If some poems were bridges, let us assume suspension, just as an example, the safety factor of 9 (which is the code for such) would need to be increased.
By increasing the safety factor, the bridge would need to be made stronger and heavier, thus defeating the factor as the supports would be under too much pressure due to length.
Since the collapse of the Bridge in Genoa, I am conscious of these structures even as I pass under them. Poems can be just as daunting, especially long winded ones which I never read and I never write due to attention span.