14B-10-1010 Doors, gates and turnstiles.

The provisions of Section 1010 of IBC are adopted by reference with the following modifications:

1.   Revise exception 1 to Section 1010.1.1 to read:

"1.   Within Group R-2, R-3 and R-5 dwelling and sleeping units that are not required to be an Accessible unit, Type A unit or Type B unit, the minimum clear opening width of an exit access doorway, other than the primary entrance to the unit, shall be 28 inches (711 mm), and the minimum and maximum width shall not apply to door openings that are not part of the required means of egress."

2.   Delete exception 8 to Section 1010.1.1.

3.   Revise exceptions 11 and 12 to Section 1010.1.1 to read:

"11.   The minimum clear opening width shall not apply to doors for shower or sauna compartments not required to be accessible.

12.   The minimum clear opening width shall not apply to the doors for toilet stalls or single-user toilet rooms not required to be accessible."

4.   Revise exception 4 to Section 1010.1.2 to read:

"4.   Doors within or serving a single dwelling unit in Groups R-2, R-3 and R-5."

5.   Delete exceptions 6 and 8 to Section 1010.1.2.

6.   Revise exception 9 to Section 1010.1.2 by replacing "Group H" with "Groups E and H."

7.   Revise Section 1010.1.3 to read:

"1010.1.3 Door opening force.

The force for pushing or pulling open interior swinging egress doors, other than fire doors, shall not exceed 5 pounds (22 N). The force for pushing or pulling open exterior hinged doors and gates shall not exceed 8.5 pounds (38 N). These forces do not apply to the force required to retract latch bolts or disengage other devices that hold the door in a closed position. For other swinging doors, as well as sliding and folding doors, the door latch shall release when subjected to a 15-pound (67 N) force. The door shall be set in motion when subjected to a 30-pound (133 N) force. The door shall swing to a full-open position when subjected to a 15-pound (67 N) force.

Exceptions:

1.   Group R-5.

2.   Within Type B units.

3.   Within or serving only dwelling units that are not required to be Type B units."

8.   Revise the exception to Section 1010.1.4.1.2, item 4, by replacing "in an approved location and clearly identified" with "within sight of the revolving door."

9.   Delete Section 1010.1.4.3.

10.   Delete Section 1010.1.4.4.1.

11.   Revise exception 1 to Section 1010.1.5, exclusive of subparts, to read:

"1.   Doors serving individual dwelling units in Groups R-2, R-3 and R-5 occupancies where the following apply:"

12.   Revise exception 3 to Section 1010.1.5 to read:

"3.   In Group R-2, R-3 and R-5 occupancies not required to be Accessible units, Type A units or Type B units, the landing at an exterior doorway shall be not more than 8 inches (203 mm) below the top of the threshold, provided the door, other than an exterior storm or screen door, does not swing over the landing."

13.   Revise exception 5 to Section 1010.1.5 to read:

"5.   Exterior decks, patios or exterior balconies that are part of Type B dwelling units, have impervious surfaces and that are not more than 4 inches (102 mm) below the finished floor level of the adjacent interior space of the dwelling unit."

14.   Revise Section 1010.1.6 to read:

"1010.1.6 Landings at doors.

Landings shall have a width not less than the width of the stairway or the door, whichever is greater. Doors in the fully open position shall not reduce a required dimension by more than one-quarter its required width. Landings shall have a length measured in the direction of travel of not less than 44 inches (1118 mm).

Exception: Landing length in the direction of travel in Groups R-3, R-5 and U and within individual units of Group R-2 need not exceed 36 inches (914 mm)."

15.   Revise the exceptions to Section 1010.1.7 to read:

"Exceptions:

1.   In occupancy Group R-2, R-3 or R-5, threshold heights for sliding and side-hinged exterior doors shall be permitted to be up to 8 inches (203 mm) in height if all of the following apply:

1.1.   [Reserved.]

1.2.   The door is not part of an accessible route as required by Chapter 11.

1.3.   The door is not part of an Accessible unit, Type A unit or Type B unit.

2.   In Type B units, where Exception 5 to Section 1010.1.5 permits a 4-inch (102 mm) elevation change at the door, the threshold height on the exterior side of the door shall not exceed 4 3/4 inches (120 mm) in height above the exterior deck, patio or exterior balcony for sliding doors or 4 1/2 inches (114 mm) above the exterior deck, patio or exterior balcony for other doors."

16.   Revise the exceptions to Section 1010.1.8 to read:

"Exceptions:

1.   The minimum distance between horizontal sliding power-operated doors in a series shall be 48 inches (1219 mm).

2.   Storm and screen doors serving individual dwelling units in Groups R-2, R-3 and R-5 need not be spaced 48 inches (1219 mm) from the other door.

3.   Doors within individual dwelling units in Groups R-2, R-3 and R-5 other than within Accessible units and Type A units."

17.   Revise Section 1010.1.9.4 to read:

"1010.1.9.4 Locks and latches.

Locks and latches shall be permitted to prevent operation of doors where any of the following exist:

1.   Places of detention or restraint.

2.   Where approved by the fire code official, in buildings in occupancy Group A having an occupant load of 300 or less, Groups B, F, M and S, and in places of religious worship, the main door or doors are permitted to be equipped with key-operated locking devices from the egress side provided:

2.1.   The locking device is readily distinguishable as locked.

2.2.   A readily visible durable sign is posted on the egress side on or adjacent to the door stating: THIS DOOR TO REMAIN UNLOCKED WHEN THIS SPACE IS OCCUPIED. The sign shall be in letters 1 inch (25 mm) high on a contrasting background.

2.3.   The use of the key-operated locking device is revocable by the fire code official for due cause.

3.   Where egress doors are used in pairs, automatic flush bolts shall be permitted to be used, provided that the door leaf having the automatic flush bolts does not have a doorknob or surface-mounted hardware.

4.   Doors from individual dwelling or sleeping units of Group R occupancies having an occupant load of 10 or less are permitted to be equipped with a night latch, dead bolt or security chain, provided such devices are openable from the inside without the use of a key, tool or special knowledge.

5.   Fire doors after the minimum elevated temperature has disabled the unlatching mechanism in accordance with listed fire door test procedures.

6.   Doors serving roofs not intended to be occupied shall be permitted to be locked preventing entry to the building from the roof."

18.   Delete exception 3 to Section 1010.1.9.5.

19.   Revise exception 4 to Section 1010.1.9.5 to read:

"4.   Where a pair of doors serves a Group B, F or S occupancy, manually operated edge- or surface-mounted bolts are permitted on the inactive leaf provided that such inactive leaf is not needed to meet egress capacity requirements. The inactive leaf shall not contain doorknobs, panic bars or similar operating hardware."

20.   Revise item 5 in Section 1010.1.9.7 to read:

"5.   The procedures for unlocking the doors shall be described and accepted as part of the emergency planning and preparedness required by the Chicago Fire Prevention Code."

20.1.   Revise Section 1010.1.9.8 by inserting an item 3 to read:

“3.   Group A occupancies in airport terminals.”

21.   Revise items 3 and 4 (including the exception) in Section 1010.1.9.8.1 to read:

"3.   The delayed egress locking system shall have the capability of being deactivated at the fire command panel. Nothing in this section shall prohibit installation of deactivation means at additional locations.

4.   An attempt to egress shall initiate an irreversible process that shall allow such egress not more than 15 seconds after pressure is applied to the egress-side door hardware for not more than 1 second. Initiation of the irreversible process shall activate an audible signal in the vicinity of the door. Once the delay electronics have been deactivated, rearming the delay electronics shall be by manual means only. The time delay shall not be field adjustable."

22.   Delete item 6.2 in Section 1010.1.9.8.1.

23.   Add new item 9 in Section 1010.1.9.8.1 to read:

"9.   The door must swing in the direction of egress travel."

24.   Revise Section 1010.1.9.11 by replacing "an approved" with "a."

Revise exceptions 3 through 5 to Section 1010.1.9.12 to read:

"3.   In interior exit stairways serving more than 4 stories, exit doors are permitted to be locked from the side opposite the egress side, provided that they are openable from the egress side and capable of being unlocked simultaneously without unlatching both automatically, by smoke detectors or waterflow devices, and manually, upon a signal from the fire command panel, if present, or a signal by building management or emergency personnel from a single location inside the main entrance to the building. A telephone or other two-way communication system connected to a constantly monitored location shall be provided in the exit stairway at not less than every fifth story.

4.   In interior exit stairways serving 4 or fewer stories in other than Group A, E, H, and I occupancies, exit doors are permitted to be locked from the side opposite the egress side.

5.   Stairway exit doors shall be openable from the egress side and shall only be locked from the opposite side in Group R-2 or R-5 occupancies where the only interior access to the dwelling unit is from a single interior exit stairway."

25.   Revise the exception to Section 1010.2 to read:

"Exception: Horizontal sliding or swinging gates exceeding the 4-foot (1219 mm) maximum leaf width limitation are permitted in exterior fences and walls."

26.   Insert a new Section 1010.2.2 to read:

"1010.2.2 Residential buildings.

Exterior gates which are part of the exit discharge for a Group R-2, R-3, R-4 or R-5 occupancy shall conform to the applicable requirements of this section.

1010.2.2.1 Small residential buildings.

On a lot containing buildings with not more than 4 stories above grade plane and not more than 4 dwelling units or sleeping units, an exterior gate is allowed to require a key or special tool to operate in either or both directions.

1010.2.2.2 Large residential buildings.

On a lot containing buildings with 5 or more stories above grade plane or containing 5 or more dwelling units or sleeping units, an exterior gate shall not require a key or special tool to operate in the direction of egress."

27.   Revise Section 1010.3.2 by replacing "an approved" with "a."

(Amend Coun. J. 2-19-20, p. 14473, Art. II, § 44; Amend Coun. J. 12-14-22, p. 58278, Art. III, § 3; Amend Coun. J. 1-24-24, p. 8634, Art. IV, § 3)

14B-10-1011 Stairways.

The provisions of Section 1011 of IBC are adopted by reference with the following modifications:

1.   Revise exception 1 to Section 1011.2 by replacing "an occupant load" with "a story or mezzanine with an occupant load".

1.1.   Revise exception 3 to Section 1011.2 by replacing "Group R-3" with "Group R-3 or R-5."

2.   Revise Section 1011.3 by replacing "80 inches (2032 mm)" with "7 feet (2134 mm)."

3.   Revise exception 2 to Section 1011.3 to read:

"2.   The required headroom clearance shall be not less than 80 inches (2032 mm), and where the nosings of treads at the side of a flight extend under the edge of a floor opening through which the stair passes, the floor opening shall be allowed to project horizontally into the required headroom not more than 4 3/4 inches (121 mm) in any of the following conditions:

2.1.   In Group R-3 and R-5 occupancies.

2.2.   Within dwelling units in Group R-2 occupancies.

2.3.   In Group U occupancies that are accessory to a Group R-3 occupancy or accessory to individual dwelling units in Group R-2 occupancies."

4.   Revise Section 1011.4 to read:

"1011.4 Walkline.

Where a stair includes winder treads, the walkline shall comply with Section 1011.4.1 or 1011.4.2.

1011.4.1 Other than Group R-5 occupancies and within dwelling units.

The walkline across winder treads in other than R-5 occupancies and within individual dwelling units in Group R-2 occupancies shall be concentric to the direction of travel through the turn and located 12 inches (305 mm) from the side where the winders are narrower. The 12-inch (305 mm) dimension shall be measured from the widest point of the clear stair width at the walking surface of the winder. Where winders are adjacent within the flight, the point of the widest clear stair width of the adjacent winders shall be used.

1011.4.2 Group R-5 occupancies and within dwelling units.

The walkline across winder treads in R-5 occupancies and within individual dwelling units in Group R-2 occupancies shall be concentric to the direction of travel through the turn and located 18 inches (457 mm) from the side where the winders are narrower."

5.   Revise exception 3 to Section 1011.5.2 to read:

"3.   The maximum riser height shall be 8 inches (203 mm), the minimum tread depth shall be 9 inches (229 mm), the minimum winder tread depth at the walkline shall be 9 inches (229 mm) and a nosing projection not less than 1 inch (25 mm) but not more than 1 1/4 inches (32 mm) shall be provided where the tread depth is less than 10 inches (254 mm) in any of the following conditions:

3.1.   In Group R-3 and R-5 occupancies.

3.2.   Within dwelling units in Group R-2 occupancies.

3.3.   In interior and exterior stairways in Group R-2 occupancies serving only units that are not required to be Accessible units or Type A units.

3.4.   In Group U occupancies that are accessory to a Group R-3 occupancy or accessory to individual dwelling units in Group R-2 occupancies."

6.   Revise Section 1011.5.3 to read:

"1011.5.3 Winder treads.

Winder treads are not permitted in means of egress stairways.

Exceptions:

1.   Curved stairways in accordance with Section 1011.9.

2.   Spiral stairways in accordance with Section 1011.10.

3.   Within or serving a building of Group R-3 or R-5 occupancy.

4.   Within a dwelling unit in a Group R occupancy."

6.1.   Revise Section 1011.5.5 by deleting the second sentence.

7.   Revise Section 1011.5.5.3 to read:

"1011.5.5.3 Riser profile.

Risers shall be solid and vertical or sloped under the tread above from the underside of the nosing above at an angle not more than 30 degrees (0.52 rad) from the vertical.

Exceptions:

1.   Interior stairways that are not required to comply with Section 1009.3, provided that the opening between treads does not permit the passage of a sphere with a diameter of 6 inches (152 mm).

2.   Occupancies in Group I-3 or in Group F, H and S occupancies other than areas accessible to the public. The size of the opening in the riser is not restricted.

3.   Spiral stairways constructed in accordance with Section 1011.10.

4.   Exterior stairways that are not required to comply with Section 1009.3."

8.   [Reserved.]

9.   Revise Section 1011.6 to read:

"1011.6 Stairway landings.

There shall be a floor or landing at the top and bottom of each stairway. The width of landings, measured perpendicularly to the direction of travel, shall be not less than the width of stairways served. Every landing shall have a minimum depth, measured parallel to the direction of travel, equal to the width of the stairway or 48 inches (1219 mm), whichever is less. Doors opening onto a landing shall not reduce the landing by more than one-quarter the required width. Where wheelchair spaces are required on the stairway landing in accordance with Section 1009.6.3, the wheelchair space shall not be located in the required width of the landing and doors shall not swing over the wheelchair spaces.

Exceptions:

1.   Where stairways connect stepped aisles to cross aisles or concourses, stairway landings are not required at the transition between stairways and stepped aisles constructed in accordance with Section 1029.

2.   Where doors are allowed by Section 1010.1.5."

9.1.   Revise Section 1011.7 to read:

"1011.7 Stairway construction.

Stairways shall be built of materials consistent with the type of construction of the building.

Exceptions:

1.   Stairways connecting five or more stories shall be built of and supported by noncombustible materials. Shaft enclosures for stairways connecting five or more stories shall be built of noncombustible materials.

2.   Wood handrails shall be permitted for all types of construction."

10.   Revise the exception to Section 1011.7.3 by replacing "Group R-2 or R-3" with "Group R-2, R-3 or R-5."

11.   Revise Section 1011.8 to read:

"1011.8 Vertical rise.

A flight of stairs shall not have a vertical rise greater than 12 feet (3658 mm) between floor levels or landings.

Exceptions:

1.   Spiral stairways used as a means of egress from technical production areas.

2.   In Group R-3 and R-5 occupancies a flight of stairs may have a vertical rise not greater than 151 inches (3835 mm) between floor levels or landings."

12.   Revise the exception to Section 1011.9 by replacing "Group R-3" with "Group R-3 and R 5."

13.   Revise the first sentence of Section 1011.10 to read:

"Spiral stairways are permitted to be used as a component in the means of egress in the following locations only:

1.   Within a dwelling unit.

2.   Serving a single dwelling unit.

3.   From a space not more than 250 square feet (23 m 2 ) in area and serving not more than five occupants.

4.   From a technical production area in accordance with Section 410.5 ."

14.   Revise Section 1011.11 to read:

"1011.11 Handrails.

Flights of stairs shall have handrails on each side and shall comply with Section 1014. Where glass is used to provide or support the handrail, the handrail or support shall comply with Section 2407.

Exceptions:

1.   Flights of stairs within dwelling units and spiral stairways are permitted to have a handrail on one side only.

2.   Decks, patios and walkways accessory to Group R-5 occupancies or individual dwelling units that have a single change in elevation where the landing depth on each side of the change of elevation is greater than what is required for a landing do not require handrails.

3.   Where allowed, a change in elevation consisting of a single riser at an entrance or egress door does not require handrails.

4.   Changes in elevation of three or fewer risers within or accessory to individual dwelling units and sleeping units in Group R-2, R-3 and R-5 do not require handrails.

5.   Flights of stairs that serve as stepped aisles for seating areas shall have handrails either at one or both sides of the aisle or within the aisle width."

15.   Revise Section 1011.12 to read:

"1011.12 Stairway to roof.

In buildings with four or more stories above grade plane, one stairway shall extend to the roof surface unless the roof has a slope greater than or equal to three units vertical in 12 units horizontal (25-percent slope).

Exception: Other than where required by Section 1011.12.1, in buildings without an occupiable rooftop, access to the roof from the top story shall be permitted to be by an alternating tread device, a ship's ladder or a permanent ladder."

16.   Revise Section 1011.12.2 to read:

"1011.12.2 Roof access.

Where a stairway is provided to a roof, access to the roof shall be provided through a penthouse complying with Section 1510.2.

Exception: In buildings without an occupiable rooftop, access to the roof shall be permitted to be a roof hatch or trap door not less than 16 square feet (1.5 m2) in area and having a minimum dimension of 2 feet (610 mm)."

17.   Revise Section 1011.14 by adding the following after the last sentence:

"The minimum clear width at and below the handrails shall be 20 inches (508 mm)."

18.   Delete the exception to Section 1011.14.2.

19.   Revise the second sentence of Section 1011.16 to read:

"Permanent ladders shall be constructed in accordance with the Chicago Mechanical Code."

(Amend Coun. J. 2-19-20, p. 14473, Art. II, § 45; Amend Coun. J. 10-7-20, p. 21791, Art. II, § 23; Amend Coun. J. 1-26-22, p. 43756, Art. II, § 9)

14B-10-1012 Ramps.

The provisions of Section 1012 of IBC are adopted by reference with the following modifications:

1.   Revise exception 1 to Section 1012.6.3 by replacing "Group R-2 and R-3" with "Group R-2, R-3 and R-5."

2.   Revise the exception to Section 1012.6.4 by replacing "Group R-2 and R-3" with "Group R-2, R-3 and R-5."

14B-10-1013 Exit signs.

The provisions of Section 1013 of IBC are adopted by reference with the following modifications:

1.   Revise Section 1013.1 by deleting "approved."

2.   Revise the exceptions to Section 1013.1 to read:

"Exceptions:

1.   Exit signs are not required in rooms or areas that require only one exit or exit access.

2.   Main exterior exit doors or gates that are obviously and clearly identifiable as exits need not have exit signs where approved by the fire code official.

3.   Exit signs are not required in occupancies in Group U and individual sleeping units or dwelling units in Group R-1, R-2, R-3 or R-5.

4.   Exit signs are not required in dayrooms, sleeping rooms or dormitories in occupancies in Group I-3."

3.   Delete Section 1013.2.

4.   Revise Section 1013.3 to read:

"1013.3 Illumination.

Exit signs shall be internally illuminated.

Exception: Visual character signs required by Section 1013.14 shall be internally or externally illuminated at all times. Tactile signs required by Section 1013.4 need not be provided with illumination."

5.   Revise Section 1013.4 to read:

"1013.4 Raised character and braille signs.

Signs stating "AREA OF REFUGE," "EXTERIOR AREA FOR ASSISTED RESCUE," "EXIT," "STAIR" or "FIRE ESCAPE," as required by Sections 1009.9 and 1013.6.1, in visual characters, raised characters and braille and complying with ICC A117.1 shall be provided adjacent to each door to an area of refuge, or providing direct access to an exit stairway, an exterior area for assisted rescue, an exit ramp, an exit passageway or the exit discharge."

6.   Delete Section 1013.5.

7.   Revise Section 1013.6 and its subsections to read:

"1013.6 Internally illuminated exit signs.

Internally illuminated exit signs shall comply with Sections 1013.6.1 through 1013.6.3.

1013.6.1 Graphics.

Every exit sign and directional exit sign shall have plainly legible letters not less than 3 3/8 inches (86 mm) high with the principal strokes of the letters not less than 9/16 inch (14 mm) wide. Directional exit signs shall have a horizontal arrow below the lettering not less than 1/2 inch (13 mm) wide, running the full length of the lettering. Signs larger than the minimum established in this section shall have letter widths, strokes and spacing in proportion to their height.

The lettering and arrow shall be red on a white translucent background and shall be clearly discernible when the means of exit sign illumination is or is not energized.

1013.6.1.1 Exit sign.

Exit signs, other than those subject to Section 1013.6.1.2 or 1013.6.1.3 shall read "EXIT."

1013.6.1.2 Stair sign.

Exit signs located immediately over an exit access stairway or exit access door leading to an exit stairway shall read "STAIR" or "EXIT STAIR." In existing buildings, new exit signs may also read "STAIRS" or "STAIRWAY" if consistent with existing exit signs.

1013.6.1.3 Fire escape sign.

In existing buildings, exit signs and directional exit signs leading to a fire escape shall read "FIRE ESCAPE."

1013.6.2 Exit sign illumination.

The face of an exit sign shall be illuminated to meet the luminance measurement test in UL 924.

1013.6.3 Power source.

Exit signs shall be illuminated at all times. To ensure continued illumination for a duration of not less than 90 minutes in case of primary power loss, the sign illumination means shall be connected to an emergency power system provided from storage batteries, unit equipment or an on-site generator. The installation of the emergency power system shall be in accordance with Article 700 of the Chicago Electrical Code."

14B-10-1014 Handrails.

The provisions of Section 1014 of IBC are adopted by reference with the following modifications:

1.   Revise exception 2 to Section 1014.2 by replacing "Group R-3" with "Group R-3 or R-5."

2.   Revise the exception to Section 1014.3 by replacing "Group R-3" with "Group R-3 or R-5."

14B-10-1015 Guards.

The provisions of Section 1015 of IBC are adopted by reference with the following modifications:

1.   Add a new exception 8 to Section 1015.2 to read:

"8.   On the loading side of passenger platforms for fixed guideway transit and passenger rail systems."

2.   Revise item 1 of Section 1015.3 to read:

"1.   From adjacent walking surfaces, excluding any horizontal surface 12 inches (305 mm) or less in depth measured perpendicular to the guard."

3.   Revise exceptions 1, 2 and 3 to Section 1015.3 to read:

"1.   For occupancies in Group R-3 and R-5 not more than three stories above grade plane in height and within individual dwelling units in occupancies in Group R-2, and outdoor areas of individual dwelling units located not more than three stories above grade plane, required guards shall be not less than 36 inches (914 mm) in height measured vertically above the adjacent walking surfaces.

2.   For occupancies in Group R-3 and R-5, and within individual dwelling units in occupancies in Group R-2, guards on the open sides of stairs shall have a height not less than 34 inches (864 mm) measured vertically from a line connecting the leading edges of the treads.

3.   For occupancies in Group R-3 and R-5, and within individual dwelling units in occupancies in Group R-2, where the top of the guard serves as a handrail on the open sides of stairs, the top of the guard shall be not less than 34 inches (864 mm) and not more than 38 inches (965 mm) measured vertically from a line connecting the leading edges of the treads."

4.   Revise the exceptions to Section 1015.4 to read:

"Exceptions:

1.   From a height of 36 inches (914 mm) to 42 inches (1067 mm), guards shall not have openings that allow passage of a sphere 6 inches (152 mm) in diameter.

2.   The triangular openings at the open sides of a stair, formed by the riser, tread and bottom rail shall not allow passage of a sphere 6 inches (152 mm) in diameter.

3.   At elevated walking surfaces for access to and use of electrical, mechanical or plumbing systems or equipment, guards shall not have openings that allow passage of a sphere 21 inches (533 mm) in diameter.

4.   In areas that are not open to the public within occupancies in Group I-3, F, H, M or S; for alternating tread devices and ship's ladders; and in similar locations where children under the age of 5 are unlikely to be present that are approved by the building official, guards shall not have openings that allow passage of a sphere 21 inches (533 mm) in diameter.

5.   In assembly seating areas, guards required at the end of aisles in accordance with Section 1029.17.4 shall not have openings that allow passage of a sphere 4 inches (102 mm) in diameter up to a height of 26 inches (660 mm). From a height of 26 inches (660 mm) to 42 inches (1067 mm) above the adjacent walking surfaces, guards shall not have openings that allow passage of a sphere 8 inches (203 mm) in diameter.

6.   Within individual dwelling units and sleeping units in Group R-2, R-3 and R-5 occupancies, guards shall not have openings that allow passage of a sphere 4 3/8 (111 mm) inches in diameter."

5.   Revise Section 1015.5 to read:

"1015.5 Screen porches.

Porches and decks that are enclosed with insect screening shall be provided with guards where the walking surface is located more than 30 inches (762 mm) above the floor or grade below at any point within 36 inches (914 mm) horizontally to the edge of the screening."

6.   Revise Section 1015.8 and its subparts to read:

"1015.8 Window openings.

Where the bottom of the clear opening of an operable window in a dwelling unit, sleeping unit or common area in a Group R occupancy is located less than 36 inches (914 mm) above the finished floor and more than 72 inches (1829 mm) above the finished grade or other surface below on the exterior of the building, the window shall comply with one of the following:

1.   Operable windows where the bottom of the clear opening is located more than 75 feet (22 860 mm) above the finished grade or other surface below and that are provided with window fall prevention devices that comply with ASTM F2006.

2.   Operable windows where the openings will not allow a 4-inch-diameter (102 mm) sphere within 36 inches (914 mm) of the finished floor or a 6-inch-diameter (152 mm) sphere within 42 inches (1067 mm) of the finished floor to pass through the opening when the window is in its largest opened position.

3.   Operable windows where the openings are provided with window fall prevention devices that comply with ASTM F2090.

4.   Operable windows that are provided with window opening control devices that comply with ASTM F2090.

Exception: In Group R-2 and R-5 occupancies this section only applies where either:

1.   The bottom of the clear opening of an operable window is located less than 24 inches (610 mm) above the finished floor and at least 72 inches (1829 mm) but not more than 20 feet (6096 mm) above the finished grade or other surface below on the exterior of the building.

2.   The bottom of the clear opening of an operable window is located less than 36 inches (914 mm) above the finished floor and more than 20 feet (6096 mm) above the finished grade or other surface below on the exterior of the building."

(Amend Coun. J. 2-19-20, p. 14473, Art. II, § 46; Amend Coun. J. 12-14-22, p. 58278, Art. III, § 4)