The invention relates to a storage installation for a liquefied gas comprising a supporting structure and a sealed and thermally insulating tank arranged in the supporting structure, the tank comprising at least a first tank wall (1) and a second tank wall (101). ), each tank wall (1, 101) comprising at least one sealing membrane (4, 104) and at least one thermally insulating barrier (2, 102), the first supporting wall (3) forming an angle with the second load-bearing wall (103) along an edge (100), in which the thermally insulating barrier (2) of the first vessel wall (1) comprises an insulating fixing beam (11), the insulating fixing beam (11) ) comprising a lower face (12) located against the first supporting wall (3) and a metal covering element held at a distance from the lower face (12) by a plurality of shear webs (14), and in which the supporting structure comprises a first stop device e (19), the first stop device (19) being placed along an edge of the insulating fixing beam (11) opposite to the edge (100) and being configured to form a stop limiting the movement of the fixing insulating beam (11) in the longitudinal direction away from the ridge. Figure for the abstract: Fig. 1
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