The
Experimental Assembly of Structures in EVA and the
Assembly Concept for Construction of Erectable Space Structures, or
EASE/ACCESS, were a pair of
space shuttle flight experiments that were performed on
STS-61-B, on November 29 and December 1, 1985. The purpose of the experiments was to study how quickly
astronauts would become proficient at assembling space structures during
extravehicular activity, and how quickly they would become fatigued, and to explore various construction and maintenance techniques. In particular, researchers studied the applied
moments of inertia arising in the manual assembly of a large space structure.