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2017年6月1日

ANSI Z133-2012 – Safety Requirements for Arboricultural Operations 美國樹木行業安全操作標準

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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