International Bridge Technologies

Puente De La Unidad – Monterrey, Mexico

Technical details
Municipio de San Pedro Garza García, State of Nuevo León Secretary of Communications and Transport

Construction Completed: 2003

Monterrey, Mexico
Contractor: Grupo Garza Ponce and VSL Corporation, General Consultant: Sistemas Óptimos Constructivos, S.A. (SOCSA)
SYSTRA IBT’s Role: Bridge Design Consultant, detailed design and construction engineering for the cable-stayed bridge, technical assistance on site.


Main Span: 137 m (449 ft)

Bridge Length: 304 m (997 ft)

Width: 24 to 33 m (79 to 108 ft) (four traffic lanes, shoulders, and a central walkway).

The total bridge length is 304 m (997 ft), with the central pylon inclined at 60 degrees partially balancing the weight of the main span. The width of the bridge varies between 24 m and 33 m (79 ft and 108 ft). On and off ramps merge onto the bridge on each side of the pylon. The bridge superstructure is supported along its sides by 13 sets of stay cables with a “harp” arrangement.

The superstructure consists of longitudinal concrete edge beams, transverse steel beams, and a concrete slab. The pylon design allows traffic on the roadway parallel to the river to pass directly through the base of the pylon. The bridge construction scheme was unidirectional cantilever with traveling forms and moveable supports.

The bridge’s special aesthetic features include architectural light­ing and the use of white concrete. The bridge was built on a fast-track schedule with start of design in October 2001 and completion of construction in September 2003.

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