The invention relates to a liquefied gas storage facility (1) comprising: a load-bearing structure (10) having a bottom wall (11) and a vertical load-bearing wall (12) made up of N vertical load-bearing panels (14); and a tank comprising a bottom wall (21) and a vertical wall (22), said bottom wall (21) comprising a plurality of angular sectors, the corrugated sealing membrane (70, 170) of each angular sector (25) having first corrugations (72), the corrugated sealing membrane (70, 170) of each angular sector (25) comprising a plurality of metal plates (71) arranged to form ring portions (75), the ring portions (75) consisting of a set of complete metal plates, wherein the total number of first corrugations (72) that are present on the ring portions (75) increases in the direction of the vertical wall (22), said total number being increased only every M successive ring portions (75) where M is a natural integer greater than or equal to 2.