Gas turbine engine support structure

A gas turbine engine casing comprising a wall member, a support structure for supporting a load from said wall member, said support structure comprising a first sub-structure positioned on one side of said wall member and a second sub-structure positioned on the opposite side of said wall member to said first sub-structure, said first and second sub-structures being aligned with each other at least one fastener maintaining said first and second sub-structures in engagement with said wall member, said at least one fastener interconnecting said first and second sub-structures through a corresponding at least one aperture in said wall member, the first of said sub-structures being provided with means for the attachment thereto of said load to be supported from said wall member, and cellular material attached to said wall member on the side thereof to which said second of said sub-structures is attached, a second wall member being attached to said cellular material so that said cellular material is interposed between and substantially enclosed by said wall members.