Patent ID: 6880308

Claim:
A lattice girder supporting frame for tunnel lining comprising: an upper boom member and two lower boom members arranged in parallel relative to each other and forming a triangle; truss braces spatially connecting said upper boom member and said lower boom members to each other, wherein each of said truss braces has a general V-shape comprising two straight brace parts each having a first and second end, said two straight brace parts connected to each other at the first end via a straight bridge piece, wherein said truss braces are arranged in a symmetrical plane extending laterally from said upper boom member to an axis of each of said lower boom members; cross ties extending at right angles relative to said lower boom members, for connecting said lower boom members to each other, wherein the second end of each of said two straight brace parts, which are not connected by said straight bridge piece, terminate at said lower boom members, said second ends terminating without a bend and being welded to said lower boom members.