Graphic symbols for fire protection plans

IS 12407 - Scope Summary & Key Symbol Tables

Scope (Clause 2.1):
Defines symbols for fire protection equipment categories using basic geometrical shapes combined with supplementary elements to indicate content or activation method.

Key Tables:

Table 1: Basic Geometrical Shapes for Equipment Categories

Table 2: Supplementary Symbol Elements (Enclosed within basic shapes)

Table 3: Symbols Used Alone

Usage Notes:

• Combine basic shape + supplementary element for detailed identification (e.g., portable extinguisher with CO2: circle + CO2).
• Symbols assist in fire safety plan legends for clear communication.

flowchart LR
    A[Basic Shape] --> B[Supplementary Element]
    B --> C[Complete Symbol]
    C --> D[Fire Safety Plan Legend]

Summary: IS 12407 uses standardized symbols combining shapes and elements to represent fire safety equipment and systems clearly on plans, covering portable/wheeled extinguishers, fixed systems, detectors, alarms, and risk zones.

IS 12407: Symbols and Their Categories

1. Basic Geometrical Shapes (Table 1, Clause 2.1)

2. Supplementary Symbol Elements (Table 2, Clause 2.1)

IS 12407 - Basic Geometrical Shapes & Symbols for Fire Safety Equipment

Key Highlights from Clause 2.1 - 2.3:

Table 1: Basic Geometrical Shapes (Clause 2.1)

• Portable Fire Extinguisher: Circle
• Wheeled Fire Extinguisher: Square
• Fixed Fire Extinguishing System (Total protection): Triangle
• Fixed Fire Extinguishing System (Local application): Inverted Triangle
• Miscellaneous Fire Fighting Equipment: Pentagon
• Control & Indicating Equipment: Hexagon
• Alarm Initiating Devices: Diamond
• Linear Detector: Line symbol
• Special Risk Area or Room: Crossed square

Table 2: Supplementary Symbols (Clause 2.1)

• Water: Wavy line or water drop symbol
• Foam: Bubble cluster
• Powder (Ordinary): Dotted pattern
• Metal Powder: Cross-hatched pattern
• CO2: CO2 text or gas cylinder symbol
• Valve: Valve symbol (circle with a line)
• Heat: Letter "I"
• Smoke: Number "5"
• Flame: Letter "A"
• Manual Actuation: Letter "Y"
• Bell: Letter "R"
• Telephone: Number "8"
• Illuminated Signal: Number "9"

Table 3: Symbols Used Alone (Clause 2.2)

• Water Bucket: Bucket symbol
• Sand Bucket: Bucket with sand texture
• Pillar Hydrant: Vertical bar with number of outlets shown as bars
• Ground Hydrant: Horizontal bar

Table 4: Examples (Clause 2.3)

• Combines basic shapes with supplementary symbols to represent specific equipment like:
  • Water Portable Extinguisher = Circle + Water symbol
  • Wheeled BC Powder Extinguisher = Square + Powder symbol
  • Smoke Detector (point type) = Diamond + Smoke symbol
  • Manual Control of Water System = Triangle + Manual actuation symbol

Summary Table (Sample)

IS 12407 - Symbols Used Alone (Clauses 2.1 to 2.3)

Key Tables & Symbols Summary

Table 1: Basic Geometrical Shapes (Clause 2.1)

Table 2: Supplementary Symbols (Clause 2.1)

Note: Supplementary symbols are enclosed within basic shapes to specify type and activation.

Table 3: Symbols Used Alone (Clause 2.2)

Table 4: Examples of Symbols (Clause 2.3)

IS 12407 - Examples of Symbols for Fire Fighting Equipment

1. Basic Geometrical Shapes (Clause 2.1, Table 1)

2. Supplementary Symbol Elements (Clause 2.1, Table 2)

3. Examples of Complete Symbols (Clause 2.3, Table 4)

Usage Notes:

• Basic shapes define equipment category.
• Supplementary elements specify extinguishing media, activation type, or detection method.
• Symbols are combined (shape + element) for clear representation on plans.
• Some symbols (e.g., pillar hydrant) use bars to indicate number of outlets.

graph TD
A[Basic Shape] --> B

IS 12407 - Methods of Symbol Reproduction (Clause 2.4 and related tables)

Key Points on Symbol Reproduction:

• Symbols are designed for manual or machine drafting.
• Can be reproduced using templates or dry transfer methods.
• Symbols must be clear and consistent for fire protection drawings.

Important Tables for Symbols:

Symbol Usage Notes:

• Supplementary symbols (Table 2) are combined with basic shapes to specify extinguishing media or device types.
• Symbols like Water (●), Powder (■), CO2 (▲) are standardized.
• Special symbols (e.g., Manual actuation = Y, Flame = A) help clarify control and hazard types.
• Escape routes and hydrants have distinct symbols indicating outlets.

Summary Table Example (from Table 2):

Diagram: Symbol Reproduction Methods

flowchart LR
    A[Symbol Design] --> B[Manual Drafting]
    A --> C[Machine Drafting]
    B --> D[Template Method]
    B --> E[Dry Transfer Method]
    C --> F[CAD Software]

In brief: IS 12407 mandates clear, reproducible symbols for fire safety equipment using standard templates or drafting techniques, supported by detailed symbol tables for consistency.

IS 12407: Legend and Definition of Symbols

Key Points from Clauses 2.1 to 2.5:

• Clause 2.5: All symbols must be clearly defined in a legend for easy understanding.
• Clause 2.1: Provides tables of symbols for firefighting equipment and supplementary elements.
• Clause 2.2 & 2.3: Additional symbols used alone or as examples.

Important Symbol Tables Summary:

SI No.	Equipment Category	Symbol Example(s)
1	Portable fire extinguisher
2	Wheeled fire extinguisher
4	Fixed fire extinguishing system (local)
9	Linear detector
13	Special risk area or room
1 (Suppl.)	Water
3 (Suppl.)	Powder ordinary
6 (Suppl.)	Carbon dioxide (CO2)
8 (Suppl.)	Valve
15 (Suppl.)	Manual actuation	Y
19 (Suppl.)	Telephone	8
21 (Suppl.)	Combustible materials	1

Legend Format (Recommended):

• Symbol — Meaning
• Example:
  • 🔥 — Flame
  • W — Water
  • CO2 — Carbon dioxide extinguisher
  • Y — Manual actuation

Usage Tips:

• Define all symbols used on plans in a legend per Clause 2.5.
• Use standard symbols from Tables 1, 2, 3, and 4 for consistency.
• For gases other than Halon or CO2, define explicitly in the legend.

Visual Summary (Mermaid.js):

graph TD
A[Firefighting Equipment] --> B[Portable Extinguisher]
A -->

IS 12407 - Symbol Size and Scale Key Points

• Clause 2.6: All symbols on a drawing must be to the same relative scale and consistent with the drawing's scale.
• Symbols should be clear and reproducible by hand or machine drafting (Clause 2.4).

Symbol Size & Scale Guidelines:

• Maintain uniform symbol size relative to the drawing scale.
• Typical symbol sizes range from 6 mm to 12 mm height for clarity.
• Scale of symbols = (Symbol size on drawing) / (Actual size) must be constant.

Key Tables for Symbols (Clause 2.1 & 2.3):

Supplementary Elements (Table 2):

Summary Diagram of Symbol Scale Concept:

flowchart LR
    A[Drawing Scale] --> B[Uniform Symbol Scale]
    B --> C{Symbol Size}
    C --> D[Maintain clarity]
    C --> E[Consistent across drawing]
    D --> F[6-12 mm typical size]

Ensure all symbols are legible and consistently scaled relative to the drawing size for effective communication.