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ISO 7010 safety signs and the fire and isolation marks that sit alongside them. What holds the group together is that ISO 3864 fixes shape and colour to meaning before any pictogram is drawn — a green square is a safe condition, a red circle with a bar a prohibition, a blue circle a mandatory action, a yellow triangle a warning — so a reader who knows five shapes can read the category of any sign in the family without recognising its picture. Several members exist to state what the pictogram cannot: that a laser triangle carries no class information, that a harness sign presupposes an anchor point, that a lockout tag may be removed only by the person who applied it.
A white handset and arrow on a green square.
A figure under a showerhead on a green square.
A face with two streams directed at the eyes, on green.
A crossed-out flame in a red circle.
A blue circle with a white figure wearing goggles.
A blue circle with a white figure wearing ear defenders.
A blue circle with a figure in a fall-arrest harness.
A blue circle with a figure in a marked vest.
A yellow triangle with a black starburst beam.
A yellow triangle with a horseshoe magnet and field lines.
A yellow triangle with a suspended load above a figure.
A yellow triangle with a hand caught in rollers.
A yellow triangle with a gas cylinder outline.
A letter F marking cooking oil and fat fires.
A letter D marking combustible metal fires.
A triangle labelled heat, fuel and oxygen.
A tag attached to an isolated energy source, naming who applied it.
A red mushroom head on a yellow background.
A yellow triangle or notice warning of restricted entry.
A black and white panel with a lower-case a device.