and expansion-separation joints (2) ...... 60 Total ................................... 1,090 Miscellaneous internal structures 7.2-m-diam structural rings (2) .................... 200 Structural-wall openings and nonpressure doors (15) ...... 180 Pressure hatches (6) ................... ......... 72 Airlocks (5) .................................. Z00 E s cape vehicle attachment- separation adaptor ( 1 ) ......... 75 Tie-together and load-transfer structure .............. 560 Total ................................... 1,090 Miscellaneous internal structures 7.2-m-diam structural rings (2) .................... 200 Structural-wall openings and nonpressure doors (15) ...... 180 Pressure hatches (6) ................... ......... 72 Airlocks (5) .................................. Z00 E s cape vehicle
Cardozo