Metal enclosure for electrical switchgear

A gas insulated switchgear comprising:

• a set of electrical switches;
• and
• a metal enclosure configured to be pressurized above atmospheric pressure, the metal enclosure having:
• metal walls sealing a volume for accommodating the gas insulated switchgear, the metal walls including a first metal wall arranged opposite a second metal wall, wherein at least the second metal wall is a corrugated metal plate with corrugations that extend along a first axis,
• a set of elongated metal elements attached to the first metal wall and to the second metal wall, the set of elongated metal elements are arranged through holes in the first metal wall and in the second metal wall and reach outside the metal enclosure, and
• a set of elongated metal stiffeners attached to a rear side of the second metal wall outside the metal enclosure, each elongated metal stiffener of the set of elongated metal stiffeners is attached to at least two of the corrugations of the second metal wall, wherein each elongated metal stiffener is attached to at least one elongated metal element of the set of elongated metal elements pressurized by a gas.