ANSI Z133-2012 – Safety Requirements for Arboricultural Operations
美國樹木行業安全操作標準
Proposed
Revisions – Public Review: 24 June – 8 August 2016
3
GENERAL SAFETY REQUIREMENTS
3.1
General
Revised
Section 3.1.3 Employers shall require that appropriate safety-related
work working practices be followed in accordance with applicable OSHA
and consensus standards, including, but not limited to such as ANSI
and ASTM., and As applicable, manufacturers’ recommendations should
be followed. See Section 5 for specific standards regarding vehicles
and mobile equipment.
3.2
Emergency Procedures and Readiness Revised Section 3.2.2 A first-aid
kit that meets the requirements of ANSI Z308.1 with contents
appropriate for the type of work and number of workers shall be
provided and maintained by the employer at the worksite. Arborists
and other workers shall be instructed in its use and specific
location. The employer shall provide and maintain a first-aid kit
that meets the requirements of ANSI Z308.1, with contents appropriate
for the type of job and number of workers.
Revised
Section 3.2.5 Cardiopulmonary resuscitation (CPR) and first aid
training shall be provided. For field crews involving two or more
workers at a work location, at least two workers trained in first
aid/CPR shall be available. However, only one trained person need be
available if all new employees are trained in first aid within three
months of their hiring dates.
3.3
Personal Protective Equipment (PPE) Revised Section 3.3.2 The
employer shall assess the worksite to determine if hazards are
present or are likely to be present and what type of personal
protective equipment is required. This assessment will be used to
determine the type of personal protective equipment that may be
required for employee protection.
3.4
Job Briefing and Worksite Set-up New Section 3.4.2 Before underground
work is performed, underground utilities shall be marked by
utility-locating services. New Section
3.4.2.1
Many utility-based locating services will not locate privately owned
underground lines, such as, but not limited to, irrigation,
electrical wires, and propane lines. Further resources or research
may be necessary to locate underground utilities on private
properties.
New
Section 3.4.4 Before commencing operations, a communication protocol
shall be established or reviewed between arborists aloft and
personnel working on the ground. Verbal communication by voice or
radio shall employ a command and response (C&R) protocol. “Stand
Clear” as the “C” from aloft and “Clear” as the “R”
from the ground are examples. Hand signals or whistles may also be
used. Eye contact with, or line-of-sight between, the arborist aloft
and the ground person should also be established when communicating.
Revised
Section 3.4.5 The arborist in charge shall establish a plan to safely
manage the worksite. Communications among arborists aloft and other
workers on the ground shall be established before commencing
operations. Predetermined, non-verbal communication such as whistles,
two-way hand signals, or radios may also be used. (b) designate a
visible drop zone for ground workers to safely avoid falling objects
New
Section 3.4.6 A visible drop zone may be designated as an aid to
avoidance of falling objects.
Deleted
Section 3.4.4 Communications among arborists aloft and other workers
on the ground shall be established before commencing operations. The
command “stand clear” from aloft and the response “clear”
from the ground are terms that may be used for this purpose.
Arborists and other workers entering or returning to the drop zone
shall be acknowledged by arborists aloft.
Deleted
Section 3.4.6 A visual hazard assessment, including a root collar
inspection, shall be made by a qualified arborist and shall be
performed prior to working in or on a tree.
New
Section 3.4.8 A qualified arborist shall visually inspect the tree,
including the root collar, and the area immediately surrounding the
tree for hazards before anyone climbs, otherwise enters, or performs
any work on the tree.
Revised
Section 3.4.9 If readily-identifiable warning signs such as fruiting
bodies, conks, dead sections, sloughing bark and/or cavities, are
detected visually, the qualified arborist shall then take further
steps to determine if the tree is safe enough to work on. proceed to
sound the area(s) with a mallet or perform some other test (e.g.,
drilling/probing) to determine if the tree is safe in which to climb
and perform work.
Revised
Section 3.4.9.1 Work shall not commence until a qualified arborist is
available to make the determination. If there is question as to the
condition of the tree, relative to the task to be performed, work
shall not commence until a more thorough assessment can be made
3.6
Fire Protection
Revised
Section 3.6.3 Flammable liquids shall be stored, handled, and
dispensed from approved and clearly marked containers.
4
ELECTRICAL HAZARDS
4.1
General New Section 4.1.1 4.1.1 All applicable requirements in
Section 3 shall apply to this section.
Revised
Section 4.1.2 4.1.2 The employer shall train each employee that all
overhead and underground electrical conductors, guy wires, pole
grounds and communication wires and cables, and guy wires shall be
considered energized with potentially fatal voltages.
Revised
Section 4.1.8
4.1.8
While climbing, the arborist should climb on the side of the tree
that is away from energized electrical conductors while maintaining
the required distances from their body, gear, and conductive tools
shown in Table 1, 2, or 3, as applicable. Arborists should climb on
the side of the tree that is away from the energized electrical
conductors.
New
Section 4.1.9 4.1.9 Climbers’ body, gear, and conductive tools
shall be maintained at the required distance shown in Table 1, 2, or
3, as applicable.
Revised
Section 4.1.10 4.1.10 The climber’s tie-in position point should be
above the worksite climber’s work position and located in such a
way that a slip would swing the arborist away from any energized
electrical conductor or other identified hazard.
Revised
Section 4.1.14 4.1.14 If aerial devices move closer than the required
minimum approach distance (MAD) workers must adhere to, workers on
the ground shall move away and remain clear of the aerial device
vehicle and attached equipment (e.g., stop chipping) until the
required MAD is established due to the possibility of step and touch
potential hazards. If the distance between the aerial device and
energized conductor is unintentionally less than the required MAD,
workers on the ground shall move away and remain clear of the aerial
device vehicle and attached equipment (e.g., stop chipping) until the
required MAD is reestablished, due to hazards of step and touch
potential.
4.2
Working in Proximity to Electrical Hazards – Incidental Line
Clearance (1910 Subpart S) Revised Section 4.2.2
4.2.2
Workers shall be trained on safety-related work practices that
protect employees against the voltage level to which they are
exposed. 4.3 Working in Proximity to Electrical Hazards – Utility
Line Clearance (1910.269)
Deleted
Section 4.3.5 4.3.5 For field crews involving two or more workers at
a work location, at least two workers trained in First Aid/CPR shall
be available. However, for line-clearance operations, only one
trained person need be available if all new employees are trained in
first aid within 3 months of their hiring dates.
Revised
Section 4.3.11 4.3.11 Qualified line-clearance arborists and
line-clearance arborist trainees shall maintain minimum approach
distances from energized electrical conductors in accordance with
Table 23.
Revised
Section 4.3.12 4.3.12 If the minimum approach distance (shown in
Table 23) cannot be maintained with the use of insulated tools during
the arboricultural operations, the qualified line-clearance arborist
shall request that the electrical system owner’s/operator’s
designated supervisor in charge coordinate communications and
operations between the electrical system owner/operator and the
qualified line-clearance arborist to mitigate the electrical hazard.
Mitigation options should include all safe, OSHA-compliant, and
practical work methods, and, where necessary, de-energizing, testing,
isolating, and grounding the electrical conductors by the electrical
system owner/operator (see Annex H). The designated electrical system
owner/operator employee and the designated qualified line-clearance
arborist in charge shall confirm that protective ground(s) have been
installed as close as practical to the line clearance work to be
performed to prevent hazardous differences in electrical potential.
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