Patent ID: 7062811
Filing Date: 2006-06-20
Classification: E01D

Abstract:
1. Collapsible bridge, having two track girders which are constructed as truss girders with a triangular cross-section, wherein a chord profile is provided at each triangulation point, and wherein two corners of the triangular cross-section are situated at the same level, and the third corner is situated above the latter, wherein, in each case, between one of the lower triangulation points and the upper triangulation point, a truss plane is formed comprising diagonal struts, the lower chord and the upper chord, wherein lower and upper truss nodes respectively are formed at the points of the connection of two diagonal struts and a lower chord and an upper chord respectively, wherein the two track girders are force-lockingly connected by transverse girders, wherein roadway planks are provided which are aligned in the longitudinal direction of the bridge and are force-lockingly connected with the transverse girders, wherein the transverse girders are fitted completely through the track girders and are force-lockingly connected with the latter, so that the transverse girders fix the distance between the two truss planes on the bottom side of a track girder as well as the two track girders with respect to one another, wherein the transverse girders rest on the lower nodes of the two truss planes of a track girder and are force-lockingly connected with the latter, and wherein the two truss planes of a track girder are connected at the upper triangulation point of the track girder cross-section by means of a hinge, so that, when the bridge is taken down, the track girders can be folded together.