![Star Trek mistake picture](/images/screenshots/315000-315999/315950_sm.jpg)
Continuity mistake: After Spock and Kirk attempt to trap Charlie into a room with a force field, Charlie makes the wall disappear and then freezes Kirk and Spock in place. Spock has his right hand against the wall at about chest level with himself. The camera cuts to a closer angle and suddenly his hand is higher up, about face level. (00:39:47)
Answer: It's never really specified, but the poles were most likely a way of going from deck to deck for engineering crew.