A-60 Class Single leaf Fireproof Door (Without Sill)

A-60 Class Single leaf Fireproof Door (Without Sill)

Product Introduction:

The A-60 Class Single Leaf Fireproof Door (without Sill) is a specialized marine-rated fire protection solution designed for ships, offshore platforms, FPSO units, and other maritime vessels where a flush floor surface is required. Meeting the stringent requirements of the International Convention for the Safety of Life at Sea (SOLAS) and the International Maritime Organization (IMO), this door provides up to 60 minutes of fire and smoke containment while eliminating the bottom sill or threshold that is standard on conventional marine fire doors. The sill‑free design allows for smooth, trip‑free passage of wheeled equipment, pallet jacks, stretchers, and personnel, making it ideal for areas where continuous floor traffic or barrier‑free access is essential.

Constructed from heavy-gauge steel with a non-combustible insulation core—typically high-density ceramic fiber or rock wool—the A-60 Class Single Leaf Fireproof Door delivers exceptional thermal resistance and structural integrity under extreme fire conditions. During a fire, the insulation core limits temperature rise on the non-fire side, while intumescent seals expand to block the passage of smoke and hot gases. The absence of a sill is compensated by a specially engineered bottom sealing system, typically a gravity‑operated or spring‑assisted drop seal that deploys when the door closes, maintaining fire and smoke integrity at the floor line without creating a raised obstacle.

The single leaf configuration features a self-closing hinge mechanism that automatically returns the door to a closed position after each use, a mandatory requirement for A‑class fire‑rated marine doors. A heavy‑duty compression locking system secures the door tightly against the steel frame. The sill‑free design requires precise floor preparation and close tolerance between the door bottom and the finished deck surface to ensure proper seal activation. An optional marine‑rated porthole (with fire‑resistant glass) allows visual inspection without compromising safety. For additional protection, the door can be specified as weathertight to prevent ingress of spray or light water. All exposed surfaces are treated with marine‑grade anti‑corrosion primer and can be finished with epoxy or polyurethane paint for enhanced durability in harsh marine environments.

Product parameters:

Key Features:

*A-60 fire rating – Provides 60 minutes of fire and smoke containment per SOLAS/IMO standards

*Sill‑free design (no threshold) – Flush floor surface for trip‑free passage and wheeled equipment access

*Single leaf configuration – Space‑saving design for standard bulkhead openings

*Heavy-gauge steel construction – Withstands high temperatures, impact, and mechanical stress

*Non-combustible insulation core – High-density ceramic fiber or rock wool for thermal protection

*Bottom drop seal – Gravity or spring‑assisted seal deploys upon closure to maintain fire/smoke integrity

*Intumescent smoke seals – Expand under heat to block smoke passage around perimeter

*Self-closing hinges – Automatic return to closed position for safety compliance

*Compression locking system – Ensures tight, secure closure

*Corrosion-resistant finish – Marine-grade primer plus optional epoxy or polyurethane coating

*Optional marine porthole – Fire-resistant glass for visual access

*Optional weathertight construction – Prevents moisture ingress for exposed locations

Typical Applications:

*Hospital and medical bay access on ships (gurney passage)

*Vessel galley and food service areas (cart traffic)

*Machinery workshop entrances (tool and equipment movement)

*Offshore platform logistics corridors

*Passenger vessel barrier‑free accessibility routes

*Cargo ship storage and handling areas

*Naval vessel supply and ordnance passages

*Any marine compartment requiring stretcher, trolley, or pallet jack access

For shipbuilders, marine engineers, and offshore facility managers who need a SOLAS/IMO‑compliant A-60 fire door without the obstruction of a bottom sill, the A-60 Class Single Leaf Fireproof Door (without Sill) offers a robust, accessible, and code‑compliant solution. Its combination of full A-60 fire protection, flush floor access, and marine‑grade durability makes it the ideal choice for modern vessel designs that prioritize both safety and operational efficiency.