(a) Tower or Mast Construction.
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 counterweights.
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.
(3) Design.
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 ½ -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.
Notes
Cal. Code Regs. Tit. 8, §
1604.5
1.
Amendment of subsection (c)(3) and new NOTE filed 1-28-2003; operative
2-27-2003 (Register 2003, No. 5).
Note: 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).