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newSchoolWorks.com › VoTechWorks › Building & Construction › Electrical Lineworker › Rigging for Electrical Linework › Lesson 5
BLD-LINE69-04 · Lesson 5 · 7 clock hours · field

Rigging System Setup and Integrated Field Exercise

Objective. Students will plan, rig, execute, and document a complete multi-component lift (simulated pole or equipment set) using appropriate slings, hardware, hand signals, and tag-line control while maintaining a written lift plan and complying with all applicable safety requirements.

⚠ Pending professional review

This lesson, its worked examples and its practice questions has not yet been verified by a licensed professional engineer or master tradesperson or by a certification or approval body. It is a study draft and may contain errors. Do not use it as instructions for work on a job site or on live equipment. Always follow your instructor, your supervising professional, and current official references and regulations.

VoTechWorks program approval and accreditation are still in progress. Credentials are issued only by the certifying bodies named in each program, after their own exams.

Rigging System Setup and Integrated Field Exercise

This lesson brings together everything you have studied about slings, hardware, load calculations, and communication into a single supervised field evolution. By the end of today's exercise you will have planned, executed, and documented a complete multi-component lift from start to finish — the same sequence you will repeat on every jobsite for your entire career.

Why a Written Lift Plan Comes First

No rigging hardware gets touched until the lift plan is complete and reviewed. A lift plan is a written document that records the load weight, the rigging configuration, the working load limit (WLL) of every component, the working radius, the exclusion zone radius, and the names and roles of everyone involved. Writing the plan forces the team to catch problems on paper rather than under tension. On regulated worksites a lift plan is a compliance requirement, not a suggestion. Treat it that way here.

For today's scenario — setting a 40-ft Class 4 wood distribution pole weighing approximately 700 lb at a 12-ft working radius — your plan must include: confirmed pole weight, selected sling type and rated capacity, shackle WLL, choker hitch efficiency factor applied to the sling rating, exclusion zone radius, assigned signalperson, and tag-line handlers.

Rigging Component Selection and Inspection

Before any component goes into service, inspect it by hand and by eye. For wire rope slings, check for broken wires, kinking, bird-caging, corrosion, and damaged end fittings. A sling with broken wires in one lay length or a kinked section must be removed from service immediately — tag it and set it aside. Shackles must have their rated capacity stamped or forged on the bow; verify the pin is fully seated and moused (secured) with wire or a cotter pin. Never use a shackle with a bent pin or a cracked body.

Choker hitches reduce a sling's rated capacity. The standard efficiency factor for a choker hitch is approximately 75 percent of the straight-pull WLL (some references use 80 percent depending on the choke angle; use the conservative value your rigging chart specifies). Apply that factor before you compare the sling's effective capacity to your load. If a sling is rated 2,000 lb in a straight pull, its effective WLL in a choker hitch is approximately 1,500 lb. Your load must stay below that number.

Establishing the Exclusion Zone

An exclusion zone keeps non-essential personnel clear of the area where a dropped or swinging load could reach. As a practical field rule, the exclusion zone radius equals at least the height of the lifted load plus an additional buffer. On a pole set, that means the full length of the pole measured from its pickup point. Post a spotter at every access point to the zone, and ensure everyone inside the zone is wearing full PPE and has a defined role.

Hand Signals and Tag-Line Control

All crane and derrick lifts require a designated signalperson. Only one person gives signals to the operator at any time. Standard hand signals for boom trucks and derricks are defined in ASME B30.5 and are also covered in your NCCER rigging module — memorize them. If you lose sight of the load or the operator cannot see you, the signal is a closed fist: stop. Everyone on the team must know that signal.

Tag lines are non-conductive ropes attached to the load to control rotation and swing without workers putting their hands on a moving load. Assign one tag line to each end of a long load such as a pole. Tag-line handlers maintain light, steady tension — they are guiding, not stopping. Never wrap a tag line around your hand or body.

Executing the Lift and Stop-Work Authority

During the lift, every team member has stop-work authority. If anything looks wrong — a sling shifting, a shackle pin vibrating loose, an unauthorized person entering the exclusion zone — anyone calls "Stop" and the operator holds. The load is lowered and the situation is corrected before the lift resumes. There is no production pressure in training or in the field that overrides stop-work authority. When the instructor injects a scenario such as "a sling has slipped," your correct response is to call stop, lower the load to a safe resting point, identify and correct the problem, re-inspect all rigging, update the lift plan if needed, and only then resume.

Post-Lift Inspection and Documentation

After the load is set and the rigging is removed, inspect every component again. Wire rope slings stretched in a heavy lift may show distortion not present before. Shackle pins should be checked for straightness. Any component showing new damage is removed from service. Record your findings on the post-lift inspection log — date, component description, condition, and disposition (returned to service or removed). Your after-action report then identifies one thing the team did well and one improvement, citing the specific standard (NCCER module section, ASME B30 volume, or OSHA regulation) that applies to the improvement. Citing a standard shows you know where the rule comes from, not just that a rule exists.

Safety Reminders for the Field Evolution

Key terms9

Lift PlanA written document completed before a lift begins that records load weight, rigging configuration, component WLLs, working radius, exclusion zone, and personnel assignments.
Working Load Limit (WLL)The maximum load a rigging component is approved to handle under normal conditions, as rated by the manufacturer and stamped or labeled on the component.
Choker HitchA rigging configuration where the sling wraps around the load and passes through its own eye or fitting; reduces the sling's effective WLL, typically to about 75 percent of its straight-pull rating.
Exclusion ZoneA clearly defined area around a lift from which non-essential personnel are excluded to prevent injury from a dropped or swinging load.
Tag LineA non-conductive rope attached to a suspended load to control rotation and swing without workers physically contacting the moving load.
SignalpersonThe single designated crew member authorized to give hand or voice signals to the equipment operator during a lift; only one signalperson may give signals at a time.
Stop-Work AuthorityThe right and responsibility of any crew member to halt a lift or any operation when an unsafe condition is observed, without fear of reprisal.
Post-Lift InspectionA hands-on examination of all rigging components after a lift is complete to identify damage caused during the lift and determine whether each component may remain in service.
Bird-CagingA type of wire rope damage where the strands separate and flare outward, resembling a cage; a bird-caged sling must be removed from service immediately.

Worked examples4

1. A wire rope sling has a straight-pull WLL of 2,600 lb. It will be used in a choker hitch with an efficiency factor of 75 percent. The load is a 700-lb distribution pole. Does this sling have adequate capacity in a choker hitch?
  1. Step 1 — Find the effective WLL in a choker hitch: 2,600 lb × 0.75 = 1,950 lb.
  2. Step 2 — Compare the effective WLL to the load weight: 1,950 lb > 700 lb.
  3. Step 3 — Confirm the sling is adequate: the load (700 lb) is well below the effective WLL (1,950 lb), so the sling is acceptable for this lift.
Answer: The sling's effective WLL in a choker hitch is 1,950 lb, which exceeds the 700-lb load. The sling is acceptable.
2. The lift plan requires a shackle to connect the choker sling to the hook block. The load is 700 lb. Two shackles are available in the rigging bin: one stamped '3/4 ton WLL' and one stamped '1 ton WLL'. Which shackle is acceptable, and by how much does it exceed the load?
  1. Step 1 — Convert shackle WLLs to pounds: 3/4 ton = 1,500 lb; 1 ton = 2,000 lb.
  2. Step 2 — Compare each shackle WLL to the 700-lb load: 1,500 lb > 700 lb (acceptable); 2,000 lb > 700 lb (also acceptable).
  3. Step 3 — Either shackle exceeds the load, but for this single-line, single-choker lift on a 700-lb pole the 3/4-ton (1,500-lb WLL) shackle is the minimum acceptable. It provides a margin of 1,500 − 700 = 800 lb above the load.
  4. Step 4 — Record the selected shackle's WLL on the lift plan and verify the pin is fully seated and moused before use.
Answer: Both shackles exceed the 700-lb load. The 3/4-ton (1,500-lb WLL) shackle is the minimum acceptable and provides an 800-lb margin above the load weight.
3. A student needs to define the exclusion zone for setting a 40-ft pole. The pole will be picked up at the butt and swung upright, so the farthest point of the load from the lift point is 40 ft. What is the minimum exclusion zone radius?
  1. Step 1 — Identify the critical dimension: the full length of the pole is 40 ft; this is the maximum distance a falling pole could reach from the pick point.
  2. Step 2 — Apply the field rule: exclusion zone radius ≥ full length of the lifted object = 40 ft minimum.
  3. Step 3 — Round up for any site-specific hazards (slopes, other equipment) and mark the boundary with cones, barrier tape, or spotters before the lift begins.
  4. Step 4 — Document the exclusion zone radius (40 ft minimum) on the lift plan.
Answer: The minimum exclusion zone radius is 40 ft, equal to the full length of the pole, measured from the lift point in all directions.
4. A sling used in a previous shift has a rated straight-pull WLL of 3,000 lb. During post-lift inspection a student counts six broken wires in one lay length of the rope. What is the correct disposition of this sling?
  1. Step 1 — Recall the removal-from-service criterion for wire rope slings: broken wires exceeding a specified number in one lay length (the ASME and OSHA criteria specify removal when broken wires reach or exceed a defined threshold within one lay length; six broken wires in one lay length meets or exceeds common removal criteria).
  2. Step 2 — The sling cannot be returned to service regardless of its WLL rating.
  3. Step 3 — Tag the sling 'REMOVE FROM SERVICE — DO NOT USE,' remove it from the rigging area, and record the finding on the post-lift inspection log with the date and the inspector's name.
  4. Step 4 — Notify the instructor or supervisor so a replacement sling can be obtained.
Answer: The sling must be removed from service immediately. Tag it, document the finding on the inspection log, and do not use it again until it has been properly condemned and replaced.

The math in this lesson1

Learners reduce a 2,600 lb WLL by a 0.75 choker factor to 1,950 lb and compare to the load.
7.RP.3
Brush up in the math halls at newSchoolWorks.com:
In class: Pre-lift planning exercise: each student team (two to three persons) receives a scenario card (e.g., 'set a 40-ft Class 4 wood distribution pole using the program's digger-derrick trainer; pole weighs approximately 700 lb; working radius 12 ft; identify sling, choker, and shackle requirements, calculate load on each rigging component, identify exclusion zone radius, and complete a written lift plan form before touching any equipment'). · Field execution: teams rig and execute the simulated lift under instructor observation, using all required PPE (hard hat, safety glasses, leather gloves, hi-vis vest, steel-toed boots), correct hand signals, and two-person tag-line control; the instructor may inject a stop-work scenario (e.g., 'a sling slips—what do you do?') to test the team's response. · Post-lift debrief and documentation: each student individually completes a post-lift inspection log for all rigging components used and writes a brief (one-page) after-action report identifying one thing the team did well and one improvement, referencing the applicable standard.
Materials: Digger-derrick trainer or field boom truck, 40-ft mock pole or equivalent weighted load, wire rope slings (various sizes), shackles, snatch block, tag lines, lift plan forms, post-lift inspection log forms, PPE (hard hats, safety glasses, leather gloves, hi-vis vests, steel-toed boots), NCCER Power Line Worker rigging module.
Check: Instructor uses a field competency checklist (lift plan complete before lift, correct hardware selected and inspected, WLL not exceeded, correct signals used, tag lines applied, exclusion zone established, PPE worn by all); each item is pass/fail—student must receive a pass on every checklist item; a single critical safety failure (e.g., load over WLL, no exclusion zone) requires a full repeat of the exercise.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.

NCCER Power Line Worker — Rigging
1. A lift plan must be completed:
NCCER Power Line Worker — Rigging
2. A wire rope sling is rated 2,000 lb in a straight pull. When rigged in a choker hitch using a 75 percent efficiency factor, its effective WLL is:
OSHA 10 — Hazard Recognition and Stop-Work Authority
3. During a pole-setting lift the instructor announces, 'A sling has just slipped on the load.' The correct immediate action is to:
NCCER Power Line Worker — Rigging
4. Which condition requires a wire rope sling to be removed from service?
NCCER Power Line Worker — Rigging
5. The minimum exclusion zone radius when setting a 40-ft distribution pole is:
NCCER Power Line Worker — Rigging
6. During a lift, only one person may give signals to the equipment operator. If that signalperson loses sight of the load, the correct signal is:
NCCER Power Line Worker — Rigging
7. A shackle must be removed from service if:
NCCER Power Line Worker — Professional Practice
8. A student's after-action report identifies an improvement and cites 'the applicable standard.' What does citing the standard demonstrate?
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