IS 947:1985 is the Indian Standard (BIS) for functional requirements for towing tender for trailer fire pump for fire brigade use. This standard lays down the functional requirements, design, and performance criteria for towing tenders used by fire brigades. These vehicles are primarily used to transport fire fighting crew, carry essential hoses and equipment, and safely tow trailer fire pumps to incident sites.
Functional Requirements for Towing Tender for Trailer Fire Pump for Fire Brigade Use
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Acceleration (from standstill) | 0 to 56 km/h in 35 seconds | 0 to 56 km/h (35 mph) in 25 seconds | NFPA 1901 |
| Maximum Speed (on level road) | Minimum 80 km/h | Minimum 80 km/h (50 mph) | NFPA 1901 |
| Crew Capacity | 6 persons (including driver) | Specified by purchaser; must have a dedicated seat and seatbelt for each individual. | NFPA 1901 |
| Grade Holding Ability (Fully Loaded) | Capable of climbing a gradient of 1 in 4 (25%) | Must be able to start and hold on a 20% grade. EN 1846-2 requires holding on a 25% grade for Urban-class vehicles. | NFPA 1901 / EN 1846-2 |
| Static Stability (Tilt Angle) | Not specified | Minimum 27 degrees for Urban-class vehicles on a tilt table without overturning. | EN 1846-2 |
| Road Clearance | Not less than 255 mm | Not specified as a single value; defined by approach, departure, and ramp-over angles based on vehicle class. | EN 1846-2 |