Z321 EXPLAINED

Index Symbol Signs Prohibition Mandatory Danger Caution Emergency Miscellaneous SymbolText Dangerous Goods Safety Signs Danger Caution Notice Parking Smoking Exit Safety First Tags and Ties Traffic Signs Prescription Danger Construction Hardware Miscellaneous Sign Blanks Products Materials Sizes Links Contact Information Français

The Canadian Standards Association Technical committee on Signs and Symbols for the Occupational Environment has drafted CSA Standard Z 321 in order to warn, inform, and communicate messages in this environment. The system consists of three classifications each divided into two subtitles in combination with six colours and three shapes. Size relationship of the shapes was determined with consideration for visibility, legibility and glyph content. Regulatory Symbols Prohibition An order forbidding an action Black symbol with white background and red cancellation Mandatory An order for obligatory action White symbol on black background Warning Symbols Caution Potential hazard Black symbol on yellow background Danger Definite hazard White symbol on red background Information Symbols Emergency First aid, health, fire protection, firefighting, emergency equipment White symbol green background Miscellaneous White symbol on blue background