Building Statistics
General Building Data
Building Name:
Location and site:
Building occupant name:
Occupancy type:
Size:
Number of stories above grade:
Overall project cost:
Dates of construction:
Project delivery method:
AC Hotel Philadelphia
230 North 13th Street, Philadelphia, Pa 19107
Baywood Hotels
(R-1) Residential transient hotel use with Accessory (S-2) valet parking, (A-2) Assembly (Restaurant/Bar), (A-4) Pool/Fitness, Storage and Mechanical
107,680 sq.ft.
14 with mechanical penthouse and roof terrace (15 occupied stories)
$35,000,000
Fall 2015 - Summer 2017
Design-bid-build
Primary Project Team (with links to webpages)
Owner:
General Contractor:
Architect:
Structural Engineer:
Mechanical/Electrical/Plumbing:
Acoustical Consultant:
Sustainability Consultant:
Owner’s Food Service Consultant:
Commissioning Consultant:
Kurt Blorstad
Clemens Construction
Spg3
Holbert Apple Associates
McHugh Engineering
Metropolitan Acoustics
Studio 3volve
Space By Spielman
Wright Commissioning
Major National Model Codes
City of Philadelphia Building Code with Current Amendments
2009 International Building Code
2012 Chapter 11/IBC 2012 Accessibility Requirements
Elevator Requirements ASME A17.1
2009 International Mechanical Code
2009 International Fuel Gas Code
2009 National Plumbing Code
2009 International Energy Conservation Code (IECC)
2009 National Electrical Code (NEC)-NFPA 70
2009 International Fire Code
NFPA 101- Life Safety Code
2012 American with Disabilities Act (ADA) Standards for Accessible Design
2014 AC Hotels by Marriott Design Standards
2015 AC Hotels by Marriott Module 14 FLS Design Standards
Construction
Construction for 230 North 13th street is expected to get underway beginning in late October of 2015. The general contractor leading this project is Clemens Construction, Some demolition of the existing two-story structure will take place first so that the mat slab can be poured for the new hotel before the superstructure is erected. Building construction is expected to be completed by mid 2017. The project delivery method for AC Hotel Philadelphia is the traditional design-bid-build. Due to the fact that the structure is being built with existing buildings around it, it is crucial to have a plan of where construction materials (laydown areas) will be placed around the site.
Architecture
Located in the heart of the City of Brotherly Love, AC Philadelphia looks to convert the old film-distributing studio into a dynamic, modern-formed residential area. This 150 unit hotel will include a small restaurant and an underground, valet parking garage which can only be accessed by car elevator. Designed by spg3, the architects look to provide a new, slim and sleek tower to attract younger, tech-driven travelers and to complement the existing art deco design.
Figure 1: Preliminary exterior rendering of AC Marriott Philadelphia showing the new hotel atop of the existing structure. (Courtesy of uwishunu.com)
Building Enclosure
Building Facade
The building façade of AC Marriott will primarily consist of a ALPHATON terracotta rainscreen system to enhance air circulation and reduce energy consumption. The rainscreen panel system has double-leaf panels (approx 1 3/8" thick) which are attached to the aluminum sub-structure by panel clips at the head grooves and base channels. The lower floors are comprised of a 4” brick veneer which encloses an 8", reinforced CMU bearing wall (existing structure).
Figure 2: Brick Veneer Section
Figure 3: Rainscreen Panel System Section
AC Marriott is incorporating a modular green roof system on a ballasted EPDM (ethylene propylene diene terpolymer) roof system on a tapered rigid insulation on metal deck. The EPDM system is being utilized because of its natural air-conditioning qualities. A ballasted roof uses natural river stone which keeps the membrane surface between 90-105 degrees F. This is the same as a highly reflective roof, without using reflective materials which can impact close-by devices or systems.
Roofing System
Historical Requirements & Zoning
Figure 4: Roof section showing intensive green roof.
Originally the building was the home of Warner Bros. distribution building/NFL Films, achieving a height of 31’ and 7,350 total sq.ft. The existing structure consists of a two-story masonry building (Big Brother Big Sister of America). AC Marriott Philadelphia will be restructured to support the new, 14 story residential hotel. The existing building will be gutted, and a mat foundation will be installed so that the superstructure is sufficiently supoprted. Some underpinning of adjacent structures will take place during foundation construction to ensure proper bracing.
Figure 5: Floor plan showing required setbacks. SPG3 architects used this setback space to provide an extensive green roof.
Under section 403, AC Marriott must comply with High Rise Emergency Systems since it exceeds 75ft. The Philiadelphia Historical Commission also required the 12-story vertical addition must be set back 18ft from its original boundaries. The developers must make an agreement with the Department of Licenses and Inspections and also regularly submit their plans to L&I otherwise they will be faced with penalties.
Figure 6: Location of AC Marriott Philadelphia (existing building will be restructured to support the new hotel).
Figure 7: Rendering of AC Marriott Philadelphia post-construction.
AC Hotel Philadelphia plans to achieve the LEED Gold certification by including local materials, high-efficiency fixtures and appliances and several green roofs (intensive & extensive) which utilize a ballasted EPDM system. Occupancy sensors and CO2 monitors are installed for the safety and healh of the occupants Developers must also make an agreement with the Department of Licenses and Inspections and submit plans regularly otherwise they may face penalties.
Sustainability
Structural
Starting at the foundation, 230 North 13th street utilizes a mat slab (30"-42" thick) to provide adequate support for the superstructure above. Adjacent structures will need to be underpinned when the slab is poured. The beams supporting the lower green roofs are W12x19 @ 4' O.C. The gravity system is comprised of structural steel framing with a composite deck on the first two levels. Floors 3-14 and the penthouse floor are made up of a girder slab system. 8" thick hollow-core planks (4'0" O.C) are supported by dissymetrical beams (D-Beam). Interior spans are DB8x61 and exterior spans are DB8x37 typ. Laterally, multiple 14" shear walls span up to the third level. From level three and up, concentric braced frames (HSS6x6 and HSS8x8 typ.) stabilize the structure in both orthogonal directions. The D-beams are supported by wide-flange columns which range from W10x to W14x depending on how much load they must resist.
Figure 8: Courtesy Google images
Figure 9: Girder-slab system showing the concrete slab bearing on the D beam. Every 24" O.C an area is removed from the slab and. a transverse #4 rebar is installed,. Finally, grout backfills the rebar, this system creates composite action. (Courtesy girder-slab.com)
Mechanical
The AC Hotel Philadelphia is supplied by (4) three-ton air handling units serving telecommunication, fire command, elevator machines and the pool. There is an energy recovery wheel on the roof which mixes outside air with return air. There are also (2) 38"x38" 4-hour rated smoke ducts which exhaust above the penthouse level. Within the building, a plethora of fans are used to exhaust unwanted (class 3 and 4) air. There is a copper with stainless steel casing hot water coil that has a capacity of 65,000 BTU. All densily occupied spaces shall have a CO2 monitor adjacent to the thermostat which will send an alarm when concentration exceeds 1000PPM
Lighting/Electrical
The main circuit breaker has the capacity of 2500A. There is a 125 HP fire pump on the 277/480 system powered by the main circuit breaker On the roof, there is a 600KW generator for emergency situations. Within the building, there are both 277/480 & 120/208 voltage systems. The 277/480 system is for larger equipment and the majority of lighting is powered by the 120/208 system. A 30 KVA stepdown transformer is used to convert the higher-powered system down to the lower voltage system for normal lighting. There is also a low-voltage system for appliances under 50V. As for lighting, AC Hotel Philadelphia is using a 100% LED system. Most of the fixtures are downlights, pendants or sconce. Ambient lighting is used to reduce glare and create a comfortable atmosphere.
AC Hotel Philadelphia is classified as a high rise building (+75' above fire department access) under section 403, therefore, must comply with specific emergency systems. Within the building, smoke detection units are provided, a full fire alarm with voice/emergency annunciation, a smoke removal fire command center, and smoke-proof enclosures/pressurization at exit ways. Emergency, stand-by power is provided by the generator on the roof. A fire pump is in place and has the capacity to deliver 750 gpm @ 169psig driven by at 125hp motor. A jockey pump is also provided and can deliver up to 7.5gpm @ 190psig.
Fire Protection
Telecommunications
Vertical Circulation
The hotel is equipped with landlines in each unit, and access to internet and cable services, allowing occupants to have communication ability at any time. Other areas of the building such as the restaurant, lobby, and penthouse will also be equipped with proper communication devices. A rescue assistance system is in place to help stranded occupants in the case of an emergency. The panel has a 12-zone minimum capacity
At the cellar level, a car lifted is provided which hoists vehicles up to the first story(ground level). This car lift is utilized due to the lack of underground floor space. Two staircases are found on the northern end of the building, one on each side to allow for maximum egress if needed. Two elevators, side-by-side are at the core of the building, and provide the fastest means of transportation within the building.
Figure 10: Vertical circulation plan at the cellar level.
Figure 11: Vertical cirulation plan for the typical story.