In mid-2020 design analysis was completed on the steel plate & pin assemblies (ITA6550) used to connect the ISAC target hall crane hook block to the module lifting yoke assembly ITA0494.  The released design note is Document-184431.  

In November 2020 fabrication was completed on two full plate & pin assemblies (photos attached below).  As per the relevant ASME standards (identified in the design note), each assembly has been identified with serial numbers (#1 and #2).  Material test reports for the steel plate and round bar material used for fabrication are attached in PDF format.  For both materials the tested tensile yield strength (from the MTR) exceeds the value used in design calculations (from Document-184431):  117ksi vs 100ksi for the plate material;  138si vs 103ksi for the round bar material.

On February 8, 2021 both plate and pin assemblies were load tested by David Wang and Frank Song.  The total load applied to each was 31,400 lbs (as per the ISAC target hall crane load cell) which exceeds the 125% of rated capacity (31,250 lbs) required for the test.  The lifts were conducted successfully and no deformations or other damage to the assemblies were observed.  Photos of the load test are also attached.

Both plate & pin assemblies are now certified for use up to their rated capacity.  As specified on drawing ITA6550 and in Document-184431, a monthly visual inspection must be performed to check for structural deformation, cracks, excessive wear, and loose or missing fasteners.  In addition, an annual inspection must be performed to check for structural deformation, cracks, excessive wear, loose or missing fasteners, and missing or illegible markings or safety labels.  A written record of the annual inspection must be documented and kept readily available.