Diagrams 3 Willamette River Swing Truss Railroad Bridge, Portland Oregon Tweet 1910 DRAW SPAN, BOTTOM CHORD, STRINGERS, AND LOADING BEAMS AT TOWER 1910 DRAW SPAN, DETAILS OF TOWER AND PORTALS DRAW SPAN GENERAL DETAILS, LATERALS AND PACKING DIAGRAM STRESS SHEET CENTER TOWER AND PORTALS TURNTABLE BEARINGS AND LOADING BEAMS