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A warning sign is a type of sign which indicates a potential hazard, obstacle, or condition requiring special attention.
The 2007 revisions to ANSI Z353.4 allowed for the 'safety alert symbol' found on 'Danger', Warning' and 'Caution' headers to be replaced with the ISO 7010 "W001 - General warning" symbol to enable compliance with ISO 3864-1 for signs used in international situations or equipment being exported abroad.
Generic warning symbol (Background color varies) On roadside warning signs, an exclamation mark is often used to draw attention to a generic warning of danger, hazards, and the unexpected. In Europe and elsewhere in the world (except North America and Australia), this type of sign is used if there are no more-specific signs to denote a ...
ISO 7010 is an International Organization for Standardization technical standard for graphical hazard symbols on hazard and safety signs, including those indicating emergency exits. It uses colours and principles set out in ISO 3864 for these symbols, and is intended to provide "safety information that relies as little as possible on the use of ...
a signal word – either Danger or Warning – where necessary hazard statements , indicating the nature and degree of the risks posed by the product precautionary statements , indicating how the product should be handled to minimize risks to the user (as well as to other people and the general environment)
ANSI Z535.1 also explicitly uses multiple levels of hazard, including Yellow (Pantone 109) for 'caution' messages, and Orange (Pantone 151) for stronger 'warning' messages. [ 7 ] [ 8 ] [ 9 ] Like ISO 3864, ANSI Z535 includes multiple sections: ANSI Z535.6-2006 defines an optional accompanying text in one or more languages.
The dangerous bend or caution symbol ☡ (U+2621 ☡ CAUTION SIGN) was created by the Nicolas Bourbaki group of mathematicians and appears in the margins of mathematics books written by the group. It resembles a road sign that indicates a "dangerous bend" in the road ahead, and is used to mark passages tricky on a first reading or with an ...
Miscellaneous Symbols is a Unicode block (U+2600–U+26FF) containing glyphs representing concepts from a variety of categories: astrological, astronomical, chess, dice, musical notation, political symbols, recycling, religious symbols, trigrams, warning signs, and weather, among others.