Crane with a telescopic boom

The crane has a boom (20) that tilts backwards between upright and lowered positions, and inversely. A telescopic mast (50) tilts between a folded position against the boom and a deployed position. The boom and mast is folded flat against each other and the boom is lowered by rotation to permit the mast to be folded flat on the boom and to be brought back above a base (8), in a storage position.