§ 3091. Design Requirements.
8 CA ADC § 3091Barclays Official California Code of Regulations
Barclays California Code of Regulations
Title 8. Industrial Relations
Division 1. Department of Industrial Relations
Chapter 4. Division of Industrial Safety
Subchapter 6. Elevator Safety Orders
Group II. Elevator Installations for Which the Installation Contract Was Signed Before October 25, 1998 (Refs & Annos)
Article 14. Moving Walks
8 CCR § 3091
§ 3091. Design Requirements.
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 Slope At Any Point | 90 fpm Max. Treadway Speed | Above 90 to 140 fpm Treadway Speed | Above 140 to 180 fpm Treadway Speed |
0 to 5° | Unrestricted | 60 | 40 |
above 5 to 8° | 40 | 40 | 40 |
above 8 to 15° | 40 | 40 | Not permitted |
(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 ¼ 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 ½ inch. Sides of grooves may slope for mold draft purposes and may be filleted at the bottom.
(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 ¼ 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 ½ inch. Sides of grooves may slope for mold draft purposes and may be filleted at the bottom.
(3) The treadway surface of each pallet shall be grooved in a direction parallel to its travel. Each groove shall be not more than ¼ 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 ½ inch. Sides of grooves may slope for mold draft purposes and may be filleted at the bottom.
TABLE 3091H1
Maximum Treadway Slope at Point of Entrance or Exit | Maximum Treadway 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 Any Point on Treadway | Maximum 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.
(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.
(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 exceed 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.
(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 ¼ 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.
(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 ¼ 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 ¼ inch.
(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.
(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.
Exceptions:
(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.
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.
(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.
Credits
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Repealer and new Table 3091C, repealer and new subsection (k), and amendment of subsection (l) and (n)(5) filed 6-23-77; effective thirtieth day thereafter (Register 77, No. 26).
2. Editorial correction of subsection (k)(2) (Register 95, No. 34).
3. Amendment of subsection (k)(1), new subsections (k)(4)-(k)(4)(C) and new Note filed 3-13-2000; operative 4-1-2000 pursuant to Government Code section 11343.4(d) (Register 2000, No. 11).
This database is current through 5/3/24 Register 2024, No. 18.
Cal. Admin. Code tit. 8, § 3091, 8 CA ADC § 3091
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