Think everything through the end of the game and don't trust parents or faculty to guide set construction. Have someone competent review everything.
Had the misfortune of working a show as an LD last year where the parents wheeled this large 12' tall bed on-stage for Once Upon A Mattress, assembled by a combination of parents and a faculty member who "does this". I shut down rehearsal and walked director through my laundry list of concerns and the students expressed their concerns too. Rehearsal continued. Girl almost fell off the ladder going up. No guards on top.
Caster boards were toe-nailed in from side of framing rather than supporting the load of the framing on top of the
caster boards. One of the
caster boards split out of the framing and the corner dropped 4" sending the whole rig cattywampus and almost bouncing the actress off the top onto the
stage where she would've rolled into the
orchestra pit.
Same show. They wanted to
play with levels for their set. Took a bunch of 4x8
platform risers with 24" legs and stacked them on top of each other rather than getting the right legs. No cross bracing, no stops in place to prevent one of top 2 layers of stacked risers from dancing off the bottom row.
Take nothing for granted and never trust "this is how we've always done it". Consider all implications on outset of production design. Once you'r.e a week out from opening night everyone
wants to push forward whatever the circumstances. Momentum gets the better of people and no one wants to be the squeaky wheel. Much easier to handle these issues before time/effort/emotions have been devoted into something.