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 ................................... 1,426 Exterior surfaces 7. Z-m OD straight section ........................ 810 Domes (less center area) (2) ....................... 1,530 Spine stub _Z. 2-m high ........................... 382 0. 8-m ID passageways (Z) ........................ 288 Passageway ends
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