Bastion was contracted to analyze the structural integrity of crane pedestals and immediate supporting structures on the port side of a jack up vessel. This crane is a pedestal mounted rotating crane and can be classified as a Type C. Bastion generated the report for both the strength and buckling assessments for this pedestal, and its immediate supporting structure. The analysis will verify that the design of the crane pedestal is in compliance with three codes, namely: ABS-152, ABS-126, AISC and API 2C

Bastion generated an FEA math model for both the crane pedestal cylindrical thick-wall column and three supporting deck
panels with plate elements in MSC/NASTRAN format. The stress results of the FEA model are calculated with MSC/NASTRAN solver. Additionally, a hand calculation and verification was also provided to prove the subject structure has adequate buckling resistance strength according to the above three codes. Our report showed the designs are of adequate structural strength in terms of the strength and buckling resistance when both the dead weight load and maximum operational loads are simultaneously applied at the top of the crane pedestal.