When you look at deck plans of starships they don't appear that they would be very sound, structurally. The decks appear to be very thin, as do the walls. If, for example, one built a full-size 1:1 1701 model for an ultimate Trek museum, it seems to me that you would need multiple supports to keep the thing from falling apart. Even if you built it from the best materials, the neck would not support the primary hull, and the nacelles struts would bend and buckle. Granted starships are live in space and have magic force fields holding everything together, but it seems that when a ship encountered a catastrophic loss of power the torsional stress from any significant change velocity (rotating or moving in a random direction) would tear the thing apart.