Tyre for a heavy vehicle of the civil engineering type, comprising: - a tread, a crown reinforcement radially on the inside of the tread, and a carcass reinforcement radially on the inside of the crown reinforcement, - the crown reinforcement comprising, radially from the outside towards the inside, - a protective reinforcement comprising a first protective layer and a second protective layer, the first and second protective layers (51, 52) comprising elastic metal reinforcers, characterized by a structural elongation A s at least equal to 1%, a total elongation at break A t at least equal to 4% and a tensile elastic modulus at most equal to 150 GPa, which are parallel to one another within each layer and crossed from one layer to the next, forming respective angles A 1 and A 2 with the circumferential direction (YY'), - a working reinforcement comprising a first working layer and a second working layer, radially on the outside of and adjacent to the first working layer, the first and second working layers (61, 62) comprising inelastic metal reinforcers characterized by a relative elongation, under a tensile force equal to 10% of the breaking force F m, at most equal to 0.02% and a tensile elastic modulus between 150 GPa and 200 GPa, parallel to one another within each layer and crossed from one layer to the next, forming respective angles B 1 and B 2 with the circumferential direction (YY'), wherein the angle B 1, formed with the circumferential direction (YY') by the metal reinforcers of the first working layer, is at least equal to 50° and strictly less than 90° characterized in that said second protective layer is radially on the outside of and adjacent to the first protective layer and in that the angle B 2, formed with the circumferential direction (YY') by the metal reinforcers of the second working layer is non-zero and at most equal to 12°. - a tread, a crown reinforcement radially on the inside of the tread, and a carcass reinforcement radially on the inside of the crown reinforcement, - the crown reinforcement comprising, radially from the outside towards the inside, - a protective reinforcement comprising a first protective layer and a second protective layer, the first and second protective layers (51, 52) comprising elastic metal reinforcers, characterized by a structural elongation A s at least equal to 1%, a total elongation at break A t at least equal to 4% and a tensile elastic modulus at most equal to 150 GPa, which are parallel to one another within each layer and crossed from one layer to the next, forming respective angles A 1 and A 2 with the circumferential direction (YY'), - a working reinforcement comprising a first working layer and a second working layer, radially on the outside of and adjacent to the first working layer, the first and second working layers (61, 62) comprising inelastic metal reinforcers characterized by a relative elongation, under a tensile force equal to 10% of the breaking force F m, at most equal to 0.02% and a tensile elastic modulus between 150 GPa and 200 GPa, parallel to one another within each layer and crossed from one layer to the next, forming respective angles B 1 and B 2 with the circumferential direction (YY'),