Bi-oblique tip tank for LNG

The invention relates to a ship including a load-bearing structure and a sealed and thermally insulated tip tank (53) for containing liquefied natural gas, said tip tank having a plurality of tank walls (54, 55, 56, 57, 58, 59, 60, 61, 62, 63) attached to said load-bearing structure, each tank wall having, in series in the direction of the thickness from the inside toward the outside of said tip tank, a primary sealed barrier, a primary thermally insulated barrier, a secondary sealed barrier and a secondary thermally insulated barrier, a first wall (56) and a second wall (63) from among said walls of the tank being adjacent to an edge (65), the primary sealed barrier of said first wall including at least one first strake (67) connected, at said edge, to said load-bearing structure via a post, characterized in that the primary sealed barrier of said second wall includes at least one second strake (64) connected, at said crest, to said load-bearing structure via said post.