Mixed Apartment Complex
Small City, PA
Antonio Thomas │ Structural
Adviser │ Dr. Thomas Boothby, P.E., R.A.
Part 1
Building Info
Building Name
Location
Occupancy
Size
Number of Stories
Construction Dates
Overall Project Cost
Project Delivery Method
Mixed Apartment Complex
Small City, PA
Mixed-Use
301,107 sq. ft
10 above grade
08/2017 - 08/2019
$75 Million
Design - Bid - Build
Project Team
Owner
General Contractor
Construction Manager
Architect
Structural Engineer
MEP Engineer
Civil Engineer
Pinecrest
Rycon Construction, Inc.
Massaro Construction Group
Desmone Architects
WBCM
BDA Engineering
Civil & Environmental Consultants
Architecture
Located between several campuses of various universities, Mixed Apartment Complex has a different look and feeling to it than the surrounding buildings, due to its more modern appearance. In fact, multiple modern style, luxury apartments, similar to this one, are being erected throughout the area; quite a close resemblance to downtown State College, PA. Apartment units are going to have to an open floor plan for natural, free flowing activity; as well as the ceiling being exposed slab to provide more openness within the space. The building is going to provide to large, open lounge spaces (indoor lounge & outdoor courtyards), for guests to gather and interact; including a large fitness area too. All the collaborative areas are located on the 3rd floor due to the first two floors being a parking garage for residents, which will offer a better view and experience to the space than if it were located on the ground level.
Zoning & Applicable Codes
This mixed-use complex is located in a district, in which it is a special public realm due to the intensity of various uses within the area. These uses can span from retail to educational to medical to multi-unit residential to religious/cultural places. It is a special zone that has no setback requirements, other than one exception, which has presented some difficulties; maximum height requirements have also presented challenges for this type of building.
The following standards and references are some that were used:
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IBC 2009
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ASCE 7-05
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ACI 318-08
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AISC, 13th Edition
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NFPA 72
Building Enclosure
Sustainability
The project is pursuing for LEED credits that will include, but not limited to the following:
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Site was previously developed
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Development should have little impact upon the stormwater management system
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Water use should be reduced with hot water being distributed efficiently
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Materials will be locally sourced
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Building acoustics should provide a great amount of comfort
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Energy efficiency should be greater than ASHRAE 90.1-2010’s performance baseline
Structurally, Deltabeams have helped include an additional 2 stories; while precast planks helped with the time of construction.
For the first two floors, the façade is made up of textured brick with plantings wall and planters throughout to provide some greenery back to the site. The remaining floors of the building will have a façade that is made up of fiber cement (Stucco) panels, metal reveals to enhance that separation between panels, and perforated screens throughout to provide that modern look. The windows are made up of Crystal’s 2100 Series which have 7/8” insulated glass and minimal trim for as much daylighting to enter.
The roofing of the structure is constructed as the following, from the top of the hollow core plank and upwards:
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Vapor retarder
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Vapor barrier
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Rigid insulation that has an inch minimum thickness and R-18 value
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½” coverboard
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60 mil TPO membrane
Part 2
Construction
This project used a Design – Bid – Build method with Rycon Construction, Inc. serving as the general contractor. Beginning in August 2017, the demolition of two existing, one story structures within the building footprint had to occur. By August 2018, the structural system was almost complete with some of the other engineering systems being about to ready to be placed in. The project is expected to be completed and ready for occupants in August 2019 with an overall project cost of approximately $75 million.
Mechanical
Each apartment unit will have individual heating and cooling units that allows occupants to maintain their desired climate regardless of other units within the building. On the ground level, the various public spaces will have separate units that serve their occupancy type as best as possible; all servicing units are located in a generator room on the ground floor. Outside air is brought in through various outside air louvers on different floors and through two MAU located on the roof, in the center of the building.
Structural
The structural system is made up of W12 sized columns, in which Deltabeams are connected to in order for loading to transfer down to the foundation. This foundation is slab-on-grade upon caissons that reach a depth of 24’. The floors are hollow core concrete planks that are typically 10” deep, spanning approximately 25’ on average. Resistance to lateral forces is provided by concrete stairwell shafts that extend the full height of the building, and a combination of both braced frames and moment frames.
Lighting & Electrical
The building is fixed with LED downlights throughout its entirety with ceiling occupancy sensors located in common areas to reduce the energy usage throughout the building. The lobby consists of some large, hanging pendant fixtures where spaces have higher ceilings in order to enhance the experience of that space. Also, there are photocells mounted on the roof in order for exterior lighting to be controlled.
Due to there being various tenants within the building, each runs off different panelboards in order to provide electricity separately, as needed. For retail areas, they’re powered by 120/208V, three phase, four wire main circuit breaker panelboards with a 200A or 400A main circuit breaker (MCB). Whereas the apartment units are powered by 120/208V, single phase, three wire panelboards with 100A or 125A MCB.
Fire Protection
There are two means of fire detection, through a combination of heat detectors and smoke detectors. Auditory and visual communication will be utilized with the alarm system in order to notify occupants. The building uses a standpipe system for the sprinklers due to the height of the top floor being too high for the fire department to access. Due to the Deltabeam being filled with concrete, it does not require fireproofing on it and is able to achieve a fire rating of 2+ hours.
Telecommunications
There are a two telecommunications rooms designated to every 3rd floor, beginning on the 4th floor. Each floor that contains these rooms has one located on each end of the building, serving its own floor as well as the next two above it, with exception to the top floor (10th floor).