Stiffening element for a lattice girder

Details Stiffening element for a lattice girder Stiffening element for a lattice girder

1989-12-12

1991-10-08

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405150, 52650, 52694, F04C 304

Patent

active

050549642

ABSTRACT:
Stiffening elements are welded between the three rods (T1, T2, T3) of three-rod girders in uderground drift construction. Such stiffening elements consist of thee triangular wire polygons (10, 20, 30) connected to form one piece. Two of the polygons meet at the top rod (T3) to form a wire pyramid. The third wire polygon (30) is perpendicular to the plane determined by the axes of the lower rods (T1, T2). Since neither this third wire polygon (30) nor the adjacent polygon (10), which is one side of the pyramid, needs a cross-strut between the lower rods (T1, T2), a significant saving in materials combined with high resistance to bending is achieved.

REFERENCES:
patent: 3036676 (1962-05-01), Potzsch
patent: 3381479 (1968-05-01), Curzio
patent: 3930349 (1976-01-01), Wellerhaus

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