beam is the primary structural element and girder implies the secondary structural element? is it always the case that in a plenum depth situation the girder is in-line with the beam so you would not include the girder depth in a calculation for plenum depth? are there other assumptions in structural like this? does this apply whether it is steel or concrete or are there signals where you would do one or the other? or always exclude the girder depth?
Please sign in to leave a comment.