This free "Structural engineering of Metal bridge structure 3D model get" 3D asset is currently listed under the authorship of "Unknown author".
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STL (Stereolithography, filesize: 215 MB), OBJ (OBJ, filesize: 145 MB), DXF (DXF, filesize: 215 MB), FBX (Autodesk FBX, filesize: 69.9 MB), USDZ (USDZ, filesize: 69.9 MB), 3DS (3D Studio, filesize: 69.9 MB), JPG (JPG, filesize: 145 MB), DAE (Collada, filesize: 145 MB), DWG (AutoCAD, filesize: 145 MB), SKP (Sketchup, filesize: 145 MB), HRC (Autodesk Softimage, filesize: 145 MB), MAX (Autodesk 3ds Max, filesize: 145 MB), LS11 (Lumion, filesize: 145 MB)