Project Overview
Dry Creek consists of a 7-story office tower and an adjacent 5-level parking garage. First floor of the office building is for executive parking. Extending outside, the garage then has four elevated levels. The building features horizontal ribbons of precast spandrels and glazing that run across the front of the building. A glassed inset ascends the full height of the building and defines the center entrance.
Construction consists of precast stair and elevator cores and precast load-bearing spandrels, double tees and inverted tees. The office design was completed with perimeter spandrels with beam and column lines on the inside. Light weight double tees were used to improve economy in shipping. A mechanical yard uses precast, partition-style walls, some retain soil. Roof construction includes sloped double tees with topping.
The structure is built into a hillside. Soil retention is by a rock anchor and Gunite wall. The garage utilizes precast light walls and shear walls and the precast facing the soil retention system consists of grey precast concrete wall panels. Double tees in the garage are field topped.
Construction had to overcome numerous challenges and late changes.
Precast Solution
Dry Creek was converted from steel to total precast thanks to competitive pricing and an accelerated construction solution. The result was a reduction of 4 months off the delivery time and a savings of approximately $1,000,000.
About half way through design Arrow Technologies came on board as a tenant. A level was added to the office building and the parking garage was expanded from one elevated deck to four. This dramatically changed the precast erection plan. With the garage expansion, use of a planned second crane was not feasible and one crane had to do the work of two cranes in the same allotted time.
Originally red with a buff colored bull nose feature and an acid-etched finish, Arrow had the red concrete was stained to a darker tan. They also required that the structure accommodate a data center and a false floor with data cables beneath. The design team had to figure out how to provide four inches of void space under and accommodate the loads of additional generators and cooling equipment.
Despite changes and weather delays, the project was less than two weeks late.
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