GB/T 23809.1-2020 in English
VALIDEmergency guidance systems—Setting principles and requirements—Part 1: Inside buildings
- Issued on:2020-03-31
- Implemented on:2020-10-01
- File Format:PDF
- Delivery:Via email within 5 business days
$582.00
| Standard No: | GB/T 23809.1-2020 |
| Document status: | VALID |
| Title in English: | Emergency guidance systems—Setting principles and requirements—Part 1: Inside buildings |
| Title in Chinese: | 应急导向系统 设置原则与要求 第1部分：建筑物内 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2020-03-31 |
| Implemented on: | 2020-10-01 |
| Superseding: |
GB/T 23809-2009 Safety way guidance systems—Setting principles and requirements
|
| ICS Classification: | 01.080.01-Graphical symbols in general |
| Chinese Classification: | A22-Terms and Symbols |
| Professional Classification: | GB-National Standard |
| Related Topics: | GB/T 23809.1
GB/T 23809.1-2020 effect-oriented analysis |
《GB/T 23809.1-2020应急导向系统 设置原则与要求 第1部分：建筑物内》由TC59（全国图形符号标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Core design principles of emergency guidance systems
According to the GB/T 23809.1-2020 standard, emergency guidance systems in buildings must achieve the following goals:
- Maintain visual continuity in power outages or smoke environments
- Ensure the brightness contrast ratio between evacuation route signs and the surrounding environment>3:1
- Phosphorescent elements must meet the requirement of continuous luminescence for 60 minutes
Comparison of technical requirements for key elements
| Element type | Minimum brightness requirement | Installation spacing | Applicable scenarios |
|---|---|---|---|
| Electric light source evacuation sign | ≥500cd/m² | ≤10m | High-position installation area |
| Phosphorescent emergency guide line | ≥7mcd/m²(60min) | ≤5m | Low-position wall/ground |
Implementation points and special scenario processing
Stairwell setting specifications
Standard Clause 5.4.1 clearly requires: All steps must be provided with continuous phosphorescent strips with a width of ≥20mm at the leading edge, and auxiliary guide lines with an intermittent width of ≤100mm should be provided at the handrails.
Smog environment response plan
When visibility is limited, the low-positioned phosphorescent evacuation route signs should meet the following requirements: 150mm height, 30mcd/m² initial brightness, and ensure that they can be identified within a radius of 3 meters (see Appendix C for details).
Maintenance and inspection requirements
- Electric light source system: Check the emergency power supply switching function every month (refer to GB/T 16895.33)
- Phosphorescent elements: Visually inspect against standard samples every quarter
- Brightness attenuation should be tested annually with professional equipment
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