Construction beam

I think it could be either:

Which length description are you looking for?:

girder

(Other definitions for girder that I've seen before include "Structural metal beam" , "Large metal beam used in building" , "Constructional beam" , "Supporter" , "Horizontal supporting beam" .)

I've seen this clue in The Mirror.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.