29 CFR Part 1926, Subpart CC, Appendix B to Subpart CC of Part 1926 - Assembly/Disassembly: Sample Procedures for Minimizing the Risk of Unintended Dangerous Boom Movement

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There are 3 Updates appearing in the Federal Register for 29 CFR 1926. View below or at eCFR (GPOAccess)
View PDF at GPO Pt. 1926, Subpt. CC, App. B
Appendix B to Subpart CC of Part 1926—Assembly/Disassembly: Sample Procedures for Minimizing the Risk of Unintended Dangerous Boom Movement
1. Section 1926.1404(f)(1) provides that when pins (or similar devices) are being removed, employees must not be under the boom, jib, or other components, except where the requirements of § 1926.1404(f)(2) are met. The exception in § 1926.1404(f)(2) applies when the employer demonstrates that site constraints require one or more employees to be under the boom, jib, or other components when pins (or similar devices) are being removed. In such a situation, the A/D director must implement procedures that minimize the risk of unintended dangerous movement and minimize the duration and extent of exposure under the boom.
The following scenario is an example of how the exception applies: A boom cannot be disassembled on the ground because of aboveground piping (as might be found, for example, in an oil refinery) that precludes lowering the boom to the ground. The boom must therefore be disassembled in the air, and the employees who remove the pins must perform that work from an aerial lift whose base is positioned on one side (the near side) of the boom. To gain access to the pins on the far side, the aerial lift basket must move under the boom, since, due to lack of room, the aerial lift cannot be repositioned on the far side. Due to lack of room, the aerial lift cannot be repositioned on the far side, so the aerial basket must move under the boom to gain access to the pins on the far side.
To minimize the risk of unintended dangerous movement while the pins are removed, the A/D director uses an assist crane that is rigged to support the boom section that is being detached, using particular care to ensure that the section end that is near the employee(s) removing the pins is well supported. The duration and extent of exposure is minimized by removing the far side pins first, moving the aerial lift basket as soon as possible to the near side so that the employees are no longer under the boom, and then removing the near side pins.
2. Section 1926.1404(h)(6)(i) provides that, during assembly/disassembly, the center of gravity of the load must be identified if that is necessary for the method used for maintaining stability. Section 1926.1404(h)(6)(ii) states that, where there is insufficient information to accurately identify the center of gravity, measures designed to prevent unintended dangerous movement resulting from an inaccurate identification of the center of gravity must be used.
An example of the application of § 1926.1404(h)(6)(ii) is as follows: The boom is assembled by lowering boom sections sequentially into place using an assist crane. The A/D director's plan is to keep the boom sections stable while they are lowered into place by attaching the assist crane hoist line above the center of gravity of each section. However, in assembling the non-symmetrical top section of the boom, the A/D director is not able to determine where to attach the assist crane hoist line so that it is above the center of gravity. In this situation, before raising the section, all personnel are kept clear of the section and the section is first raised a few inches to determine whether it tips when raised (if it did tip, it would indicate it is not rigged over the center of gravity). If this occurs, the hoist line is repositioned and the procedure repeated (with employees kept clear of the section while it is raised) until the A/D director determines that it is rigged over the center of gravity and can be moved into place without dangerous movement.

Title 29 published on 2013-07-01

The following are only the Rules published in the Federal Register after the published date of Title 29.

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  • 2014-04-11; vol. 79 # 70 - Friday, April 11, 2014
    1. 79 FR 20316 - Electric Power Generation, Transmission, and Distribution; Electrical Protective Equipment
      GPO FDSys XML | Text
      DEPARTMENT OF LABOR, Occupational Safety and Health Administration
      Final rule.
      The final rule becomes effective on July 10, 2014. (Certain provisions have compliance deadlines after this date as explained later in this preamble.)
      29 CFR Parts 1910 and 1926

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United States Code

Title 29 published on 2013-07-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 29 CFR 1926 after this date.

  • 2014-04-15; vol. 79 # 72 - Tuesday, April 15, 2014
    1. 79 FR 21164 - Cranes and Derricks in Construction: Operator Certification
      GPO FDSys XML | Text
      DEPARTMENT OF LABOR, Occupational Safety and Health Administration
      Notice of informal public hearing.
      Informal public hearing: The informal public hearing will be held on Monday, May 19, 2014, at 9:30 a.m. in the auditorium of the U.S. Department of Labor, 200 Constitution Avenue NW., Washington, DC 20210. Notice of intention to appear: Each person who wishes to testify at the hearing must submit a notice of intention to appear by April 25, 2014. Each person who files a notice of intention to appear may submit a written copy of additional comments to the record before or during the hearing for inclusion in the hearing record. Organizations may submit a single notice of intention to appear regarding multiple members of that organization, but the notice must list the name, occupational title, and position of each individual who plans to testify. In addition, all notices must also include the following information: (1) An email address or other contact information for receiving additional information about the hearing; (2) Name of the establishment or organization, if any, that each individual represents; (3) A brief summary of any documentary evidence each individual plans to present.
      29 CFR Part 1926