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NFPA 1901 (and its successor NFPA 1900) apparatus flooring requirements focus primarily on slip resistance for firefighter safety.

NFPA 1901 (and its successor NFPA 1900) apparatus flooring requirements focus primarily on slip resistance for firefighter safety.

Background and Current Status

NFPA 1901 was the long-standing Standard for Automotive Fire Apparatus. The last standalone edition was 2016. As part of NFPA’s document consolidation, its content (along with related standards for wildland apparatus, aircraft rescue vehicles, and ambulances) was combined into NFPA 1900 (2024 edition): Standard for Aircraft Rescue and Firefighting Vehicles, Automotive Fire Apparatus, Wildland Fire Apparatus, and Automotive Ambulances.

The slip-resistance provisions for walking, standing, and stepping surfaces that originated in NFPA 1901 continue under the consolidated standard.

Core Slip-Resistance Requirements

The standard sets quantitative minimums for surfaces on the apparatus itself (not building floors). Key requirements from the 2016 edition of 1901 (widely cited and carried forward in principle) include:

  • Exterior surfaces designated for stepping, standing, or walking (including running boards, platforms, steps, and similar areas): Minimum slip resistance of 0.68 when wet, measured with the English XL Variable Incidence Tribometer (VIT) per ASTM F1679. Alternative: 0.52 when wet with the Brungraber Mark II Portable Inclinable Articulated Strut Tester (PIAST) per ASTM F1677.
  • Interior walking and standing surfaces (including floors and steps inside the cab or compartments): Minimum of 0.58 (English XL) or 0.47 (Brungraber Mark II).
  • Certification: The apparatus manufacturer/contractor must supply certification that the materials used for these surfaces meet the requirements.

These values apply in any orientation and are intended to address real-world conditions—wet, soapy, oily, or contaminated surfaces that firefighters encounter while climbing on or working around apparatus during emergency responses, training, or maintenance.

Why These Numbers Matter

Fire apparatus surfaces are frequently exposed to water from hose operations, weather, washing, decontamination solutions, oils, and debris. A high wet coefficient of friction reduces the risk of slips and falls for personnel wearing heavy gear, often in low-visibility or high-stress conditions. The English XL VIT method (a variable-incidence tribometer) is particularly relevant because it measures friction under dynamic, angled conditions that better approximate real foot-surface interaction than purely static tests.

The 0.68 wet value is deliberately rigorous—higher than many general building or industrial flooring recommendations (e.g., the common 0.50–0.60 SCOF guidelines or the ANSI A326.3 wet DCOF ≥ 0.42 baseline for level interior hard surfaces).

Relevance to Building Floors and Resinous Systems

NFPA 1901/1900 requirements apply specifically to the apparatus itself, not to the floors of fire stations or apparatus bays. However, the 0.68 wet COF figure is frequently referenced by high-performance flooring manufacturers as a demanding high-traction benchmark for safety-critical or wet environments.

In the context of resinous polymer floors (epoxy, urethane, polyaspartic, urethane cement systems):

  • Manufacturers such as Elite Crete Systems list the NFPA 0.68 value alongside ADA guideline targets (0.60 flat / 0.80 inclined) and OSHA 0.50 in their technical literature. Their systems are designed with adjustable coefficient of friction (typically achieved through aggregate broadcasts—quartz, aluminum oxide, etc.—and textured topcoats) so that finished floors can be engineered to meet or exceed these higher traction levels.
  • Elite Crete specifically markets HERMETIC™ Fire Apparatus Flooring Systems for apparatus bay floors. These seamless, fluid-applied resinous systems emphasize slip resistance even when wet, high abrasion/impact resistance (to withstand heavy trucks and equipment), chemical and stain resistance (oils, fuels, cleaners), antimicrobial properties, easy cleanability, and optional customization (logos, striping, equipment demarcation). They also note VOC-free / CA 01350 compliance and durability under the demanding conditions of a fire station.

In practice, a resinous system installed in a fire station bay can be specified with a texture package that delivers traction comparable to the apparatus standard, providing continuity of safety performance from the vehicle surfaces to the surrounding floor.

Practical Considerations

  • Test methods matter: Results from different tribometers (English XL, Brungraber, BOT-3000E for DCOF, etc.) are not directly interchangeable. Specifiers should reference the exact method used in the standard or manufacturer data.
  • Maintenance: Even high-traction surfaces can lose performance if heavily contaminated or if texture wears; proper cleaning protocols are essential.
  • Not a universal building requirement: For general commercial or industrial floors, slip resistance is governed by a combination of ADA (qualitative “slip-resistant” requirement plus ramp design rules), ANSI A326.3 (DCOF), OSHA general duty, and project-specific specifications—not NFPA 1901/1900.

In short, the NFPA 1901 (now 1900) apparatus flooring provisions establish one of the higher published wet-traction thresholds in the fire service standards. They serve both as a direct safety requirement for the vehicles themselves and as a useful performance target for demanding resinous flooring applications, particularly in fire stations and other environments where wet, contaminated, high-traffic conditions are routine.