First Aid and AED Requirements for Construction Sites

Construction sites have the highest medical emergency risks of any work environment. Falls, electrocutions, crush injuries, heat stroke, and cardiac events can happen without warning, and the minutes before EMS arrives are the ones that matter most. OSHA’s medical services and first aid standard (29 CFR 1926.50) sets the baseline for what every construction site is required to have in place. 

Here’s what that looks like in practice.

What OSHA Requires for First Aid on Construction Sites

Under 29 CFR 1926.50, employers must plan for quick medical care before the project starts. Medical personnel must be available for advice and consultation. If you cannot reach a hospital, clinic, or doctor within 3 to 4 minutes, at least one worker must always stay on-site. 

That worker must be present and have a valid first aid certificate.

• First aid supplies in a weatherproof container with individually sealed packages, inspected before each job, and checked weekly
• Emergency communication plan posted visibly with site location information for 911 dispatch
• Eye wash or body flushing facilities where workers may be exposed to corrosive materials
• Medical emergency provisions are documented before work begins

What Goes in a Construction Site First Aid Kit

OSHA’s Appendix A to 1926.50 and the ANSI/ISEA Z308.1 standard provide the baseline requirements for first aid kits. Kits should be scaled to crew size at a minimum of one per 25 workers and supplemented based on site-specific hazards.

• Gauze pads, including two large pads at least 8×10 inches
• Adhesive bandages in assorted sizes
• Gauze roller bandage and two triangular bandages
• Wound cleaning agents, adhesive tape, and latex gloves
• Resuscitation equipment, such as a pocket mask or resuscitation bag
• Blanket, scissors, and tweezers

Sites with chemical exposure require eye wash stations. High-heat environments need heat illness supplies.

AED Requirements for Construction Sites

OSHA does not require AEDs on all construction sites right now. 

But the American Heart Association says about 10,000 workplace cardiac arrests happen each year. OSHA strongly recommends positioning AEDs for a response within 3 to 5 minutes of cardiac arrest.

For every minute without defibrillation, survival odds drop 7 to 10%. The average EMS response time nationwide exceeds 8 minutes. When an AED reaches a victim within 3 minutes, survival rates can reach 74%. With CPR alone, that number sits around 9%.

On sites where electrocution is a risk, an on-site AED is clearly needed. Electrocution is one of OSHA’s Fatal Four causes of construction deaths.

• AED positioned for access within 3 to 5 minutes from any point on-site
• Workers trained in AED operation with current AHA or equivalent certification
• Maintenance program in place covering battery monitoring, pad replacement, and firmware checks
• The AED location is clearly marked and communicated to all workers
• AED inspections are documented in regular safety records

CPR and First Aid Training

OSHA’s 29 CFR 1926.50 requires documentary evidence of valid first aid certification on sites where a medical facility isn’t reasonably accessible. AHA and American Red Cross certifications satisfy this requirement and are valid for two years. On larger sites with multiple shifts, rotating crews, or remote access, a single certified responder isn’t enough. The number of trained workers should reflect the site’s size and the realistic travel time to any injured worker.

A compliant training program covers:

• CPR using current 2025 AHA techniques, including hands-only CPR
• AED operation and device-specific training
• Bleeding control, wound management, and burn treatment
• Heat and cold emergency response
• Choking relief and fracture management
• Certification documentation on file with renewal dates tracked

Where Construction Sites Fall Short

Most first aid compliance failures come down to documentation gaps and maintenance issues, not intent. OSHA most frequently cites sites for:

• First aid kits are not inspected or restocked weekly
• No certified first aider present during all active shifts
• Lapsed training certifications not renewed on schedule
• AEDs are not maintained or positioned too far from work areas
• Missing or poorly located emergency communication plans
• No documented medical emergency provisions before the project started

Put the Right Coverage in Place

First Response Health & Safety provides on-site EMTs, paramedics, and nurses nationwide. We support construction sites, industrial facilities, and mission-critical environments. Our services include emergency response, post-incident assessments, and return-to-work evaluations. 

We also provide full EMS coordination. First Response provides AHA-certified training for crews of any size. We teach CPR, AED use, and first aid. We bring the training directly to your site.