David Hammons’s Gansevoort installation is expected to feature a ghostlike image of the original Pier 52 building on that site, according to those who have been briefed on the project — an open minimalist framework of what had originally been there, like a pencil line drawing in space. The project would rest on 12 pilings — five of them on the peninsula, with a sixth out at the end of it and another six in the water to the south.