Boatyard & Dry-Stack Fire Extinguisher Requirements

Overview

If you run a boatyard, the extinguishers around the yard are your responsibility, not the boat owners'. A boatyard shares the marina's dockside rules but adds two hazards an ordinary slip-and-fuel marina does not have: the hot work and repair that go on in the yard, and the tall multi-tier dry-stack racks where boats are stored indoors. Both change how you protect the facility, and both are where this guide spends most of its time.

We start with who owns the compliance problem, then cover what NFPA 303 puts on the facility, then walk the two boatyard-specific hazards — hot work and dry-stack storage — before closing with the NFPA 10 service calendar and the bulk-buying conversation. For the general dockside picture — travel distance, fuel docks, and salt-air corrosion — the marina and dock buyer's guide goes deeper, and this guide links to it rather than repeating it.

The one-paragraph version: the boatyard facility is covered by NFPA 303 and the locally adopted fire code; each boat is covered separately by U.S. Coast Guard rules. Put an ABC dry-chemical unit around the general yard, a high-flow ABC unit as the code-compliance extinguisher at the fuel dock (with Purple K for fast knockdown and CO2 where electronics are in play as supplements), a high-rated Class B unit such as Purple K in the repair bays, and keep hot work under an NFPA 51B permit with a trained fire watch and an extinguisher at hand. Dry-stack racks lean on fixed systems rather than portables, and everything gets serviced on the NFPA 10 schedule.

Who Is Responsible: Facility vs. Vessel

Marine fire protection splits cleanly into the facility and the boat, and they are governed by different authorities. Keeping them straight is the difference between a compliant yard and a surprise at inspection.

What	Who is responsible	Governing rules
The boatyard / facility	Boatyard or facility operator	NFPA 303 and the locally adopted fire code (for example IFC Ch. 36)
Hot work / repair operations	Facility operator and the contractor doing the work	NFPA 51B and OSHA welding and cutting rules
The boat / vessel	Boat owner	U.S. Coast Guard rules (46 CFR for uninspected and commercial vessels, 33 CFR for recreational)

Do not conflate them. A yard is not compliant just because the boats stored in it carry their own extinguishers, and the yard's extinguishers do not satisfy any boat's Coast Guard requirement. And when a contractor rolls in to grind, weld, or spray on your property, the hot-work fire safety is a shared obligation between the yard and the contractor — not something you can hand off entirely.

What NFPA 303 Covers

NFPA 303, the Fire Protection Standard for Marinas and Boatyards, applies to marinas and boatyards along with the support, repair, storage, haul-out, launch, and fueling facilities that serve craft not exceeding 300 gross tons. The current edition is the 2026 edition, and a few of its changes matter to a working yard.

Scope now names maintenance and servicing. The 2026 edition clarified its scope by adding the maintenance and servicing operations a boatyard does, which puts the repair side of the yard squarely inside the standard.
New shrink-wrap operations requirements. The 2026 edition added detailed requirements for shrink-wrap operations — the propane-torch heat-shrinking used to cover boats for storage, a real ignition source in the off-season.
A hot-work vapor limit. The 2026 edition requires that where hot work is done, the flammable-vapor concentration stay below 10 percent of the lower flammable limit (LFL), aligned with NFPA 306 and OSHA 29 CFR 1915. More on that in the hot-work section below.

The portable-extinguisher placement rules a boatyard follows come mostly from the adopted fire code and NFPA 10. The general placement figures below come from the International Fire Code (IFC), which most authorities having jurisdiction adopt:

Area	What the code calls for	Source
General piers, wharves, and floats	A moderate (ordinary) hazard extinguisher at each required standpipe hose connection (commentary example 2-A:10-B:C), plus enough units that no point is more than 75 ft of travel from one	IFC §3604.4
Standpipe hose connections	Class I standpipe connections located so no point on the pier or float system is more than 150 ft from a connection	IFC §3604.2
Fuel dispensing	A minimum 2-A:20-B:C extinguisher not more than 75 ft from the pumps, dispensers, or storage-tank fill openings	IFC §2305.5
Marine motor fuel-dispensing floats	A minimum 20-B:C extinguisher on each float, and one on the pier or wharf within 25 ft of the head of the gangway to the float	IFC §2310.6.4

How many do you actually need? NFPA 303 does not set a fixed count per boat or per slip; the number follows from the layout and the placement rules — travel distance, standpipe locations, the fuel dock, and the repair and storage areas. Your authority having jurisdiction, usually the local fire marshal, adopts the fire code and has the final say on the count, ratings, and placement.

One standard that does not apply here: NFPA 307 covers the construction and fire protection of cargo-handling marine terminals, piers, and wharves, not marinas and boatyards. Recreational and small-craft yards stay under NFPA 303.

Hot Work and Repair: the Boatyard Difference

Hot work is what sets a boatyard apart from a marina. Welding, cutting, grinding, torch-applied shrink-wrap, and the solvents, resins, and fresh paint around a repair project put ignition sources next to flammable materials on a daily basis. That is why the fire-protection rules layer a permit-and-fire-watch program on top of the extinguisher placement.

The consensus standard for that program is NFPA 51B, Fire Prevention During Welding, Cutting, and Other Hot Work. On the regulatory side, OSHA 29 CFR 1910.252 sets welding and cutting fire-prevention rules for general industry, and OSHA 29 CFR 1915 Subpart P, Fire Protection in Shipyard Employment, applies to marine repair; NFPA 51B is the industry consensus standard that OSHA guidance and enforcement follow. In practice, the program comes down to a few things:

A fire watch during and after the work. NFPA 51B requires a fire watch during hot work and for at least one hour after it is finished, with up to three additional hours of monitoring at the direction of the permit authorizing individual, because smoldering ignition can surface long after the torch is off.
A trained, equipped watch. The fire watch has to be trained in extinguisher use and equipped with an appropriate portable extinguisher on the spot — not one down the dock.
A vapor check where NFPA 303 applies. The 2026 edition of NFPA 303 requires the flammable-vapor concentration in the hot-work area to stay below 10 percent of the lower flammable limit, aligned with NFPA 306 and OSHA 29 CFR 1915 — a real concern around fuel tanks, bilges, and freshly sprayed hulls.

A repair bay is a higher-hazard area than the general yard because of that fuel, solvent, resin, paint, and battery mix, so the extinguisher it wants is rated for the flammable-liquid hazard. NFPA 10 places extra-hazard Class B units at shorter travel distances than the general dock:

Class B hazard level	Min rating at 30 ft travel	Min rating at 50 ft travel
Extra (high) hazard	40-B	80-B

For the full sizing table across light, ordinary, and extra hazard, see the Class B fire extinguisher guide. The right rating and exact placement for your bays are set by your authority having jurisdiction.

Matching the Extinguisher to the Work Zone

The code sets where extinguishers go and the minimum ratings; which agent you put in each spot is a selection decision. The recommendations below are ours, based on what each part of a boatyard is most likely to burn.

General yard and walkways: ABC dry chemical

For the routine yard — walkways, storage rows, the office and workshop perimeter — a multipurpose ABC dry-chemical unit is the workhorse. It covers ordinary combustibles, the flammable liquids you find around boats, and energized electrical, which is the mix a general yard location is most likely to see. A 5 or 10 lb unit on a wall hook is the common choice.

Fuel dock and repair bays: Class B

Fuel dispensing and the repair bays are extra-hazard areas, so they want a higher-rated unit set close to the hazard. At a motor-fuel dock the code-compliance extinguisher is a high-flow ABC dry-chemical unit — the fire code calls for at least a 2-A:20-B:C rating within 75 feet of the pumps, dispensers, or fill openings (IFC §2305.5), and NFPA 30A adds a high-flow requirement at the dispensing area that a standard unit does not meet. Confirm the required minimum size and discharge rate with your AHJ, since the marine/fuel-dispensing rule can set a higher minimum than a standard unit (commonly cited in the 10-20 lb range), and verify it on the unit. Purple K and CO2 are supplements to that compliance unit, not substitutes for it: Purple K is the fastest-knockdown dry chemical on a gasoline or diesel fire and carries the high Class B rating a repair bay needs (80-B:C handheld), and CO2 is a clean, residue-free choice where fuel-system electronics, controls, or pumps are in play. None of these contain PFAS.

Haul-out, launch, and large platforms: wheeled units

Where a haul-out area, travel-lift pit, launch ramp, or larger fueling platform needs more agent and more reach than a handheld delivers, a wheeled unit is the step up. They carry the high Class B ratings a fuel or repair hazard wants and roll to the fire instead of being carried. The Purple K and ABC wheeled units carry the high Class B ratings; the CO2 wheeled is a residue-free supplement for electronics-sensitive areas.

If the clubhouse has a commercial kitchen: a galley or clubhouse fryer line is a Class K hazard, not Class B, and needs a wet-chemical unit that cools and seals hot cooking oil. That is a separate fixture from the yard units; see the Class K fire extinguisher guide.

Dry-Stack and Rack Storage

Dry-stack storage is the second hazard unique to boatyards. Boats sit on tall steel racks, often several tiers high, indoors or under cover. A fire high in the rack is out of reach of any handheld extinguisher, and a boat itself — with its fuel, resin hull, and upholstery — is a substantial fuel package. For a fire in a multi-tier rack, portable extinguishers are for early, reachable, ground-level fires only; the primary protection is a fixed system, not a hand can.

That is why rack-storage fire protection is generally built around an automatic sprinkler system designed to the storage standard, with portable extinguishers placed for the walkways and work areas around the racks rather than for the racks themselves. Sprinkler design for high-piled and rack storage falls under NFPA 13 and the fire code's high-piled-storage provisions, and the specifics — sprinkler density, whether in-rack sprinklers are needed, and any alternative arrangement — are an engineering and AHJ decision for the building, not something a portable extinguisher can substitute for.

Do not treat portables as rack protection. No portable extinguisher count or coverage is a substitute for the fixed system a dry-stack building needs. Size and place portables for the ground-level walkways, the work areas, and the forklift or stacker aisles, and treat the rack itself as a fixed-system and building-design question for your fire protection engineer and fire marshal.

The Service and Replacement Cycle

Yard extinguishers are a recurring line item, not a one-time purchase. NFPA 10 sets the maintenance calendar, and a yard that budgets for it avoids both the compliance gap and the scramble of an unplanned replacement run. The intervals:

Interval	What happens
Monthly	Visual inspection: pressure gauge in the green where fitted (CO2 units have none), seal intact, no physical damage or corrosion
Annually	Professional maintenance by a certified technician, with an updated service tag
Every 6 years	Internal examination of rechargeable stored-pressure extinguishers
Every 5 years	Hydrostatic test for CO2, water, and AFFF units
Every 12 years	Hydrostatic test for dry-chemical units
At 12 years	Non-rechargeable (disposable) extinguishers are removed from service

On top of the calendar, any extinguisher that has been used, even a short burst, must be recharged before it goes back into service. And an outdoor yard is a harder environment than an indoor building — salt air, UV, and moisture accelerate corrosion of cylinders, valves, and seals, so expect closer scrutiny at the annual service and budget for the occasional unit condemned early. For the full inspection and maintenance detail, plus the mounting and cabinet rules that keep units protected outdoors, see our NFPA 10 reference and the mounting and placement requirements.

Outfitting a Whole Boatyard

A boatyard rarely buys a single extinguisher; outfitting or standardizing a yard is a multi-unit order across the general yard, the fuel dock, the repair bays, and the storage building. Bringing a yard up to code, standardizing units so every location carries the same serviceable lineup, or covering several properties on one order is where buying in volume pays off, both on price and on consistency. Wheeled and multi-unit orders ship by freight, and we confirm delivered pricing in the quote rather than guessing it at checkout.

Outfitting or re-extinguishering a boatyard?

Volume pricing on ABC, Purple K, CO2, and wheeled extinguishers for yards, fuel docks, repair bays, and dry-stack buildings, with spec sheets for your fire marshal or insurer. Quotes back within one business day.

or call 714-248-6555 · email partners@usmadesupply.com

Frequently Asked Questions

What fire code applies to a boatyard?

NFPA 303, the Fire Protection Standard for Marinas and Boatyards, along with the locally adopted fire code such as the International Fire Code. NFPA 303 applies to marinas and boatyards and the support, repair, storage, haul-out, launch, and fueling facilities serving craft up to 300 gross tons. Cargo-handling terminals fall under NFPA 307 instead, and each boat is covered separately by U.S. Coast Guard rules.

Do hot work and welding in the yard need a fire watch?

Yes. Under NFPA 51B, hot work such as welding, cutting, and grinding needs a fire watch during the work and for at least one hour after it is finished, with up to three additional hours of monitoring at the direction of the permit authorizing individual. The fire watch must be trained in extinguisher use and equipped with an appropriate portable extinguisher on the spot. OSHA welding and cutting rules and, for marine repair, OSHA 29 CFR 1915 Subpart P also apply.

How do you protect a dry-stack storage building?

Primarily with a fixed system, not portables. Boats stored several tiers high on steel racks are out of reach of any handheld extinguisher, so rack-storage fire protection is generally built around an automatic sprinkler system designed to the storage standard (NFPA 13) and the fire code's high-piled-storage provisions. Portable extinguishers are placed for the ground-level walkways and work areas around the racks; the rack protection itself is an engineering and AHJ decision for the building.

What extinguisher does a repair bay need?

A repair bay is an extra-hazard area because of the fuel, solvents, resin, paint, and batteries around a project, so it wants a higher-rated Class B unit set close to the work. NFPA 10 places extra-hazard Class B extinguishers at 40-B within 30 feet or 80-B within 50 feet. Purple K gives the fastest knockdown on a flammable-liquid fire; CO2 is a clean supplement where electronics are involved. Your fire marshal sets the final rating and placement.

What kind of fire extinguisher does a fuel dock need?

Fuel dispensing is an extra-hazard area. The fire code calls for at least a 2-A:20-B:C extinguisher within 75 feet of the pumps, dispensers, or fill openings (IFC §2305.5), and for marine fuel-dispensing floats a minimum 20-B:C unit on each float plus one within 25 feet of the head of the gangway (IFC §2310.6.4). The code-compliance unit at the dock is a high-flow ABC dry-chemical extinguisher — NFPA 30A adds a high-flow requirement a standard unit does not meet. Confirm the required minimum size and discharge rate with your AHJ, since the marine/fuel-dispensing rule can set a higher minimum than a standard unit (commonly cited in the 10-20 lb range), and verify it on the unit. Purple K (fastest knockdown on a gasoline or diesel fire) and CO2 (residue-free where fuel-system electronics are involved) are supplements to that compliance unit, not substitutes for it.

How often do boatyard extinguishers need service?

On the NFPA 10 schedule: a monthly visual check, annual professional maintenance by a certified technician, a 6-year internal exam for rechargeable stored-pressure units, and a hydrostatic test every 5 years for CO2, water, and AFFF or every 12 years for dry chemical. Non-rechargeable units are retired at 12 years, and any unit that has been used is recharged before it goes back out. An outdoor yard's salt air and moisture tend to condemn some units early, so budget for a rolling replacement.

Is the boatyard responsible for the extinguishers on the boats?

No. Extinguishers aboard each vessel are the boat owner's responsibility under U.S. Coast Guard rules (46 CFR for uninspected and commercial vessels, 33 CFR for recreational boats). The yard is responsible for the facility extinguishers under NFPA 303 and the adopted fire code. The two do not substitute for each other.