13.2 Construction, Roadside, and Work-Zone Safety

Safety questions are decisions about hazards, roles, and controls—not invitations to rely on a remembered slogan. For a July 2026 PE Civil: Structural exam, the controlled safety reference is only the specified portions of Title 29 CFR Parts 1910 and 1926 supplied by NCEES, dated July 2020. Use the exact supplied excerpt for numerical thresholds, definitions, exceptions, and prescribed systems. Do not present current OSHA web text, an unsupplied subpart, a state-plan rule, or a later revision as though it were the exam reference. Real work still follows current applicable law.

Hazard-to-Control Workflow

1. Name the operation. Examples include scaffold erection, steel connection, concrete placement, form stripping, work beside traffic, or vehicle backing.
2. Identify the exposure. Look for falls, falling objects, collapse, struck-by, caught-between, electrical contact, impalement, moving equipment, public traffic, or changing ground support.
3. Identify the role. Determine what the employer, competent person, qualified person, operator, signaler, or exposed worker must decide or do under the supplied text.
4. Select the control family. Consider elimination or separation, engineered protection, work practice and access controls, and required personal protective equipment.
5. Look up exact requirements. Search the supplied July 2020 excerpt for the operation and verify definitions, limits, alternatives, and exceptions.
6. Reassess after change. Weather, impact, relocation, new equipment, removed guardrails, shifted traffic, or altered sequence can invalidate the original control.

A competent person is not simply the most senior worker. The supplied definition ties the role to recognizing existing and predictable hazards plus authority to correct them promptly. A qualified person has the knowledge, training, experience, or recognized standing required for the technical problem under the applicable definition. One individual may satisfy both roles, but the titles are not automatically interchangeable.

Falls and Falling Objects

Determine where workers stand, how they arrive, what edges or openings exist, and what changes during the task. The supplied provisions may require a guardrail system, personal fall-arrest system, safety net, covers, controlled access, or another identified method depending on the operation. Do not invent a universal height threshold from memory; retrieve the applicable value and exception from the furnished excerpt.

Personal fall arrest requires a complete system and suitable anchorage, connection, clearance, and compatible equipment. Tying to an unverified handrail, temporary brace, or scaffold component can transfer force into something not designed as an anchor. Falling-object exposure may need toe boards, screens, canopies, barricaded zones, material control, or another supplied measure; protecting the worker at elevation does not protect people below.

Scaffold, Steel, and Concrete Work

For a scaffold, check foundation and base support, planking or platform condition, load and material storage, ties and braces, safe access, fall protection, falling-object protection, power-line exposure, and inspection after erection, alteration, movement, impact, or adverse conditions. Erection, dismantling, or modification must follow the role and supervision provisions in the supplied excerpt. Never remove a brace merely to improve access without reevaluation.

For steel erection, focus on stability throughout hoisting and connection: rigging and suspended-load exposure, landing and securing members, connector access, temporary connections, decking or openings, fall exposure, and the effect of releasing the crane. A member that is stable while held by the hoist may become unstable at release. The erection sequence and temporary bracing must agree with the structural plan.

For concrete construction, consider forms and shores, reinforcing-steel impalement, placement equipment, limited or controlled access where applicable, premature form removal, and the strength needed before load transfer. Structural calculations establish capacity; the supplied OSHA provisions establish safety duties within their scope. Passing one does not automatically satisfy the other.

Roadside and Work-Zone Exposure

A work zone must guide road users while providing workers a survivable work area. Identify the advance warning, transition, activity, and termination functions shown in the problem; channelize traffic through a clear path and protect the work space as the applicable supplied material and scenario require. Consider vehicle speed and trajectory, barriers or other separation, device visibility, lighting and glare, flagger or signaler position, communication, and an escape route. Do not stand where an errant public vehicle or reversing construction truck can pin a worker against equipment or a rigid object.

Construction access crossing public traffic needs coordinated entry and exit, sight distance, delivery timing, and control of backing or blind spots. High-visibility apparel or signaling requirements must be taken from the supplied excerpt rather than a remembered current manual. Inspect after traffic shifts, device displacement, weather, darkness, or changes in work limits.

Worked Changing-Condition Scenario

A crew works from a tied scaffold beside an open traffic lane to repair a concrete pier. Overnight, a vehicle strikes a channelizing device and the scaffold base settles after rain. The morning task is not “continue carefully.” Apply the workflow:

1. Stop exposure and keep workers off the affected scaffold and out of the compromised roadside area.
2. Restore or revise traffic separation before placing personnel where public traffic can reach them.
3. Have the required competent person reassess the scaffold base, plumbness, ties, braces, platform, access, fall protection, and falling-object zone under the supplied provisions.
4. Inspect temporary anchorage and the supporting ground; obtain technical evaluation where the change exceeds the competent person's authority or expertise.
5. Reestablish access, escape space, device visibility, and communication for traffic and construction equipment.
6. Resume only after deficiencies are corrected and required authorization or inspection is complete.

The scenario integrates roadside and construction hazards: fixing only the displaced device leaves scaffold instability, while leveling the scaffold alone leaves traffic exposure.

Exam Discipline

Read role words and exceptions closely. Confirm any precise threshold in the July 2020 excerpt; memory or current-web practice is not controlled exam evidence.