Steel girders of bridges and viaducts in the form of simple beams.

摘要

The present invention is a simple beam type steel girder that is installed on the piers, the cross section of the girder is positioned from the center of the span so as to have an economical cross-sectional shape while resisting the design shear force and the bending moment, which are the criteria for determining the girder section. It is characterized by having a cross-sectional structure in which the height becomes gradually smaller toward the parabolic or diagonal lines.