Precast Concrete Creates Textural Surface Facade for Hartford Hospital Hudson Street Employee Parking Garage, Hartford, CT
When the architects at Perkins+Will began brainstorming design ideas for the new nine-story employee parking structure at Hartford Hospital, they started by asking themselves how to create an evolutionary transformation of a modern, late-1940s hospital into a definable campus image that can also be a beacon of safety and excellence in service to its community.
“While traditional garages have a flat concrete panel, the design team was interested in introducing a sense of scale and texture into the system,” says Anthony Caputo, senior project designer with Perkins+Will in New York. They also wanted to incorporate shingling concepts usually found in systems of slate roof and wood cladding to achieve perceived dynamic texture which changes over the course of the day through shadow.
All the precast components were manufactured by Unistress Corporation, of Pittsfield, MA
Photo courtesy of HalkinMason Photography, Philadelphia, PA
Precast NEBT Deck Girders Assist in Accelerated Construction on the Route 10 Bridge over the Manhan River, Easthampton, MA
Drivers in Easthampton, Massachusetts, were braced for as many as two construction seasons without the Northampton Street Bridge over the Manhan River, requiring a detour around a 1.5-mile stretch of businesses along the road. They were happy to find that the bridge’s design, which included custom-sized precast concrete New England Deck Bulb Tee beams for the superstructure, would allow for the project’s completion in six months; in fact, it was finished in less than five months.
“When it became apparent that MassDOT would have to close the bridge during replacement, we designed a superstructure that could be replaced quickly, thereby limiting mobility impacts,” says Jeff Finitz, vice president at Diversified Technology Consultants Inc. “We liked the idea of the deck bulb tee (DBT) beams because they didn’t require a separate pour for the deck.” The DBT beams are designed specifically to meet conditions in New England and offer five sizes that provide long, clear spans.
The single-span, which replaces a 62-year-old design, features eight 93-foot-long 1220NEBT deck girders that are 4 feet deep and have a 5-foot-wide top flange that varies from 8 to 10 inches deep. “We used the most efficient size to span the distance,” Fintz says. Designers talked with officials at the New York Department of Transportation, who had experience with this span length of DBT beams in this type of situation, he notes.
The precast concrete New England Bulb Tee (NEBT) beams were fabricated by J.P. Carrara and Sons Inc. of Middlebury, Vermont.
Photo credit: Photo courtesy of J.P. Carrara and Sons Inc. of Middlebury, Vermont
Construction Video of The Greater Easthamption Chamber President Patrick Brough during the installation of the 8 beams throughout the day. Coutesy of Easthamption Chamber President Patrick Brough.
I-91 Bridge, Windsor, VT
Officials at the Vermont Agency of Transportation required a 100-year service life for the new twin bridges carrying I-91 over VT-44 and Mill Brook in the Town of Windsor. To achieve this goal in the most economical way, designers specified 157-foot precast concrete bulb-tee girders for the four-span bridge.
The existing bridges were structurally deficient, having been built as part of the highway’s creation in the early 1960s. They had met their 50-year design life, and officials wanted to ensure the new structures offered longer durability and lower maintenance needs. Designers were given a choice between precast concrete and high-performance steel, and both were evaluated.
“Pricing was not conducive for the steel option,” explains John Wilson, senior project manager for Jacobs Engineering Group, which worked on the design-build project with Lane Construction Corp. The temporary supports required during construction for the staging to support the two-span steel option added a significant cost to the project, he says. “We created a precast concrete design, which not only provided a simpler construction method but will reduce maintenance and inspection needs for the owner.”
The precast concrete components were fabricated by Northeast Prestressed Products LLC, Cressona, Pennsylvania
Photo courtesy of Jacobs Engineering, Bedford NH.
FIU Webinar Series:
New York State’s I-84/Dingle Ridge Road Lateral Bridge Slide
Jerry A. DiMaggio, PE, D.GE
SHRP2 Implementation Coordinator TRB
Bala Sivakumar, PE
Vice President/Director-Special Bridge Projects,
Thursday, December 19, 2013
1:00 to 2:00 p.m. (Eastern)
This webinar presents the planning and results of the subject ABC bridge slide project in New York State. In 2011, as part of an ongoing Strategic Highway Research Program, SHRP2 R04 project, the Transportation Research Board and FHWA’s Highways for LIFE program identified the I-84 Eastbound and Westbound Bridges over Dingle Ridge Road, owned by New York State Department of Transportation Region 8, as a viable candidate to demonstrate accelerated bridge construction methods for replacing an existing structure via the lateral slide method while making use of a concrete superstructure. This project was completed over two weekend periods (20 hours closure each) in September and October of this year. The presentation focuses on the technical details of the project.
PCI Northeast and MAPA
To Exhibit at NIBS Conference
January 6-10, 2014
MAPA and PCI Northeast will jointly exhibit and participate in technical sessions at the National Institute of Building Sciences (NIBS) Building Innovation conference in Washington DC on January 6-10.
Building Innovation 2014: The National Institute of Building Sciences second annual Conference & Expo will explore Advancing Life-Cycle Performance. During the Conference, the Institute will look back on its 40 years of leadership and advocacy and present an informative agenda that highlights its activities and programs for developing innovative solutions for the built environment.
FEATURED LEARN AT LUNCH PRESENTATION
High Performance Architectural Precast Wall Systems
High Performance Architectural Precast Concrete wall systems have gained incredible recognition from sustainability
practitioners who herald its durability, energy efficiency, mold/mildew resistance, use of recycled materials,
construction waste, and improved construction IAQ. Due to this recognition, these wall systems are being specified
in K-12 school construction, condominiums, hospitals, university dormitories, science buildings, office complexes,
and many other LEED-certified projects throughout the U.S. Topics that are covered in this workshop include:
appearance options; sandwich-wall design; thermal performance; material R-values and assembly R-values; moisture
management; and LEED credits to which precast concrete can contribute.
Length: 1.0 Hour | Credits: AIA HSW 1.0 LU | PDH: 1.0
PCI Announces New Blast Design Manual
PCI’s Blast-Resistant Design Manual, First Edition (MNL 141-12) is now available as an ePub at www.pci.org/epubs.
This manual describes the basic process of blast-resistant structural design for precast/prestressed concrete components.
It includes calculating blast loads on the component, determining the dynamic response of the component, checking the
response against specified performance criteria, designing the component connections, and checking the component for
adequate shear capacity. The emphasis in this manual is on blast loads from exterior explosions and the dynamic analysis
of blast-loaded structural components idealized as equivalent single degree of freedom systems. These assumptions simplify
the blast-resistant design procedure discussed in this manual, but they apply to many cases of practical interest for
anti-terrorism and force protection design. For more details and purchasing information, visit www.pci.org/epubs.
Curved Precast Concrete Bridges State-of-the-Art Report
This publication details the application of curved precast concrete bridge design, fabrication, construction techniques, and
considerations through the study of twelve related projects and constitutes a state of the art report on this topic. The
document was written and intended to provide bridge owners, designers, fabricators and engineers an up-to-date reference
in developing precast concrete bridge solutions for curved geometric situations. The topics include: Straight Girders chorded
from Pier to Pier, Straight Girders Segments with Splices within the Spans, and Curved Precast Girders. Each case study
reviews project specific information, the structural system selected, construction techniques used and the lessons learned.
For more details and purchasing information, visit www.pci.org/epubs.
Updated Fire Publication Now Available on PCI's e-Publication Site
PCI/ICC's Design for Fire Resistance of Precast Prestressed Concrete, Third Edition (MNL 124-11) is available as an electronic publication at
Subscribe to PCI's Ascent Magazine (It's FREE!) or if you prefer read it online.
PCI is proud to offer the first education management system dedicated to the precast concrete and precast structures industries, the PCI elearning Center.
All courses offered through this system satisfy the continuing education requirements of engineers in all 50 states! As an AIA provider, PCI is able to
offer architects approved Learning Units to satisfy their continuing education requirements. Be sure to bookmark us and visit often as we populate this
interface with more and more free, easy-to-access, always-available coursework.
Stay in Touch with PCI Industry SmartBrief.
PCI Buildings Industry SmartBrief, is a weekly e-mail newsletter specifically designed for buildings professionals.
Every week, PCI Buildings Industry SmartBrief will carefully select news stories that are of interest and relevance to designers
and deliver them straight to your inbox.
More than 1,060 of your peers in the buildings industry have signed up for PCI Buildings Industry SmartBrief to stay ahead of
the curve. Here is your chance to join them, for free.
PCI Buildings Industry SmartBrief can help you break through the information clutter with summaries of articles relevant to you.
It can be read on your mobile device as well.
Sign up today so you don’t miss another issue.