CCLME.ORG - DIVISION 1. DEPARTMENT OF INDUSTRIAL RELATIONS CHAPTERS 1 through 6

(continued)
(C) The escalator shall be inspected by the Division, following the completion of Section 3089(d)(5)(A) or (B), and a new permit to operate issued. Escalator owners shall have three years from April 1, 2000 to comply with Section 3089(d)(5).
(6) If provided, the skirt deflection device shall comply with the following:
(A) The rigid portion of the device shall not rise more than 3/4 inch from the parent surface of the balustrade;
(B) The plans, drawings, and specifications on the planned installation of the deflection device shall be submitted to the Division for review before they are installed. The Division shall review the plans, drawings, and specifications to ensure the planned installations and subsequent operation does not conflict with other requirements of Article 13;

(C) The deflection device shall be inspected by the Division for entanglement, entrapment, shearing, or tripping hazard.
(e) Handrails.
(1) Each balustrade shall be provided with a handrail moving in the same direction and at substantially the same speed as the steps.
(2) Each moving handrail shall extend at normal handrail height not less than 12 inches beyond the line of points of the combplate teeth at the upper and lower landings.
(3) Hand or finger guards shall be provided at the point where the handrail enters the balustrade.
(4) The horizontal distance between the center lines of the two handrails, shall not exceed the width of the escalator by more than 19 in. (483mm). Exception to 3089(e)(4): Existing installations installed prior to April 16, 1970.
(f) Step Treads.

(1) The depth of any step tread in the up direction of travel shall be not less than 153/4 inches, and the rise between treads shall be not more than 81/2 inches. The width of a step tread shall be not less than 22 inches nor more than 40 inches. Exceptions to 3089(f)(1):
(1) For existing installations installed prior to the effective date of this order, the width of a step tread shall not be less than 16 inches.
(2) Escalators installed prior to April 16, 1970 at which time no order existed.
(2) The step riser shall be provided with vertical cleats which shall mesh with slots on the adjacent step treads as the steps make the transition from incline to horizontal.
(3) The tread surface of each step shall be slotted in a direction parallel to the travel of the steps. Each slot shall be not more than 1/4 inch wide and not less than 3/8 inch deep; and the distance from center to center of adjoining slots shall be not more than 3/8 inch.

Slots shall be so located on the step tread surface as to form a cleat on each side of the step tread adjacent to the skirt panel.
(g) Combplates.
(1) There shall be a combplate at the entrance and at the exit of every escalator.
(2) The combplate teeth shall be meshed with and set into the slots in the tread surface so that the points of the teeth are always below the upper surface of the treads.
Combplates shall be adjustable vertically. Sections forming the combplate teeth shall be readily replaceable.
(h) Trusses or Girders.
The truss or girder shall be designed to safely sustain the steps and running gear in operation and in the event of failure of the track system, the truss shall retain the tracks, steps, and running gear.

Where tightening devices are operated by means of tension weights, provision shall be made to retain these weights in the truss if they should be released.
(i) Step Wheel Tracks.
Step wheel tracks shall be so designed to contain the step wheels in the track if a step chain breaks.
(j) Rated Load.
(1) For the purpose of structural design, the rated load shall be considered to be not less than:
(Customary Units)
Structural rated load (lb) = 4.6 ( W + 8) A
(Sl Units)
Structural rated load (kg) = 0.27 ( W + 203) A

where
A= length of the horizontal projection of the entire truss, ft(m)
W = width of the escalator, in. (mm)
(2) For the purpose of driving machine and power transmission calculations, the rated load shall be considered to be not less than:
(Customary Units)
Machinery rated load (lb) = 3.5 ( W+ 8) B
(Sl Units)
Machinery rated load (kg) = 0.21 ( W + 203) B
where
B = 1.732 x rise, ft(m)

W = width of the escalator, in. (mm)
(3) For the purpose of brake calculations, the rated load shall be not less than:
(A) With Escalator Stopped
(Customary Units)
Brake rated load (lb) = 4.6 ( W + 8) B
(Sl Units)
Brake rated load (kg) = 0.27 ( W + 203) B
(B) With Escalator Running
(Customary Units)
Brake rated load (lb) = 3.5 ( W + 8) B

(Sl Units)
Brake rated load (kg) = 0.21 ( W + 203) B
where
B = 1.732 x rise, ft(m)
W = width of the escalator, in. (mm)
Exception to 3089(j):
(1) For existing installations installed prior to the effective date of this order, the rated load shall be computed as follows:
The rated load, in pounds, shall be computed by the following formula:
RATED LOAD = 4.6 WA

Where W is the width in inches between the balustrades and A the horizontal distance in feet between the upper and lower combplate teeth. (See figure 3089B).
(k) Design Factors of Safety. The factors of safety, based on the static loads, shall be at least the following:
(1) For driving machine parts:
(A) Where made of steel or bronze, 8.
(B) Where made of cast iron or other materials, 10.
(2) For power-transmission members, 10.
Exception: Step chains composed of cast-steel links which, if thoroughly annealed, shall be permitted with a factor of safety of at least 20.
(3) Steel trusses and supporting structures, including tracks, shall conform to AISC Specification for Design Fabrication and Erection of Structural Steel for Buildings.
( l) Rated Speed. The rated speed shall be not more than 125 feet per minute.

(Title 24, Part 7, Section 7-3089.)

Note: Authority cited: Labor Code Section 142.3. Reference: Labor Code Section 142.3

s 3090. Escalator Machinery and Equipment.
(a) Driving Machine, Motor, and Brake.
(1) The driving machine shall be connected to the main drive shaft by toothed gearing, a coupling, or a chain.
(2) An electric motor shall not drive more than one escalator.

(3) Each escalator shall be provided with an electrically released and mechanically or magnetically applied brake. If the brake is magnetically applied, a ceramic permanent magnet shall be used.
(A) There shall be no intentional time delay designed into the application of the brake.
(B) The brake shall be applied automatically if the electrical power supply is interrupted.
(C) The brake shall be capable of stopping the down running escalator with any load up to the brake rated load.
(D) The escalator brake shall stop the down running escalator at a rate no greater than 3 ft/sec 2 (0.91 m/s 2).
(E) The escalator brake shall be provided with a nameplate which indicates the brake torque in ft-lb (Nm) required to stop and hold brake rated load.
(4) Where means other than a continuous shaft, coupling, or toothed gearing is used to connect the motor to a gear reducer, the escalator brake shall be located on the gear reducer or main drive shaft.
(5)(A) If the escalator brake is separated from the main drive shaft by a chain used to connect the driving machine to the main drive shaft, a mechanically or magnetically applied brake capable of stopping a down running escalator with brake rated load shall be provided on the main drive shaft. If the brake is magnetically applied,a ceramic permanent magnet shall be used.
(B) The brake shall stop the down running escalator at a rate no greater than 3 ft/sec 2 (0.91 m/s 2), at brake rated load.
Exception to 3090 (a)(3), (4), (5):
(1) For existing installations installed prior to the effective date of this order, each escalator shall comply with the following:
Each escalator shall be provided with an electrically released mechanically applied brake capable of stopping the up or down traveling escalator with any load up to rated load, as defined in subsection 3089(j). This brake shall be located either on the driving machine or on the main drive shaft.

Where a chain is used to connect the driving machine to the main drive shaft, a brake shall be provided on the driven shaft. It is not required that this brake be of the electrically released type if an electrically released brake is provided on the driving machine.
(b) Operating and Safety Devices.
(1) Operating and safety devices shall be provided conforming to the requirements of this section.
(A) Starting switches shall be of the key-operated, spring return-type and shall be located within sight of the escalator steps.
(B) Emergency stop buttons or other type of manually operated switches having red buttons or handles shall be accessibly located at or near the top and bottom landings of each escalator, and shall be protected against accidental operation. An escalator stop button with an unlocked cover over it which can readily be lifted or pushed aside shall be considered accessible. The operation of either of these buttons or switches shall interrupt the power to the driving machine. It shall not be possible to start the driving machine by these buttons or switches.

(C) Escalators may be arranged to be started and stopped from remote locations only with prior approval from the division. Such approval will be based on, but not limited to the applicant demonstrating that;
1. There shall be provided an acceptable means of viewing the run and landing of the escalator at the remote location.
2. There shall be provided an acceptable means of communication between the escalator and the remote location.
(D) Escalators may be arranged for automatic starting and stopping only with prior approval from the division. Such approval will be based on, but not limited to, the applicant demonstrating that;
1. The escalator shall be provided with an acceptable means to prevent it from starting when a person is on the steps.
2. The escalator shall be provided with some means to determine the direction the person wishes to go, up or down.

3. The starting shall be such that the step are up to full speed before the person reaches them.
4. The escalator shall be provided with some acceptable means to prevent the escalator from stopping until all riders are off the steps.
5. The escalator landing areas shall be provided with illuminated signs that inform the potential rider of the information needed for safe use of the escalator.
(E) A speed governor shall be provided, the operation of which will cause the interruption of power to the driving machine should the speed of the steps exceed a predetermined value, which shall be not more than 40 percent above the rated speed.
Exception: The overspeed governor is not required where a low slip alternating current squirrel cage induction motor is used and the motor is directly connected to the driving machine.
(F) A broken step-chain device shall be provided that will cause the interruption of power to the driving machine if a step chain breaks, and, where no automatic chain tension device is provided, if excessive sag occurs in either step chain.
(G) An electrically released brake shall automatically stop the escalator when any of the safety devices function.
(H) Where the driving machine is connected to the main drive shaft by a chain, a device shall be provided which will cause the application of the brake on the main drive shaft if the drive chain parts.
(I) Each space containing moving parts, where a means of access is provided, shall be equipped with a stop switch located adjacent to the access door or panel. The stop switches shall:
1. Be of the manually opened and closed type.
2. Be conspicuously and permanently marked, "STOP."
3. Be positively opened mechanically and their opening shall not be solely dependent on springs.

4. When opened, cause electric power to be removed from the escalator driving machine motor and brake.
Exception: Machinery space in which main line disconnect switch is located.
(J) Means shall be provided to cause the opening of the power circuit to the escalator driving machine motor and brake should an object become wedged between the step and the skirt panel as the step approaches the lower combplate.
(K) Rolling shutters, if used, shall be provided with a device which shall be actuated as the shutters begin to close to cause electric power to be removed from the escalator driving machine motor and brake.
(L) Means shall be provided to cause the opening of the power circuit to the driving machine motor and brake in case of accidental reversal of travel while the escalator is operating in the ascending direction.
(c) Access to Machine Rooms or Machinery Spaces. Sufficient clearance shall be provided within the machine room for safe access, as required for inspection and maintenance, and safe access shall be provided to the machine room.

(1) Floor access panels, in excess of 70 lbf (311 N) shall be counterbalanced or provided with means to lift and move the panel away from the machinery space.
(2) The building owner or responsible party shall provide a competent person to assist the Division's representative where steps removal is required to gain access to drive units, brake and upthrust devices inside the escalator truss.
(d) Lighting and Electrical Work. Lighting and electrical work shall conform to the requirements of CCR, Title 24, Part 3, Article 620.
(e) Guarding in Machine Space. A guard shall be provided between the machine room and the steps to prevent accidental contact with the moving steps.
(Title 24, Part 7, Section 7-3090.)

Note: Authority cited: Labor Code Section 142.3. Reference: Labor Code Section 142.3.

s 3091. Design Requirements.
(a) Direction of Passage. Passage from a landing to a treadway or vice versa shall be in the direction of treadway travel at the point of passenger entrance or exit.
(b) Load Rating.
(1) For the purpose of structural design, the load rating shall be considered to be not less than 100 pounds per square foot of exposed treadway.
(2) For the purpose of brake, treadway and power transmission calculations, the load rating shall be considered to be not less than 75 pounds per square foot of exposed treadway.
(c) Width.
(1) The width of a moving walk is the exposed width of treadway and shall be not less than 16 inches. The maximum width shall depend both on the maximum treadway slope at any point on the treadway, and on the treadway speed. The width shall not exceed the value determined by Table 3091C.
(2) The exposed width of treadway shall not be decreased in the direction of travel.
This width requirement applies only to moving walks having entrance to or exit from landings. It is not intended to preclude development of moving walk systems in which changes in width are made safe and practical by direct passage from one treadway to another, subject to the approval of the division.
TABLE 3091C

Maximum Moving Walk Treadway Width in Inches
------------------------------------------------
Maximum Treadway ........................... Above 90 to Above 140 to
Slope At Any .............. 90 fpm max. 140 fpm 180 fpm
Point ..................... Treadway Treadway Treadway
Speed ..................... Speed Speed
0 to 5<> ......... Unrestricted 60 40
above 5 to 8<> ... 40 40 40
above 8 to 15<> .. 40 40 Not permitted

(d) Belt Type Treadways.
(1) Belt type treadways shall be designed with a factor of safety of not less than 5, based on ultimate strength.
(2) Splicing of the treadway belt shall be made in such a manner as to result in a continuous unbroken treadway surface of the same characteristics as the balance of the belt.
(3) The treadway surface shall be grooved in a direction parallel to its travel for the purpose of meshing with comb plates at the landings. Each groove shall be not more than 1/4 inch wide at the treadway surface and not less than 3/16 inch deep; and the distance from center to center of adjoining grooves shall be not more than 1/2 inch. Sides of grooves may slope for mold draft purposes and may be filleted at the bottom.
(e) Belt Pallet Type Treadways.
(1) Pallet connecting chains or other connecting devices between pallets, and pallets where part of the propelling system, shall have a factor of safety of not less than 10, based on ultimate strength.
(2) Splicing of the treadway belt shall be made in such a manner as to result in a continuous unbroken treadway surface of the same characteristics as the balance of the belt.
(3) The treadway surface shall be grooved in a direction parallel to its travel for the purpose of meshing with comb plates at the landings. Each groove shall be not more than 1/4 inch wide at the treadway surface and not less than 3/16 inch deep; and the distance from center to center of adjoining grooves shall be not more than 1/2 inch. Sides of grooves may slope for mold draft purposes and may be filleted at the bottom.
(4) Adjacent ends of pallets shall not vary in elevation more than 1/16 inch. The fasteners that attach the belt to the pallets shall not project above the exposed treadway surface.
(f) Pallet Type Treadway.
(1) Pallet connecting chains or other connecting devices, and pallets where part of the propelling system, shall have a factor of safety of not less than 10, based on ultimate strength.
(2) The maximum clearance between pallets shall be 5/32inch.
(3) The treadway surface of each pallet shall be grooved in a direction parallel to its travel. Each groove shall be not more than 1/4 inch wide at the treadway surface and not less than 3/16 inch deep; and the distance from center to center of adjoining grooves shall be not more than 1/2 inch. Sides of grooves may slope for mold draft purposes and may be filleted at the bottom.
(4) Adjacent ends of pallets shall not vary in elevation more than 1/16 inch.
(g) Treadway Slope. The slope of a treadway shall not exceed 15 degrees at any point.
(h) Speed.
(1) The maximum speed of a treadway shall depend both on the maximum treadway slope at points of entrance or exit, and on the maximum treadway slope at any other point on the treadway. This speed shall not exceed the lesser of the values determined by Tables 3091H1 and 3091H2.
TABLE 3091H1

Maximum Treadway Slope at ...... Maximum Treadway
Point of Entrance or Exit ...... Speed in F.P.M.
0 to 3<>............... 180
above 3 to 5<>......... 160

above 5 to 8<>......... 140
above 8 to 12<>........ 130
above 12 to 15<>....... 125

TABLE 3091H2

Maximum Treadway Slope at ..... Maximum Treadway
Any Point on Treadway ......... Speed in F.P.M.
0 to 8<>.............. 180
above 8 to 15<>....... 140

(2) The maximum speeds listed in Tables 3091H1 and 3091H2 apply only to moving walks having entrance from or exit to landings. It is not intended to preclude development of moving walk systems in which high speeds are made safe and practical by direct passage from one treadway to another, subject to the approval of the division.
(i) Supports.

(1) For slider bed walks, the carrying portion of the treadway shall be supported for its entire width and length except where it passes from a support to a pulley. The surface of the slider bed shall be reasonably smooth. It shall be so constructed that it will not support combustion.
(2) For roller bed walks, the combination of roller spacing, belt tension and belt stiffness shall be such that the deflection of the treadway surface, midway between rollers, shall not exceed the quantity 0.094 inch + (0.004 times center to center distance of rollers in inches) when measured as follows:
The treadway surface shall be loaded midway between rollers with a 25 pound weight concentrated on a cylindrical footpiece 2 inches long by 1 inch diameter placed with its long axis across the belt. Deflection of this footpiece from its unloaded position shall not exceed the figure obtained above.
The rollers shall be concentric and true running within commercially acceptable tolerances.
(3) For edge supported belts, where the treadway belt is transversely rigid and is supported by rollers along its edges, the following requirements shall apply:
(A) With the belt tensioned through the take-up system, the permissible slope of a straight line from the top of a treadway rib adjacent to the center line of the treadway to the top of a treadway rib adjacent to the balustrade, in a line perpendicular to the path of the treadway, shall not ex-ceed 3 percent when the treadway is loaded with a 150 pound weight on a 6 inch by 10 inch plate located on the center line of the treadway with the 10 inch dimension in the direction of treadway travel.
(B) In order to support the treadway in case of localized overload, supports shall be supplied at intervals, not exceeding 6 feet along the centerline of the treadway. The supports shall be located at a level not more than 2 inches below the underside of the treadway when it is loaded under the test conditions required by the preceding paragraph.
(4) For pallet and belt pallet walks, pallet wheel tracks shall be so designed and located as to prevent more than 1/8 inch vertical displacement of the treadway should the pallet connection means break.
(j) Threshold Plates. The entrance to or exit from a moving treadway shall be provided with a threshold plate designed and installed to provide a smooth passage between treadway and landing and vice versa and conform to the following:
(1) The threshold plate shall be provided with a comb.
(2) The threshold comb teeth shall be meshed with and set into the grooves of the treadway surface so that points of the teeth are always below the upper surface of the treadway.
(3) The surface of the plate shall afford a secure foothold. The surface shall be smooth from the point of intersection of the comb teeth and the upper surface of the treadway, for a distance not exceeding 4 inches and not less than 1 inch.
(k) Balustrades. Moving walks shall be provided with an enclosed balustrade on each side conforming to the following:
(1) Construction.
(A) Balustrades without moving handrails shall be designed so as to provide no surfaces which can be gripped by a passenger. On the treadway side, the balustrade shall have no areas or moldings depressed or raised more than 1/4 inch from the parent surface, except when skirt deflection devices, such as brushes, are used per Section 3091(k)(4). Such areas or moldings shall have all boundary surfaces beveled unless parallel to the direction of travel. The balustrades shall extend at normal height not less than 12 inches beyond the end of the exposed treadway.
(B) Glass or plastic panels, if used in the balustrades, shall conform to the requirements of ANSI Z97.1 except that there shall be no requirement for the panels to be transparent.
(C) Balustrades shall be designed to resist the simultaneous application of a lateral force of 40 pounds per lineal foot and a vertical load of 50 pounds per lineal foot, both applied to the top of the balustrade.
(2) The height of the balustrade shall be not less than 30 inches measured perpendicular to the treadway surface. At this height, the inner surface of the balustrade shall be located not more than 8 inches outside the vertical projected edge of the exposed treadway.

(3) If the balustrade covers the edge of the treadway, the clearance between the top surface of the treadway and the underside of the balustrade shall not exceed 1/4 inch. Where skirt panels are used, the horizontal clearance on either side of the treadway between the treadway and the adjacent skirt panel shall be not more than 1/4 inch.
(4) Where moving walks are provided with skirt deflection devices to protect against accidental entrapment of body parts, clothing, shoes, etc., the following shall apply:
(A) The rigid portion of the device shall not rise more than 3/4 inch from the parent surface of the balustrade.
(B) The plans, drawings, and specifications on the planned installation of the deflection device shall be submitted to the Division for review before the deflection device is installed. The Division shall review the plans, drawings, and specifications to ensure the planned installations and subsequent operation does not conflict with other requirements of Article 14.
(C) The deflection device shall be inspected by the Division for entanglement, entrapment, shearing, or tripping hazards.

( l) Guards at Ceiling. Where the intersection of the balustrade (deck board) and the ceiling or soffitt is less than 24 inches from the center line of the handrail, a solid guard shall be provided in the intersecting angle. The vertical face of the guard shall have a height of at least 7 inches and shall be rounded. Guards may be of glass if of the tempered-type conforming to ANSI Z97.1.
(m) Handrails.
(1) Two moving handrails shall be provided on each moving walk.Exceptions:
1. Moving walks having a slope of 3 degrees or less and a speed of 70 feet per minute or less.
2. Moving walks having a width of 21 inches or less; where a single moving handrail may be used.
(2) The moving handrail at both the entrance and exit landings shall extend at normal height at least 12 inches beyond the end of the exposed treadway. The point where the moving handrail enters or leaves an enclosure shall be not more than 10 inches above the floor line.
(3) Hand or finger guards shall be provided at the points where the handrail enters the balustrade.
(4) The moving handrail return run and its driving and supporting machinery shall be fully enclosed.
(5) Each moving handrail shall move in the same direction and at substantially the same speed as the treadway.
(n) Drive, Motor, and Brakes.
(1) The driving machine shall be connected to the main drive shaft by toothed gearing, a coupling or a chain.
(2) Each moving walk shall be provided with an electrically released, mechanically applied brake capable of stopping and holding the treadway with any load up to the load rating. This brake shall be located either on the main drive shaft or on the driving machine and connected to the main drive shaft by toothed gearing, a coupling, or a chain.

Where a chain is used to connect the driving machine to the main drive shaft, a brake shall be provided on that shaft. It is not required that this brake be of the electrically released type if an electrically released brake is provided on the driving machine.
Exception: Moving walks which will not run in the down direction by gravity under any load condition up to their load rating with the power supply interrupted do not require brakes.
(3) Electrically released brakes shall stop the treadway automatically upon failure of power or when any of the safety devices specified in Section 3092(a) operate. Brakes on the main drive shaft, if not of the electrically released type, shall be applied should the drive chain part.
(4) Speed reducers shall meet the requirements for design and application as established for the various types in the appropriate AGMA Practice Standards, as follows:
420.03 -Helical and Herringbone Gear Speed Reducers
430.03 -Spiral Bevel Gear Speed Reducers
440.03 -Single and Double Reduction Cylindrical-Worm and Helical-Worm Speed Reducers
441.03 -Double Enveloping-Worm Gear Speed Reducers
460.04 -Gearmotors
480.03 -Shaft Mounted Speed Reducers
The loading shall be considered to be uniform and the service to be 24 hours per day.
(5) Chain drives shall be of the types covered by the following American Standards.
(A) ANSI B29.1 -Transmission Roller Chains and Sprocket Teeth
(B) ANSI B29.2 -Inverted Tooth Chains and Sprocket Teeth

When operating at the load rating of the treadway, the load imposed on such chains shall not exceed the horsepower rating as established by these standards.
The loading shall be considered to be uniform and the service to be 24 hours per day.
(6) When operating at the load rating of the treadway, the load imposed on V-belt drives shall not exceed the horsepower rating as established by the American Standard Specification for Multiple V-Belt Drives, USAS B55.1. The loading shall be considered to be uniform and the service to be 24 hours per day.
(7) Pallet propelling chains and drive components other than those specified shall have a factor of safety of not less than 10, based on ultimate strength.
(o) Supporting Structure.
The steel supporting structure for the treadway, balustrades, and machinery shall conform to Chapter 27, Part 2, Title 24, CAC.

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3092. Operating and Safety Devices. Electrical Equipment and Wiring.
(a) Devices Required.
Operating and safety devices shall be provided conforming to the following requirements:
(1) Starting switches shall be of the key-operated, spring return-type and shall be located within sight of the exposed treadway.

(2) Emergency stop buttons or other types of manually operated switches having red buttons or handles shall be accessibly located at every entrance to and exit from a moving walk, and shall be protected against accidental operation. The operation of any of these buttons or switches shall interrupt the power to the driving machine and to the brake, where provided. It shall be impossible to start the driving machine by these buttons or switches.
(3) Where the driving machine is connected to the main drive shaft by a chain, and where a brake is located on that shaft when required by Section 3091(n)(2), a device shall be provided which will cause the application by such brake if the drive chain parts.
(4) Moving walks required by Section 3091(n)(2) to be equipped with a brake, or which are driven by a direct current motor, shall be provided with a speed governor which will cause the interruption of power to the driving machine and to the brake, where provided, should the speed of the treadway exceed a predetermined value, which shall be not more than 40 percent above the maximum designed treadway speed.
Exception:

1. Moving walks driven by low slip-alternating current induction motors directly connected to the driving machine do not require speed governors.
2. Moving walks driven by low slip-alternating current induction motors connected to the driving machine by belts or chains, where a device is provided which will cause interruption of power to the motor and apply the brake should the belts lose driving tension or should the belts or chains break.
(5) A device shall be provided which will cause interruption of power to the driving machine and to the brake, where provided, if the connecting means between pallets break.
(6) Where a device is required to interrupt power, such interruption shall be not subject to intentional delay. The use of a supplemental and independent device with or without intentional delay is permissible.
(7) Each space containing moving parts, where a means of access is provided, shall be equipped with a stop switch located adjacent to the access door or panel. The stop switches shall:

(A) Be of the manually opened and closed type.
(B) Be conspicuously and permanently marked, "STOP."
(C) Be positively opened mechanically and their opening shall not be solely dependent on springs.
(D) When opened, cause electric power to be removed from the moving walk driving machine motor and brake.
(b) Electrical Equipment and Wiring. Electrical equipment and wiring shall conform to CCR, Title 24, Part 3, Article 620.
(c) Access and Work Space. Sufficient clearance shall be provided within the machine room for safe access as required for inspection and maintenance, and safe access shall be provided to the machine room.
Floor access panels, in excess of 70 pounds, shall be counterbalanced or provided with means to lift and move the panel away from the machinery space.
(d) Guarding in Machine Space. On pallet type moving walks, a guard shall be provided between the machine room and the pallets to prevent accidental contact with the moving pallets.
(Title 24, Part 7, Section 7-3092)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093. Special Access Elevators.
(a) Scope: Sections 3093 through 3093.60 apply to special access elevators, installed to facilitate access according to Title 24, under the jurisdiction of the Division intended for the exclusive use of persons with disabilities.
(b) Special access elevators installed in locations under the jurisdiction of the Division shall comply with the requirements of Article 15. E xception to 3093(b): Special access elevators allowed by variance.
(c) The machine and associated controllers and equipment shall be installed meeting the requirements of subsection 3011(a) and be secured against unauthorized access.
(d) Use of the elevator shall serve disabled individual(s) only and shall not be used to transport materials and equipment.
(e) The Division shall inspect the elevator, witness a safety test(s) and issue a permit to operate, prior to being placed in service.
(Title 24, Part 7, Section 7-3093)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 18943(b), Health and Safety Code.

s 3093.1. Hoistway Enclosure Construction.
(a) Hoistways shall be fully enclosed meeting the requirements of Section 3010.
(b) Exterior windows within the hoistway shall be protected by grillwork.
(c) Enclosures shall be of sufficient strength to support in true alignment, the hoistway doors, gates and their locking equipment.
(Title 24, Part 7, Section 7-3093.1)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.2. Pits.
(a) A pit shall be provided and the pit depth shall not be less than is required for the installation of the buffers and all other necessary elevator equipment.
(b) The pit shall be kept clean and free from dirt and rubbish. The pit shall not be used for storage purposes and shall be maintained free of an accumulation of water.
(Title 24, Part 7, Section 7-3093.2)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.3. Top Car Clearance.
The top car clearance shall be not less than 6 in. (152 mm) plus 1 in. (25 mm) for each 3 1/3 fpm (0.017 m/s) of the rated speed in excess of 30 fpm (0.15 m/s).
(Title 24, Part 7, Section 7-3093.3)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.4. Protection of Hoistway Openings.
(a) Hoistway doors conforming with Section 3020 shall be provided to protect each landing opening.
(b) Hoistway doors shall be provided with approved interlocks complying with Section 3021. E xception to 3093.4(b): Interlocks may be zoned complying with subsection 3021(d)(1)(D).
(c) Hoistway doors shall be power-operated for special access elevators installed after Sept. 28, 2001.
(1) The power-operated hoistway doors shall be either horizontally sliding or swing type doors.
(A) Horizontally sliding doors shall have power opening that complies with Section 3022(b)(2), and power closing that complies with Sections 3022(c) and 3022(e).
1. Power-operated doors shall remain open for at least 20 seconds when activated.
(B) Where provided, automatic swing type doors shall be low energy, power-operated, and shall comply with ANSI/BHMA A156.19-1990, American National Standard for power assist and low energy power operated doors, except section 3, which is hereby incorporated by reference.
Note : A low energy power-operated door is a door with power mechanisms that open and close the door upon receipt of an actuating signal and does not generate more kinetic energy than specified in ANSI/BHMA A156.19-1990.

(Title 24, Part 7, Section 7-3093.4)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.5. Pipes in Hoistways.
Pipes conveying steam, gas or liquids which, if discharged into the hoistway, would endanger life shall not be installed in the hoistway.
(Title 24, Part 7, Section 7-3093.5)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.6. Horizontal Car Clearances.
(a) There shall be a clearance of not less than 3/4 in. (19 mm) between the car and the hoistway enclosure, and between the car and its counterweight.
(b) The clearance between the car platform and the landing sill shall be not less than 1/2 in. (13 mm) nor more than 1 1/2 in. (38 mm).
(Title 24, Part 7, Section 7-3093.6)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.7. Guarding of Suspension Means.
(a) Ropes and chains passing through a floor or stairway outside the hoistway enclosure shall be enclosed with a solid or openwork enclosure. If of openwork, the enclosure shall reject a ball 1/2 in. (13 mm) in diameter. Means for inspection shall be provided. The floor openings shall not be larger than is necessary to clear the suspension means.
(b) Ropes and chains immediately adjacent to a stairway shall be guarded with solid or openwork panels on the stair side. Openwork panels shall reject a ball 1/2 in. (13 mm) in diameter. E xception to subsection 3093.7(b): Ropes or chains which operate within a guide or track shall be considered suitably guarded.
(Title 24, Part 7, Section 7-3093.7)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.8. Car Frames and Platforms.
(a) Car frames and platforms shall be constructed of metal or a combination of metal and wood having a factor of safety of not less than 5 based on rated load.
(b) Cast iron shall not be used in any member of the car frame or platform other than for guides or guide shoe brackets.
(Title 24, Part 7, Section 7-3093.8)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.9. Car Enclosure.
(a) Except at entrances, cars shall be enclosed on all sides and on the top. The enclosure shall be constructed of solid material, except where other material is permitted by the Division.
(b) Car enclosures shall be secured in conformance with the requirements of subsections 3034(a)(1) and 3034(a)(2).
(c) Glass, where used in elevator cars, shall conform to the requirements of subsection 3034(a)(7).
(Title 24, Part 7, Section 7-3093.9)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.10. Number of Compartments.
The car shall have only one compartment.
(Title 24, Part 7, Section 7-309.10)

Note: Authority cited: Section 142.3, Labor Code, Reference: Section 142.3, Labor Code.

s 3093.11. Car Doors and Gates.
(a) Car doors or gates are required. They shall protect the entire car entrance and be constructed of solid material.
(1) Material shall be non-perforated.
(2) Scissor gates are prohibited.
(b) Power opening, where used for car doors and gates, shall conform to the requirements of subsection 3022(b)(1). Power closing, where used for car doors and gates, shall conform to the requirements of subsections 3022(c), 3022(d), and 3022(e).
(c) Power opening and power closing of car doors or gates shall be required for special access elevators installed after Sept. 28, 2001.
(d) Every car door or gate shall be provided with an electric contact conforming to the requirements of subsection 3034(d)(2). The design of the car door or gate electric contacts shall be such that, for a sliding door or gate, the car cannot move unless the door or gate is within 2 in. (51 mm) of the fully closed position. If the door or gate swings outward to open, the car door or gate must be closed and locked before the car can move.
(e) The distance between the hoistway enclosure opposite the car entrance and the car gate shall not exceed 5 inches.
(Title 24, Part 7, Section 7-3093.11)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.12. Light in Car.
The car shall be provided with an electric light. The control switch for the light shall be located in the car and near the car entrance. The minimum illumination at the car threshold, with the door closed, shall be not less than 5 foot candles (54 lux).
(Title 24, Part 7, Section 7-3093.12)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.13. Counterweights.
(a) Counterweights, where used, shall run in guide rails.
(b) Counterweights shall be located as required by subsection 3013(a).
(c) Where a car counterweight is used, it shall not be of sufficient weight to cause slackening of any rope during acceleration or retardation of the car.
(d) The counterweight sections, whether carried in a frame or not, shall be fastened together and shall also be secured to prevent shifting by an amount which will reduce the running clearance to less than that specified in subsection 3093.6(a).
(Title 24, Part 7, Section 7-3093.13)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.14. Location and Guarding of Counterweights.
Access shall be provided for inspection, maintenance, and repair of an enclosed counterweight and its ropes. Doors on the counterweight enclosure shall be self-closing and self-locking and openable from the outside only with a suitable key. If the enclosure is of such size that the door can be closed when the enclosure is occupied by a person, the door shall be easily openable from the inside without the use of a key or other instrument. A stop switch conforming to the requirements of subsection 3040(b)(5) shall be located adjacent to and inside the opening and operable without entering the enclosure.
(Title 24, Part 7, Section 7-3093.14)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.15. Safeties Required.
Each elevator shall be provided with a car safety. Where the space below the hoistway is not permanently secured against access, the counterweight shall be provided with a safety conforming to the requirements of Section 3093.16.
(Title 24, Part 7, Section 7-3093.15)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.16. Operation of Safeties.
The car safety shall be of the inertia or other approved type operated by the breakage of the suspension means or by the action of a speed governor. If it is a speed governor type, the governor shall operate the safety at a maximum speed of 75 fpm (0.38 m/s). On the breakage of the suspension means, the safety shall operate without delay and independent of the speed governor action.
(Title 24, Part 7, Section 7-3093.16)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.17. Application of Safeties.
The application of any safety required by Section 3093.15 shall conform to the requirements of subsection 3035(i).
(Title 24, Part 7, Section 7-3093.17)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.18. Materials Used in Safeties.
The minimum factors of safety and stresses of safety parts and rope connections shall conform to the requirements of subsection 3106(d).
(Title 24, Part 7, Section 7-3093.18)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.19. Location of Speed Governor.
Where a speed governor is used, it shall be located where it is readily accessible from outside the hoistway and it cannot be struck by any moving object in normal operation or under conditions of overtravel and where there is sufficient space for full movement of the governor parts.
(Title 24, Part 7, Section 7-3093.19)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.20. Opening of the Brake Circuit on Safety Application.
Where a speed governor is used, the motor circuit and the brake circuit shall be opened before or at the time that the safety applies.
(Title 24, Part 7, Section 7-3093.20)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.21. Governor Ropes.
The governor ropes shall be of iron, steel, monel metal or phosphor bronze not less than 1/4 in. (6.3 mm) in diameter. Tiller rope construction shall not be used.
(Title 24, Part 7, Section 7-3093.21)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.22. Car and Counterweight Guide Rails and Guide Fastenings.
Car and counterweight guide rails and guide fastenings shall conform to the requirements of subsections 3030(b), 3030(j) and 3106(a)(1), (2).
(Title 24, Part 7, Section 7-3093.22)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.23. Buffers and Buffer Supports.
(a) The car and counterweight shall be provided with spring buffers so designed and installed that they will not be fully compressed when struck by car with its rated load and speed or by the counterweight traveling at 125% of the rated speed, or at governor tripping speed where a governor-operated safety is used.
(b) Car and counterweight-buffer supports shall be of sufficient strength to withstand without failure the impact resulting from buffer engagement at 125% of the rated speed, or at governor tripping speed where a governor-operated safety is used.
(Title 24, Part 7, Section 7-3093.23)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.24. Overhead Machinery Beams and Supports.
(a) All machinery and sheaves shall be so supported and secured as to prevent any part from becoming loose or displaced.
(b) Beams supporting machinery shall be of steel, sound timber or reinforced concrete.
(c) Overhead beams and their supports shall be designed for not less than the sum of the following:
(1) The load resting on the beams and their supports which shall include the complete weight of the machine, sheaves, controller and any other equipment supported thereon.
(2) Two times the sum of the tension on all suspension ropes or chains.
(Title 24, Part 7, Section 7-3093.24)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.25. Material for Sheaves and Drums and Minimum Diameter.
(a) Winding drums, traction sheaves, and overhead and deflecting sheaves shall be of cast iron or steel and of a diameter of not less than 30 times the diameter of the wire suspension means. The rope grooves shall be machined and designed to conform with the requirements of subsection 3038(b).
Exception to subsection 3093.25(a): Where 8 x 19 steel ropes or 7 x 19 aircraft cable are used, the required minimum diameter of drums and sheaves may be reduced to 21 times the diameter of the rope.
(b) The factor of safety, based on the static load (the rated load plus the weight of the car, ropes, counterweights, etc.) to be used in the design of the driving machine and sheaves shall be not less than 8 for wrought iron and steel, and 10 for cast iron, cast steel and other metals.
(Title 24, Part 7, Section 7-3093.25)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.26. Fastening of Driving Machines and Sheaves to Underside of Overhead Beams.
(a) Overhead driving machines or sheaves shall not be fastened to the underside of the supporting beams. E xception to subsection 3093.26(a): Idlers or deflecting sheaves including the guards and frames.
(b) Cast iron in tension shall not be used for supporting idler and deflections sheaves where they are hung beneath the beams.
(Title 24, Part 7, Section 7-3093.26)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.27. Factor of Safety for Overhead Beams and Supports.
The factor of safety for overhead beams and supports based on ultimate strength of material shall not be less than 5 for steel, and 6 for timber and reinforced concrete.
(Title 24, Part 7, Section 7-3093.27)

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

s 3093.28. Hydraulic Driving Machine.
Hydraulic Driving Machines shall conform to the requirements of Section 3067. E xception to Section 3093.28: Roped-hydraulic machines may be used. (continued)