Some notes on the PHS floors under construction in Building 90.
The PHS floors are being completed in this sequence: 5th floor first, 4th floor second, and 3rd floor last. That’s why in these videos you’ll see the 5th floor mostly walled in, the 4th floor partially complete, and much less in place on the 3rd floor.
The atrium and the large exterior windows contribute to the National Park Service’s interest in maintaining an open feel and conveying natural light into the building. Transom windows set above the doors into window offices also help bring light into interior halls.
From exterior walls to 25 feet into the building, contract plans have generally required that the “ceiling” be the deck of the floor above, with all ducts, pipes, and so forth exposed. This is in keeping with the designers’ intent to maintain the historically industrial feel of the building and to feature the exterior windows. Offices and spaces farther into the building have ceilings of conventional height.
The posts or pillars seen spaced across floors, part of the original building, gave reinforcement to support heavy equipment. The posts are an integral part of the structure and also suggest the building’s working past, in keeping with the industrial aspects retained in the adjacent Biotech Place, to which PHS will have access via a 5th-floor walkway.