(a) Enclosures.
The manlift shall be located in an enclosure protected by a
self-closing, self-locking door or gate at each landing located in the
same relative position except where building layout prevents identical
location. Corners of gates shall be rounded.
EXCEPTION: The enclosure may be omitted at landings
accessible only to plant personnel trained to use the manlift in the
performance of their duties within the plant when guards described in
3097(e)(1)(A) and (B) are provided.
(1) The enclosure shall be not less than 6
feet high and of substantial material that will, if of openwork, reject a
2-inch ball.
(2) Keys to allow
access to the manlift shall be issued to authorized personnel only.
(3) Doors or gates shall be arranged to be
opened from the manlift side without use of a key.
(4) Doors or gates shall be located in the
enclosure so that they are not in line with the floor openings for the
manlift.
(5) Visitor Warning
Requirements. A conspicuous sign having the following legend:AUTHORIZED
PERSONNEL ONLY
shall be displayed at each landing. Sign shall be of
block letters not less than 2 inches in height and shall be of a color offering
high contrast with the background color.
(b) Floor Openings. All floor openings
through which the steps of a manlift pass shall be uniform in size, located
vertically in line, and shall conform to the following:
(1) The clearance between the floor opening
and side of the step, measured parallel with the plane of the belt, shall be
not less than 7 inches nor more than 9 inches.
(2) The clearance between the front edge of
the step and the edge of the floor opening, measured at the center line of the
step, shall be not less than 14 inches nor more than 15 inches.
(3) The radius of curvature at the corners of
the floor openings shall be approximately 15 inches.
(c) Landings.
(1) The clearance between the floor or
mounting platform and the lower edge of the conical guard above it required by
Section
3097(d) shall be
not less than 7 feet 6 inches. Where this clearance cannot be obtained, no
access to the manlift shall be provided and the manlift runway shall be
enclosed when it passes through such floor.
(2) The landing area and access route to the
manlift shall be kept clear at all times.
(3)
The landing surfaces at the
entrances and exits to the manlift shall be so constructed and maintained as to
provide safe footing at all times.
(Coefficient of friction of not less than
0.5.)
(4) Emergency landings
shall be provided as follows:
(A) Where there
is a travel of 50 feet or more between floor landings, one or more emergency
landings shall be provided so that there will be a landing (either floor or
emergency) for every 25 feet or less of manlift travel.
(B) Such emergency landings shall be
accessible from both runs of the manlift and shall be constructed to meet the
requirements of the floor landings.
(C) Emergency landings shall be completely
enclosed with a standard railing and toeboard and shall give access to the
ladder required in Section
3097(i).
(d) Floor Opening Guards.
(1)
On the ascending side of the
manlift, all landings shall be provided with a bevel guard or cone
meeting the following requirements:
(A) The
cone shall make an angle of not less than 60 degrees with the horizontal. An
angle of less than 60 degrees but not less than 45 degrees may be used where
ceiling heights do not allow the clearance required by Section
3097(c).
(B) For Manlifts installed prior to 1988, the
guard shall extend not less than 36 in.(0.914m) outward from the face of the
belt, measured at the center line of the belt. For Manlifts installed after
Jan. 1, 1988, the guard shall extend not less than 42 in.(1.57m) outward from
the face of the belt, measured at the center line of the belt.
(C) The cone shall be made of not less than
No. 18 M.S. gage steel or material of equivalent strength or stiffness. The
lower edge shall be rolled to a minimum diameter of ½ inch and the
interior shall be smooth with no rivets, bolts, or screws
protruding.
(2) In lieu
of the fixed guards specified in Section
3097(d)(1),
floating type safety cones may be used. Such floating cones are to be mounted
on hinges at least 6 inches below the underside of the floor and so constructed
as to actuate a limit switch should a force of 2 pounds be applied on the edge
of the cone closest to the hinge. The depth of this floating cone need not
exceed 12 inches.
(e)
Protection of Entrances and Exits to Steps.
(1)
The entrance and exit to the
manlift shall be arranged so the landing area extends not less than 2
feet nor more than 3 feet from the edge of the floor opening to the
runway enclosure, measured perpendicular to the plane of the manlift belt.
Where the enclosure is more than 3 feet from the edge of the floor opening, or
where the enclosure is not required by Section
3097(a), the
following additional guards shall be required:
(A) A standard guardrail located so the
landing area extends not less than 2 feet nor more than 3 feet from the edge of
the floor opening to the guardrail, measured perpendicular to the plane of the
belt and
(B) Standard guardrails
parallel to the side guards required by Section
3097(f) and
forming, with the side guards, a maze type entrance to the landing area of the
manlift.
(2)
Additional guardrails or partitions shall be required whenever
arrangements are such that the loading and unloading can be done from
the side of the manlift step or when access to the landing area or
floor opening is direct rather than by a definite guided indirect
route.
(3) The combination
of side guards, enclosures, and guardrails shall be arranged to minimize the
hazard of debris or materials falling down the runway for the
mainlift.
(f) Side Guards
for Openings.
(1) In order to preclude side
loading, the floor opening at each landing shall be guarded on the open sides
by panels of not less than No. 13 M.S. gage flattened expanded metal to reject
a 1-inch ball in a frame of angle iron or pipe.
(2) The side guard shall be not less than 6
feet high and of a length so that the end posts are located at least to the
ends of the manlift step but not more than 4 inches beyond the step.
(3) The side guards shall be located not more
than 4 inches from the sides of the floor openings.
(4) Both ends of the side guards shall be
equipped with a handle projecting approximately 4 inches from the end post in
the direction away from the plane of the belt. The handle shall have closed
ends rounded to the end post of the side guard and shall extend from
approximately 3 feet to 5 ½ feet above the floor.
(5) The top ends of the side guards shall be
rounded where the top and end posts meet.
(g) Bottom Arrangement.
(1) At the bottom landing the clear area
shall be not smaller than the area enclosed on the floors above, and any wall
in front of the down-running side of the belt shall be not less than 48 inches
from the face of the belt. This space shall not be encroached upon by stairs or
ladders.
(2) The side guards and
handholds shall be installed at approximately the same location as on the
floors above.
(3) The lower (boot)
pulley shall be installed so that it is supported by the lowest landing served.
Pits are not permitted.
(4) A
mounting platform or floor shall be provided in front of the up-run at the
lowest landing, at or above the point at which the upper surface of the
ascending step assumes a horizontal position.
(A) The clearance between the edge of the
floor or mounting platform and the ascending step shall be approximately the
same as the clearance between the floor opening and the step at the floors
above.
(B) The top surface of the
mounting platform shall extend the entire distance between side guards and
shall be not less than 14 inches deep.
(h) Top Arrangement.
(1) Top Arrangements-Clearance from Floor. A
top clearance shall be provided at least 11 feet above the top terminal
landing. This clearance shall be maintained from a plane through each face of
the belt to a vertical cylindrical plane having a diameter 2 feet greater than
the diameter of the floor opening, extending upward from the top floor to the
ceiling on the up-running side of the belt. NO encroachment of structural or
machine supporting members within this space shall be permitted.
(2) The top pulley shall be located so:
(A) There shall be a clearance of at least 5
feet between the center of the head pulley shaft and any ceiling
obstruction.
(B) The center of the
head pulley shaft shall be not less than 6 feet nor more than 9 feet above the
top terminal landing.
(3)
On the up-running side of the manlift, an emergency ladder shall be provided
adjacent to one of the side guards. The top rung of the ladder shall be located
approximately 6 feet above the floor and side rails of the ladder shall extend
not less than 3 ½ feet above the top rung. The supporting member of the
side guard may be used as one of the side rails of the ladder.
(4) On the up-running side of the manlift,
rails shall be provided extending from the top of each side guard on a radius
to a point approximately 3 feet above the center line of the head pulley. These
rails may be extensions of the supporting members of the side guards and may be
carried over in a semicircle.
(i) Emergency Exit Ladders.
(1)
A fixed metal ladder accessible
from both the "up" and "down" run of the manlift shall be provided where the
vertical distance between landings exceeds 20 feet.
EXCEPTION: Manlifts installed before June 5,
1947.
(2) Such ladder shall
be in accordance with the regulations of Section
3277, Article 4, of Title 8, CAC
(General Industry Safety Orders) for ladders, except that enclosing cages shall
not be provided.
(A) Manlift supporting
members may be used as side rails if desired.
(j) Illumination.
(1) Both runs of the manlift shall be
illuminated at all times when the lift is in operation. An intensity of not
less than 1 foot-candle, measured at the belt, shall be provided for the entire
runway and shall illuminate the warning signs required by Section
3099(i)(2).
(2) Lighting of manlift runways shall be by
means of circuits permanently tied into the building circuits (no switches), or
shall be arranged to be turned on by the starting switch controlling the
manlift motor, or shall be controlled by switches at each landing. Where
separate switches are provided at each landing, any switch shall turn on all
lights necessary to illuminate the entire runway. Where the runway lighting is
turned on by the starting switch controlling the manlift motor, the lighting
for the floor landings shall be controlled by other means.
(3)
Adequate lighting, not
less than 5-foot candles, measured at the landing area, shall be
provided at each floor landing.
(4) A light and convenience outlet shall be
provided in each machine room or controller space.
(5) A red warning light of not less than
40-watt rating shall be provided immediately below the upper landing terminal
and so located as to shine in the passenger's face.
(k) Electrical Wiring and Equipment.
(1) Wiring and electrical equipment for the
manlift shall comply with the regulations of CCR, Title 24,
Part 3, Article
620.
(2) The disconnect means shall
be located adjacent to the motor controller and shall be arranged to be locked
in the open position.
(3) Two motor
starting switches are required, arranged so that if either switch should be
mechanically held in the closed position the other switch shall break the
circuit to the drive motor and automatic brake when any of the up limit stops
or the stopping device are actuated.
(4) The motor controller shall be located
within the top landing enclosure for the manlift.
(l) Access to and Work Space for Machinery.
(1)
An adequate platform shall be
provided for serving or repairing the drive machinery.
(A)
All open sides of work platforms
30 inches or more above floor level shall be guarded by a standard rail and
toeboard.
(b)
Access to work platforms shall be by means of a permanent ladder or
stairs.
(2)
Moving equipment shall be guarded against accidental
contact.
(m)
Weather Protection. The entire manlift and its driving mechanism shall be
protected from the weather at all times.
FIGURE 3097-A
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here to view image
FIGURE 3097-B
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here to view image
(Title 24, Part 7, Section
7-3097)