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The enclosures shall be building walls, ceiling materials and fireproofing conforming to governing building codes. The regulations included in this section establish minimum standards for hoistway enclosures. These regulations are not intended to supersede applicable local building codes establishing higher standards.
(a) Dumbwaiter Hoistway Enclosures. Hoistway and hoistway enclosures shall comply with the following:
(1) Section 3010(a). Enclosures of Hoistways.
(2) Section 3010(b). Strength of Enclosures.
(3) Section 3010(c). Construction at Bottom of Hoistway.
(4) Sufficient overhead clearance shall be provided for reasonable overtravel and final stopping.
EXCEPTION: Dumbwaiters of the undercounter type.
(b) Dumbwaiter Machine Rooms, Machinery Spaces, and Access to Machinery.
(1) The control panels shall be located to conform to the requirements of CCR, Title 24, Part 3, Article 620.
(2) When overhead machines of power dumbwaiters are located within the hoistway, the following regulations shall apply:
(A) The controller shall be located outside the hoistway.
(B) A floor capable of supporting 300 pounds shall be installed below the machine in hoistways over 9 square feet in area.
(C) Access to the machine space shall be provided by means other than the top hoistway landing door.
(D) Access to all parts of the machine shall be provided from the access door, or additional doors, or removable panels shall be installed in the hoistway enclosure for safe and convenient access to the machine.
(E) Access doors shall be not less than 18 inches in the least dimension, nor less than 4 square feet in area, and shall be kept locked.
EXCEPTION: Removable panels shall be provided with an electric contact that will prevent operation of the dumbwaiter when the panel is removed.
(F) Access to the machine space may be by means of a portable ladder provided the bottom of the access door is not more than 8 feet above floor level and the access door is located below the room ceiling line.
(G) Access to the machine space shall be by means of a permanent ladder or stairs when the bottom of the access door is more than 8 feet above floor level or when the access door is located above the room ceiling in an attic or crawl space.
1. Landings at the top of permanent ladders and walkways in attics or crawl spaces shall be provided. The headroom above walkways shall be not less than 4 feet and the walkways shall be provided with permanent electric lighting.
(3) When basement machines of power dumbwaiters are located within the hoistway, the following regulations shall apply:
(A) The controller shall be located outside the hoistway.
(B) The machine space shall be provided with an access door.
(C) The access door shall be not less than 18 inches in its least dimension and shall be kept locked.
(D) The access door shall be provided with an electric contact that will prevent the dumbwaiter from operating with the door open.
(E) Access to overhead sheave spaces shall be provided. The access shall conform to the requirements for access to overhead machines in Section 3078(b)(2) unless the equipment at the top of the hoistway can be serviced safely from the hoistway landing door.
(4) When the machines of power dumbwaiters are located outside the hoistway, either above or at the side, the following regulations shall apply:
(A) Machine rooms or machine enclosures shall be provided conforming to the requirements of machine rooms for elevators in Section 3011 or the machine shall be enclosed with removable panels provided with electric contacts that will prevent the dumbwaiter from operating with the panels removed.
(B) Access to machine rooms or machine enclosures located above the hoistway shall conform to Section 3011(c) except that a permanent ladder may be installed for access to the roof or attic space.
(C) The clear headroom in machine rooms or machine enclosures located outside the hoistway shall be not lss than 6 feet 3 inches.
(5) Handpower dumbwaiter machines may be located inside the hoistway enclosure at the top or bottom without intervening enclosures or platforms.
(c) Electrical Wiring, Pipes, and Ducts in Dumbwaiter Hoistways, Machine Rooms, or Machinery Spaces.
(1) Electrical wiring and equipment in dumbwaiter hoistways, machine rooms, and machinery spaces shall comply with CCR, Title 24, Part 3, Article 620.
(2) The installation of pipes, ducts and wiring shall comply with Section 3012.
(d) Dumbwaiter Machinery and Sheave Beams, Supports, and Foundations. Machinery and sheave beams, supports, and foundations shall comply with the applicable requirements of Section 3015.
EXCEPTION: Hand dumbwaiter machines may be supported by wood beams.
(e) Pits for Dumbwaiters.
(1) Pits are not required for power or hand dumbwaiters; however, sufficient pit and bottom clearance shall be provided for reasonable overtravel and automatic final stopping.
(2) Dumbwaiter pits shall be maintained in reasonably clean and dry condition.
(f) Horizontal Car and Counterweight Clearances. Horizontal car and counterweight clearances shall conform to Sections 3018(a), 3018(b), 3018(c), and 3018(d).
(g) Protection of Spaces Below Hoistways of Dumbwaiters. Where the space below the hoistway is used for a passageway, or is occupied by persons, or if unoccupied is not permanently sealed against access, the following requirements shall be conformed to:
(1) Dumbwaiter cars and their counterweights shall be provided with safeties which may be operated as a result of the breaking of the suspension means and which may be of the inertia type without governors. The safety may be located in the car or counterweight crosshead. See Section 3079 for test requirements.
(2) The cars and counterweights shall be provided with spring buffers. Oil buffers may be used.
(A) Spring buffers shall be so designed and installed that they will not be fully compressed when struck by the car with its rated load at 125 percent of rated speed, or governor tripping speed if a governor is used.
(3) Car and counterweight buffer supports shall be of sufficient strength to withstand without permanent deformation the impact resulting from the condition listed in Section 3078(g)(2)(A).
EXCEPTION: Where it can be demonstrated by recognized engineering calculations, submitted in writing by a qualified engineer, that the structure over the passageway, vault, or other usable space is capable of withstanding the impact of the loaded car or the counterweights falling their maximum distance, no safety device or buffers need be provided.
(h) Protection of Hoistway Landings Openings.
(1) Hoistway landing openings of power dumbwaiters shall be provided with hoistway doors or gates which will fill the full height and width of the openings.
(2) Hoistway landing openings of hand dumbwaiters having a landing sill that is less than 30 inches above the floor level shall be protected by doors or gates which will close automatically when the car leaves the landing. When the doors or gates are arranged so there is no possibility of a shear, these doors or gates may be full automatic.
(3) The width and height of door openings for power dumbwaiters shall not exceed the width and height of the dumbwaiter car by more than 1 inch in each dimension.
EXCEPTION: One door opening may be of sufficient size to permit installing and removing the car, but shall be not more than 4 feet 9 inches in height.
(4) The width of door openings for hand dumbwaiters shall not exceed the width of the car by more than 6 inches, and the maximum height of the opening for any height of car shall be 54 inches.
(5) Hoistway gates shall comply with the applicable portions of Section 3020(c).
(6) Hoistway doors of the horizontal or vertical slide or of the swing-type, shall be located so there is not more than 4 inches from the inside face of the door to the nose of the landing threshold.
(i) Hoistway Door Locking Devices. Hoistway doors or gates of power dumbwaiters shall be equipped with interlocks or combination mechanical locks and electric contacts (contact locks) approved for use on dumbwaiters.
1. Doors or gates of existing dumbwaiters installed with electric contacts provided the landing sill is not less than 30 inches above the floor level.
2. Doors or gates of dumbwaiters installed before June 5, 1947 with approved devices to prevent the operation of the dumbwaiter with any door or gate open.
3. Existing hydraulic dumbwaiters equipped with semi-automatic or full automatic doors or gates.
4. Hoistway doors or gates for dumbwaiters having a capacity of 20 pounds or less and doors or gates not more than 18 inches wide or 24 inches high may be equipped with approved devices to prevent operation of the dumbwaiter with any door or gate open.
(Title 24, Part 7, Section 7-3078)
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. New subsection (h)(6) filed 6-23-77; effective thirtieth day thereafter (Register 77, No. 26).
2. Amendment of Exception within subsection (g)(3) filed 12-22-78; effective thirtieth day thereafter (Register 79, No. 1).
3. Amendment of subsections (b)(1), (c)(1), (i) and Note filed 6-29-94; operative 7-29-94 (Register 94, No. 26).
4. Editorial correction of subsection (b)(2)(F) (Register 95, No. 34).
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