The design of the MOOG repair units series MBS has been developed to perform long-term projects. The small space required on bridges makes work possible without impeding the rail traffic. The statical design is characterized by low self weight and a very high loading capacity. MOOG repair systems can also be used on rail bridges even with very tight sidewalks. The space required for the chassis can be as small as 0,5 m - 1 m. Equipped with optional devices like additional platforms or pier inspection platforms almost all requirements are easily fulfilled.