Emergency (Rescue) Tender - Functional Requirements

IS 949 Scope Summary: Schedule of Equipment for Fire Appliances

The scope defines the minimum equipment to be carried on fire appliances, adaptable to local conditions and chassis size.

Key Equipment & Quantities (Annex A Highlights)

Referenced IS Standards for Equipment

• IS 10245 (Part 2): Breathing apparatus
• IS 1681: Woolen blankets
• IS 274 (Parts 1 & 2): Shovels
• IS 927: Fire hooks
• IS 4770: Rubber gloves for electrical purposes
• IS 5991: Rakes
• IS 703, 704, 841: Axes, crowbars, hammers

Notes on Compliance

• Equipment quantities and types can be adjusted based on local needs.
• Rounding of numerical values per IS 2:1960.
• Equipment must meet relevant IS specifications for quality and safety.

flowchart TD
    A[Fire Appliance] --> B[Breathing Apparatus (6 sets)]
    A --> C[Protective Suits (4 Nos.)]
    A --> D[Hydraulic Tools]
    A --> E[Rescue & Safety Equipment

IS 949 - References Summary

IS 949 references several Indian Standards (IS) and equipment specifications essential for compliance and design. Key points:

Important Referenced IS Codes (Annex B)

Equipment Schedule (Annex A)

• Breathing apparatus: 6 sets (IS 10245 Pt 2)
• Protective suits: 4 Nos.
• Blankets: 6 woolen (IS 1681)
• Oxygen cylinder: 1 spare (5 litres)
• Chain lifting equipment: Various capacities (2t, 5t)
• Goggles, gloves, tarpaulins, and other rescue tools

Rounding Off (IS 2:1960)

• Numerical values must be rounded to the same significant figures as specified.

Summary Diagram: Reference Flow

graph LR
A[IS 949 Standard] --> B[Annex B: Indian Standards]
B --> C[IS 5:2007, IS 704:1984, IS 273:1990, ...]
A --> D[Annex A: Equipment List]
D --> E[Breathing Apparatus (IS 10245)]
D --> F[Protective Suits, Blankets (IS 1681)]
D --> G[Chains, Gloves, Goggles]

Use the latest editions of referenced IS codes for compliance and safety.

IS 949: General Requirements Summary

Key Specifications (Clause 5.6.7.1 - Superstructure details):

Rounding Off (IS 2:1960):

• Final test/analysis values must be rounded to the same number of significant digits as the specified values.
• Follow IS 2 rules strictly for consistency.

Additional Notes:

• Refer to Annex B for related IS standards on tools, materials, and safety equipment.
• Ensure compliance with referenced IS codes for materials and accessories.

flowchart TD
    A[General Requirements] --> B[Superstructure Dimensions]
    B --> C[Under frame cross members: 100x50x5 mm]
    B --> D[Floor longitudinal members: 50x50x6 mm]
    B --> E[Vertical members: 45x45x20 mm]
    B --> F[Skirt, Waist, Top deck: 45x45x20 mm]
    A --> G[Rounding off per IS 2:1960]

This concise summary aids in quick verification of structural member sizes and rounding rules per IS 949.

IS 949 - Materials: Key Specifications & Dimensions (Clause 5.6.7.1)

• Dimensions are width × height × thickness in mm.
• These sizes ensure adequate strength and rigidity for superstructure components.

Additional Notes:

• Materials should comply with relevant IS standards for steel quality.
• Rounding off of values must follow IS 2:1960.
• Refer to IS 10245 (Part 2) for breathing apparatus materials and IS 1681 for woolen blankets.

Quick Reference Table for Structural Members

If you need formulas for structural design (e.g., bending, shear), please specify.

IS 949: Design and Construction Key Specifications

1. Structural Member Dimensions (Clause 5.6.7.1)

2. Chassis Design (Clause 5.1)

3. Material Specification (Clause 4.5)

• No ferrous metal for nickel or chromium plated fittings.
• Plating must be of extra heavy quality.

Additional Notes:

• Use steel sections as per sizes above for superstructure.
• Design must consider loadings per vehicle weight and operational conditions.
• Refer to IS 949 for detailed welding, jointing, and corrosion protection guidelines.

graph TD
A[Chassis] --> B[Under Frame Cross Members: 100x50x5 mm]
A --> C[Floor Longitudinal Members: 50x50x6 mm]
A --> D[Vertical Members: 45x45x20 mm]
A --> E[Skirt, Waist & Top Deck Members: 45x45x20 mm]

This summarizes the key design and construction parameters per IS 949.

IS 949 - Fuel System Key Points

Fuel Tank Capacity (Clause 5.3.1)

• Small tender: Minimum 140 litres
• Large tender: Minimum 250 litres
• A fuel tank contents gauge must be fitted on the instrument panel.

Fuel Fitting Orifice (Clause 5.3.2)

• Must be ample size for easy refueling.
• Positioned for easy accessibility.
• Fuel cap must be clearly marked "Fuel".
• For petrol engines, an anti-flash device is mandatory on the cap to prevent flashback.

Equipment Related to Fuel System (Annex A & Clause 3.1)

• Includes oxygen cylinders, gauges for cutting plants, and protective gear listed for operational safety but not directly part of the fuel system.

Summary Table: Fuel Tank Capacity

Diagram: Fuel System Essentials

flowchart LR
    FuelTank[Fuel Tank (140/250 L)]
    Orifice[Fuel Fitting Orifice]
    Cap[Fuel Cap with Anti-flash Device]
    Gauge[Fuel Contents Gauge]
    DriverPanel[Instrument Panel]

    FuelTank --> Orifice --> Cap
    FuelTank --> Gauge --> DriverPanel

Note: Ensure fuel system components comply with accessibility, safety (anti-flash for petrol), and capacity requirements per IS 949.

IS 949: Electrical System Key Points (Clause 5.4 & 5.4.1)

• Electrical System Voltage: Vehicle electrical system must be either 12 V or 24 V DC.
• Alternator/Generator: A heavy-duty alternator/generator is mandatory, fitted to the engine.
• Control Unit: Alternator/generator must include the necessary control unit for regulation and protection.

Typical Specifications for Vehicle Electrical System (per IS 949):

Additional Notes:

• The alternator must be capable of supplying all electrical loads reliably.
• Control unit ensures voltage stability and prevents overcharging.
• For working voltages beyond vehicle systems (up to 33 kV), refer to IS 3.3 and related standards for cables and apparatus.

Simplified Electrical System Flow:

flowchart LR
    Engine --> Alternator[Heavy Duty Alternator/Generator]
    Alternator --> ControlUnit[Control Unit (Voltage Regulator)]
    ControlUnit --> VehicleElectricalSystem[12V or 24V DC System]

This ensures a stable DC supply for vehicle operations as per IS 949 requirements.

IS 949: Alternator and Generator Controls - Key Specifications & Formulas

Controls (Clause 5.5.5)

• Sockets & Switches:
  • 3-phase: 3 sockets with switches
  • Single-phase: 4 sockets @ 20 A MCB + 4 sockets @ 10 A MCB
• Meters:
  • RPM Meter (digital) - 1 No.
  • kW Meter - 1 No.
  • Ampere Meter (per phase) - 3 Nos.
  • Frequency Meter - 1 No.
• Protection & Control:
  • 32 A TPN MCB - 1 No.
  • Hand throttle control
  • Engine cooling water temperature gauge (if water cooled)

Alternator Specifications (Clauses 5.5, 5.5.2, 5.5.3)

• Rating: Minimum 25 kVA, 0.8 power factor (4 kW), 220 V, 3-phase, 50 Hz
• Type: Screen protected, self-regulating, self-excited, Class 'E' insulation
• Exciter: Direct coupled flange mounted exciter with automatic voltage regulation maintaining voltage within ±5% over all loads at power factors between 0.8 and 1.

Voltage Regulation Formula (approximate):

[ V = V_{no-load} - I \times Z_{eq} ] Where:

• (V) = terminal voltage at load
• (V_{no-load}) = voltage at no load
• (I) = load current
• (Z_{eq}) = equivalent impedance of alternator

Typical Metering Connections (simplified):

graph LR
    A[Alternator Output] --> B[3-Phase Ampere Meters (3 Nos.)]
    A --> C[kW Meter]
    A --> D[Frequency Meter]
    A --> E[RPM Meter]
    A --> F[Sockets & Switches]

Summary: IS 949 mandates specific control components near the generator for safety, monitoring, and regulation, with an alternator designed for stable voltage output and rated minimum 25 kVA at 220 V, 50 Hz.

IS 949 - Body Work Key Specifications and Dimensions

1. Structural Member Sizes (Clause 5.6.7.1)

2. Design Requirements (Clauses 5.9.7, 5.1, 5.13)

• Enclosure: Bodywork should enclose the appliance fully without restricting access, maintaining clean lines.
• Chassis Dimensions:

• Stability: Overturning angle ≥ 27.5° under fully loaded conditions (excluding crew).

Summary

• Use steel sections as per sizes above for body framework.
• Ensure design enclosure balances protection and accessibility.
• Maintain chassis and body dimensions within specified limits.
• Verify stability with a minimum overturning angle of 27.5°.

graph TD
  A[Body Work] --> B[Under Frame Cross Members: 100x50x5]
  A --> C[Floor Longitudinal Members: 50x50x6]
  A --> D[Vertical Members: 45x45x20]
  A --> E[Skirt, Waist, Top Deck

IS 949 - Miscellaneous Features: Key Specifications & Equipment Schedule

1. Equipment Schedule (Clause 3.1, Annex A)

• Breathing apparatus (positive pressure): 6 sets (per IS 10245 Part 2)
• Protective suits (Proximity/Chemical): 4 Nos.
• Ambu bags: 1 set
• MFR Kit: 2 sets
• Blankets (Woolen, IS 1681): 6 Nos.
• Oxygen cylinder (spare 5 litre): 1 No.
• Leather gloves: 2 pairs
• Goggles/Dark glasses: 4 pairs
• Chains & lifting equipment:
  • Lifting chain 5 t: 6 m
  • Chain-sling double leg: 1
  • Chain tackle 2 t: 1 set
• Tarpaulin: 2 Nos. (3.5 m × 3.5 m)
• Pulling/lifting machine: 2 sets (lifting 3 t or pulling 5 t)

2. Additional Tools & Equipment (Clause 3.5, Annex A)

• Hydraulic jacks: Various capacities (min 15 t to 50 t)
• Hydraulic cutters, spreaders, pumps
• Hand tools: Axes, crow bars, shovels, hammers (per IS 703, IS 704, IS 841)
• Safety equipment: Rubber gloves (IS 4770), high safety boots, goggles
• Electrical tools: Portable drills, circular saws, chain saws
• Rescue & safety: Jumping cushions, evacuation systems, inflatable boats, thermal imaging cameras

3. Referenced IS Standards for Equipment

IS 949 - Lockers and Equipment Storage: Key Specifications & Tables

1. Locker Design (Clause 5.10.1, 5.10.5, 5.10.6)

• Lockers must store all equipment from Annex A, with roll-in/roll-out drawers in a tapered opening for quick access.
• Each equipment has a designated labeled location for easy identification.
• Lockers covered with push-pull type aluminium roller shutters:
  • Made of anodized extruded aluminium sections.
  • Shutters roll inwards under the roof for unobstructed access.
• Internal lighting inside lockers:
  • Automatically switches ON/OFF with shutter operation.
  • Includes a master isolating switch.

2. Stretcher-Ladders (Clause 5.12.1)

Summary Diagram of Locker Components

graph LR
A[Locker Frame] --> B[Roll-in/Roll-out Drawers]
B --> C[Designated Equipment Slots with Labels]
A --> D[Aluminium Roller Shutter]
D --> E[Rolls Inwards Under Roof]
A --> F[Internal Lighting]
F --> G[Auto ON/OFF with Shutter]
F --> H[Master Isolating Switch]

This ensures efficient, rapid access to firefighting equipment during emergencies per IS 949 standards.

IS 949: Workmanship and Finish - Key Points

1. Stability (Clause 5.13)

• Appliance must resist overturning up to a tilt angle of 27.5° under fully equipped and loaded conditions (excluding crew).

2. Workmanship (Clause 6.1)

• Mechanical parts must be manufactured for easy replacement and proper fit.
• High-quality finish ensuring durability and serviceability.

3. Structural Member Specifications (Clause 5.6.7.1 - Table)

4. Finishing (Clause 4.5)

• No ferrous metals for nickel/chromium plated fittings.
• Plating must be extra heavy quality for corrosion resistance.

Summary Diagram of Member Placement

graph TB
  A[Under Frame Cross Members<br>100x50x5] --> B[Floor Longitudinal Members<br>50x50x6]
  B --> C[Vertical Members on Even Side<br>45x45x20]
  C --> D[Skirt Member<br>45x45x20]
  D --> E[Waist Member<br>45x45x20]
  E --> F[Top Deck Longitudinal<br>45x45x20]

This ensures structural integrity, ease of maintenance, and aesthetic finish per IS 949 standards.

IS 949: Instruction Book and Accessories - Key Points

Instruction Book (Clause 7.1)

• Must provide operating and maintenance procedures.
• Include an itemized, illustrated spare parts list referencing all wearing parts.
• Essential for user guidance and equipment upkeep.

Painting & Phosphating (Clause 6.6)

• Chassis painting/phosphating must withstand tropical climatic conditions.

Accessories & Equipment Schedule (Clause 3.1 & Annex A)

• Equipment list varies by local conditions; chassis size may adjust accordingly.
• Typical accessories include:

Referenced IS Standards (Annex B)

• Paints: IS 5:2007
• Protective gloves: IS 4770:1991
• Breathing apparatus: IS 10245 (Part 2)
• Woolen blankets: IS 1681:1998
• Others for tools and accessories (axes, shovels, hammers, etc.)

Summary Diagram: Instruction Book & Accessories Flow

flowchart TD
    A[Instruction Book] --> B[Operating Procedures]
    A --> C[Maintenance Procedures]
    A --> D[Spare Parts List]
    E[Accessories] --> F[Breathing Apparatus]
    E --> G[Protective Suits]
    E --> H[Gloves & Goggles]
    E --> I[Chains & Lifting Equipment]
    E --> J[Miscellaneous Tools]

IS 949 - Committee Composition & Key Specifications

• Committee Composition:
  The detailed composition of the Fire Fighting Sectional Committee (CED 22) responsible for IS 949 is provided in Annex C of the standard. This includes experts from various stakeholder groups ensuring comprehensive standard formulation.

• Key Structural Specifications (Clause 5.6.7.1 - Body Work):

• Note: Dimensions are width × depth × thickness (mm).

This ensures uniformity in fire fighting vehicle body construction per IS 949 requirements.

graph TD
    A[Committee CED 22] --> B[Experts from Industry]
    A --> C[Government Representatives]
    A --> D[Academia]
    A --> E[Testing Agencies]
    F[Annex C] --> A

For detailed committee member names and roles, refer to Annex C of IS 949.

IS 949 - Referenced Standards Summary

Annex B lists Indian Standards referenced in IS 949, which form integral provisions. Key IS codes include:

Important Notes:

• Rounding off: Follow IS 2:1960 for numerical rounding.
• Refer to the latest editions of these standards for compliance.
• These referenced standards cover tools, protective equipment, cables, and fire-fighting accessories.

Visual: Reference Flow

graph LR
A[IS 949] --> B(Annex B: Referenced IS Codes)
B --> C[Tools: Picks, Shovels, Hammers]
B --> D[Protective Equipment: Gloves, Respiratory Devices]
B --> E[Electrical: Cables, Insulation]
B --> F[Fire Fighting Accessories]

For detailed specifications, refer directly to the respective IS codes listed in Annex B.