11.I.11 Material handling and storage.
- When hauling poles during the hours of darkness, illuminated warning devices must be attached to the trailing end of the longest pole.
- Materials and equipment must not be stored under energized bus, energized lines, or near energized equipment if it is possible to store them elsewhere. If materials or equipment must be stored under energized lines or near energized equipment, clearance must be maintained as in Table 11-1 and extraordinary caution must be exercised in maintaining these clearances when operating equipment or moving materials near such energized equipment.
- Tag lines must be of a non-conducting type when used near energized lines.
11.I.12 Before climbing poles, ladders, scaffolds, or other elevated structures, an inspection must determine that the structures are capable of sustaining the additional or unbalanced stresses to which they will be subjected. Poles or structures that may be unsafe for climbing must not be climbed until made safe by guying, bracing, or other means.
11.I.13 Before installing or removing wire or cable, action will be taken as necessary to prevent the failure of poles and other structures.
11.I.14 When setting, moving, or removing poles by cranes, derricks, gin poles, A-frames, or other mechanized equipment near energized lines or equipment, precautions must be taken to avoid contact with energized lines or equipment, except in bare hand, live-line work, or where barriers or protective devices are used.
11.I.15 Unless using protective equipment for the voltage involved, employees standing on the ground must avoid contacting equipment or machinery working adjacently to energized lines or equipment.
11.I.16 Lifting equipment must be bonded to an effective ground or it must be considered energized and barricaded when used near energized equipment or lines.
11.I.17 Pole holes must not be left unattended or unguarded.
11.I.18 Where necessary to assure the stability of mobile equipment, the location must be graded and leveled.
11.I.19 When employees are working at two or more levels on a tower, activities must be conducted such that there is a minimum exposure of employees to falling objects.
11.I.20 Guy lines must be used to maintain sections or parts of tower sections in position and to reduce the possibility of tipping. Guy lines on towers must be protected at ground level from accidental contact.
11.I.21 Tower members and sections being assembled must be adequately supported.
11.I.22 No one must be permitted under a tower that is in the process of erection or assembly, except as may be required to guide and secure the section being set.
11.I.23 When erecting towers using hoisting equipment adjacent to energized transmission lines, the lines must be de-energized when practical. If the lines are not de-energized, minimum clearance distances must be maintained as specified in Table 11-1 and extraordinary caution must be exercised in maintaining these clearances when operating equipment or moving materials near such energized equipment.
11.I.24 The load line must not be detached from a tower section until the section is adequately secured.
11.I.25 Except during emergency restoration procedures, tower erection must be discontinued in high wind or other adverse weather conditions that could make the work hazardous. When work is conducted under such conditions, the hazards and the means for their control must be delineated in an AHA.
11.I.26 Before stringing operations, a briefing must be held to discuss the following:
- The plan of operation;
- The type of equipment to be used;
- Grounding devices and procedures to be followed;
- Crossover methods to be employed; and
- Clearance authorizations that are required.
11.I.27 When there is a possibility of a de-energized conductor being installed or removed coming into accidental contact with an energized circuit or receiving a dangerous induced voltage buildup, the conductor being installed or removed must be grounded or provisions made to insulate or isolate the employee.
11.I.28 If an existing line is de-energized, proper clearance authorization must be secured and the line grounded on both sides of the crossover or the wire being strung or removed must be considered and worked as energized.
11.I.29 When crossing over energized conductors in excess of 600 volts, ropes, nets or guard structures must be installed unless provision is made to isolate or insulate the worker or the energized conductor. Where practical the automatic re-closing feature of the circuit- interrupting device must be made inoperative. In addition, the line being strung must be grounded on either side of the crossover or considered and worked as energized.
11.I.30 Conductors being strung or removed must be kept under positive control by tension reels, guard structures, tie lines, or other means to prevent accidental contact with energized circuits.
11.I.31 Guard structure members must be sound, of adequate dimension and strength, and adequately supported.
11.I.32 Catch-off anchors, rigging, and hoists must be of ample capacity to prevent loss of the lines.
11.I.33 Reel handling equipment, including pulling and braking machines, must have ample capacity, operate smoothly, and be leveled and aligned in accordance with the manufacturer's operating instructions.
11.I.34 The manufacturer's load rating must not be exceeded for stringing lines, pulling lines, sock connections, and all load-bearing hardware and accessories.
11.I.35 Pulling lines and accessories must be inspected regularly and replaced or repaired when damaged or when dependability may be doubtful.
11.I.36 Conductor grips must not be used on wire rope unless designed for this application.
11.I.37 Employees must not be permitted under overhead operations or on cross-arms while a conductor or pulling line is being pulled (in motion).
11.I.38 A transmission clipping crew must have a minimum of two structures clipped between the crew and the conductor being sagged. When working on bare conductors, clipping and tying crews must work between grounds at all times; the grounds must remain intact until the conductors are clipped in, except on dead end structures.
Knowledge Check Choose the best answer for the question.
11-10. What activity must determine the capable of structures to handle the additional stresses before climbing poles, ladders, scaffolds, or other elevated structures?
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