(a) Bottom Car
Clearances.
(1) When the car rests on its
fully compressed buffer, there shall be a vertical clearance of not less than 2
ft (610mm) between the pit floor and the lowest structural or mechanical part,
equipment, or device installed beneath the car platform except guide shoes or
rollers, safety jaw assemblies, and platform aprons, guards, or other equipment
located within 12 in. (305mm) horizontally from the sides of the car
platform.
(2)
When the car
rests on its fully compressed buffer, no part of the car or any equipment
attached thereto shall strike any part of the pit or any part of the equipment
located therein.
(b) Bottom Runby for Counterweighted
Elevators. The bottom runby of cars and counterweights shall be not less than
the following:
(1) Where oil buffers are used,
6 in. (152mm).
EXCEPTIONS to subsection
3017(b)(1):
Where existing difficulties on modernization jobs
prevent a sufficient pit depth or top clearance on the counterweights, the
runby may be eliminated so that the buffers are compressed by amounts not to
exceed 25 percent of their stroke when the car floor is level with the terminal
landing.
(2) Where spring
buffers are used:
(A) 6 in. (152mm) where
generator-field control is used.
(B) Where rheostatic or alternating current
control is used, not less than the following:
Rated Speed In Feet Per
Minute |
Runby in Inches |
Not over
25.......................... |
..........................3 |
26 to
50.......................... |
..........................6 |
51 to
100.......................... |
..........................9 |
101 to
200.......................... |
..........................12 |
GENERAL NOTE:
1fpm=5.08 E -03 m/s
1in. =25.4mm
(c) Bottom Runby for Uncounterweighted
Elevators. The bottom runby for uncounterweighted elevators shall be not less
than the following:
(1) 3 in. (76mm) where the
rated speed does not exceed 25 fpm (0.127 m/s).
(2) 6 in. (152mm) where the rated speed
exceeds 25 fpm (0.127m/s).
(d) Maximum Bottom Runby.
In no case
shall the maximum bottom runby exceed the following:
(1)
24 in. (610mm) for
cars.
(2)
36 in. (924mm)
for counterweights.
(e) Top Car Clearance for Counterweighted
Elevators. The top car clearance shall be not less than the sum of the
following four items:
(1) The bottom
counterweight runby.
(2) The stroke
of the counterweight buffer used.
(3) 2 ft (610mm) or the distance which any
sheave or any other equipment mounted in or on the car crosshead projects above
the top of the car crosshead, whichever is greater.
(4) One-half the gravity stopping distance
based on:
(A) 115 percent of rated speed where
counterweight oil buffers are used. Where provision is made to prevent the jump
of the car at counterweight buffer engagement, this figure need not be more
than 18 in. (457mm) where the gravity slow down distance is greater than 36 in.
(914mm).
(B) Governor tripping
speed where counterweight spring buffers are
used.
(f) Top
Car Clearance for Uncounterweighted Elevators. The top car clearance shall be
not less than the greater of the following:
(1) 36 in. (914mm).
(2) 12 in. (305mm) plus the amount which any
equipment mounted on the car crosshead, or above the car top when no crosshead
is provided, projects vertically more than 2 ft (610mm) above the crosshead or
top.
(g) Vertical
Clearances With Underslung Car Frames. Where an underslung car frame is used,
the clearance between the car rope hitches or car sheaves and any obstruction
in the hoistway vertically above them, when the car floor is level with the top
terminal landing, shall be not less than the following:
(1) Where no counterweight is used, 9 in.
(229mm).
(2) Where a counterweight
is used, the sum of the following four items.
(A) The bottom counterweight runby.
(B) The stroke of the counterweight buffer
used.
(C) 6 in. (152mm).
(D) One-half the gravity stopping distance
based on:
1. 115 percent of rated speed where
counterweight oil buffers are used.
2. Governor tripping speed where
counterweight spring buffers are used.
(h) Top Counterweight Clearances.
The top counterweight clearances shall be not less than
the sum of the following four items.
(1) The bottom car runby.
(2) The stroke of the car buffer
used.
(3) 6 in. (152mm).
(4) One-half the gravity stopping distance
based on:
(A) 115 percent of rated speed where
car oil buffers are used and no provision is made to prevent the jump of the
counterweight at car buffer engagement.
(B) Governor tripping speed where spring car
buffers are used.
(i) Overhead Clearances Where Overhead Beams
Are Not Over Car Crosshead. Where overhead beams or other overhead hoistway
construction are located vertically over the car, but not over the crosshead,
the following requirements shall be met:
(1)
The clearance from the car top to such beams or construction, including
sheaves, when the car floor is level with the top terminal landing, shall be
not less than the distance specified in Sections
3017(e) and
3017(f).
(2) The clearance above an imaginary plane,
drawn even with the top of the car crosshead, to the underside of such beams or
construction, except sheaves, shall be not less than 2 ft (610mm) when the car
is level with the top terminal landing.
(3) When the clearance above the imaginary
plane, drawn even with the top of the car crosshead, is less than the distance
specified in Section
3017(e) or Section
3017(f), such
beams or construction, except sheaves, shall be located not less than 2 ft
(610mm) horizontally from the edge of the car crosshead.
(j) Equipment on Top of Car Not Permitted to
Strike Overhead Structure.
The clearance above any auxiliary equipment
mounted to project above the top of the car shall be not less than the sum of
the following three items when the car platform is level with the top
landing:
(1) The bottom counterweight
runby.
(2) The stroke of the
counterweight buffer used.
(3)
One-half the gravity stopping distance based on:
(A) 115 percent of rated speed where
counterweight oil buffers are used. Where provision is made to prevent the jump
of the car at counterweight buffer engagement, this figure need not be more
than 6 in. (152mm).
(B) Governor
tripping speed where counterweight spring buffers are used.
EXCEPTION to subsection
3017(j)(3)(B):
Elevators installed before June 5,
1947.
(k) Minimum Top Clearance.
(1) Elevators installed before June 5, 1947,
shall have the ropes adjusted so that the car or counterweight will rest upon
the bumpers or buffers fully compressed before the counterweight or the car is
vertically within 1 ft (305mm) of any part of the construction over the
hoistway and before any equipment mounted on the car or counterweight will
strike any structure or equipment in the hoistway.
(2) Elevators installed since June 5, 1947,
shall have the ropes adjusted to maintain the top car clearance required by
Section
3017(e), the top
counterweight clearance required by Section
3017(h), and the
bottom runby required by Section
3017(b).
(3) The top car clearance shall be not less
than 3 ft (914mm) on any elevator.
(4) The clearance from the raised guardrails
required by Section
3034(a)(9) to the
overhead structure shall be not less than 18 in. (457mm) when the counterweight
is on its fully compressed buffer.
(Title 24, Part 7, Section
7-3017.)
Notes
Cal. Code Regs. Tit. 8, §
3017
1. New
subsection (k)(4) filed 10-25-74; effective thirtieth day thereafter (Register
74, No. 43).
2. Amendment of subsection (e)(4) filed 6-23-77;
effective thirtieth day thereafter (Register 77, No. 26).
3.
Amendment of subsection (k)(4) filed 12-22-78; effective thirtieth day
thereafter (Register 79, No. 1).
4. Amendment filed 6-23-87;
operative 6-23-87 (Register 87, No. 27).
5. Editorial corrections
(Register 95, No. 26).
Note: Authority cited: Section
142.3, Labor
Code. Reference: Section
142.3, Labor
Code.
1. New subsection
(k)(4) filed 10-25-74; effective thirtieth day thereafter (Register 74, No.
43).
2. Amendment of subsection (e)(4) filed 6-23-77; effective
thirtieth day thereafter (Register 77, No. 26).
3. Amendment of
subsection (k)(4) filed 12-22-78; effective thirtieth day thereafter (Register
79, No. 1).
4. Amendment filed 6-23-87; operative 6-23-87 (Register
87, No. 27).
5. Editorial corrections (Register 95, No.
26).
Group II regulations apply to existing elevators installed
prior to October 25, 1998. Italicized paragraphs, sentences, or phrases apply
to all existing elevators while non-italicized apply to elevators installed
after 1970 or after the date the regulation was
adopted.