable fire extinguisher with a minimum 3-A 40-B:C rating on the roof being covered or repaired."

Municipal Code of Chicago § 14B-33-3323 Scaffolding.

14B-33-3323 Scaffolding. The following language is adopted as a new Section 3323: "3323. SCAFFOLDING 3323.1 Construction. Scaffolding shall be constructed and installed to protect the safety of persons working on, passing under or passing by the scaffolding. 3323.2 Material. When the extent or location of scaffolding is such as to create an unusual fire hazard, the fire code official is authorized to require the use of noncombustible material or fire-retardant treated wood. 3323.3 Safeguards. Scaffolding shall be constructed, operated, maintained and disassembled in a manner that follows accepted engineering practice and the manufacturer’s specifications. ASSE A10.8 and ASME A120.1 shall be considered as accepted engineering practice, as shall other national standards deemed applicable by the building official. 3323.3.1 Not in use. When scaffolding is, or is expected to be, unoccupied for more than two hours, such scaffolding shall be safely and securely attached to the building in accordance with federal regulations, ASSE standards and the manufacturer’s specifications. 3323.3.2 Wind. When wind conditions actually do, or are predicted or expected to, or based on other measurements can reasonably be extrapolated to, exceed a velocity at the scaffold level identified in the manufacturer’s specifications as posing a hazard, such scaffolding shall be lowered to the ground and secured or, if required by the manufacturers’ specifications, raised to the roof and secured." (Amend Coun. J. 2-19-20, p. 14473, Art. II, § 101)

Municipal Code of Chicago § 14B-33-3324 Construction site cleanliness.

14B-33-3324 Construction site cleanliness. The following language is adopted as a new Section 3324: "3324. CONSTRUCTION SITE CLEANLINESS 3324.1 General. Work sites shall be maintained in accordance with Sections 3324.2 through 3324.5 during construction, demolition, excavation and rehabilitation activities. Exception: The provisions of this section do not apply to activities conducted within a completely enclosed structure. 3324.2 Fencing. Work sites shall be enclosed and secured by a continuous fence at least 6 feet (1829 mm) in height which shall be anchored to resist wind loads of 30 pounds per square foot (1436 Pa) without deflection of more than 3 inches (76.2 mm) between the top and bottom of the fence. The fence, including gates, shall be covered for its full height and length in fabric mesh that will allow the passage of air but contain dust and dirt. The owner and general contractor shall be responsible for keeping the fence and fabric mesh in good repair and free of graffiti and unauthorized advertising. 3324.2.1 Gate. One gate, no larger than is reasonably necessary to allow truck access, may remain open when workers are actively working on the site. 3324.3 Storage. All construction materials, dumpsters and debris collection devices shall be kept within the required fence unless a permit for use of the public way has been obtained from the Commissioner of Transportation. Dumpsters shall be regularly serviced to prevent contents from extending past the top of the dumpster. Construction materials and waste shall be gathered at the end of each work day and stored or disposed of in a neat and orderly manner. Where materials are stored for use on floors above grade, they shall be secured to prevent loosening or dispersion due to weather conditions or other phenomena. 3324.4 Litter and garbage. Sealed containers for litter and garbage shall be provided throughout the work site. At least one container shall be provided for every floor and every 4,000 square feet (372 m 2 ) of work area. All litter and garbage must be removed from the work site daily. 3324.5 Dust control. The general contractor shall employ adequate wetting or other abatement measures to prevent the off-site dispersion of dust and debris from the work site. The general contractor shall take necessary steps to minimize the amount of dirt and debris that is transmitted by construction vehicles, including but not limited to stoning or paving of haul roads, wheel wash stations and street sweepers. All construction and demolition debris shall be removed from upper floors using dust-tight chutes or lowered in containers. Construction and demolition debris shall not be dropped or thrown from any floor. Where work occurs on a level that is four or more stories above grade plane, the work area shall be enclosed with fabric mesh as provided in Section 3324.2. 3324.5.1 Masonry work. For masonry work, the immediate work area shall be enclosed to contain dust and debris from grinding or cutting operations. (Amend Coun. J. 2-19-20, p. 14473, Art. II, 102)

Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2668157Fetched: 10/24/2026