First Aid, CPR, and Emergency Response on the Jobsite

Why First Aid and Emergency Response Matter on a Construction Site

Heavy equipment worksites move fast and carry serious hazards: moving machinery, suspended loads, high heat, high-voltage lines, and confined spaces. When something goes wrong, you may be the first—and only—person near the victim for several minutes. Knowing what to do in those first minutes is the difference between a coworker surviving or not. OSHA requires employers to ensure that trained first-aid providers are available whenever a medical facility is not reasonably accessible. This lab prepares you to meet that expectation and to sit for a recognized first aid/CPR certification.

The Emergency Response Sequence

Before touching any victim, follow the universal sequence:

1. Scene safety first. Confirm the scene is safe for you to enter. On a heavy equipment site, shut down nearby machines, verify electrical sources are de-energized using lockout/tagout, and call out to confirm no secondary hazards (cave-in risk, swinging loads, live wires).

2. Activate Emergency Medical Services (EMS). Call 911 or direct a specific person to call. Give the address, nature of injury, number of victims, and your callback number. Never assume someone else has called.

3. Provide care until EMS arrives. Apply CPR if the victim is unresponsive and not breathing normally, control bleeding, or manage other life threats in the order they appear.

This sequence is the foundation of your site Emergency Action Plan (EAP) and applies to every scenario covered in today's lab.

CPR and AED Fundamentals

Hands-only CPR is effective for witnessed cardiac arrest in adults. Push hard (at least 2 inches deep) and fast (100–120 compressions per minute) on the center of the chest. Do not stop until an AED is ready, trained help arrives, or EMS takes over.

Full CPR (compressions plus rescue breaths) is recommended for children, infants, drowning victims, and any situation where an airway problem is likely the cause of arrest. The ratio for a single rescuer is 30 compressions to 2 breaths for adults, children, and infants.

Automated External Defibrillator (AED): Turn the unit on and follow voice prompts. Attach pads as shown in the diagram (one below the right collarbone, one on the left side of the chest below the armpit). Clear everyone away from the victim before the machine analyzes and before delivering a shock. Resume compressions immediately after the shock. On a construction site, locate the AED at the start of every shift—note where it is posted on the EAP.

The AED trainer units used in lab simulate all voice prompts and shock sequences without delivering real energy. Treat them as real during practice.

Construction-Specific Injury Scenarios

Crush Injury and Tourniquet Application

Crush injuries can produce rapid, life-threatening limb hemorrhage. If direct pressure does not control heavy bleeding from an extremity, apply a commercial tourniquet (such as a CAT or SOFTT-W) two to three inches above the wound. Tighten until bleeding stops, note the time of application on the tourniquet or the victim's skin with a marker, and report the time to EMS. Never remove a tourniquet in the field once applied.

Heat Stroke Recognition and Cooling

Heat stroke is a medical emergency, not just heat exhaustion. Warning signs include high body temperature, altered mental status or confusion, hot and dry or sweaty skin, and rapid pulse. Act immediately: move the victim to a cool, shaded area, remove excess clothing, and apply ice or cold wet cloths to the neck, armpits, and groin. Fan the victim. Call 911. Do not give fluids to an unconscious person. Heat stroke can kill within minutes if cooling is delayed.

Electrical-Contact Injury

If a coworker contacts a live electrical source, the no-touch rule is absolute: touching the victim while current is flowing will electrocute you as well. Your actions are:

1. Do not touch the victim.

2. Call 911 immediately.

3. If you can safely de-energize the circuit using lockout/tagout—without approaching the victim—do so.

4. Only approach the victim after a qualified person confirms the source is de-energized.

5. Electrical victims may have cardiac arrest or hidden internal burns; provide CPR and AED as soon as the scene is safe.

Personal Protective Equipment in First Aid Situations

Always use PPE when providing care. Disposable gloves are the minimum; use a CPR face shield or pocket mask for rescue breaths. Eye protection is appropriate when blood splash risk exists. Keep disposable gloves in your hard-hat shell or work bag throughout your career.

The Emergency Action Plan (EAP)

OSHA requires employers to have a written EAP for most worksites. As a crew member, you need to know and contribute to it. A basic EAP for a heavy equipment site includes:

• Muster point: a pre-designated, clearly marked meeting location away from hazards.
• Emergency contacts: site supervisor, local 911, poison control, and utility emergency lines.
• Nearest hospital route: printed directions, not assumed GPS access.
• Communication chain: who calls EMS, who notifies the supervisor, who meets the ambulance at the gate.

Draft your one-page EAP using the provided template. Peer review sharpens your eye for gaps—what looks complete to the writer often has missing information that a reviewer catches immediately.

Connecting to Your Credentials

OSHA 10 training covers emergency response duties and EAP requirements. NCCER Heavy Equipment curricula reinforce safe work practices including responding to jobsite emergencies. The first aid/CPR certification you earn today is a separate, recognized credential that travels with you to any employer.