‘A’ Class Sliding Fire Door Sign

‘A’ Sliding Fire Door Sign

An a class sliding fire door sign identifies a fire door built to the ‘A’ class rating that operates on a sliding track rather than a hinged leaf, typically found across engine room bulkhead penetrations, watertight-adjacent fire boundaries, and machinery space access routes where a swinging door would foul cabling, piping, or a narrow passage. FS0148 marks that specific door type so crew and visiting contractors know both the fire rating and the operating mechanism before they approach it.

This sign is cross-referenced to IMPA 33.6034 and ISSA 47.560.34, and is supplied in two sizes, 150x150mm and 300x300mm, to suit both a standard machinery space door and a larger bulkhead opening. Clear identification of an a class sliding fire door sign at every relevant location supports the vessel’s fire zone plan and helps crew locate the correct boundary quickly during a drill or an actual incident.

Because sliding fire doors are often power-operated and can close automatically on a fire alarm signal, marking them clearly also warns anyone working nearby that the door may move without a hand on it, which is a distinct safety consideration compared with a manually operated hinged fire door.

Typical Locations for Sliding ‘A’ Class Doors

FS0148 is most often fitted at engine room and machinery space bulkhead openings, at fire zone boundaries along main passageways where a sliding mechanism suits the available headroom and floor space, and at watertight-adjacent openings where a hinged door would conflict with the sliding watertight door already installed in the same bulkhead. It is also used at cargo pump room access points on tankers, where the fire boundary and the space constraints both call for a sliding rather than hinged arrangement.

Durable Signage for Fire Boundary Doors

Like the rest of the fire fighting signage range, FS0148 is manufactured as standard on photoluminescent (glow-in-the-dark) fire-retardant marine-grade material, built to withstand the heat, vibration, and frequent operation cycles typical of a machinery space fire door while remaining visible if power and emergency lighting are both lost. The graphic is protected against fading under engine room lighting and resists the oil and grime common to that environment. Both 150x150mm and 300x300mm formats are available in Class C or Class D vinyl to match the fire safety plan specification for your vessel.

Mounting Options and Compliance

FS0148 can be supplied as a self-adhesive label for direct application to the door leaf or adjacent bulkhead, or as a rigid panel for a more permanent fixed mount where the sign needs to withstand heavier handling near a busy machinery space entrance. Correctly marking every a class sliding fire door sign on a vessel’s fire control plan is a documentation and inspection matter that class surveyors check during survey, consistent with the general workplace safety and hazard identification principles set out by Safe Work Australia. It is listed in the Fire Fighting Signs category alongside the full range of ‘A’ class door and division signage, so a complete fire zone marking schedule can be sourced together.

Ordering for New-Build and Refit Schedules

Sliding fire doors are typically installed in smaller numbers than standard hinged doors on a given vessel, so FS0148 is often ordered as a targeted quantity matched to the actual door count on the fire control plan rather than a bulk stock item. Quoting against IMPA 33.6034 and ISSA 47.560.34 lets a yard or ship management company confirm the exact a class sliding fire door sign before it is fitted during a new-build programme or a scheduled dry dock, avoiding the mismatch that can occur when door type and sign type are ordered from separate suppliers.