Workplace First Aid Kits: ANSI/ISEA Z308.1 Classes, Types, and Jobsite Organization

A construction site produces injuries in seconds: a nail puncture, a cut from a utility knife, an eye splash, a scrape across rough concrete. When those seconds arrive, the gap between a minor incident and a lost-time injury often comes down to whether a properly stocked first aid kit sits within reach. Kits locked in a gang box or left in a truck cab do no one any good. The tools that surround workers, from a top handle jigsaw to a framing nailer, demand an equally deliberate approach to emergency supplies.

This article walks through the standard that governs workplace first aid kits in the United States, explains how Class and Type ratings work, compares what the two classes must contain, and covers organizing, mounting, stocking, and maintaining kits on active jobsites. The goal is a kit that a foreman can grab in a crisis and a worker can maintain without a medical background.

What the ANSI/ISEA Z308.1-2015 Standard Requires

ANSI/ISEA Z308.1-2015 sets the minimum requirements for workplace first aid kits. It does not dictate brand, container design, or extras; it defines the floor. Any kit sold as compliant must carry the listed supplies in the stated minimum quantities, and the label has to say which class and type it meets. The standard splits into two independent ratings: Class, which describes the contents, and Type, which describes the container.

Class Ratings: A and B

Class A kits are sized for small crews and general hazards: offices, light assembly, and small maintenance teams. Class B kits carry larger quantities and a wider range of supplies for bigger crews and higher risk environments. A crew that spends the day cutting brush with cordless chainsaws or handling rebar needs Class B coverage; a two person office can usually get by with Class A.

Type Ratings: I through IV

Type ratings describe the container, not the contents. The four types cover stationary use, portability, mobility, and water resistance. The table below summarizes how they differ.

Most construction crews should target Type III or Type IV. A Type III kit mounts on a wall, survives rain exposure, and rides in a work truck without falling apart, which covers the majority of building sites.

Class A vs Class B: Matching Contents to Crew Size and Risk

The contents of the two classes overlap; the differences are quantity and a handful of extra items. Class A must contain adhesive bandages, antiseptic, burn treatment, and the basics. Class B includes everything in Class A in larger numbers and adds heavier trauma supplies.

Minimum Required Contents at a Glance

The table lists the minimum quantities called out by the 2015 revision. Real kits usually exceed these numbers, which is why a 204 piece kit and a 76 piece kit can both be compliant while serving very different crew sizes.

Beyond the Minimums: Construction-Specific Additions

The standard minimums cover general injuries, not every jobsite hazard. Most construction crews add the following:

• Eyewash bottles in dusty trades and where chemicals are mixed.
• Instant cold packs for sprains from ladders and scaffolds.
• A padded splint for suspected fractures on framing jobs.
• Extra exam gloves when crews handle rebar and wire.

Some crews pair the kit with cleanup and recovery gear. After an incident involving glass or broken tile, a compact wet dry vacuum clears debris fast and makes the area safe for the person giving care, which is why many service vans carry one alongside the first aid supplies.

Kit Container Types and Environmental Ratings

The container decides whether the kit survives the environment it works in. A cardboard box from a pharmacy will not last a season on a jobsite. Construction grade kits use impact resistant cases, seals that keep out dust and rain, latches that hold under vibration, and hinges that survive being tossed into truck beds and stacked under other equipment.

IP Ratings and Weather Seals

Many job rated kits carry an IP65 rating. The first digit, 6, means dust tight. The second digit, 5, means protected against low pressure water jets. Together they suit outdoor work and wet trades. No travel bin seals keep contents from shifting during transport, so bandages do not end up scattered across the case, and heavy duty latches prevent the case from popping open on impact.

Hinges and latches take abuse on sites, so buy kits with reinforced hinge points and latches that engage with a positive click. A case that pops open in the truck bed scatters sterile supplies into the dust, which is the fastest way to turn a rated kit into an unrated one.

Cold Weather and Climate Considerations

IP ratings cover water and dust, not temperature. In cold climates, supplies need protection from freezing, and workers need protection from cold stress. Crews that run winter jobs often pair the first aid kit with gear that reduces cold exposure, such as heated workwear that keeps hands and core warm during long shifts in unheated structures. Fewer cold injuries means less demand on the kit, but the kit still needs checking after freezing nights: ointments separate, and adhesive bandages lose tack when stored cold.

Organizing and Mounting Jobsite First Aid Kits

A kit that cannot be found is a kit that does not exist. Good organization keeps kits near the work, mounts them where they are visible, marks them so anyone can spot them, and ties them into the rest of the site so they stay put.

Modular Organizers and Removable Trays

Modern job rated kits increasingly use modular organizer trays and removable cups instead of a flat box. The benefits are practical:

• Removable cups let a worker refill one item without dumping the whole case.
• Compartments keep dressing types separated so a rescuer finds the right item fast.
• Spare space in the case allows crews to add trade specific items.
• Labeled cups make inventory checks quick at the start of each shift.

Wall Mounting and Identification

Wall mounts get the kit off the ground and keep it accessible. Screw in mounts secure the kit by its handle or case, and retroreflective stickers make the kit visible in low light and from multiple directions, which matters when power is out during an incident. Theft and misplacement are real concerns on open sites, so some crews link kits into the same tracking used for other equipment. Smart tool security systems that log equipment locations can flag when a kit leaves its assigned mount, keeping the first aid station where the safety plan says it should be.

The same organizer that holds the kit can hold a response plan: a printed card with emergency numbers, the site address for dispatchers, and the nearest trauma center location. Laminating that card and stowing it in the lid turns a supply box into a response station.

Stocking, Refilling, and Maintaining the Kit

A first aid kit is a consumable asset. Every use reduces readiness, and expiry dates quietly invalidate supplies. A monthly check takes ten minutes and prevents the worst failure mode: opening the kit during an emergency to find dried out ointment and empty bandage slots.

A Monthly Inspection Checklist

Assign one person per site to run the check on a fixed date:

1. Count every item against the Class A or Class B minimum list.
2. Check expiry dates on ointments, antiseptics, and burn treatments.
3. Verify the seals on sterile packages and eyewash bottles.
4. Inspect the tourniquet, trauma pad, and CPR shield for damage.
5. Test the latches, hinges, and wall mount.
6. Log the check date and the name of the person who performed it.

Refills should match what the kit shipped with. Swapping in a different size of bandage can break the quantity math the rating depends on, and mixing unrated supplies into a rated kit muddies the compliance claim. Keep spare refill stock on site so the kit is never down for weeks waiting on an order.

Right Sizing the Kit to the Site

Crew size, task risk, and distance to medical care all change the right answer:

• Fewer than five workers, low hazard: Class A kit.
• Five to fifteen workers, moderate hazard: Class B kit.
• Remote sites or work at height: Class B plus extra trauma supplies.
• Multi story buildings: one kit per floor or work zone, not one kit for the whole site.

Building a First Aid Program Around the Kit

The kit is one layer of a first aid program. OSHA requires employers to ensure first aid supplies are readily available and, where a medical facility is not nearby, that someone trained in first aid is on site. The practical sequence for a new site:

1. Run a hazard assessment: list the injuries plausible on this site this week.
2. Pick Class and Type based on crew size, risk, and environment.
3. Buy or assemble the kit, then verify the rating label against the standard.
4. Mount and mark kits in each work zone, with spares for vehicles.
5. Assign a trained person per shift and post their location.
6. Schedule monthly checks and after incident restocks.

Site infrastructure matters too. For sites without reliable mains power, a portable power supply keeps the first aid station lit, charges the radio used to call for help, and runs equipment that needs electricity, so the response does not depend on extension cords running across a dark site.

Manufacturers keep refining how kits and storage systems work, and following new product launches helps safety managers compare options before buying. Virtual launch events give crews a look at new kit configurations and accessories without waiting for a local distributor demo, which shortens the time between a standard change and a better kit on the wall.