Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) General Requirements. The following
requirements apply to affected parts of buildings which utilize working
platforms for building maintenance:
(1)
Structural supports, tie-downs, tie-in guides, anchoring devices and any
affected parts of the building included in the installation shall be designed
by or under the direction of a professional engineer currently registered in
State of California and experienced in such design;
(2) Exterior installations shall be capable
of withstanding prevailing climatic conditions;
(3) The building installation shall provide
safe access to, and egress from, the equipment and sufficient space to conduct
necessary maintenance of the equipment;
(4) The affected parts of the buildings shall
have the capability of sustaining all the loads imposed by the equipment;
and,
(5) The affected parts of the
buildings shall be designed so as to allow the equipment to be used without
exposing employees to a hazardous condition.
(b) Tie-in Guides.
(1) The exterior of each building shall be
provided with tie-in guides unless the conditions in subsection (b)(2) or
(b)(3) of this section are met.
NOTE: See Figure 1 in Appendix B of this Article for a
description of a typical continuous stabilization system utilizing tie-in
guides.
(2) If angulated
roping is employed, tie-in guides required in subsection (b)(1) of this section
may be eliminated for not more than 75 feet of the uppermost elevation of the
building, if infeasible due to exterior building design, provided an angulation
force of at least 10 pounds is maintained under all conditions of
loading.
(3) Tie-in guides required
in subsection(b)(1) of this section may be eliminated if one of the guide
systems in subsection (b)(3)(A), (b)(3)(B) or (b)(3)(C) of this section is
provided, or an equivalent.
(A) Intermittent
Stabilization System. The system shall keep the equipment in continuous contact
with the building facade, and shall prevent sudden horizontal movement of the
platform. The system may be used together with continuous positive building
guide systems using tie-in guides on the same building, provided the
requirements for each system are met.
1. The
maximum vertical interval between building anchors shall be three floors or 50
feet, whichever is less.
2.
Building anchors shall be located vertically so that attachment of the
stabilizer ties will not cause the platform suspension ropes to angulate the
platform horizontally across the face of the building. The anchors shall be
positioned horizontally on the building face so as to be symmetrical about the
platform suspension ropes.
3.
Building anchors shall be easily visible to employees and shall allow a
stabilizer tie attachment for each of the platform suspension ropes at each
vertical interval. If more than two suspension ropes are used on a platform,
only the two building-side suspension ropes at the platform ends shall require
a stabilizer attachment.
4.
Building anchors which extend beyond the face of the building shall be free of
sharp edges or points. Where cables, suspension wire ropes and safety lines may
be in contact with the building face, external building anchors shall not
interfere with their handling or operation.
5. The intermittent stabilization system
building anchors and components shall be capable of sustaining without failure
at least four times the maximum anticipated load applied or transmitted to the
components and anchors. The design wind load for each anchor shall be 600
pounds.
6. The building anchors and
stabilizer ties shall be capable of sustaining anticipated horizontal and
vertical loads from winds specified for roof storage design which may act on
the platform and wire ropes if the platform is stranded on a building face. If
the building anchors have different spacing than the suspension wire ropes or
if the building requires different suspension spacings on one platform, each
building anchor and stabilizer tie shall be capable of sustaining the wind
loads.
NOTE: See Figure 2 in Appendix B of this article for a
description of a typical intermittent stabilization
system.
(B) Button
Guide Stabilization System.
1. Guide buttons
shall be coordinated with platform mounted equipment as specified in Section
3295(e)(6).
2. Guide buttons shall be located
horizontally on the building face so as to allow engagement of each of the
guide tracks mounted on the platform.
3. Guide buttons shall be located in vertical
rows on the building face for proper engagement of the guide tracks mounted on
the platform.
4. Two guide buttons
shall engage each guide track at all times except for the initial
engagement.
5. Guide buttons which
extend beyond the face of the building shall be free of sharp edges or points.
Where cables, ropes and safety lines may be in contact with the building face,
guide buttons shall not interfere with their handling or operation.
6. Guide buttons, connections and seals shall
be capable of sustaining without damage at least the weight of the platform, or
provision shall be made in the guide tracks or guide track connectors to
prevent the platform and its attachments from transmitting the weight of the
platform to the guide buttons, connections and seals. In either case, the
design load shall be 600 pounds per building anchor.
NOTE:
1. See
Section 3295(e)(6) for
relevant equipment provisions.
2.
See Figure 3 in Appendix B of this article for a description of a typical
button guide stabilization system.
(C) System utilizing angulated roping and
building face rollers. The system shall keep the equipment in continuous
contact with the building facade, and shall prevent sudden horizontal movement
of the platform. This system is acceptable only where the suspended portion of
the equipment in use does not exceed 130 feet above a safe surface or ground
level, and where the platform maintains no less than 10 pounds angulation force
on the building facade.
(4) Tie-in guides for building interiors
(atriums) may be eliminated when a professional engineer currently registered
in the State of California determines that an alternative stabilization system,
including systems in Section
3294(b)(3)(A), (B) and
(C) or a platform tie-off at each work
station will provide equivalent safety.
(c) Roof Guarding.
(1) Buildings or structures shall be provided
with a perimeter guard consisting of a parapet or guardrail system meeting the
requirements of Section
3209 located above the adjacent
horizontal surface on which portable equipment such as davits and outriggers
beams are used to support suspended equipment or which provides access to or
from such equipment.
(2) All
parapet and guardrail systems installed on structures serviced by equipment
meeting Article 6 requirements that is transported on a trackless-type roof car
shall be designed and installed to withstand a minimum lateral force of 200
pounds per linear foot applied at 21 inches above the surface supporting the
roof car. All other installations shall be designed and installed to withstand
a minimum lateral force of 50 pounds per linear foot applied at the top of the
standard height guardrail or parapet.
(3) The perimeter guard shall not be more
than 6 inches inboard of the inside face of a barrier, i.e., the parapet wall
or roof edge curb of the building being serviced; however, the perimeter guard
location shall not exceed an 18-inch set-back from the building face.
(4) Where building features such as parapets
or guardrails are required to support workers' safety lines, they shall be
designed to withstand the combined vector component loads imposed without
causing damage to such building features.
(5) Parapets exceeding 6 feet in height above
the building area roof surface requiring roof-rigged transportable suspended
scaffold or similar equipment shall have a suitable peripheral walkway located
42 inches below the parapet on all areas using the exterior maintenance system.
Rolling scaffolds or ladders shall not be used unless they, the roof and
exterior maintenance systems are designed to be compatible with their
use.
(6) A specifically designed
fall protection system shall be provided and used on surfaces such as sloping
roof areas where workers' duties require that they gain access to or work from
such areas.
(A) The fall protection system
shall support a 5,000 pound safety line loading and enable the worker to ascend
and descend the sloping surface in a controlled manner using a primary and
secondary support line secured to a fall protection system at the upper end and
to the safety line at the lower end.
(B) Access shall not be permitted on surfaces
such as glazed roofs, vaults, or skylights unless an engineer currently
registered in the State of California has certified that the surface will
support all anticipated loads.
(d) Equipment Stops. Operational areas for
trackless type equipment shall be provided with structural stops, such as
curbs, to prevent equipment from traveling outside its intended travel areas
and to prevent a crushing or shearing hazard.
(e) Maintenance Access. Means shall be
provided to traverse all carriages and their suspended equipment to a safe area
for maintenance and storage.
(f)
Elevated Track.
(1) An elevated track system
which is located four feet or more above a safe surface, and traversed by
carriage supported equipment, shall be provided with a walkway and guardrail
system; or
(2) The working platform
shall be capable of being lowered, as part of its normal operation, to the
lower safe surface for access and egress of the personnel and shall be provided
with a safe means of access and egress to the lower safe
surface.
(g) Tie-down
Anchors. Imbedded tie-down anchors, fasteners, and affected structures shall be
corrosion resistant.
(h) Cable
Stabilization.
(1) Hanging safety lines and
all cables not in tension shall be stabilized at each 200 foot interval of
vertical travel of the working platform beyond an initial 200 foot
distance.
(2) Hanging cables, other
than suspended wire ropes, which are in constant tension shall be stabilized
when the vertical travel exceeds an initial 600 foot distance, and at further
intervals of 600 feet or less.
(i) Emergency Planning. A written emergency
action plan shall be developed and implemented for each kind of working
platform operation in conjunction with the emergency procedures plan required
of the building owner by Section
3292(d)(1). This
plan shall explain the emergency procedures which are to be followed in the
event of a power failure, equipment failure or other emergencies which may be
encountered. The plan shall also explain that employees inform themselves about
the building emergency escape routes, procedures and alarm systems before
operating a platform. Upon initial assignment and whenever the plan is changed,
the employer shall review with each employee those parts of the plan which the
employee must know to protect himself or herself in the event of an
emergency.
(j) Building
Maintenance. Repairs or major maintenance of those building portions that
provide primary support for the suspended equipment shall not affect the
capability of the building to meet the requirements of this standard.
(k) Electrical Requirements. The following
electrical requirements apply to buildings which utilize working platforms for
building maintenance:
(1) General building
electrical installations shall comply with the Electrical Safety Orders, unless
otherwise specified in this article;
(2) Building electrical wiring shall be of
such capacity that when full load is applied to the equipment power circuit,
not more than a five percent drop from building service-vault voltage shall
occur at any power circuit outlet used by equipment regulated by this
article;
(3) The equipment power
circuit shall be an independent electrical circuit that shall remain separate
from all other equipment within or on the building, other than power circuits
used for hand tools that will be used in conjunction with the equipment. If the
building is provided with an emergency power system, the equipment power
circuit may also be connected to this system;
(4) The power circuit shall be provided with
a disconnect switch that can be locked in the "OFF" and "ON" positions. The
switch shall be conveniently located with respect to the primary operating area
of the equipment to allow the operators of the equipment access to the
switch;
(5) The disconnect switch
for the power circuit shall be locked in the "ON" position when the equipment
is in use; and
(6) An effective
two-way voice communication system shall be provided between the equipment
operators and persons stationed within the building being serviced. The
communications facility shall be operable and shall be manned at all times by
persons stationed within the building whenever the platform is being used.
(Title 24, Part 2, 2-8521)
1.
Repealer and and new section filed 3-9-93; operative 4-8-93 (Register 93, No.
11). For prior history, see Register 85, No. 40.
2. Editorial
correction of subsection (c)(6)(B) (Register 95, No. 24).
3.
Amendment of subsection (i) and amendment of NOTE filed 4-27-2000; operative
5-27-2000 (Register 2000, No. 17).
Note: Authority cited: Section
142.3, Labor
Code. Reference: Section
142.3, Labor
Code; and Section
18943(b),
Health and Safety Code
