(a) Machines.
(1)
Machines shall be of the direct
connected type or shall be driven by multiple V-belts. Cast iron gears shall
not be used.
(2) Drive
(head) pulleys and idler (boot) pulleys shall have a diameter not less than
given in Table 3099.TABLE 3099
Belt
Construction |
Minimum Strength (Lb. Per
Inch of Width) |
Minimum Pulley Diameter
(inches) |
|
5
Ply.......................... |
..........................1500 |
|
20 |
|
6
Ply......................... |
..........................1800 |
|
20 |
|
7
Ply.......................... |
..........................2100 |
|
22 |
(The above values are based on 32 ounce duck; 300
pounds per linear inch per ply.)
(3) The machine shall be so designed and
constructed as to catch and hold the driving pulley in event of shaft
failure.
(4) All parts of the
machine shall have a factor of safety of 6 based on a static load of 200 pounds
on each horizontal step on the up and down runs.
(b) Brakes.
(1)
An inherently self-engaging brake
requiring power or force from an external source to cause
disengagement
that applies automatically when the circuit to the drive
motor is opened shall be provided on every manlift.
(A)
The brake shall be electrically
released and shall be applied to the motor shaft for direct connected
units.
(B)
No belt
or connecting means, other than a direct mechanical connection shall exist
between the brake and the head pulley on belt driven
units.
(2) A
mechanically applied brake that will apply should the pulley speed exceed 125
percent of rated speed or should the direction of rotation of the head pulley
be reversed shall be on every manlift.
(A)
This brake shall be applied directly to the head pulley or to the head pulley
shaft at the side opposite the driving means.
(B) The power to the drive motor shall be
automatically disconnected at or before the time the brake sets and shall
remain disconnected until the brake or disconnecting means is manually
reset.
(3) Either brake
required by Section
3099(b)(1) and
Section
3099(b)(2) shall
be capable of stopping and holding the manlift when the descending side is
loaded with 250 pounds on each step.
(4)
The automatic brake required by
Section 3099(b)(1) shall
be capable of stopping the manlift within not more than 12 inch travel after an
up limit stop device has been actuated.
(c) Belts.
(1) The belt shall be of hard-woven canvas,
rubber-coated canvas, leather, or other material meeting the strength
requirements of Section
3099(c)(3) and
having a coefficient of friction such that when used in conjunction with an
adequate tension device it will meet the brake test specified in Section
3099(b)(3).
(2) The width of the belt shall be not less
than:
Total Rise in Feet
|
Belt Width in Inches |
Less than
100.......................... |
..........................
12 |
|
100 to
150.......................... |
..........................
14 |
|
More than
150.......................... |
..........................
16 |
|
(3) The strength of the belt shall be not
less than:
Total Rise in Feet
|
Strength in Pounds Per Inch Width |
Less than
100.......................... |
.......................... 1500 |
|
100 to
200.......................... |
.......................... 1800 |
|
More than
200.......................... |
.......................... 2450 |
|
(4)
Belts shall be fastened by a
lapped splice or shall be butt-spliced with a strap on the side away from the
pulley.
(A) For lapped splices, the
overlap of the belt at the splice shall be not less than 3 feet where the total
travel of the manlift does not exceed 100 feet, and not less than 4 feet if the
travel exceeds 100 feet.
Where butt splices are used, the strap shall extend not
less than 3 feet on each side of the butt for a travel not in excess of 100
feet, and 4 feet for a travel in excess of 100 feet.
(B) Splices shall be fastened with special
elevator bolts arranged to cover the splice area effectively. These bolts shall
have a minimum diameter of ¼ inch and conform to the following:
|
|
Minimum Number of
Bolts |
Belt Width |
Lap Splice |
Butt Splice |
|
12".......................... |
..........................20 |
|
40 |
|
14".......................... |
..........................23 |
|
46 |
|
16".......................... |
..........................27 |
|
54 |
(5) A belt that has become torn while in use
on a manlift shall not be spliced and put back in service.
(d) Speed.
(1)
The rated speed of a manlift
shall not exceed 80 feet per minute.
To take care of variations in voltage, etc., the actual
noload running speed of the belt may exceed rated speed by not more than 10
percent.
(2) All manlifts in
a given plant should run at approximately the same speed.
(e) Platforms or Steps.
(1) Steps or platforms shall be not less than
12 inches nor more than 14 inches deep, measured from the belt to the edge of
the step or platform.
(2) The width
of the step or platform shall be not less than 17 inches nor more than 21
inches.
(3) The distance between
steps shall be equally spaced and not less than 16 feet measured from the upper
surface of one step to the upper surface of the next step above it.
(4) The surface of the step shall be
approximately level.
(5) Surface of
the step shall be of a nonslip material.
(6) When subjected to a load of 400 pounds
applied at the approximate center of the step, step frames or supports and
their guides shall be of adequate strength to:
(A) Prevent the disengagement of any step
roller.
(B) Prevent any appreciable
misalignment.
(C) Prevent any
visible deformation of the step or its support.
(7)
No step shall be provided unless
there is a corresponding handhold above or below it meeting the requirements of
Section 3099(f). If a step
is removed for repairs or permanently, the handholds immediately above and
below it shall be removed before the lift is again placed in
service.
(f)
Handholds.
(1)
Handholds attached to
the belt shall be provided and so installed that they are not less than 4 feet
nor more than 4 feet 8 inches above the step tread. These shall be so located
as to be available on both the "up" and "down" run of the
belt.
(2) The grab surface
of the handhold shall be not less than 4 ½ inches in width, not less
than 3 inches in depth and shall provide 2 inches of clearance from the belt.
Fastenings for handholds shall not come within 1 inch of the edge of the
belt.
(3) The handhold shall be
capable of withstanding without damage a load of 300 pounds applied parallel to
the run of the belt.
(4)
No
handhold shall be provided without a corresponding step. If a handhold is
removed permanently or temporarily, the corresponding step and handhold for the
opposite direction of travel shall also be removed before the lift is again
placed in service.
(5)
All handholds shall be of the closed type.
EXCEPTION:
1.
Existing installations where the same handhold is used for both
directions.
2. Existing
installations where a belt flat arrangement is
provided.
(g)
Up Limit Stops.
(1) Two separate automatic
stop device shall be provided to cut off the power and apply the brake when a
loaded step passes the upper terminal landing.
(A) One of these devices shall consist of two
switches each actuated by the deflection of a step roller due to a load on the
step traveling above the top floor and arranged to stop the manlift should one
or both of the switches be actuated. Each rail shall be provided with a switch
located so that the device will function when the surface of the step is not
more than 12 inches above the top landing.
(B) The second device shall be a switch
actuated by a lever, rod, or plate located above the center line of the head
pulley but projecting over the ascending steps so as to just clear a passing
step. The lever, rod, or plate shall be not more than 10 ½ feet above
the top landing.
(2)
After the manlift has been stopped by an up limit stop, it shall be
necessary to reset the device manually.
(3) After resetting an up limit stop, it
shall be necessary to start the manlift by a restart button so located at the
top landing as to provide a clear view of both up limit stops.
(4) Existing manlifts shall be provided with
an automatic limit stop which will shut off the power and stop the belt if any
passenger rides a step more than 12 inches above the upper
landing.
(h)
Starting and Stopping Device.
(1)
A manually operated starting and
stopping device shall be provided.
(2)
This device shall be within easy
reach of the ascending and descending runs of the belt.
(3)
The starting and stopping means
shall be so connected with the control lever or operating mechanism that it
will cut off the power and apply the brake when pulled in the direction of
travel.
(4) This stop
shall consist of a cotton rope with a wire center, manila or sisal rope, marlin
covered wire rope, or synthetic fiber, not less than 3/8 inch in
diameter.
(5)
Where a
spring is used to maintain rope tension, the rope connection shall be made in
such a manner that failure of the spring will not disconnect the operating
rope.
(i)
Instruction and Warning Signs.
(1)
Signs of conspicuous and easily read style, giving instructions for the
use of the manlift, shall be posted at each landing or stenciled on the
belt.
(A) Such signs shall be of
letters not less than 1 inch in height and of a color having high contrast with
the surface on which it is stenciled or painted (white or yellow on black or
black on white or gray).
(B) The
instructions shall read approximately as follows:
"Face the Belt."
"Use the Handhold."
"To Stop--Pull Rope in Direction of
Travel."
(2) At
the top floor, illuminated signs shall be displayed bearing the following
wording:
"Top Floor--Get Off."
(A) Signs shall be in block letters not less
than 2 inches in height.
(B) A sign
shall be located on the inside of each side guard on front loading manlifts and
not more than 2 feet above the floor at the top landing.
(C) A sign shall be located just before
reaching the top landing of side loading manlifts, readily visible when facing
the side used for unloading.
(3) At the approach to the bottom floor, an
illuminated sign shall be displayed bearing the following wording:
"Bottom Floor--Get Off."
(4) On existing installations, illuminated
warning signs shall be displayed at points before reaching the top and bottom
landings.
(j) Carrying of
Materials and Tools.
(1)
No freight or
packaged goods shall be carried on any manlift.
(2)
No pipe, lumber, or other
construction material shall be handled on any manlift.
(3)
No tools except those which will
fit entirely within a pocket in usual working clothes shall be carried on any
manlift except that tools may be carried inside a canvas bag having
dimensions not larger than 11 inches by 13 inches and provided with carrying
loops or handles. Such bag shall be provided with a leather bottom. Such bag
shall not be provided with shoulder straps but shall be carried in the
passenger's hand while he is riding the manlift.
(k) Periodic Inspections.
(1) Periodic Inspection Frequency. All
manlifts shall be inspected by a competent designated person at intervals of
not more than 30 days. Limit switches shall be checked weekly. Manlifts found
to be unsafe shall not be operated until properly repaired.
(2) Items Covered. This periodic inspection
should cover all portions of the manlift and the immediate area around the
manlift including but not limited to the following items:
Steps.
Step Fastenings.
Rails.
Rail Supports and Fastenings.
Rollers and Slides.
Belts and Belt Tension.
Handholds and Fastenings.
Floor Landings.
Guardrails.
Lubrication.
Limit Switches.
Warning Signs and Lights.
Illumination.
Drive Pulley.
Bottom (boot) Pulley and Clearance.
Pulley Supports.
Motor.
Driving Mechanisms.
Brake.
Electrical Switches.
Vibration and Misalignment.
"Skip" on up or down run when mounting step.
(Indicating worn gears)
(3)
Inspection Record. A certification record shall be kept of each inspection
which includes the date of the inspection, the signature of the person who
performed the inspection and the serial number, or other identifier, of the
manlift which was inspected. Records of inspection shall be made available to
the division.
(l) Design
Requirements. All new manlift installations and equipment installed after the
effective date of these regulations shall meet the strength of materials
requirements of the "American National Safety Standard for Manlifts ANSI
A90.1-1969" and the requirements of this section.
(m)
Beams and Supports Required.
Machines, machinery, rails and pulleys shall be so supported and maintained in
place as to effectually prevent any part from becoming loose or displaced under
the conditions imposed in service.
(n)
Out-of-Service Requirements. When
it is intended to remove a manlift from service for an extended period of time,
the leads to the disconnecting switch shall be disconnected and taped, the
drive pulley and belt shall be restrained to prevent movement of the belt and
the floor openings shall be covered over with plywood not less than 3/4" thick
fastened in place.
(o)
Guarding.
Guarding of mechanical equipment and floor openings shall
conform to the requirements of Subchapter 7, Chapter 4, Part 1 of Title 8
(General Industry Safety Orders) of the California Administrative
Code.
(Title 24, Part 7, Section
7-3099)
Notes
Cal. Code Regs. Tit. 8, §
3099
1.
Amendment of subsections (b)(1), (f)(2), and add subsections (c)(5), (k), and (
l), filed 8-30-74; effective thirtieth day thereafter (Register 74, No.
35).
2. Amendment of subsection (b)(1) filed 9-12-74; effective
thirtieth day thereafter (Register 74, No. 37).
3. New subsections
(m), (n) and (o) filed 6-23-77; effective thirtieth day thereafter (Register
77, No. 26).
4. Amendment filed 6-12-87; operative 7-12-87 (Register
87, No. 26).
5. Amendment of subsection (k)(3) filed 3-5-90;
operative 4-4-90 (Register 90, No. 12).
Note: Authority cited: Section
142.3, Labor
Code. Reference: Section
142.3, Labor
Code.
1. Amendment of
subsections (b)(1), (f)(2), and add subsections (c)(5), (k), and ( l), filed
8-30-74; effective thirtieth day thereafter (Register 74, No. 35).
2. Amendment of subsection (b)(1) filed 9-12-74; effective thirtieth day
thereafter (Register 74, No. 37).
3. New subsections (m), (n) and
(o) filed 6-23-77; effective thirtieth day thereafter (Register 77, No.
26).
4. Amendment filed 6-12-87; operative 7-12-87 (Register 87,
No. 26).
5. Amendment of subsection (k)(3) filed 3-5-90; operative
4-4-90 (Register 90, No. 12).
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.