Abstract
Since international standard ISO2394 " General principles on reliability for structures " has been established, design guidelines, codes and standards based on limit state method are being enacted in many countries in the world. This paper explains the fundamental concept of limit state design method first. Then, one view in the case of applying it to construction machinery etc. is described. Some calculation and investigation cases on the design method for materials handling carrying systems besides mobile crane which is a typical construction machinery are shown. When applying this method to a machine or its system, unlike the case where it applies to an architectural structure etc., it is important to make clear the dynamic limit state based on dynamic analyses. Finally, related outlook in the near future is discussed.
