‘A’ Self-Closing Sliding Watertight Fire Door Sign

‘A’ Self-Closing Sliding Watertight Fire Door Sign – IMO A.654(16) Fire Control Symbol FS0237

This ‘A’ Self-Closing Sliding Watertight Fire Door sign identifies a sliding door built to A-class fire integrity with full watertight closure, fitted with a mechanism that closes the door automatically along its track rather than requiring a hinged self-closer. The pictogram shows the “WT” designator with a directional arrow above the offset bar and dashed track symbol used on IMO fire control plans to denote a self-closing sliding door, matching exactly what appears on the plan for this opening. As SKU FS0237 in the Fire Fighting Signs range, it is designed for permanent fixing on or beside power-operated or spring-assisted sliding watertight fire doors at structural boundaries and machinery space accesses.

Self-closing sliding watertight doors are typically found where a hinged door would obstruct a passageway but full watertight integrity is still required, such as machinery space boundaries and main vertical zone divisions on vessels with restricted internal clearances. Because the door closes automatically along its track, it restores both its fire integrity and watertight closure without crew needing to operate it manually, which is particularly important on doors that see frequent traffic throughout the day. The photoluminescent background of this sign keeps the door’s function identifiable during a blackout, when confirming a sliding door has closed correctly is hardest to do visually.

Why Self-Closing Sliding Watertight Fire Door Identification Matters

Crew need to recognise this specific door type because self-closing sliding mechanisms carry their own hazards and operating procedures distinct from hinged fire doors, including remote control stations, warning alarms and closing speed considerations that a hinged self-closer does not have. Correct signage supports safe passage through the opening and reminds crew never to obstruct the door’s track or sliding path, since doing so can jam the mechanism and defeat both its fire and watertight function. This distinction matters most in machinery space boundaries where a failed self-closing sliding door represents a significant gap in the vessel’s fire and watertight integrity.

Compliance and Certification

This sign reproduces the fire control symbol set derived from IMO Resolution A.654(16) and continued under the current ISO 17631 standard for fire control plan graphics, matching what flag-state surveyors and classification societies expect to see identifying self-closing sliding watertight fire door function. SOLAS Chapter II-2 and Chapter II-1 set the fire integrity and watertight standards this door must meet, and correctly labelled sliding door arrangements, including their self-closing test records, are checked during Port State Control inspections and class surveys. Fitting SKU FS0237 keeps your sliding door signage matched to the fire control plan surveyors will review.

Installation Recommendations

Fix this sign directly on or beside the sliding door frame or track housing at eye level, using the pre-drilled fixing holes for a permanent mechanical fixing on steel structures, or the self-adhesive backing where a mechanical fixing is impractical. Position the sign clear of the door’s sliding path, guide rails and any local control stations, and in machinery space surrounds a screw or rivet fixing will outlast adhesive in heat, vibration and oily conditions. Check the sign periodically alongside the self-closing mechanism during routine fire and watertight door testing rounds.

• Standard IMO/ISO 17631 fire control symbol – “WT” designator with self-closing sliding track symbol
• Photoluminescent base for visibility during blackout or power failure
• 150x150mm rigid or self-adhesive format to suit steel door and frame surfaces
• UV-stable, corrosion-resistant construction for machinery boundary and structural opening use
• Matches fire control plan symbols exactly for fast, confident door mechanism identification

Order the FS0237 ‘A’ Self-Closing Sliding Watertight Fire Door sign to keep every self-closing sliding boundary on your vessel correctly identified before your next drill or survey. Safety Sign Hub stocks the complete IMO fire control symbol range and ships marine-grade signage across Australia and to vessels in port.

Browse the full Fire Fighting Signs range for every fire control plan symbol your vessel needs, or see our Hazard Signs for ISO 7010 warning pictograms to complete your safety signage programme.

This self-closing sliding watertight fire door sign confirms the door’s self-closing watertight function, helping crew and class surveyors verify correct fitting during fire drills and inspections. See our full range of fire fighting signs for complete vessel fire safety marking.