Conclusions Thispaperreviewed thedesign andverification ofaSpaceStation trussattachment system thatwas successfully usedforthefirsttimetomatetheISSZ1andP6segments, inDecember 2000. The mechanisms weredesigned andusedinamanner that,asmuchaspossible, kepttheberthing, interface alignment, andbolt-down phases separate. Contingency procedures weredeveloped fortheEVA astronauts touseinresponse toon-orbit anomalies. Arobust system wasdeveloped which accommodated interface misalignment caused bymanufacturing tolerances andthermal gradients. The verification approach resulted fromabalance between testsandanalyses atthecomponent andsystem levels. References 1."Z1toP6Berthing UsingPayload Retention Devices", Gabriel Katell, TheBoeing Company, Rocketdyne Propulsion &Power,April16,1999,EID-03968. 2."Evaluation ofZ1Capture LatchtoP6Capture BarPreload", Gabriel Katell,TheBoeing Company, Rocketdyne Propulsion &Power,November 22,1999,EID-05257. 3."Rocketdyne TrussAttachment System (RTAS) Design/Verification Technical Interchange Meeting", Gabriel Katell,TheBoeingCompany, Rocketdyne Propulsion &Power,April29,1999,EID-03899. 4."Z1-Stack Flight4AIDR3Z1/P6andP6LS/P61EA Interface Loads", Robert Rudd,TheBoeing Company, February 16,1998,A92-J195-STD-M-RAR-9800016. 5."Rocketdyne TrussAttachment System (RTAS) BoltDevelopment Torque-Preload Test",George Raquelsantos, TheBoeing Company, Rocketdyne Propulsion &Power, May17,1999,ETD-MD4C01178. 6."RTAS Mechanism- Z1Side(P6toZ1)StressReport", BillNg,TheBoeing Company, Rocketdyne Propulsion &Power, June23,1999,EPS-S-PV-16-01-017. 7."Rocketdyne TrussAttachment System (RTAS) DesignTolerance Analysis", Gabriel Katell&Stanley Gordon, TheBoeing Company, Rocketdyne Propulsion &Power, July12,2000,EID-03256. 8."Rocketdyne TrussAttachment System (RTAS) Verification Plan",Gabriel Katell, TheBoeing Company, Rocketdyne Propulsion &Power, March26,1998,EID-02267. 9."Rocketdyne TrussAttachment System FineAlignment Bolt/Nut Qualification Vibration TestReport", FrankChang&KeliAsato,TheBoeingCompany, Rocketdyne Propulsion &Power, March12,1999, ETD-PQ4-C01180. 10."Rocketdyne TrussAttachment System FineAlignment Bolt/Nut Qualification Thermal CycleTest Report", Gabriel Katell&KeliAsato,TheBoeing Company, Rocketdyne Propulsion &Power, March 31,1999,ETD-PQ4-C01181. 11."HTV#7TestResults- BMRRM DualLatch,RTASBolts,Z1Keel,Russian Tools", JohnMaddux, The BoeingCompany, Rocketdyne Propulsion &Power, October 15,1999,EID-00722-103. 12."Rocketdyne TrussAttachment System FineAlignment Bolt/Nut Misalignment Qualification Test Report", Gabriel Katell&KeliAsato,TheBoeing Company, Rocketdyne Propulsion &Power, April8, 1999,ETD-PQ4-C01189. 13."Rocketdyne TrussAttachment System FineAlignment Bolt/Nut Qualification StaticTestandZ1 Contingency Spacer LockToolStrength TestReport", Gabriel Katell&AlfredLewis,TheBoeing Company, Rocketdyne Propulsion &Power,May13,1999,ETD-PQ4-C01191. 14."Rocketdyne TrussAttachment System FineAlignment Hardware Contact Dynamics Test/Analysis Correlation Report", Gabriel Katell,TheBoeing Company, Rocketdyne Propulsion &Power, April20, 1999,EID-03970. 15."Rocketdyne TrussAttachment System FullSimulation Report", TeriKrene,TheBoeing Company, Rocketdyne Propulsion &Power,August 2,1999,EID-03954. 16."CrewConsensus TestReport", CathyTherrien, TheBoeing Company, Rocketdyne Propulsion & Power,June22,1998,EID-00722-51. 17."P6RTASRaceConcentricity Assessment", Gabriel Katell, TheBoeing Company, Rocketdyne Propulsion &Power,October 10,2000,EID-05780. 207