  Design audit or design verification is an important step in engineering of
heavy mobile materials handling equipment. Usually, the costumers employ third
parties for audition of contractors engineering. Here a part of design audit of
a combined stacker-reclaimer machine is reported. This equipment is designed
and constructed by a local supplier in Iran for the iron ore pelletizing plants
at GOHARZAMIN Iron Ore Company. The structure plays an important role in mobile
material handling machines such as Stackers and Reclaimers and its failure and
damage may cause considerable financial and human life losses. In this report
the undercarriage of stacker-reclaimer machine including gantry and traveling
system are numerically analyzed. The Finite Element Method is used for stress
prediction under the critical operating loads according to the design
standards. The critical areas of the undercarriage are identified and it is
observed that, the maximum stress is in the safe range.
