Three belt grid carrier removal frame for the tunnel construction and reinforcing element

摘要

Grid carrier removal frame or stiffening means for grid carrier removal frame whose three parallel chord bars (1, 2) by means of form a triangle and are (3) and transverse struts (4) are spatially connected to each other by welding, wherein the girders along each side may have (3) and transverse struts (4), the chord bars cross each other as possible, in order to make it possible to load bearing spot welds (5, 7, 8, 10, 11, 12).