Objective. Learners will identify the most common construction hazards—with emphasis on electrical, fall, struck-by, and caught-in/between—and explain the OSHA General Duty Clause, inspection rights, and employer/worker responsibilities well enough to pass the OSHA 10 construction outreach assessment.
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.
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Construction kills more workers than any other industry sector in the United States. For electrical lineworkers, the danger is compounded: you work at height, near energized conductors, around heavy equipment, and in excavations—often all on the same shift. OSHA's research consistently shows that four hazard categories account for the majority of construction fatalities. These are called the Focus Four: electrical, falls, struck-by, and caught-in/between. Learning to spot these hazards before they injure someone is the first job skill you will practice every single day.
The Occupational Safety and Health Act of 1970 created a federal framework for workplace safety. Section 5(a)(1), known as the General Duty Clause, requires every employer to furnish a workplace free from recognized hazards that are causing or likely to cause death or serious physical harm. This clause fills the gap when no specific OSHA standard covers a particular danger. If an inspector sees an obvious hazard and no written rule addresses it exactly, the General Duty Clause still gives OSHA authority to cite the employer.
For construction work—including utility and lineworker operations—the specific regulations live in 29 CFR Part 1926. This is the standard you will hear cited on every jobsite and in every inspection. Carry your Part 1926 pocket guide; it is a working tool, not a reference you leave in a locker.
Employers must:
Workers have the right to:
Knowing these rights protects you. Knowing the responsibilities tells you what to demand from your employer and what you owe your crew.
As a lineworker, energized conductors are your daily environment. Electrical hazards include contact with overhead or underground lines, improper grounding, damaged insulation, and use of conductive tools or ladders near live circuits. Controls include maintaining minimum approach distances, using insulated tools and rubber goods, establishing Electrically Safe Work Conditions through proper lockout/tagout (LOTO) procedures, and wearing arc-flash rated PPE appropriate to the voltage and incident energy level. Never assume a line is de-energized. Treat every conductor as live until it is properly tested, grounded, and tagged out by an authorized person.
Falls are the leading cause of construction fatalities. Lineworkers climb poles, towers, and aerial lifts daily. Fall protection is required when working at heights of 6 feet or more in construction (per 29 CFR Part 1926 Subpart M). Acceptable methods include guardrail systems, safety net systems, and personal fall arrest systems (PFAS). A PFAS includes a full-body harness, a lanyard or self-retracting lifeline, and an anchor point rated to withstand the arrest forces. Inspect every component of your PFAS before each use. Never tie off to a conductor or an unrated anchor.
A worker is struck by an object that moves toward them—a swinging load, a vehicle backing up, a dropped tool from above, or a snapped wire under tension. On lineworker sites, specific risks include conductor recoil, falling hardware, and moving boom trucks. Controls include wearing high-visibility vests, establishing exclusion zones around equipment, securing tools with lanyards at height, and using tag lines to control suspended loads. Hard hats rated for electrical work (Class E) protect against both impact and electrical contact.
These hazards occur when a worker is caught, squeezed, crushed, or pinched between two objects. Examples include unguarded rotating machinery, trench collapses, and pinch points on hydraulic equipment. Trench and excavation hazards (29 CFR Part 1926 Subpart P) require protective systems—sloping, shoring, or trench boxes—for excavations deeper than 5 feet. Never enter an unprotected trench.
OSHA expects hazards to be addressed in priority order:
1. Elimination – remove the hazard entirely.
2. Substitution – replace with something less hazardous.
3. Engineering controls – isolate workers from the hazard (e.g., guarding).
4. Administrative controls – change how work is done (e.g., job rotation, procedures).
5. PPE – the last line of defense, not the first.
PPE is required when other controls cannot reduce risk to an acceptable level, not instead of using those controls.
The OSHA 10-Hour Construction Outreach course is delivered by an OSHA-authorized trainer using a structured curriculum. Upon successful completion, OSHA's training institute issues a wallet card. The card signals to employers that you have baseline hazard awareness across the core construction topics. It does not replace site-specific training, and it does not make you a competent person under OSHA definitions for specific tasks—that designation requires demonstrated ability and additional training. However, many contractors require the card before you set foot on their sites, and it is a foundation requirement for this program.
Answer each question, then check it. Nothing is recorded; this is your own practice.
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