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IS 956:2004 is the Indian Standard (BIS) for functional requirements for rescue tender for air fields. This standard specifies the functional, operational, and equipment requirements for rescue and fire fighting tenders designed specifically for airfield use. It outlines chassis specifications, vehicular performance metrics like acceleration and off-road mobility, and the minimum extinguishing media and rescue equipment required to handle aircraft emergencies.
Functional Requirements for Rescue Tender for Air Fields
! Vehicles must meet stringent acceleration and top speed requirements to comply with International Civil Aviation Organization (ICAO) response time mandates.
! Weight distribution is critical; the fully laden vehicle must maintain stability during high-speed turns on airfield terrain.
! Pumps and monitors must be capable of discharging foam and water while the vehicle is in motion (pump-and-roll capability).
waterfoamdry chemical powderaluminumsteel
International Equivalents
Similar International Standards
NFPA 1900:2024National Fire Protection Association (NFPA), USA
HighCurrent
Standard for Aircraft Rescue and Firefighting Vehicles, Automotive Fire Apparatus, Wildland Fire Apparatus, and Automotive Ambulances
Chapter 5 on ARFF vehicles covers the performance and equipment for combined rescue and firefighting, which is the international norm.
ICAO Airport Services Manual (Doc 9137), Part 1International Civil Aviation Organization (ICAO), International
HighCurrent
Rescue and Fire Fighting
Provides the foundational guidance and recommended practices for aerodrome RFF services, vehicle characteristics, and response times worldwide.
NFPA 414:2020National Fire Protection Association (NFPA), USA
HighWithdrawn
Standard for Aircraft Rescue and Fire-Fighting Vehicles
This was the primary US standard for ARFF vehicles, detailing requirements for vehicles that perform the same rescue function.
EN 1846-2:2009+A1:2013European Committee for Standardization (CEN), Europe
MediumCurrent
Firefighting and rescue service vehicles - Part 2: Common requirements - Safety and performance
Specifies general safety and performance for the chassis of rescue vehicles, though not specific to airfield operations.
Key Differences
≠IS 956 specifies a dedicated 'Rescue Tender' without primary firefighting agents, whereas international standards like NFPA 1900 focus on combined 'Aircraft Rescue and Fire-Fighting' (ARFF) vehicles carrying large quantities of water/foam alongside rescue tools.
≠Vehicle performance requirements in IS 956 are less stringent; for example, it requires 0-80 km/h acceleration in 50 seconds, while NFPA 1900 requires the same in 25-35 seconds depending on vehicle size.
≠IS 956 is prescriptive, listing specific equipment and capacities (e.g., 'cutter force of 30 tonnes'). NFPA standards are more performance-based, often referencing other standards (like NFPA 1936 for rescue tools) that classify equipment by capability rather than a single metric.
≠The Indian standard defines a single type of rescue tender, whereas ICAO and NFPA standards define multiple categories of vehicles based on the airport's size and the corresponding quantity of firefighting agent required.
Key Similarities
≈The fundamental purpose is identical: to provide a rapid response vehicle carrying specialized equipment and personnel to an aircraft incident for the extrication and rescue of occupants.
≈Both IS 956 and international equivalents mandate a robust, all-wheel-drive chassis capable of high speed on paved surfaces and effective off-road travel to reach any point on the airfield.
≈The core set of required rescue equipment is very similar, including hydraulic cutters and spreaders, pneumatic lifting bags, stabilization tools, portable lighting, and power generation.
≈All standards are built around the ICAO-recommended critical response time, which drives the need for high vehicle performance and reliability.
Parameter Comparison
Parameter
IS Value
International
Source
Acceleration (0-80 km/h)
Within 50 seconds
≤ 25-35 seconds (depending on vehicle agent capacity)
NFPA 1900:2024
Maximum Speed (on paved, level road)
≥ 100 km/h
≥ 105 km/h (65 mph)
NFPA 1900:2024
Static Side Slope Stability
≥ 28 degrees
≥ 30 degrees (fully loaded)
NFPA 1900:2024
Crew Seating Capacity (minimum)
6 persons (including driver)
No specific number; requires seating for all assigned personnel.
NFPA 1900:2024
On-board Electric Generator
≥ 5 kVA
No minimum capacity specified; must be sufficient to power all connected equipment simultaneously.
NFPA 1900:2024
Hydraulic Rescue Tool (Cutter)
Specifies a minimum cutting force of 30 tonnes.
Requires tools to meet NFPA 1936, which uses a performance classification system (e.g., A7/B9/C7).
NFPA 1900 (ref. NFPA 1936)
⚠ Verify details from original standards before use
Key Values5
Quick Reference Values
Drive configuration4x4 or 6x6 for off-road mobility
Minimum top speed> 100 km/h for rapid response
Acceleration (0-80 km/h)Typically within 25 to 40 seconds depending on category
Approach and departure anglesMinimum 30 degrees
Minimum ground clearanceNot less than 350 mm under the axles
Tables & Referenced Sections
Key Tables
No tables data
Key Clauses
No clauses data
Frequently Asked Questions3
What distinguishes an airfield rescue tender from a standard fire engine?+
Airfield tenders require significantly higher acceleration, top speeds, off-road capabilities (4x4/6x6), and specialized extinguishing media combinations (AFFF and DCP) specifically for aircraft fuel fires.
What are the primary extinguishing media carried?+
They primarily carry large volumes of water and foam compound for fuel fires, supplemented by dry chemical powder or complementary agents for engine/electrical fires.
Do these vehicles need off-road capabilities?+
Yes, they must be capable of navigating soft ground, ditches, and uneven terrain surrounding airfields to reach a crashed aircraft, requiring high ground clearance and specific approach/departure angles.