This publication provides introductory technical guidance for civil engineers, bridge engineers and construction managers interested in maintenance and repair of steel bridges. Here is what is discussed: 1. INTRODUCTION, 2. STRUCTURAL STEEL, 3. GENERAL REPAIR, 4. CONNECTIONS, 5. REPAIR OF STRUCTURAL MEMBERS, 6. TENSION MEMBERS, 7. COMPRESSION MEMBERS/COLUMNS, 8. BEAMS, 9. CREATION OF A COMPOSITE ACTION, 10. POSTTENSIONING, 11. TRUSS SYSTEMS,