4201 - Danger men at work
4202 - Danger men working overhead
4203 - Danger men working below
4204 - Danger deep excavations
4205 - Danger stop/look/listen beware of trucks
4206 - Danger stop/look/listen beware vehicles
4207 - Danger deep water
4208 - Danger hot
4209 - Caution Mind the step
4210 - Caution - out of order
4211 - Warning Battery charging in progress
4212 - Caution arc welding
4213 - Caution slippery floor surface
