Bolted cross beam of multi-box-girder steel bridge

The utility model relates to a bolting cross beam of a multi-box-girder steel bridge. The bolting cross beam comprises a cross beam body, screws, nuts, bolting holes and reserved channels. Wherein thecross beam is of an I-shaped structure, screws are arranged on the two sides of an upper flange and a lower flange of the I-shaped cross beam structure, the screws are welded to the upper flange andthe lower flange of the cross beam through groove plug welding, the tail ends of the screws are fixed through nuts, reserved notches are formed between the two sides of the top of a web of the cross beam and the upper flange of the cross beam, and bolting holes are formed; x-shaped openings are symmetrically formed in the web plate of the cross beam. The structure has the advantages that the construction cost is low; the on-site welding amount is reduced; the mounting time is shortened; the construction cost is reduced; the construction efficiency is high; bolting joints are less affected by weather, so that the constr