Understanding Fire Alarm Drawing Symbols
Fire alarm drawing symbols are a crucial component of any fire alarm system. They help to identify and track different fire alarm devices and components, allowing engineers to quickly assess the layout of a system and identify any potential issues. Knowing the different symbols used in fire alarm drawings is a key part of being able to effectively read and interpret fire alarm plans. In this article, we’ll explain the different types of fire alarm drawing symbols and what they mean.
Types of Fire Alarm Drawing Symbols
Fire alarm drawing symbols are divided into four main categories: identifier symbols, device symbols, connection symbols, and miscellaneous symbols. Identifier symbols are used to show the location of fire alarm devices, while device symbols are used to show the type of fire alarm device. Connection symbols are used to show how the different components of a fire alarm system are connected, and miscellaneous symbols are used to show other items such as doors, windows, and furniture.
Identifier Symbols
Identifier symbols are used to identify the location of a fire alarm device. These symbols can include a number, letter, or combination of both. They are used to identify the floor, room, and area in which a fire alarm device is located. They are also used to identify a specific fire alarm device, such as a smoke detector or alarm bell.
Device Symbols
Device symbols are used to identify the type of fire alarm device. These symbols typically consist of a square or circle with a letter or number inside. Common device symbols include:
• A – Alarm bell
• B – Smoke detector
• C – Heat detector
• D – Manual call point
• E – Fire sprinkler
• F – Flame detector
• G – Gas detector
Connection Symbols
Connection symbols are used to show how the different components of a fire alarm system are connected. These symbols typically consist of a line with an arrow pointing in the direction of the connection. Common connection symbols include:
• Arrow – Line indicating power or data flow
• Circle – Line indicating signal flow
• Cross – Line indicating connection between two components
• Double-arrow – Line indicating power or data flow in both directions
• Double-circle – Line indicating signal flow in both directions
• Double-cross – Line indicating connection between two components in both directions
Miscellaneous Symbols
Miscellaneous symbols are used to show items that are not fire alarm devices, such as doors, windows, and furniture. These symbols typically consist of a line with a symbol inside. Common miscellaneous symbols include:
• Door – Line with a door symbol inside
• Window – Line with a window symbol inside
• Furniture – Line with a furniture symbol inside
• Stairs – Line with a stairs symbol inside
• Exit – Line with an exit symbol inside
• Elevator – Line with an elevator symbol inside
Conclusion
Understanding the different fire alarm drawing symbols is essential for reading and interpreting fire alarm plans. Identifier symbols are used to identify the location of a fire alarm device, device symbols are used to identify the type of fire alarm device, connection symbols are used to show how the different components of a fire alarm system are connected, and miscellaneous symbols are used to show other items such as doors, windows, and furniture. The ability to read and interpret fire alarm plans is a key part of being able to effectively design, install, and maintain a fire alarm system.
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