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About This Item


Full Description

Provides general criteria for the design, evaluation, and use of safety symbols to identify and warn against specific hazards, and to provide information to avoid personal injury.



1 Introduction

2 Scope and purpose
2.1 Scope
2.2 Purpose

3 Application
3.1 Intent
3.2 Existing American National Standards

4 Definitions

5 Safety symbol types and colors
5.1 General
5.2 Hazard alerting
5.3 Mandatory action
5.4 Prohibition
5.5 Information

6 Graphic design considerations
6.1 Procedure for the design of new safety symbols
6.2 Specific design considerations
6.2.1 Proportion
6.2.2 Symmetry
6.2.3 Direction
6.2.4 Form
6.2.5 Detail
6.3 General Considerations
6.3.1 Safety symbol size
6.3.2 Safety symbol placement
6.3.3 Safety symbol environment

7 Safety Symbol selection criteria
7.1 Demonstrated understandability
7.2 Without demonstrated understandability
7.2.1 Safety symbol training/recognition procedure

8 References
8.1 General
8.2 American National Standards


A Principles and Guidelines for Graphical Design of Safety Symbols

B General Procedures for Evaluating Candidate Safety Symbols

C Safety Symbol Examples

D Informative References

Document History

  1. ANSI Z535.3-2011 (R2017)

    Criteria for Safety Symbols

    • Most Recent
  2. ANSI Z535.3-2007


    Criteria for Safety Symbols

    • Historical Version
  3. ANSI Z535.3-2002

    Criteria for Safety Symbols

    • Historical Version