Christopher Weeks wrote:I wonder what they're doing with all those windows...
Commercial projects across the US typically consists of 2 sets of documents. The construction drawings and the project manual. Both of these are subject to modifications as the projects bids and gets underway. These modifications are called addendums. For a reference, a typical new construction school will have 300 ish pages of drawings and 600 ish pages of project manual.
The construction drawings consist of all the plans including site work, demo, structural, architectural, mechanical, electrical, etc. The project manual is broken into sections. One section is the "Demo section".
In the demo section, it'll specify if the demolished material becomes property of the demo contractor. If it does become the contractor's property, materials may be salvaged and resold or reused. If the material remains the owners property, you break the contract if anything is salvaged. Breaking a contact can result in a business ending lawsuit.
I would bet that the government retained ownership of the demolished materials and they must be disposed of in a manner that would not make them salvageable.
Also, there are not many contractors willing to go to the trouble of salvaging materials for resale due to the labor cost and logistics of reselling on these large commercial projects. Typically, the lowest bidder is selected.