The client has a reclaimer that has been operating for over ten years at its facility in South America. This equipment experienced chronic fatigue cracking in the truss beam upper chord. After making in-house crack repairs and performing a modification that resulted in further fatigue cracking, the client retained Liftech to evaluate the cracking and to design repairs.
Liftech performed analyses that determined the cause of cracking and developed a simple repair detail that improves fatigue performance by a factor of 20 to 400 depending on the loading condition. Liftech provided a report summarizing our review, the cause of cracking, and our recommendations, repair design drawings, and procedure.