ABCD Northeast Ohio Newsletter
October 2007
2007-2008 Officers and Board Members
The officeholders for 2007-2008 are as follows -
Officers:
President Greg Kronstain
Vice President Matt Lawler
Secretary Jonathan Hren
Treasurer Richard Walters
Board of Directors:
Bob Beasley
Daniel Baxter
Jeff Spangler
Mike Russell
Frank Bronzo
Tom Stora
Committee Chairs:
Programs Tom Stora
Membership Daniel Baxter
Awards Matthew J. Lawler
Seminars David W. Leake
Education William Vermes
Newsletter James OLeary
ABCD Awards Winners
Congratulations to the 2006 winners --- the Ramp C Flyover Bridge (I-75/I-70 Interchange) and the Perry Street Bridge over the Maumee River!
Ramp C Flyover Bridge (I-75/I-70 Interchange)
Owner Ohio Department of Transportation
Contractor Kokosing Construction Company
Engineer CH2M HILL
The 2,376' curved steel girder bridge is now the longest in ODOT
District 7. Its sweeping alignment is accented by the images of F-16's
on each of its 19 piers.
Perry Street Bridge over the Maumee River
Owner The Ohio
Department of Transportation
Contractor Fru-Con Construction
Corporation
Engineer HNTB Ohio, Inc.
Having the appearance of a concrete arch, this 7-span, variable depth,
spliced pretensioned/post-tensioned concrete
bulb T-girder bridge was constructed in an
astonishing 9 months.
ODOT Introduces New Policies on Skewed Bridges and Deck Placement
At a seminar held on April 24 at the ODOT Central Office Auditorium, the Ohio Department of Transportation discussed new policies relating to the design of skewed bridges and pouring bridge decks. These policies have been put into effect to try to alleviate recent problems encountered during construction and to raise awareness of the issues involved.
The new design policy for skewed bridges can be summarized as follows:
· For bridges with skew angles less than 30 degrees, the effects of skew do not have to be considered.
· For bridges with skew angles between 30 and 45 degrees, the differential deflection between beams must be less than the beam spacing divided by 100. If not, a refined analysis must be performed and the beams may have to be redesigned or other measures may have to be taken.
· For bridges with skew angles greater than 45 degrees, a refined analysis must be performed. If the girder twist is greater than 1/8 inch per foot, the beams either have to be redesigned or other measures may have to be taken.
The new deck policies require that the effects of twisting of the overhang bracket be investigated. This is caused by three components:
· oil canning, which must be investigated for girders with depths greater than 78
· warping effects, which must be investigated for all decks
· global deflection, which must be investigated if the load on the exterior girder is more than 110% of the load on the interior girders
In addition, the deck must be poured along the skew and the use of slotted holes in cross frames will no longer be allowed.
The preceding is a very brief summary if the information presented at the seminar. More information, including a video of the presentation, can be found at http://www.dot.state.oh.us/se/skew/skew.htm.
Upcoming Meetings
October John Dietrick of Michael Baker will speak about the unique public involvement and bridge type selection process employed for the new Ohio River crossing to carry I-65 between downtown Louisville, KY and Jeffersonville, IN, including an overview of the first use of preference polling on a major bridge project. The meeting will be held at the Holiday Inn Akron West (4073 Medina Rd, Akron) on Wednesday, October 17.
November The November meeting will be a luncheon on Wednesday, November 7th at Stancato's in Parma. The speaker will discuss cathodic protection.
December The December meeting will be the annual Christmas Party. This will be a joint meeting with ITE, ASHE, and ASCE.
January To be determined.
February Awards Dinner