Project Scope
Main Cable Investigation utilizing the firm's proprietary BTC Method for the evaluation of cable strength:

- Random sampling of wires from each investigated panel.
- Fracture based analysis of cracked wires.
- Probabilistic analysis of remaining current & future cable strength.
- First installation of corrosion sensor in a bridge cable.
- Special testing that includes:

• Identification of wire fracture toughness utilizing the firm's proprietary procedures.
• Enhanced tension test which produces full stress strain curve for each tested wire.

Bridge Owner
MTA Bridges & Tunnels

Bridge Location
New York City, New York, USA

Bridge Features

• Opened to traffic: April 29, 1939
• Length of main span: 2300 feet
• Length of side span: 735 feet

Project Scope
The project is sponsored by the New York State Bridge Authority and the New York State Department of Transportation. Bridge Technology Consulting Scope is to conduct main cable investigation utilizing the firm's proprietary BTC Method for the evaluation of cable strength:

- Internal Inspection & Random Sampling of wires.
- Fracture based analysis of cracked wires.
- Probabilistic analysis of cable strength.
- Forecast of the strength of main cables.
- First identification of the fracture toughness of bridge wires, utilizing
- BTCs proprietary procedure.
- Special testing that includes:

• Identification of wire fracture toughness utilizing the firm's proprietary procedures.
• Enhanced tension test which produces full stress strain curve for each tested wire specimen.

Bridge Owner
New York State Bridge Authority

Bridge Location
Highland, New York, USA

Bridge Features

• Opened to traffic: August 25, 1930
• Length of main span: 1500 feet
• Length of side span: 750 feet

Project Scope
Bridge Technology Consulting is the lead suspension bridge expert for replacement of existing suspension system and bridge deck for this historic suspension bridge in Brazil. BTC provides technical services for the design of new suspension system, design of new orthotropic deck, and load transfer from the existing eyebar suspension system to a new suspension system.

Bridge Owner
City of Florianopolis, State of Santa Catarina, Brazil

Bridge Location
Florianopolis, State of Santa Catarina, Brazil

Bridge Features

• Opened to traffic: 1926
• Length of main span: 1114 feet
• Length of side span: 226 feet

Project Scope
Cable Experts for the design and construction support for the full replacement of the entire set of suspender cables on these twin suspended arch bridges.

Bridge Owner
New York State Department of Transportation

Bridge Location
Albany County, New York, USA

Bridge Features

• Opened to traffic: 1959
• Length of main span: 600 feet
• Length of side span: 120 feet

Project Scope
BTC is a member of the team providing total design services for the Seismic Analysis and Retrofit Design of the Queensboro Bridge in New York City. The Bridge is a major East River crossing between Manhattan and Queens with the main truss being a total of 3,724 ft. in length. It carries a total of ten lanes of traffic on two levels. Pier columns and foundations are comprised of unreinforced concrete masonry. Work includes strengthening of masonry concrete pier columns and spread footings with reinforced concrete, steel shells, CRP fabric and internal tie rods. Analysis includes Analyses included creating a finite element model for the main spans and approach spans; geotechnical investigation to accurately model the soil-structure interaction.

Bridge Owner
New York City Department of Transportation

Bridge Location
New York City, New York, USA

Bridge Features

• Opened to traffic: March 30, 1909
• Longest span: 1182 feet

Project Scope
Cable Experts for main suspension cable inspection and evaluation of the condition of the strands in the anchorage. Provided visual assessment of the condition of the main cables, suspender ropes, and cable bands.

Bridge Owner
MTA Bridges & Tunnels

Bridge Location
New York City, New York, USA

Bridge Features

• Opened to traffic: November 21, 1964
• Length of main span: 4260 feet
• Length of side span: 1215 feet

Project Scope
Cable Experts for main suspension cable inspection and evaluation of the condition of the strands in the anchorage. Provided visual assessment of the condition of the main cables, suspender ropes, and cable bands.

Bridge Owner
MTA Bridges & Tunnels

Bridge Location
New York City, New York, USA

Bridge Features

• Opened to traffic: April 29, 1939
• Length of main span: 2300 feet
• Length of side span: 735 feet

Project Scope
Cable Experts for main suspension cable inspection and evaluation of the condition of the strands in the anchorage. Provided visual assessment of the condition of the main cables, suspender ropes, and cable bands.

Bridge Owner
MTA Bridges & Tunnels

Bridge Location
New York City, New York, USA

Bridge Features

• Opened to traffic: July 11, 1961
• Length of main span: 1800 feet
• Length of side span: 555 feet

Project Scope
Cable Experts for main suspension cable inspection and evaluation of the condition of the strands in the anchorage. Provided visual assessment of the condition of the main cables, suspender ropes, and cable bands.

Bridge Owner
MTA Bridges & Tunnels

Bridge Location
New York City, New York, USA

Bridge Features

• Opened to traffic: 1936
• Length of main span: 1380 feet
• Length of side span: 700 feet

Project Scope
Bridge Technology Consulting was tasked to evaluate the remaining strength of the main cable utilizing the firm's proprietary BTC Method for the evaluation of cable strength. The cable investigation was based on existing test data collected by others. The project was completed in 2006.

Bridge Owner
MTA Bridges & Tunnels

Bridge Location
New York City, New York, USA

Bridge Features

• Opened to traffic: April 29, 1939
• Length of main span: 2300 feet
• Length of side span: 735 feet

Project Scope
Bridge Technology Consulting Scope is the identification of the fracture toughness of the main suspension cable wire utilizing the firm's proprietary procedures. This allows for Fracture based analysis of cracked wires and the forecast of future strength of the cable strength. Project was completed in 2007.

Bridge Owner
New York State Bridge Authority

Bridge Location
Highland, New York, USA

Bridge Features

• Opened to traffic: August 25, 1930
• Length of main span: 1500 feet
• Length of side span: 750 feet

Project Scope
Bridge Technology Consulting provided the design for seismic isolation system to the Design-Build Team for this 259 ft long truss pedestrian bridge. The isolation system demonstrated a significant reduction in the lateral seismic forces transmitted to the substructure versus the original design provided by others. BTC's seismic isolation design minimized the impact on the foundation system.

Bridge Owner
Metro-North Railroad

Bridge Location
New York City, New York, USA

Bridge Features

• Opened to traffic: March 2009
• Longest span: 259 feet

Project Scope
Instrumentation and fatigue analysis of the LINK ARMS that support the counterweights at the Loop Parkway Bascule Bridge over the South Oyster Bay in Long Island, New York. Hanger plates were instrumented with strain gages to measure the induced stresses due to the open/close operations of the bascule span.

Bridge Owner
New York State Department of Transportation

Bridge Location
Long Island, New York, USA

Bridge Features

• Opened to traffic: 1934
• Length of Bascule Leaf: 46 feet

Project Scope
Full deck replacement analysis of the suspension bridge. The entire suspension bridge was modeled using GT Strudl Structural Program to establish safe deck replacement sequence. The analysis verified the deck replacement sequence without overstressing stiffening truss members and suspender ropes. Project was performed while working for another engineering firm. The project was featured in ENR magazine

Bridge Owner
Kentucky Transportation Cabinet

Bridge Location
Maysville, Kentucky and Aberdeen, Ohio, USA

Bridge Features

• Opened to traffic: 1931
• Length of main span: 1060 feet
• Length of side span: 465 feet

Project Scope
This new monumental bridge at Bordeaux, the Pont Bacalan-Bastide, whose construction work has started in January 2010, is due to be completed and opened in 2012. The bridge connects the Bacalan (left bank) and la Bastide quarters (right bank) of Bordeaux. The bridge has been nicknamed 'le Pont Ba-Ba'. The lift span will have a symmetric cross section and carry four traffic lanes, two monorail tracks and two outboard sidewalk/bikeways. Four independent pylon towers, one at each corner of the lift span, are utilized to house four independent counterweights which will travel vertically inside the pylons to operate the lift span. High strength steel cables passing over 4-meter diameter sheaves will connect the lift span to the counterweights.

As a Consultant to EGIS JMI, BTC provides cable expertise on design and construction of operating and suspension cables for the lift bridge.

Bridge Owner
City of Bordeaux, FRANCE

Bridge Location
Bordeaux, FRANCE

Bridge Features

• Length of mobile, lifting section: 117 meter
• Navigable channel width: 106 meter
• Pylon height: 77 meter
• Height of raised section above water when lifted: 53 meter
• Weight of lift section: 2,600 tons

Project Scope
As senior bridge engineer for another firm, Dr. Mahmoud worked on the preliminary design of this lift bridge. The lift span will have a symmetric cross section and carry four traffic lanes, two monorail tracks and two outboard sidewalk/bikeways. Four independent pylon towers, one at each corner of the lift span, shall be utilized. Four independent counterweights (weighing ¼ of the lift span) will travel vertically inside the pylons. High strength wire ropes passing over the sheaves shall connect the lift span to the counterweights.

Bridge Owner
City of Bordeaux, FRANCE

Bridge Location
Bordeaux, France

Bridge Features

• Length of Lift Span: 117 meters
• Navigable Channel Width: 106 meters

Project Scope
This cable-stayed bridge over the Suez Canal consists of a 404-metre (1,325 ft) main span and two 1.8-kilometer (1.1 mi) long approach spans. The height of the two main pylons supporting the main span is 154 meters (505 ft) each. The towers were designed in the shape of Pharaonic obelisks. The clearance under the bridge is 70 meters (230 ft), which defines the admissible maximum height of 68 m above the waterline of ships that can pass through the Suez Canal.

BTC provides consultation on the cracking of the overlay of the orthotropic deck of the main span and is currently preparing rehabilitation alternatives.

Bridge Owner
General Authority for Roads & Bridges & Transport, Ministry of Transport and Communication, Egypt

Bridge Location
El Qantara, Egypt

Bridge Features

• Opened to traffic: October 2001
• Length of Main Span: 1,325 feet
• Clearance Above Water: 230 feet