Andrew Simone

Building Data                                                    

 

                       Building Name:   The Hub on Chestnut

 

                        Location:  Philadelphia, Pennsylvania

 

                        Site:  3943-45 Chestnut Street

                                    (NE corner of 40^th and Chestnut Streets)

 

                        Building Occupant:  Private Residences

 

                        Occupancy:  101 Residential Units/ 3 Retail Levels

 

                        Size: 30,000 SF (Commercial)

                                    68,000 SF (Residential)

 

                        Stories: 10 levels (1 sub-grade/9 above-grade)

 

                        Dates:  Start 6/1/05

                                                Top-Out 7/15/06            

                                                            Finish 12/25/06

 

                        Cost:  Overall Project – $22.3 million

                                                Building - $14,734,645

 

                        Delivery Contract:  Design-Build

 

Primary Project Team                                            

 

                        Owner:  Teres Holdings, LLC

                                   

                        Construction Manager:   Domus, Inc

                                   

                        General Contractor:   Domus, Inc

                                   

                        Design Architect:   Piatt Associates, Inc

                       

                        Project Architect:   Brawer & Hauptman Architects

                       

                        Structural Engineer:   O’Donnell & Naccarato

 

                        Civil Engineer:   Barton & Martin Engineers (Vollmer Associates)

 

                        MEP Engineer:   AKF Engineers

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Architecture

 

• The Hub on Chestnut is designed to accommodate a mix-use of occupants.  The building’s main focus is to house University of Pennsylvania students in 101 units distributed over seven (7) above-ground levels.  Units are also available to the public.  A variety of different sized units are designed for single to multiple parties. The lower three (3) levels will provide commercial spaces directed to mercantile and retail clients.
• The 9-level structure will be at a height of 109 feet above grade.  The building footprint covers 10,500 square feet of the NE corner of 40^th and Chestnut streets.  The street and second levels will have a floor-to-floor height of approximately 15 feet, while the above levels will be at 10 feet.  The north mid-section of the structure will house twin elevator shaft with a stair egress.  The west end will provide an alternate stair egress. 
• The street-level commercial space provides a large 40 foot oval opening in the floor to provide a double heighted space in the retail areas.
• Interior designs’ main focus was to be rustic and modern. An open HVAC system allows for an exposed mechanical system. All concrete is to be finished.  Finished floors and ceilings are to be sanded and sealed concrete.
• The building is located in the University City section of Philadelphia. The prominent property owners of this area consist of University of Penn and Drexel University.  University City’s community is a cultural area which exhibits a very mixed architecture between historical, nostalgic buildings and unique, modern structures.
• The Hub on Chestnut will be the most noticeable structure in the community.  The building envelope is complied of large prefabricated panels, a high-tech rain screen system, which is cladded with corrugated metal sheets, aluminum flat green panels, and multi-colored wood veneer panels.  

 

Structure 

• A concrete moment frame is the original structural system.  Starting one level below grade, the superstructure is a system of exterior and interior concrete columns that support a concrete slab throughout each level. 
• The columns located on the lower levels are sized 30” x 30” while the upper floors (3-9) are sized 20” x 30”.  All reinforcement uses a #3 bar tie spaced twelve inches on center with varying vertical rebar ranging from #7 to #10 bar.  Three column lines create twelve (12) nearly square bays.  A typical bay size is 28’ x 28’.
• The foundation system is comprised of concrete caissons and spread footings with a compressive strength of 3,000 PSI.  All exterior walls are 12-inch reinforced cast-in-place concrete.  Interior walls are a mix of CMU blocks and CIP concrete.
• The lower commercial spaces are designed using a 12-inch two-way slab with square concrete columns as the functional supports.  The upper residential levels use a 9-inch post-tensioned two-way slab with a mixed use of rectangular and circular concrete columns.  The typical two-way slab is reinforced with #4 bars spaced continuously at 30” in each direction.  Additional reinforcement (5 - #8 bars) is placed at the top and bottom in both directions where mild reinforcing is needed. 
• The post-tensioning strands are placed along each long column line and at intermediate bays.  The typical tendon is a half-inch 270k seven-wire strand.  The jacking forces range from 85k to 435k.  The lower stressed tendons are spanned in the short direction.  All columns and slabs are designed using 5,000 PSI high strength concrete. 
• The lateral system does not include any braced frames or shear walls to resist the effects of wind and seismic loading.  The immense columns are sized to absorb, or resist, the large moments that are distributed throughout the structure under lateral loading classifying the structure as a ordinary concrete moment frame.