Hayden Ferry Lakeside will be the first luxury mid-rise condominium complex in Tempe, Arizona. Located on the Salt River with a gorgeous beach and breathtaking views, the project will ultimately encompass four or more mid-rise towers with underground parking.
The architecture will reflect traditional southwest ambiance, with cladding materials of native stone and precast concrete. The buildings will vary in height from eight to 14 stories and include six luxury units on a typical 90-by-125-foot floor plate. Upper penthouse floors will contain two to four larger units. Every unit will feature a spacious balcony.
Due to variability in the underlying soils along the Salt River, the building foundations will be supported on piles. Because of the difficult installation conditions expected, the structural engineer, Cary Kopczynski & Company, was challenged to create a design that would minimize the number of piles. This was accomplished through a lateral load carrying system that mobilizes the entire building frame for resisting wind and seismic forces. All slabs and columns will participate in resisting lateral loads, resulting in overturning forces to the foundation that fall within the pile allowable capacity for short term loading. No additional piles will therefore be required for lateral forces.
Cary Kopczynski, owner, Cary Kopczynski & Company, said the structural frame for each building’s superstructure will be constructed entirely of cast-in-place concrete. Seven-inch thick floor slabs with typical spans of 27 feet will be post-tensioned with half-inch diameter unbonded monostrands. Typical columns are 18-by-18-inches in the 8-story buildings, and 18-by-24-inches in the 14-story buildings.
Concrete strengths are 4,000 psi in the foundations, 5,000 psi in the post-tensioned slabs, and 6,000 psi for all columns. Set retarders and American Concrete Institute (ACI) hot weather concreting provisions will be used to support the proper curing of slab pours in Tempe’s ultra scorching weather.
As Kopczynski points out, concrete was the natural choice over steel for Hayden Ferry Lakeside. Its high quality, fire resistance, compatibility with numerous architectural styles, and minimal floortofloor height made it the ideal choice. Constructability of the concrete frame is efficient. Having all columns aligned in the transverse direction will allow an economical fly-form system to be used for all buildings. Optimizing the number and location of concrete walls will result in an exceptionally fast construction schedule. The first building is expected to be complete in 2006 at a construction cost of approximately $30 million dollars.
SunCor, Tempe, Arizona
Callison Architecture, Seattle, Washington
Cary Kopczynski & Company, Seattle, Washington
McCarthy, Tempe, Arizona