Weird Symbol Saved from NYC Building

Now this is a pretty odd symbol that they found on a NYC warehouse built 175 years ago:

There are 7 bricks facing north south at the top and 14 bricks at the bottom. It kind of looks like a Freemason symbol to me. The triangle looks a little like that triangle with the eye in it that you see in some of their iconography. And the bricks going north south kind of look like the plane and measuring device in this picture.