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The tower or mast construction forming the supports for the machinery and guide members shall be designed and installed to support the load and forces specified.
(b) Protection of Spaces Below Hoistways.
Where the space below the hoistway is used for a passageway or is occupied by persons or, if unoccupied, is not secured against unauthorized access, the following requirements shall be met:
(1) Hoist counterweights shall be provided with a Type A or B,
or rack and pinion safety. Broken-rope type safeties may be provided on car
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 counterweights falling their maximum distance, no safety device need be provided.
(2) The cars and counterweights shall be provided with spring or oil buffers conforming to the following:
(A) Spring or oil buffers shall conform with Section 1604.14.
(B) Spring buffers for hoists shall be so designed and installed that they will not be fully compressed when struck by the car with its rated load and by the counterweight at governor-tripping speed where the safety is governor-operated and at 125% of rated speed where the safety is not governor-operated.
(3) Car and counterweight buffer supports shall be of sufficient strength to withstand without permanent deformation the impact resulting from buffer engagement at governor-tripping speed where the safety is governor-operated and at 125% of rated speed where the safety is not governor-operated.
(c) Hoistway Enclosures.
(1) Hoists Located Outside of Structures.
For hoists located outside of structures, the enclosures, except those at the lowest landing, may be omitted on the sides where there is no floor or scaffold adjacent to the hoistway. Enclosures on the building side of the hoistway shall be full height or a minimum of 8 feet at each floor landing. Enclosure at the pit shall be not less than 8 feet on all sides.
(2) Hoists Located Inside of Structures.
For hoists located inside of structures, the hoistway shall be enclosed throughout its height.
Hoistway enclosures shall be so supported and braced that when subjected to a pressure of 100 pounds applied horizontally at any point, the deflection shall not exceed 1 inch and shall not reduce the running clearance below the minimum required in Section 1604.11(a).
Hoistway enclosures, if of openwork, shall be provided on all sides within the building or structure with an unperforated kickplate extending not less than 12 inches above the level of each floor above the lowest.
(d) Hoist Structure.
(1) Hoists shall be supported by a firm foundation of such dimensions as to adequately distribute the transmitted load so as not to exceed the safe load bearing capacity of the ground upon which such hoists are erected.
(2) Each hoist structure shall be anchored to the building or other structure at vertical intervals not exceeding 30 feet. Where the building or other structure is of such character that tie-ins cannot be made, the hoist structure shall be guyed by means of a suitable number of guys. Such guys shall be fastened to adequate anchorages to ensure hoist structure stability. When wire rope is used for guys, the rope shall be at least 1/2-inch in diameter.
(3) Tie-ins shall conform to, or be equal to, the manufacturer's specifications and shall remain in place until the tower or mast is dismantled.
(4) The free-standing portion of the hoist structure shall be in accordance with manufacturer's specifications.
(5) Cars in multiple hoistways are prohibited when one or more cars are designed according to the requirements of Section 1605.9 for material hoists.
(6) Each personnel hoist shall be independently powered and operated.
(7) Booms shall be prohibited on hoists and structures.
Exception: Booms used to erect rack and pinion towers.
(e) Erection and Dismantling.
Personnel and building materials connected with, or related to, the building project may not be moved by the hoist while erection, dismantling or inspection of the hoist are taking place.
Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. Amendment of subsection (c)(3) and new Note filed 1-28-2003; operative 2-27-2003
(Register 2003, No. 5).