Sorry I don't have a picture to post...
I work at a private small university which dates back to 1849. During some excavation work at the base of the foundation of our main Admin building (ca.1889) recently, a piece of flat iron about 1.5 inches wide, 3/8 inch thick and 16 inches long total was found in the dirt, buried several feet deep. What makes it unusual is that the last 4 inches from one end, was cut down the center and the resulting 2 legs bent in opposite directions 90 degrees to the main bar body -- you can almost stand the bar up on these projections. Like an upside down 'T'
At the other end of the bar, about 1.5 inch down from the end is a 5/8 inch drilled hole.
My first thought was that it was some type of old style window weight as the windows there are the double-hung sectional with each section being about 3 ft by 5 ft. But I couldn't understand what the need were for the 4 inch legs splayed out.
My archaelogist/geologist friend thinks it might have been used during the construction -- such as lifting pallet loads to the higher floors.
If anyone knows or has any ideas, glad to hear from you.