Would you polyurethane a ceiling beam after staining?

If so, with what and how?

Very beginner here! I've done a few small projects before where I've sanded, stained, and sealed with a polyurethane - but always on ground level. The nature of this 14ft wood "beam" project and my available tools resulted in me having to hang the large portions of wood prior to having a fully stained and finished project (hence the seams, which will be covered with beam straps when finished). I applied an oil based stain, and now am wondering if it's truly necessary to seal it, considering it will be an untouched aspect of the house on the ceiling... Granted it is in the to-be kitchen.

Remembering the care (read struggle) that went into evenly applying a thick goopy polyurethane in the past, I was wondering if I could just avoid the headache all together? If I need a sealing product, is there one more recommended for the "above the head" type work?

If so, with what and how?

Very beginner here! I've done a few small projects before where I've sanded, stained, and sealed with a polyurethane - but always on ground level. The nature of this 14ft wood "beam" project and my available tools resulted in me having to hang the large portions of wood prior to having a fully stained and finished project (hence the seams, which will be covered with beam straps when finished). I applied an oil based stain, and now am wondering if it's truly necessary to seal it, considering it will be an untouched aspect of the house on the ceiling... Granted it is in the to-be kitchen.

Remembering the care (read struggle) that went into evenly applying a thick goopy polyurethane in the past, I was wondering if I could just avoid the headache all together? If I need a sealing product, is there one more recommended for the "above the head" type work?