Symbol 1557 from ISO 7000 - Title/Meaning: Load tipping Function/description: To identify the control that raises or lowers the front of the truck bed to a specific angle.
Application referenced in: ISO 2575
Additional information: 
On road vehicles: red telltale indicates a hazard warning.
Own work using: iso.org/obp/graphics/grs/b984c577-afd4-4c47-96bc-7f78494779aa 200.png
Vectorization:  Mrmw