How heavy are metal prints?

Here is a list of weights – these weights include an 1.25″ frame to edge.

16″ x 20″ – 3lbs.
24″ x 36″ – 6lbs.
30″ x 45″ – 8lbs.
36″ x 72″ – 14lbs.
48″ x 96″ – 23lbs.