This is quite similar to the beam railraod bridge within several feet next to sandstone's deck pratt truss bridge. There isn't a girder on it, however it has a fascinating history!!! It was made with only rail on the deck to allow large loads of mined sandstone slabs to be hauled and is still used today though the trains crawl across it verrry sloowwly!! This is how sandstone,mn got it's name and beautiful qaurry and river scenery! Watch for pics!!!